/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:15:31,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:15:31,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:15:31,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:15:31,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:15:31,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:15:31,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:15:31,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:15:31,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:15:31,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:15:31,081 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:15:31,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:15:31,082 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:15:31,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:15:31,082 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:15:31,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:15:31,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:15:31,083 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:15:31,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:15:31,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:15:31,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:15:31,084 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:15:31,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:15:31,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:15:31,085 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:15:31,086 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:15:31,086 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:15:31,086 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:15:31,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:15:31,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:15:31,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:15:31,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:15:31,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:15:31,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:15:31,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:15:31,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:15:31,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:15:31,089 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:15:31,089 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:15:31,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:15:31,090 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:15:31,090 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:15:31,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:15:31,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:15:31,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:15:31,292 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:15:31,292 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:15:31,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c [2023-08-04 08:15:32,457 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:15:32,639 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:15:32,640 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c [2023-08-04 08:15:32,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdaf7e820/7dce36671a184f3391657a2fd7f04634/FLAG10de03efd [2023-08-04 08:15:32,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdaf7e820/7dce36671a184f3391657a2fd7f04634 [2023-08-04 08:15:32,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:15:32,661 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:15:32,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:15:32,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:15:32,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:15:32,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e14b0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32, skipping insertion in model container [2023-08-04 08:15:32,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,688 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:15:32,863 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c[2644,2657] [2023-08-04 08:15:32,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:15:32,878 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:15:32,897 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c[2644,2657] [2023-08-04 08:15:32,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:15:32,912 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:15:32,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32 WrapperNode [2023-08-04 08:15:32,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:15:32,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:15:32,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:15:32,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:15:32,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,953 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 234 [2023-08-04 08:15:32,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:15:32,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:15:32,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:15:32,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:15:32,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,965 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,965 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,973 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:15:32,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:15:32,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:15:32,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:15:32,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (1/1) ... [2023-08-04 08:15:32,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:15:33,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:33,021 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) [2023-08-04 08:15:33,027 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 [2023-08-04 08:15:33,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:15:33,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:15:33,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:15:33,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:15:33,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:15:33,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:15:33,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:15:33,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:15:33,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:15:33,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:15:33,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:15:33,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:15:33,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:15:33,049 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:15:33,137 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:15:33,138 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:15:33,423 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:15:33,433 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:15:33,434 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 08:15:33,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:15:33 BoogieIcfgContainer [2023-08-04 08:15:33,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:15:33,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:15:33,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:15:33,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:15:33,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:15:32" (1/3) ... [2023-08-04 08:15:33,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3173707c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:15:33, skipping insertion in model container [2023-08-04 08:15:33,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:32" (2/3) ... [2023-08-04 08:15:33,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3173707c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:15:33, skipping insertion in model container [2023-08-04 08:15:33,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:15:33" (3/3) ... [2023-08-04 08:15:33,452 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-array-int-symm.wvr_bound2.c [2023-08-04 08:15:33,459 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:15:33,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:15:33,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:15:33,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:15:33,597 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:15:33,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:33,808 INFO L124 PetriNetUnfolderBase]: 57/471 cut-off events. [2023-08-04 08:15:33,808 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:15:33,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 471 events. 57/471 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1814 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-04 08:15:33,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:33,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:33,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:15:33,847 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:33,851 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:33,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:33,919 INFO L124 PetriNetUnfolderBase]: 57/471 cut-off events. [2023-08-04 08:15:33,919 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:15:33,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 471 events. 57/471 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1814 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-04 08:15:33,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 15664 [2023-08-04 08:15:39,758 INFO L134 LiptonReduction]: Checked pairs total: 22293 [2023-08-04 08:15:39,759 INFO L136 LiptonReduction]: Total number of compositions: 274 [2023-08-04 08:15:39,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:15:39,777 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=true, 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;@75ff7af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:15:39,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:15:39,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:15:39,782 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 08:15:39,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:15:39,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:39,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:39,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:39,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash 421025206, now seen corresponding path program 1 times [2023-08-04 08:15:39,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:39,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025186687] [2023-08-04 08:15:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:39,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:15:40,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:40,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025186687] [2023-08-04 08:15:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025186687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:40,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:15:40,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:15:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491533452] [2023-08-04 08:15:40,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:40,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:40,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:15:40,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 535 [2023-08-04 08:15:40,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:40,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 535 [2023-08-04 08:15:40,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:40,311 INFO L124 PetriNetUnfolderBase]: 1282/1985 cut-off events. [2023-08-04 08:15:40,311 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-04 08:15:40,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3997 conditions, 1985 events. 