/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_security.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:49:25,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:49:25,304 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:49:25,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:49:25,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:49:25,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:49:25,311 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:49:25,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:49:25,339 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:49:25,342 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:49:25,343 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:49:25,343 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:49:25,344 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:49:25,345 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:49:25,345 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:49:25,345 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:49:25,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:49:25,346 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:49:25,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:49:25,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:49:25,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:49:25,347 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:49:25,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:49:25,348 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:49:25,348 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:49:25,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:49:25,348 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:49:25,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:49:25,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:49:25,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:49:25,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:49:25,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:49:25,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:49:25,350 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:49:25,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:49:25,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:49:25,352 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:49:25,352 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:49:25,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:49:25,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:49:25,352 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:49:25,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:49:25,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:49:25,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:49:25,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:49:25,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:49:25,580 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:49:25,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_security.wvr_bound2.c [2023-08-04 09:49:26,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:49:26,891 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:49:26,892 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_security.wvr_bound2.c [2023-08-04 09:49:26,898 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5b62c4a/cea298fe8999492f813cfadb3921494c/FLAGb12c90713 [2023-08-04 09:49:26,911 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5b62c4a/cea298fe8999492f813cfadb3921494c [2023-08-04 09:49:26,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:49:26,916 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:49:26,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:49:26,917 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:49:26,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:49:26,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:49:26" (1/1) ... [2023-08-04 09:49:26,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561a81c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:26, skipping insertion in model container [2023-08-04 09:49:26,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:49:26" (1/1) ... [2023-08-04 09:49:26,941 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:49:27,104 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_security.wvr_bound2.c[2093,2106] [2023-08-04 09:49:27,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:49:27,112 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:49:27,128 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_security.wvr_bound2.c[2093,2106] [2023-08-04 09:49:27,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:49:27,140 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:49:27,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27 WrapperNode [2023-08-04 09:49:27,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:49:27,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:49:27,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:49:27,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:49:27,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,169 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-04 09:49:27,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:49:27,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:49:27,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:49:27,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:49:27,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,187 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,188 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:49:27,192 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:49:27,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:49:27,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:49:27,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (1/1) ... [2023-08-04 09:49:27,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:49:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:27,218 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 09:49:27,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:49:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:49:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:49:27,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:49:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:49:27,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:49:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:49:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:49:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:49:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:49:27,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:49:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:49:27,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:49:27,255 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 09:49:27,334 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:49:27,335 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:49:27,468 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:49:27,474 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:49:27,474 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 09:49:27,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:49:27 BoogieIcfgContainer [2023-08-04 09:49:27,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:49:27,478 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:49:27,478 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:49:27,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:49:27,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:49:26" (1/3) ... [2023-08-04 09:49:27,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd8b58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:49:27, skipping insertion in model container [2023-08-04 09:49:27,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:27" (2/3) ... [2023-08-04 09:49:27,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd8b58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:49:27, skipping insertion in model container [2023-08-04 09:49:27,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:49:27" (3/3) ... [2023-08-04 09:49:27,484 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_security.wvr_bound2.c [2023-08-04 09:49:27,490 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:49:27,498 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:49:27,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:49:27,499 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:49:27,544 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:49:27,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:27,663 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-04 09:49:27,663 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:49:27,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-04 09:49:27,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:27,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:27,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:49:27,693 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:27,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:27,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:27,768 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-04 09:49:27,769 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:49:27,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-04 09:49:27,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-04 09:49:30,087 INFO L134 LiptonReduction]: Checked pairs total: 2847 [2023-08-04 09:49:30,087 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 09:49:30,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:49:30,106 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;@7b3cc013, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:49:30,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:49:30,110 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:49:30,110 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 09:49:30,110 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:49:30,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:30,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:49:30,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:30,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 395484469, now seen corresponding path program 1 times [2023-08-04 09:49:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:30,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888137261] [2023-08-04 09:49:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:30,322 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 09:49:30,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:30,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888137261] [2023-08-04 09:49:30,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888137261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:30,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:49:30,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:49:30,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924653794] [2023-08-04 09:49:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:30,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:30,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:49:30,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 208 [2023-08-04 09:49:30,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 09:49:30,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:30,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 208 [2023-08-04 09:49:30,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:30,420 INFO L124 PetriNetUnfolderBase]: 57/150 cut-off events. [2023-08-04 09:49:30,421 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:49:30,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 150 events. 57/150 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 494 event pairs, 21 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 216. Up to 133 conditions per place. [2023-08-04 09:49:30,423 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 20 selfloop transitions, 2 changer transitions 3/27 dead transitions. [2023-08-04 09:49:30,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 122 flow [2023-08-04 09:49:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-04 09:49:30,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-04 09:49:30,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-04 09:49:30,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-04 09:49:30,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:30,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-04 09:49:30,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 09:49:30,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:30,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:30,448 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 74 flow. Second operand 3 states and 304 transitions. [2023-08-04 09:49:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 122 flow [2023-08-04 09:49:30,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:49:30,451 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 72 flow [2023-08-04 09:49:30,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-04 09:49:30,455 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 09:49:30,455 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 72 flow [2023-08-04 09:49:30,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 09:49:30,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:30,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:49:30,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:30,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1850897162, now seen corresponding path program 1 times [2023-08-04 09:49:30,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:30,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318221250] [2023-08-04 09:49:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:30,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:30,519 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 09:49:30,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318221250] [2023-08-04 09:49:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318221250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365067822] [2023-08-04 09:49:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:30,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:30,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:30,524 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 09:49:30,551 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 09:49:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:30,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:30,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:30,601 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 09:49:30,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:30,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365067822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:30,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:30,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:49:30,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235734952] [2023-08-04 09:49:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:30,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:30,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:30,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 208 [2023-08-04 09:49:30,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 09:49:30,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:30,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 208 [2023-08-04 09:49:30,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:30,660 INFO L124 PetriNetUnfolderBase]: 55/144 cut-off events. [2023-08-04 09:49:30,661 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:49:30,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 144 events. 55/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 404 event pairs, 24 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 284. Up to 123 conditions per place. [2023-08-04 09:49:30,662 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 21 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-04 09:49:30,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 126 flow [2023-08-04 09:49:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-04 09:49:30,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-04 09:49:30,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-04 09:49:30,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-04 09:49:30,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:30,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-04 09:49:30,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 09:49:30,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:30,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:30,668 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 72 flow. Second operand 3 states and 304 transitions. [2023-08-04 09:49:30,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 126 flow [2023-08-04 09:49:30,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:49:30,669 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 70 flow [2023-08-04 09:49:30,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-08-04 09:49:30,670 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-08-04 09:49:30,670 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 70 flow [2023-08-04 09:49:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 09:49:30,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:30,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:30,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:49:30,876 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 09:49:30,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:30,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash -849568360, now seen corresponding path program 1 times [2023-08-04 09:49:30,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:30,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524414934] [2023-08-04 09:49:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:30,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:30,969 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 09:49:30,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:30,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524414934] [2023-08-04 09:49:30,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524414934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:30,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769492046] [2023-08-04 09:49:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:30,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:30,972 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 09:49:30,974 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 09:49:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:31,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:31,030 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 09:49:31,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769492046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:31,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:31,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:49:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428259954] [2023-08-04 09:49:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:31,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:31,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 208 [2023-08-04 09:49:31,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:49:31,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:31,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 208 [2023-08-04 09:49:31,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:31,089 INFO L124 PetriNetUnfolderBase]: 37/106 cut-off events. [2023-08-04 09:49:31,090 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:49:31,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 106 events. 