1282/1985 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8594 event pairs, 432 based on Foata normal form. 0/1464 useless extension candidates. Maximal degree in co-relation 3626. Up to 1936 conditions per place. [2023-08-04 08:15:40,321 INFO L140 encePairwiseOnDemand]: 531/535 looper letters, 47 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-04 08:15:40,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 230 flow [2023-08-04 08:15:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-04 08:15:40,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46417445482866043 [2023-08-04 08:15:40,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-04 08:15:40,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-04 08:15:40,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:40,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-04 08:15:40,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,354 INFO L175 Difference]: Start difference. First operand has 41 places, 46 transitions, 114 flow. Second operand 3 states and 745 transitions. [2023-08-04 08:15:40,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 230 flow [2023-08-04 08:15:40,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:15:40,359 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 112 flow [2023-08-04 08:15:40,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-04 08:15:40,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 08:15:40,364 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 112 flow [2023-08-04 08:15:40,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:40,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:40,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:15:40,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:40,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash -472795362, now seen corresponding path program 1 times [2023-08-04 08:15:40,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:40,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68124197] [2023-08-04 08:15:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:40,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:15:40,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:40,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68124197] [2023-08-04 08:15:40,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68124197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259742151] [2023-08-04 08:15:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:40,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:40,473 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) [2023-08-04 08:15:40,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:15:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:40,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:40,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:15:40,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:40,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259742151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:40,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:40,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681845167] [2023-08-04 08:15:40,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:40,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:40,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:40,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 535 [2023-08-04 08:15:40,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 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) [2023-08-04 08:15:40,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:40,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 535 [2023-08-04 08:15:40,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:40,839 INFO L124 PetriNetUnfolderBase]: 1275/1969 cut-off events. [2023-08-04 08:15:40,839 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 08:15:40,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3984 conditions, 1969 events. 1275/1969 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8880 event pairs, 445 based on Foata normal form. 0/1465 useless extension candidates. Maximal degree in co-relation 3917. Up to 1791 conditions per place. [2023-08-04 08:15:40,847 INFO L140 encePairwiseOnDemand]: 532/535 looper letters, 55 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2023-08-04 08:15:40,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 262 flow [2023-08-04 08:15:40,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-04 08:15:40,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685358255451713 [2023-08-04 08:15:40,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-04 08:15:40,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-04 08:15:40,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:40,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-04 08:15:40,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:40,864 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 112 flow. Second operand 3 states and 752 transitions. [2023-08-04 08:15:40,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 262 flow [2023-08-04 08:15:40,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:15:40,868 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 110 flow [2023-08-04 08:15:40,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-08-04 08:15:40,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-04 08:15:40,869 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 110 flow [2023-08-04 08:15:40,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 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) [2023-08-04 08:15:40,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:40,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:40,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:41,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:41,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:41,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:41,079 INFO L85 PathProgramCache]: Analyzing trace with hash -925052016, now seen corresponding path program 1 times [2023-08-04 08:15:41,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:41,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328270160] [2023-08-04 08:15:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:15:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328270160] [2023-08-04 08:15:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328270160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651490938] [2023-08-04 08:15:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:41,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:41,144 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) [2023-08-04 08:15:41,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:15:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:41,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:41,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:15:41,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651490938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:41,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619425451] [2023-08-04 08:15:41,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:41,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:41,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 535 [2023-08-04 08:15:41,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:41,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 535 [2023-08-04 08:15:41,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:41,400 INFO L124 PetriNetUnfolderBase]: 685/1106 cut-off events. [2023-08-04 08:15:41,400 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2023-08-04 08:15:41,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 1106 events. 685/1106 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4314 event pairs, 318 based on Foata normal form. 0/893 useless extension candidates. Maximal degree in co-relation 1994. Up to 739 conditions per place. [2023-08-04 08:15:41,404 INFO L140 encePairwiseOnDemand]: 532/535 looper letters, 59 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 08:15:41,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 63 transitions, 276 flow [2023-08-04 08:15:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-08-04 08:15:41,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470404984423676 [2023-08-04 08:15:41,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-08-04 08:15:41,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-08-04 08:15:41,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:41,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-08-04 08:15:41,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,413 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 110 flow. Second operand 3 states and 755 transitions. [2023-08-04 08:15:41,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 63 transitions, 276 flow [2023-08-04 08:15:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:15:41,415 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 118 flow [2023-08-04 08:15:41,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-08-04 08:15:41,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-04 08:15:41,416 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 118 flow [2023-08-04 08:15:41,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:41,416 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] [2023-08-04 08:15:41,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:41,622 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,SelfDestructingSolverStorable2 [2023-08-04 08:15:41,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:41,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:41,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1898484883, now