37/106 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 239 event pairs, 24 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 117. Up to 79 conditions per place. [2023-08-04 09:49:31,091 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 25 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 09:49:31,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 140 flow [2023-08-04 09:49:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 09:49:31,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49198717948717946 [2023-08-04 09:49:31,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 09:49:31,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 09:49:31,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:31,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 09:49:31,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 09:49:31,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:31,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:31,097 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 70 flow. Second operand 3 states and 307 transitions. [2023-08-04 09:49:31,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 140 flow [2023-08-04 09:49:31,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:49:31,099 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 78 flow [2023-08-04 09:49:31,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-04 09:49:31,101 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-04 09:49:31,101 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 78 flow [2023-08-04 09:49:31,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:49:31,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:31,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:31,108 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 09:49:31,307 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 09:49:31,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:31,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash -603574636, now seen corresponding path program 1 times [2023-08-04 09:49:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:31,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778132195] [2023-08-04 09:49:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,369 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 09:49:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:31,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778132195] [2023-08-04 09:49:31,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778132195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:31,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626440956] [2023-08-04 09:49:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:31,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:31,371 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 09:49:31,396 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 09:49:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:31,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:31,439 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 09:49:31,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:31,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626440956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:31,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:31,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:49:31,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693680438] [2023-08-04 09:49:31,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:31,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:31,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:31,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:31,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:31,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 208 [2023-08-04 09:49:31,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 09:49:31,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:31,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 208 [2023-08-04 09:49:31,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:31,490 INFO L124 PetriNetUnfolderBase]: 34/101 cut-off events. [2023-08-04 09:49:31,490 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-04 09:49:31,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 101 events. 34/101 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 213 event pairs, 29 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 122. Up to 80 conditions per place. [2023-08-04 09:49:31,491 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 21 selfloop transitions, 2 changer transitions 2/27 dead transitions. [2023-08-04 09:49:31,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 134 flow [2023-08-04 09:49:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-04 09:49:31,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-04 09:49:31,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-04 09:49:31,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-04 09:49:31,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:31,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-04 09:49:31,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 09:49:31,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:31,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:49:31,496 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 78 flow. Second operand 3 states and 304 transitions. [2023-08-04 09:49:31,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 134 flow [2023-08-04 09:49:31,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:31,498 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 80 flow [2023-08-04 09:49:31,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-04 09:49:31,498 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 09:49:31,499 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 80 flow [2023-08-04 09:49:31,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 09:49:31,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:31,499 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 09:49:31,505 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 09:49:31,704 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 09:49:31,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:31,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1139995546, now seen corresponding path program 1 times [2023-08-04 09:49:31,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:31,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140847638] [2023-08-04 09:49:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:31,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,756 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 09:49:31,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140847638] [2023-08-04 09:49:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140847638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978605610] [2023-08-04 09:49:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:31,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:31,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:31,758 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 09:49:31,761 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 09:49:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:31,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:31,842 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 09:49:31,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:31,858 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 09:49:31,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978605610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:31,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:31,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:49:31,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887853092] [2023-08-04 09:49:31,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:31,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:31,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:31,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:31,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 208 [2023-08-04 09:49:31,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 09:49:31,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:31,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 208 [2023-08-04 09:49:31,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:31,882 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 09:49:31,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:49:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 09:49:31,882 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 09:49:31,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 32 flow [2023-08-04 09:49:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:49:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:49:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2023-08-04 09:49:31,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2023-08-04 09:49:31,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2023-08-04 09:49:31,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2023-08-04 09:49:31,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:31,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2023-08-04 09:49:31,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 09:49:31,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states 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 09:49:31,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states 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 09:49:31,889 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 80 flow. Second operand 4 states and 376 transitions. [2023-08-04 09:49:31,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 32 flow [2023-08-04 09:49:31,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:31,890 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 09:49:31,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 09:49:31,890 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -12 predicate places. [2023-08-04 09:49:31,890 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 09:49:31,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 09:49:31,893 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:49:31,903 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 09:49:32,098 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 09:49:32,099 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 09:49:32,101 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:49:32,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:32,137 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-04 09:49:32,137 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:49:32,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-04 09:49:32,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:32,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:32,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:49:32,140 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:32,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:32,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 09:49:32,165 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-04 09:49:32,165 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:49:32,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-04 09:49:32,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-04 09:49:34,297 INFO L134 LiptonReduction]: Checked pairs total: 2955 [2023-08-04 09:49:34,298 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 09:49:34,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:49:34,300 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;@7b3cc013, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:49:34,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:49:34,303 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:49:34,303 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 09:49:34,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:49:34,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:34,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:49:34,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:49:34,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1918103189, now seen corresponding path program 1 times [2023-08-04 09:49:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:34,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408775403] [2023-08-04 09:49:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:34,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:49:34,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:49:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:49:34,361 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:49:34,361 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:49:34,362 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:49:34,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:49:34,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 09:49:34,363 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:49:34,367 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:49:34,368 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:49:34,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:49:34,388 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:49:34,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 09:49:34,474 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-04 09:49:34,475 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:49:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 09:49:34,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 09:49:34,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 137 transitions, 322 flow [2023-08-04 09:49:34,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:49:34,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-04 09:49:34,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-04 09:49:34,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 09:49:34,552 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-04 09:49:34,553 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:49:34,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 09:49:34,571 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 09:49:36,466 INFO L134 LiptonReduction]: Checked pairs total: 17865 [2023-08-04 09:49:36,467 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 09:49:36,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:49:36,469 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;@7b3cc013, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:49:36,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:49:36,471 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:49:36,471 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 09:49:36,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:49:36,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:36,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:49:36,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:36,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 740231858, now seen corresponding path program 1 times [2023-08-04 09:49:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753993739] [2023-08-04 09:49:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:36,508 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 09:49:36,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753993739] [2023-08-04 09:49:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753993739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:36,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:49:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:49:36,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311972690] [2023-08-04 09:49:36,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:36,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:36,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:49:36,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-04 09:49:36,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 09:49:36,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:36,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-04 09:49:36,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:38,290 INFO L124 PetriNetUnfolderBase]: 17891/27130 cut-off events. [2023-08-04 09:49:38,290 INFO L125 PetriNetUnfolderBase]: For 2575/2575 co-relation queries the response was YES. [2023-08-04 09:49:38,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52001 conditions, 27130 events. 17891/27130 cut-off events. For 2575/2575 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 186966 event pairs, 10640 based on Foata normal form. 0/21326 useless extension candidates. Maximal degree in co-relation 10766. Up to 23131 conditions per place. [2023-08-04 09:49:38,592 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 44 selfloop transitions, 2 changer transitions 1/59 dead transitions. [2023-08-04 09:49:38,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 258 flow [2023-08-04 09:49:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-04 09:49:38,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2023-08-04 09:49:38,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-04 09:49:38,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-04 09:49:38,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:38,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-04 09:49:38,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 09:49:38,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:38,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:38,598 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 154 flow. Second operand 3 states and 393 transitions. [2023-08-04 09:49:38,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 258 flow [2023-08-04 09:49:38,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:49:38,605 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 158 flow [2023-08-04 09:49:38,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-04 09:49:38,606 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 09:49:38,606 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 158 flow [2023-08-04 09:49:38,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 09:49:38,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:38,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:38,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:49:38,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:38,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -63866721, now seen corresponding path program 1 times [2023-08-04 09:49:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:38,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616190255] [2023-08-04 09:49:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:38,653 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 09:49:38,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:38,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616190255] [2023-08-04 09:49:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616190255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:38,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479984990] [2023-08-04 09:49:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:38,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:38,655 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 09:49:38,657 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 09:49:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:38,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:38,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:38,718 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 09:49:38,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:38,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479984990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:38,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:38,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:49:38,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388734204] [2023-08-04 09:49:38,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:38,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:38,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:38,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-04 09:49:38,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 09:49:38,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:38,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-04 09:49:38,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:40,382 INFO L124 PetriNetUnfolderBase]: 17711/26712 cut-off events. [2023-08-04 09:49:40,383 INFO L125 PetriNetUnfolderBase]: For 2187/2187 co-relation queries the response was YES. [2023-08-04 09:49:40,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51606 conditions, 26712 events. 