seen corresponding path program 1 times [2023-08-04 08:15:41,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:41,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137767443] [2023-08-04 08:15:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:15:41,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:41,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137767443] [2023-08-04 08:15:41,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137767443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:41,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826291855] [2023-08-04 08:15:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:41,705 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) [2023-08-04 08:15:41,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:15:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:41,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:41,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:15:41,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:41,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826291855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:41,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:41,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:41,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071352455] [2023-08-04 08:15:41,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:41,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:41,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:41,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 535 [2023-08-04 08:15:41,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:41,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 535 [2023-08-04 08:15:41,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:41,945 INFO L124 PetriNetUnfolderBase]: 636/1017 cut-off events. [2023-08-04 08:15:41,945 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-08-04 08:15:41,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 1017 events. 636/1017 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3770 event pairs, 439 based on Foata normal form. 0/845 useless extension candidates. Maximal degree in co-relation 1869. Up to 938 conditions per place. [2023-08-04 08:15:41,949 INFO L140 encePairwiseOnDemand]: 532/535 looper letters, 55 selfloop transitions, 2 changer transitions 2/61 dead transitions. [2023-08-04 08:15:41,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 270 flow [2023-08-04 08:15:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-04 08:15:41,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685358255451713 [2023-08-04 08:15:41,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-04 08:15:41,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-04 08:15:41,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:41,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-04 08:15:41,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,958 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 118 flow. Second operand 3 states and 752 transitions. [2023-08-04 08:15:41,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 270 flow [2023-08-04 08:15:41,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:15:41,960 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 120 flow [2023-08-04 08:15:41,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-04 08:15:41,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 08:15:41,961 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 120 flow [2023-08-04 08:15:41,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:41,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:41,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:41,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:42,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:42,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:42,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1518220895, now seen corresponding path program 1 times [2023-08-04 08:15:42,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:42,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660118334] [2023-08-04 08:15:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:15:42,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:42,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660118334] [2023-08-04 08:15:42,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660118334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:42,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739619946] [2023-08-04 08:15:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:42,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:42,244 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) [2023-08-04 08:15:42,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:15:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:42,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:15:42,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:15:42,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:15:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:15:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739619946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:15:42,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:15:42,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:15:42,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327337722] [2023-08-04 08:15:42,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:15:42,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:15:42,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:42,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:15:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:42,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 535 [2023-08-04 08:15:42,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:42,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:42,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 535 [2023-08-04 08:15:42,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:42,445 INFO L124 PetriNetUnfolderBase]: 20/45 cut-off events. [2023-08-04 08:15:42,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:15:42,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 45 events. 20/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 7/45 useless extension candidates. Maximal degree in co-relation 98. Up to 30 conditions per place. [2023-08-04 08:15:42,446 INFO L140 encePairwiseOnDemand]: 532/535 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-08-04 08:15:42,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 25 transitions, 104 flow [2023-08-04 08:15:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:15:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:15:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 946 transitions. [2023-08-04 08:15:42,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44205607476635517 [2023-08-04 08:15:42,448 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 946 transitions. [2023-08-04 08:15:42,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 946 transitions. [2023-08-04 08:15:42,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:42,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 946 transitions. [2023-08-04 08:15:42,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 236.5) internal successors, (946), 4 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:42,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 535.0) internal successors, (2675), 5 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:42,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 535.0) internal successors, (2675), 5 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:42,455 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 120 flow. Second operand 4 states and 946 transitions. [2023-08-04 08:15:42,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 25 transitions, 104 flow [2023-08-04 08:15:42,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:15:42,456 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 08:15:42,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 08:15:42,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -19 predicate places. [2023-08-04 08:15:42,457 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 08:15:42,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:42,460 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:15:42,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:42,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:42,666 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:15:42,668 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:15:42,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:42,709 INFO L124 PetriNetUnfolderBase]: 57/471 cut-off events. [2023-08-04 08:15:42,709 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:15:42,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 471 events. 57/471 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1814 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-04 08:15:42,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:42,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:42,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:15:42,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:42,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:42,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:15:42,749 INFO L124 PetriNetUnfolderBase]: 57/471 cut-off events. [2023-08-04 08:15:42,749 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:15:42,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 471 events. 57/471 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1814 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-04 08:15:42,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 15664 [2023-08-04 08:15:47,760 INFO L134 LiptonReduction]: Checked pairs total: 20577 [2023-08-04 08:15:47,761 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-04 08:15:47,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:15:47,763 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=true, 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;@75ff7af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:15:47,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:15:47,767 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:15:47,767 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-08-04 08:15:47,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:15:47,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:47,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:47,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:15:47,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1822793289, now seen corresponding path program 1 times [2023-08-04 08:15:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:47,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095327585] [2023-08-04 08:15:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:47,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:15:47,801 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:15:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:15:47,828 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:15:47,828 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:15:47,828 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:15:47,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:15:47,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:15:47,829 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:15:47,829 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:15:47,830 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:15:47,830 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:15:47,863 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:15:47,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 08:15:48,065 INFO L124 PetriNetUnfolderBase]: 197/1360 cut-off events. [2023-08-04 08:15:48,065 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:15:48,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 1360 events. 