17711/26712 cut-off events. For 2187/2187 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 183001 event pairs, 10999 based on Foata normal form. 0/21058 useless extension candidates. Maximal degree in co-relation 51557. Up to 22724 conditions per place. [2023-08-04 09:49:40,520 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 51 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 09:49:40,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 290 flow [2023-08-04 09:49:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-04 09:49:40,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669515669515669 [2023-08-04 09:49:40,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-04 09:49:40,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-04 09:49:40,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:40,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-04 09:49:40,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 09:49:40,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:40,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:40,534 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 158 flow. Second operand 3 states and 398 transitions. [2023-08-04 09:49:40,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 290 flow [2023-08-04 09:49:40,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:49:40,539 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 165 flow [2023-08-04 09:49:40,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-08-04 09:49:40,540 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 09:49:40,540 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 165 flow [2023-08-04 09:49:40,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 09:49:40,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:40,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:40,548 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 09:49:40,748 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 09:49:40,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:40,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1748179637, now seen corresponding path program 1 times [2023-08-04 09:49:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:40,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484729809] [2023-08-04 09:49:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:40,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:40,781 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 09:49:40,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484729809] [2023-08-04 09:49:40,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484729809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674873184] [2023-08-04 09:49:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:40,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:40,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:40,785 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 09:49:40,787 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 09:49:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:40,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:40,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:40,848 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 09:49:40,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:40,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674873184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:40,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:40,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:49:40,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041625749] [2023-08-04 09:49:40,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:40,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:40,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-04 09:49:40,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 09:49:40,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:40,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-04 09:49:40,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:42,076 INFO L124 PetriNetUnfolderBase]: 14070/21175 cut-off events. [2023-08-04 09:49:42,076 INFO L125 PetriNetUnfolderBase]: For 2125/2125 co-relation queries the response was YES. [2023-08-04 09:49:42,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43003 conditions, 21175 events. 14070/21175 cut-off events. For 2125/2125 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 138780 event pairs, 8632 based on Foata normal form. 0/17245 useless extension candidates. Maximal degree in co-relation 9832. Up to 13835 conditions per place. [2023-08-04 09:49:42,162 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 59 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 09:49:42,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 338 flow [2023-08-04 09:49:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-04 09:49:42,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2023-08-04 09:49:42,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-04 09:49:42,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-04 09:49:42,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:42,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-04 09:49:42,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 09:49:42,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:42,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:42,167 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 165 flow. Second operand 3 states and 405 transitions. [2023-08-04 09:49:42,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 338 flow [2023-08-04 09:49:42,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:42,170 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 175 flow [2023-08-04 09:49:42,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-04 09:49:42,170 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-04 09:49:42,171 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 175 flow [2023-08-04 09:49:42,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 09:49:42,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:42,171 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] [2023-08-04 09:49:42,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:49:42,376 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 09:49:42,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:42,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1903071413, now seen corresponding path program 1 times [2023-08-04 09:49:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:42,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609988744] [2023-08-04 09:49:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:42,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:42,415 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 09:49:42,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609988744] [2023-08-04 09:49:42,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609988744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139425107] [2023-08-04 09:49:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:42,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:42,417 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 09:49:42,419 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 09:49:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:42,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:42,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:42,485 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 09:49:42,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:42,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139425107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:42,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:42,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:49:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430429456] [2023-08-04 09:49:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:42,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-04 09:49:42,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 09:49:42,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:42,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-04 09:49:42,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:43,614 INFO L124 PetriNetUnfolderBase]: 13786/21145 cut-off events. [2023-08-04 09:49:43,614 INFO L125 PetriNetUnfolderBase]: For 4964/4964 co-relation queries the response was YES. [2023-08-04 09:49:43,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44342 conditions, 21145 events. 13786/21145 cut-off events. For 4964/4964 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 139778 event pairs, 10099 based on Foata normal form. 0/18189 useless extension candidates. Maximal degree in co-relation 14063. Up to 15470 conditions per place. [2023-08-04 09:49:43,801 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 60 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 09:49:43,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 350 flow [2023-08-04 09:49:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-04 09:49:43,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2023-08-04 09:49:43,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-04 09:49:43,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-04 09:49:43,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:43,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-04 09:49:43,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 09:49:43,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:43,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 09:49:43,806 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 175 flow. Second operand 3 states and 405 transitions. [2023-08-04 09:49:43,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 350 flow [2023-08-04 09:49:43,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:43,845 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 185 flow [2023-08-04 09:49:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-08-04 09:49:43,846 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 09:49:43,846 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 185 flow [2023-08-04 09:49:43,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 09:49:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:43,846 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] [2023-08-04 09:49:43,854 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 09:49:44,051 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 09:49:44,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:44,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash 55036430, now seen corresponding path program 1 times [2023-08-04 09:49:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:44,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139477058] [2023-08-04 09:49:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:44,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:44,099 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 09:49:44,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139477058] [2023-08-04 09:49:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139477058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288326339] [2023-08-04 09:49:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:44,101 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 09:49:44,104 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 09:49:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:44,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:44,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:44,192 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 09:49:44,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:44,217 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 09:49:44,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288326339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:44,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:44,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:49:44,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953676321] [2023-08-04 09:49:44,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:44,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:44,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:44,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-04 09:49:44,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 119.4) internal successors, (597), 5 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 09:49:44,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:44,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-04 09:49:44,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:45,291 INFO L124 PetriNetUnfolderBase]: 12429/18911 cut-off events. [2023-08-04 09:49:45,291 INFO L125 PetriNetUnfolderBase]: For 3649/3649 co-relation queries the response was YES. [2023-08-04 09:49:45,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40203 conditions, 18911 events. 12429/18911 cut-off events. For 3649/3649 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 122039 event pairs, 5033 based on Foata normal form. 5/16321 useless extension candidates. Maximal degree in co-relation 30006. Up to 16742 conditions per place. [2023-08-04 09:49:45,350 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 54 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-04 09:49:45,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 331 flow [2023-08-04 09:49:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:49:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:49:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-08-04 09:49:45,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2023-08-04 09:49:45,352 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-08-04 09:49:45,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-08-04 09:49:45,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:45,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-08-04 09:49:45,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 09:49:45,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:45,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:45,355 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 185 flow. Second operand 4 states and 512 transitions. [2023-08-04 09:49:45,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 331 flow [2023-08-04 09:49:45,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:45,437 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 203 flow [2023-08-04 09:49:45,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-04 09:49:45,438 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 09:49:45,438 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 203 flow [2023-08-04 09:49:45,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.4) internal successors, (597), 5 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 09:49:45,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:45,438 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] [2023-08-04 09:49:45,443 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 09:49:45,639 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 09:49:45,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:45,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1963651104, now seen corresponding path program 1 times [2023-08-04 09:49:45,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:45,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426501802] [2023-08-04 09:49:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:45,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:45,678 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 09:49:45,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426501802] [2023-08-04 09:49:45,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426501802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776325038] [2023-08-04 09:49:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:45,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:45,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:45,680 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 09:49:45,704 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 09:49:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:45,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:45,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:45,766 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 09:49:45,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:45,784 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 09:49:45,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776325038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:45,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:45,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:49:45,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607076190] [2023-08-04 09:49:45,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:45,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:45,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-04 09:49:45,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 09:49:45,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:45,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-04 09:49:45,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:46,891 INFO L124 PetriNetUnfolderBase]: 11639/17451 cut-off events. [2023-08-04 09:49:46,891 INFO L125 PetriNetUnfolderBase]: For 2423/2423 co-relation queries the response was YES. [2023-08-04 09:49:46,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37853 conditions, 17451 events. 11639/17451 cut-off events. For 2423/2423 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 107457 event pairs, 5117 based on Foata normal form. 80/15076 useless extension candidates. Maximal degree in co-relation 27781. Up to 12729 conditions per place. [2023-08-04 09:49:46,945 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 67 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 09:49:46,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 399 flow [2023-08-04 09:49:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:49:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:49:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-04 09:49:46,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2023-08-04 09:49:46,947 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-04 09:49:46,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-04 09:49:46,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:46,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-04 09:49:46,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 09:49:46,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:46,951 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:46,951 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 203 flow. Second operand 4 states and 524 transitions. [2023-08-04 09:49:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 399 flow [2023-08-04 09:49:47,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 395 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:47,014 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 219 flow [2023-08-04 09:49:47,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-08-04 09:49:47,015 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-04 09:49:47,015 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 219 flow [2023-08-04 09:49:47,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 