197/1360 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 8109 event pairs, 2 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 820. Up to 32 conditions per place. [2023-08-04 08:15:48,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 08:15:48,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 355 transitions, 758 flow [2023-08-04 08:15:48,087 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:15:48,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 355 transitions, 758 flow [2023-08-04 08:15:48,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 355 transitions, 758 flow [2023-08-04 08:15:48,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 08:15:48,257 INFO L124 PetriNetUnfolderBase]: 197/1360 cut-off events. [2023-08-04 08:15:48,257 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:15:48,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 1360 events. 197/1360 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 8109 event pairs, 2 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 820. Up to 32 conditions per place. [2023-08-04 08:15:48,323 INFO L119 LiptonReduction]: Number of co-enabled transitions 48576 [2023-08-04 08:15:54,520 INFO L134 LiptonReduction]: Checked pairs total: 75051 [2023-08-04 08:15:54,520 INFO L136 LiptonReduction]: Total number of compositions: 366 [2023-08-04 08:15:54,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:15:54,527 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=true, 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;@75ff7af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:15:54,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:15:54,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:15:54,529 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-08-04 08:15:54,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:15:54,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:54,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:54,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:54,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1250713693, now seen corresponding path program 1 times [2023-08-04 08:15:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679395444] [2023-08-04 08:15:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:15:54,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:54,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679395444] [2023-08-04 08:15:54,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679395444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:54,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:15:54,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:15:54,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255009426] [2023-08-04 08:15:54,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:54,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:54,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:15:54,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 721 [2023-08-04 08:15:54,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 72 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:54,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:54,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 721 [2023-08-04 08:15:54,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:06,063 INFO L124 PetriNetUnfolderBase]: 145992/186567 cut-off events. [2023-08-04 08:16:06,063 INFO L125 PetriNetUnfolderBase]: For 9506/9506 co-relation queries the response was YES. [2023-08-04 08:16:06,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374594 conditions, 186567 events. 145992/186567 cut-off events. For 9506/9506 co-relation queries the response was YES. Maximal size of possible extension queue 4089. Compared 1041781 event pairs, 77682 based on Foata normal form. 3584/142311 useless extension candidates. Maximal degree in co-relation 65202. Up to 182470 conditions per place. [2023-08-04 08:16:06,915 INFO L140 encePairwiseOnDemand]: 716/721 looper letters, 70 selfloop transitions, 2 changer transitions 2/80 dead transitions. [2023-08-04 08:16:06,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 352 flow [2023-08-04 08:16:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:16:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:16:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1014 transitions. [2023-08-04 08:16:06,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46879334257975036 [2023-08-04 08:16:06,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1014 transitions. [2023-08-04 08:16:06,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1014 transitions. [2023-08-04 08:16:06,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:06,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1014 transitions. [2023-08-04 08:16:06,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:06,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:06,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:06,938 INFO L175 Difference]: Start difference. First operand has 62 places, 72 transitions, 192 flow. Second operand 3 states and 1014 transitions. [2023-08-04 08:16:06,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 352 flow [2023-08-04 08:16:06,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:16:06,948 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 188 flow [2023-08-04 08:16:06,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-08-04 08:16:06,948 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-04 08:16:06,948 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 188 flow [2023-08-04 08:16:06,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:06,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:06,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:16:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:16:06,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:06,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 258376840, now seen corresponding path program 1 times [2023-08-04 08:16:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097900612] [2023-08-04 08:16:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:16:07,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097900612] [2023-08-04 08:16:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097900612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660754754] [2023-08-04 08:16:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:07,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:07,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:07,003 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) [2023-08-04 08:16:07,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:16:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:07,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:16:07,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:16:07,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:16:07,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660754754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:16:07,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:16:07,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:16:07,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802487157] [2023-08-04 08:16:07,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:16:07,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:16:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:16:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:07,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 721 [2023-08-04 08:16:07,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:07,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:07,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 721 [2023-08-04 08:16:07,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:17,801 INFO L124 PetriNetUnfolderBase]: 145936/187610 cut-off events. [2023-08-04 08:16:17,802 INFO L125 PetriNetUnfolderBase]: For 8122/8122 co-relation queries the response was YES. [2023-08-04 08:16:18,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375017 conditions, 187610 events. 