09:49:47,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:47,016 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] [2023-08-04 09:49:47,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 09:49:47,221 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 09:49:47,221 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:47,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash -533468891, now seen corresponding path program 1 times [2023-08-04 09:49:47,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:47,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206961119] [2023-08-04 09:49:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:47,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:47,271 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 09:49:47,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:47,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206961119] [2023-08-04 09:49:47,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206961119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:47,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701036169] [2023-08-04 09:49:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:47,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:47,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:47,273 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 09:49:47,276 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 09:49:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:47,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:47,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:47,362 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 09:49:47,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:47,376 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 09:49:47,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701036169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:47,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:47,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:49:47,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294691674] [2023-08-04 09:49:47,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:47,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:47,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:47,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-04 09:49:47,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:49:47,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:47,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-04 09:49:47,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:48,075 INFO L124 PetriNetUnfolderBase]: 9270/14060 cut-off events. [2023-08-04 09:49:48,076 INFO L125 PetriNetUnfolderBase]: For 6360/6360 co-relation queries the response was YES. [2023-08-04 09:49:48,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32049 conditions, 14060 events. 9270/14060 cut-off events. For 6360/6360 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 86129 event pairs, 3934 based on Foata normal form. 304/12299 useless extension candidates. Maximal degree in co-relation 30060. Up to 6030 conditions per place. [2023-08-04 09:49:48,132 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-08-04 09:49:48,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 456 flow [2023-08-04 09:49:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:49:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:49:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-04 09:49:48,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2023-08-04 09:49:48,134 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-04 09:49:48,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-04 09:49:48,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:48,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-04 09:49:48,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 09:49:48,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:48,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:48,137 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 219 flow. Second operand 4 states and 531 transitions. [2023-08-04 09:49:48,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 456 flow [2023-08-04 09:49:48,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 452 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:48,167 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 235 flow [2023-08-04 09:49:48,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-04 09:49:48,167 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-04 09:49:48,167 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 235 flow [2023-08-04 09:49:48,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:49:48,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:48,168 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 09:49:48,174 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 09:49:48,373 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 09:49:48,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:48,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:48,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1770231126, now seen corresponding path program 1 times [2023-08-04 09:49:48,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:48,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790151591] [2023-08-04 09:49:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:48,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:48,431 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 09:49:48,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:48,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790151591] [2023-08-04 09:49:48,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790151591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:48,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838525645] [2023-08-04 09:49:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:48,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:48,434 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 09:49:48,436 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 09:49:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:48,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:48,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:48,522 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 09:49:48,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:48,535 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 09:49:48,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838525645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:48,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:49:48,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686623813] [2023-08-04 09:49:48,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:48,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:48,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:48,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-04 09:49:48,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 09:49:48,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:48,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-04 09:49:48,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:49,237 INFO L124 PetriNetUnfolderBase]: 9256/14030 cut-off events. [2023-08-04 09:49:49,237 INFO L125 PetriNetUnfolderBase]: For 8510/8510 co-relation queries the response was YES. [2023-08-04 09:49:49,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33832 conditions, 14030 events. 9256/14030 cut-off events. For 8510/8510 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 85775 event pairs, 8047 based on Foata normal form. 18/11906 useless extension candidates. Maximal degree in co-relation 31792. Up to 11871 conditions per place. [2023-08-04 09:49:49,422 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 76 selfloop transitions, 3 changer transitions 1/92 dead transitions. [2023-08-04 09:49:49,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 474 flow [2023-08-04 09:49:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:49:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:49:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-04 09:49:49,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2023-08-04 09:49:49,425 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-04 09:49:49,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-04 09:49:49,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:49,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-04 09:49:49,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 09:49:49,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:49,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 09:49:49,428 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 235 flow. Second operand 4 states and 531 transitions. [2023-08-04 09:49:49,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 474 flow [2023-08-04 09:49:49,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 470 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:49,479 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 245 flow [2023-08-04 09:49:49,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-08-04 09:49:49,480 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-08-04 09:49:49,480 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 245 flow [2023-08-04 09:49:49,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 09:49:49,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:49,480 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, 1] [2023-08-04 09:49:49,495 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 09:49:49,686 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 09:49:49,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:49,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:49,686 INFO L85 PathProgramCache]: Analyzing trace with hash -85628877, now seen corresponding path program 1 times [2023-08-04 09:49:49,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:49,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272650569] [2