145936/187610 cut-off events. For 8122/8122 co-relation queries the response was YES. Maximal size of possible extension queue 4223. Compared 1066388 event pairs, 78730 based on Foata normal form. 0/139790 useless extension candidates. Maximal degree in co-relation 374947. Up to 180905 conditions per place. [2023-08-04 08:16:18,764 INFO L140 encePairwiseOnDemand]: 718/721 looper letters, 86 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 08:16:18,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 414 flow [2023-08-04 08:16:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:16:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:16:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-08-04 08:16:18,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47480351363846507 [2023-08-04 08:16:18,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-08-04 08:16:18,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-08-04 08:16:18,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:18,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-08-04 08:16:18,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:18,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:18,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:18,775 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 188 flow. Second operand 3 states and 1027 transitions. [2023-08-04 08:16:18,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 414 flow [2023-08-04 08:16:18,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 94 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:16:18,799 INFO L231 Difference]: Finished difference. Result has 62 places, 70 transitions, 192 flow [2023-08-04 08:16:18,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=62, PETRI_TRANSITIONS=70} [2023-08-04 08:16:18,800 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-08-04 08:16:18,800 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 70 transitions, 192 flow [2023-08-04 08:16:18,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:18,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:18,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:16:18,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:16:19,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:19,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:19,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1393343433, now seen corresponding path program 1 times [2023-08-04 08:16:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:19,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764500198] [2023-08-04 08:16:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:19,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:16:19,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764500198] [2023-08-04 08:16:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764500198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077143927] [2023-08-04 08:16:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:19,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:19,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:19,061 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) [2023-08-04 08:16:19,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:16:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:19,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:16:19,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:16:19,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:16:19,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077143927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:16:19,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:16:19,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:16:19,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545953010] [2023-08-04 08:16:19,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:16:19,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:16:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:16:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:19,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 721 [2023-08-04 08:16:19,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:19,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:19,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 721 [2023-08-04 08:16:19,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:25,970 INFO L124 PetriNetUnfolderBase]: 97638/128208 cut-off events. [2023-08-04 08:16:25,971 INFO L125 PetriNetUnfolderBase]: For 7888/7888 co-relation queries the response was YES. [2023-08-04 08:16:26,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261772 conditions, 128208 events. 97638/128208 cut-off events. For 7888/7888 co-relation queries the response was YES. Maximal size of possible extension queue 2522. Compared 742231 event pairs, 50129 based on Foata normal form. 0/99455 useless extension candidates. Maximal degree in co-relation 87502. Up to 89310 conditions per place. [2023-08-04 08:16:26,692 INFO L140 encePairwiseOnDemand]: 718/721 looper letters, 99 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 08:16:26,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 107 transitions, 478 flow [2023-08-04 08:16:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:16:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:16:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1039 transitions. [2023-08-04 08:16:26,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803513638465095 [2023-08-04 08:16:26,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1039 transitions. [2023-08-04 08:16:26,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1039 transitions. [2023-08-04 08:16:26,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:26,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1039 transitions. [2023-08-04 08:16:26,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 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) [2023-08-04 08:16:26,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:26,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:26,702 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 192 flow. Second operand 3 states and 1039 transitions. [2023-08-04 08:16:26,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 107 transitions, 478 flow [2023-08-04 08:16:26,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 107 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:16:26,714 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 202 flow [2023-08-04 08:16:26,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2023-08-04 08:16:26,715 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-04 08:16:26,715 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 202 flow [2023-08-04 08:16:26,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:26,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:26,716 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] [2023-08-04 08:16:26,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:16:26,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:26,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:26,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash -33108217, now seen corresponding path program 1 times [2023-08-04 08:16:26,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:26,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686469291] [2023-08-04 08:16:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:26,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:16:26,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:26,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686469291] [2023-08-04 08:16:26,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686469291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:26,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506034372] [2023-08-04 08:16:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:26,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:26,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:26,993 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) [2023-08-04 08:16:26,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:16:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:27,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:16:27,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:16:27,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:16:27,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506034372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:16:27,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:16:27,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:16:27,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580057825] [2023-08-04 08:16:27,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:16:27,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:16:27,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:27,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:16:27,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:27,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 721 [2023-08-04 08:16:27,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:27,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:27,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 721 [2023-08-04 08:16:27,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:33,187 INFO L124 PetriNetUnfolderBase]: 86106/112162 cut-off events. [2023-08-04 08:16:33,187 INFO L125 PetriNetUnfolderBase]: For 23436/23436 co-relation queries the response was YES. [2023-08-04 08:16:33,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238338 conditions, 112162 events. 86106/112162 cut-off events. For 23436/23436 co-relation queries the response was YES. Maximal size of possible extension queue 2311. Compared 617178 event pairs, 54993 based on Foata normal form. 0/88991 useless extension candidates. Maximal degree in co-relation 86883. Up to 95433 conditions per place. [2023-08-04 08:16:33,785 INFO L140 encePairwiseOnDemand]: 718/721 looper letters, 100 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2023-08-04 08:16:33,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 108 transitions, 490 flow [2023-08-04 08:16:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:16:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:16:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1039 transitions. [2023-08-04 08:16:33,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803513638465095 [2023-08-04 08:16:33,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1039 transitions. [2023-08-04 08:16:33,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1039 transitions. [2023-08-04 08:16:33,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:33,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1039 transitions. [2023-08-04 08:16:33,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 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) [2023-08-04 08:16:33,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:33,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:33,795 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 202 flow. Second operand 3 states and 1039 transitions. [2023-08-04 08:16:33,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 108 transitions, 490 flow [2023-08-04 08:16:34,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:16:34,140 INFO L231 Difference]: Finished difference. Result has 66 places, 72 transitions, 212 flow [2023-08-04 08:16:34,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=66, PETRI_TRANSITIONS=72} [2023-08-04 08:16:34,140 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2023-08-04 08:16:34,141 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 72 transitions, 212 flow [2023-08-04 08:16:34,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:34,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:34,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:16:34,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:16:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:34,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:34,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1061864003, now seen corresponding path program 1 times [2023-08-04 08:16:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:34,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312354050] [2023-08-04 08:16:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:34,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:16:34,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:34,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312354050] [2023-08-04 08:16:34,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312354050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:34,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597386936] [2023-08-04 08:16:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:34,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:34,412 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) [2023-08-04 08:16:34,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:16:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:34,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:16:34,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:16:34,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:16:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:16:34,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597386936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:16:34,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:16:34,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:16:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196279818] [2023-08-04 08:16:34,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:16:34,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:16:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:16:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:34,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 721 [2023-08-04 08:16:34,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 72 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:34,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:34,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 721 [2023-08-04 08:16:34,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:40,306 INFO L124 PetriNetUnfolderBase]: 80447/104463 cut-off events. [2023-08-04 08:16:40,306 INFO L125 PetriNetUnfolderBase]: For 17683/17683 co-relation queries the response was YES. [2023-08-04 08:16:40,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222808 conditions, 104463 events. 80447/104463 cut-off events. For 17683/17683 co-relation queries the response was YES. Maximal size of possible extension queue 2231. Compared 566406 event pairs, 27332 based on Foata normal form. 7/83087 useless extension candidates. Maximal degree in co-relation 179392. Up to 101754 conditions per place. [2023-08-04 08:16:40,718 INFO L140 encePairwiseOnDemand]: 717/721 looper letters, 88 selfloop transitions, 3 changer transitions 1/98 dead transitions. [2023-08-04 08:16:40,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 448 flow [2023-08-04 08:16:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:16:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:16:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1338 transitions. [2023-08-04 08:16:40,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46393897364771153 [2023-08-04 08:16:40,721 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1338 transitions. [2023-08-04 08:16:40,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1338 transitions. [2023-08-04 08:16:40,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:40,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1338 transitions. [2023-08-04 08:16:40,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:40,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:40,729 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:40,729 INFO L175 Difference]: Start difference. First operand has 66 places, 72 transitions, 212 flow. Second operand 4 states and 1338 transitions. [2023-08-04 08:16:40,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 448 flow [2023-08-04 08:16:41,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:16:41,599 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 224 flow [2023-08-04 08:16:41,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2023-08-04 08:16:41,600 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2023-08-04 08:16:41,600 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 224 flow [2023-08-04 08:16:41,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:41,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:41,601 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, 1, 1, 1, 1, 1] [2023-08-04 08:16:41,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:16:41,806 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,SelfDestructingSolverStorable10 [2023-08-04 08:16:41,806 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:41,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2134710431, now seen corresponding path program 1 times [2023-08-04 08:16:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826296764] [2023-08-04 08:16:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:16:41,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:41,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826296764] [2023-08-04 08:16:41,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826296764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:41,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144170622] [2023-08-04 08:16:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:41,859 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) [2023-08-04 08:16:41,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:16:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:41,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:16:41,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:16:41,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:16:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:16:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144170622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:16:41,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:16:41,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:16:41,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882815465] [2023-08-04 08:16:41,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:16:41,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:16:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:16:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:41,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 721 [2023-08-04 08:16:41,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:41,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:41,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 721 [2023-08-04 08:16:41,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:47,677 INFO L124 PetriNetUnfolderBase]: 77866/101277 cut-off events. [2023-08-04 08:16:47,677 INFO L125 PetriNetUnfolderBase]: For 9099/9099 co-relation queries the response was YES. [2023-08-04 08:16:48,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215281 conditions, 101277 events. 77866/101277 cut-off events. For 9099/9099 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 549460 event pairs, 23608 based on Foata normal form. 294/81016 useless extension candidates. Maximal degree in co-relation 172165. Up to 73454 conditions per place. [2023-08-04 08:16:48,272 INFO L140 encePairwiseOnDemand]: 717/721 looper letters, 118 selfloop transitions, 3 changer transitions 1/128 dead transitions. [2023-08-04 08:16:48,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 128 transitions, 580 flow [2023-08-04 08:16:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:16:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:16:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1368 transitions. [2023-08-04 08:16:48,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47434119278779474 [2023-08-04 08:16:48,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1368 transitions. [2023-08-04 08:16:48,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1368 transitions. [2023-08-04 08:16:48,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:48,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1368 transitions. [2023-08-04 08:16:48,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:48,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:48,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:48,283 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 224 flow. Second operand 4 states and 1368 transitions. [2023-08-04 08:16:48,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 128 transitions, 580 flow [2023-08-04 08:16:49,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 128 transitions, 571 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:16:49,424 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 229 flow [2023-08-04 08:16:49,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-08-04 08:16:49,425 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2023-08-04 08:16:49,425 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 229 flow [2023-08-04 08:16:49,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:49,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:49,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1] [2023-08-04 08:16:49,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:16:49,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:49,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:49,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1766695419, now seen corresponding path program 1 times [2023-08-04 08:16:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77506239] [2023-08-04 08:16:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:16:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77506239] [2023-08-04 08:16:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77506239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768264052] [2023-08-04 08:16:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:49,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:49,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:49,693 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) [2023-08-04 08:16:49,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:16:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:49,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:16:49,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:16:49,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:16:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:16:49,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768264052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:16:49,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:16:49,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:16:49,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91275016] [2023-08-04 08:16:49,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:16:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:16:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:16:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:49,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 721 [2023-08-04 08:16:49,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:49,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:49,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 721 [2023-08-04 08:16:49,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:53,933 INFO L124 PetriNetUnfolderBase]: 55820/72576 cut-off events. [2023-08-04 08:16:53,933 INFO L125 PetriNetUnfolderBase]: For 29156/29156 co-relation queries the response was YES. [2023-08-04 08:16:54,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161051 conditions, 72576 events. 55820/72576 cut-off events. For 29156/29156 co-relation queries the response was YES. Maximal size of possible extension queue 1706. Compared 383424 event pairs, 16190 based on Foata normal form. 1225/58811 useless extension candidates. Maximal degree in co-relation 155588. Up to 28889 conditions per place. [2023-08-04 08:16:54,223 INFO L140 encePairwiseOnDemand]: 717/721 looper letters, 130 selfloop transitions, 4 changer transitions 0/140 dead transitions. [2023-08-04 08:16:54,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 140 transitions, 642 flow [2023-08-04 08:16:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:16:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:16:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2023-08-04 08:16:54,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478502080443828 [2023-08-04 08:16:54,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2023-08-04 08:16:54,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2023-08-04 08:16:54,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:54,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2023-08-04 08:16:54,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:54,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:54,233 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:54,233 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 229 flow. Second operand 4 states and 1380 transitions. [2023-08-04 08:16:54,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 140 transitions, 642 flow [2023-08-04 08:16:54,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 140 transitions, 632 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:16:54,477 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 240 flow [2023-08-04 08:16:54,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2023-08-04 08:16:54,477 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2023-08-04 08:16:54,478 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 240 flow [2023-08-04 08:16:54,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:54,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:54,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:16:54,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:16:54,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:16:54,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:54,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1296781576, now seen corresponding path program 1 times [2023-08-04 08:16:54,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:54,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744049513] [2023-08-04 08:16:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:54,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:16:54,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:54,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744049513] [2023-08-04 08:16:54,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744049513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:54,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854447312] [2023-08-04 08:16:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:54,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:54,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:54,789 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) [2023-08-04 08:16:54,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:16:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:54,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:16:54,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:16:54,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:16:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:16:54,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854447312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:16:54,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:16:54,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:16:54,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59728907] [2023-08-04 08:16:54,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:16:54,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:16:54,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:16:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:54,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 721 [2023-08-04 08:16:54,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 318.8) internal successors, (1594), 5 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:54,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:54,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 721 [2023-08-04 08:16:54,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:16:59,447 INFO L124 PetriNetUnfolderBase]: 55727/72376 cut-off events. [2023-08-04 08:16:59,447 INFO L125 PetriNetUnfolderBase]: For 38086/38086 co-relation queries the response was YES. [2023-08-04 08:16:59,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166145 conditions, 72376 events. 55727/72376 cut-off events. For 38086/38086 co-relation queries the response was YES. Maximal size of possible extension queue 1706. Compared 379438 event pairs, 39753 based on Foata normal form. 28/57438 useless extension candidates. Maximal degree in co-relation 160803. Up to 68175 conditions per place. [2023-08-04 08:16:59,729 INFO L140 encePairwiseOnDemand]: 717/721 looper letters, 130 selfloop transitions, 3 changer transitions 2/141 dead transitions. [2023-08-04 08:16:59,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 141 transitions, 654 flow [2023-08-04 08:16:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:16:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:16:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2023-08-04 08:16:59,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478502080443828 [2023-08-04 08:16:59,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2023-08-04 08:16:59,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2023-08-04 08:16:59,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:16:59,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2023-08-04 08:16:59,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:59,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:59,738 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:16:59,738 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 240 flow. Second operand 4 states and 1380 transitions. [2023-08-04 08:16:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 141 transitions, 654 flow [2023-08-04 08:17:00,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 141 transitions, 650 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:17:00,267 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 244 flow [2023-08-04 08:17:00,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-04 08:17:00,267 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 16 predicate places. [2023-08-04 08:17:00,267 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 244 flow [2023-08-04 08:17:00,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.8) internal successors, (1594), 5 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:00,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:00,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:00,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:17:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:17:00,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:00,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash -668674596, now seen corresponding path program 1 times [2023-08-04 08:17:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:00,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735549231] [2023-08-04 08:17:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:00,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:17:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735549231] [2023-08-04 08:17:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735549231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286118757] [2023-08-04 08:17:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:00,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:00,918 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) [2023-08-04 08:17:00,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:17:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:01,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 08:17:01,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:17:01,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:17:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:17:01,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286118757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:17:01,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:17:01,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-04 08:17:01,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441178269] [2023-08-04 08:17:01,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:17:01,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:17:01,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:01,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:17:01,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:17:02,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 721 [2023-08-04 08:17:02,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 244 flow. Second operand has 13 states, 13 states have (on average 295.2307692307692) internal successors, (3838), 13 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:02,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:02,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 721 [2023-08-04 08:17:02,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:20,241 INFO L124 PetriNetUnfolderBase]: 210711/274769 cut-off events. [2023-08-04 08:17:20,241 INFO L125 PetriNetUnfolderBase]: For 133871/133871 co-relation queries the response was YES. [2023-08-04 08:17:20,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627511 conditions, 274769 events. 210711/274769 cut-off events. For 133871/133871 co-relation queries the response was YES. Maximal size of possible extension queue 6105. Compared 1714356 event pairs, 114764 based on Foata normal form. 1/218357 useless extension candidates. Maximal degree in co-relation 625810. Up to 69053 conditions per place. [2023-08-04 08:17:21,800 INFO L140 encePairwiseOnDemand]: 707/721 looper letters, 315 selfloop transitions, 24 changer transitions 3/348 dead transitions. [2023-08-04 08:17:21,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 348 transitions, 1947 flow [2023-08-04 08:17:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 08:17:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 08:17:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3230 transitions. [2023-08-04 08:17:21,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44798890429958393 [2023-08-04 08:17:21,805 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3230 transitions. [2023-08-04 08:17:21,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3230 transitions. [2023-08-04 08:17:21,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:21,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3230 transitions. [2023-08-04 08:17:21,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 323.0) internal successors, (3230), 10 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:21,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 721.0) internal successors, (7931), 11 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:21,819 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 721.0) internal successors, (7931), 11 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:21,819 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 244 flow. Second operand 10 states and 3230 transitions. [2023-08-04 08:17:21,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 348 transitions, 1947 flow [2023-08-04 08:17:33,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 348 transitions, 1905 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-04 08:17:33,613 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 418 flow [2023-08-04 08:17:33,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=418, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-08-04 08:17:33,613 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 29 predicate places. [2023-08-04 08:17:33,614 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 418 flow [2023-08-04 08:17:33,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 295.2307692307692) internal successors, (3838), 13 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:33,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:33,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:33,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:17:33,820 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,SelfDestructingSolverStorable14 [2023-08-04 08:17:33,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:33,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:33,821 INFO L85 PathProgramCache]: Analyzing trace with hash -943298114, now seen corresponding path program 1 times [2023-08-04 08:17:33,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:33,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646895656] [2023-08-04 08:17:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:33,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:17:34,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:34,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646895656] [2023-08-04 08:17:34,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646895656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:34,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614059569] [2023-08-04 08:17:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:34,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:34,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:34,102 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) [2023-08-04 08:17:34,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:17:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:34,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-04 08:17:34,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:17:34,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:17:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:17:34,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614059569] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:17:34,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:17:34,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-04 08:17:34,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139492352] [2023-08-04 08:17:34,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:17:34,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 08:17:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 08:17:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-04 08:17:35,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 721 [2023-08-04 08:17:35,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 418 flow. Second operand has 17 states, 17 states have (on average 267.4117647058824) internal successors, (4546), 17 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:35,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:35,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 721 [2023-08-04 08:17:35,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:18:15,500 INFO L124 PetriNetUnfolderBase]: 390243/509802 cut-off events. [2023-08-04 08:18:15,501 INFO L125 PetriNetUnfolderBase]: For 559680/559680 co-relation queries the response was YES. [2023-08-04 08:18:17,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1386171 conditions, 509802 events. 390243/509802 cut-off events. For 559680/559680 co-relation queries the response was YES. Maximal size of possible extension queue 11537. Compared 3397434 event pairs, 224871 based on Foata normal form. 1/405087 useless extension candidates. Maximal degree in co-relation 1382806. Up to 267744 conditions per place. [2023-08-04 08:18:18,781 INFO L140 encePairwiseOnDemand]: 706/721 looper letters, 312 selfloop transitions, 21 changer transitions 3/342 dead transitions. [2023-08-04 08:18:18,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 342 transitions, 2100 flow [2023-08-04 08:18:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 08:18:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 08:18:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3445 transitions. [2023-08-04 08:18:18,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39817383263985207 [2023-08-04 08:18:18,787 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3445 transitions. [2023-08-04 08:18:18,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3445 transitions. [2023-08-04 08:18:18,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:18:18,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3445 transitions. [2023-08-04 08:18:18,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 287.0833333333333) internal successors, (3445), 12 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:18:18,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 721.0) internal successors, (9373), 13 states have internal predecessors, (9373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:18:18,803 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 721.0) internal successors, (9373), 13 states have internal predecessors, (9373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:18:18,803 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 418 flow. Second operand 12 states and 3445 transitions. [2023-08-04 08:18:18,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 342 transitions, 2100 flow [2023-08-04 08:19:07,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 342 transitions, 2083 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:07,119 INFO L231 Difference]: Finished difference. Result has 106 places, 110 transitions, 599 flow [2023-08-04 08:19:07,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=599, PETRI_PLACES=106, PETRI_TRANSITIONS=110} [2023-08-04 08:19:07,120 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 44 predicate places. [2023-08-04 08:19:07,120 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 110 transitions, 599 flow [2023-08-04 08:19:07,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 267.4117647058824) internal successors, (4546), 17 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:07,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:07,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:07,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:19:07,321 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,SelfDestructingSolverStorable15 [2023-08-04 08:19:07,322 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:07,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1935382394, now seen corresponding path program 2 times [2023-08-04 08:19:07,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:07,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008009186] [2023-08-04 08:19:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:07,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:19:07,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008009186] [2023-08-04 08:19:07,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008009186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375591591] [2023-08-04 08:19:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:19:07,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:07,595 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) [2023-08-04 08:19:07,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:19:07,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:19:07,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:19:07,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:19:07,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:19:07,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:19:08,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375591591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:08,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:08,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-04 08:19:08,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688273987] [2023-08-04 08:19:08,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:08,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 08:19:08,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:08,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 08:19:08,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-04 08:19:08,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 721 [2023-08-04 08:19:08,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 599 flow. Second operand has 16 states, 16 states have (on average 266.8125) internal successors, (4269), 16 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:08,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:08,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 721 [2023-08-04 08:19:08,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand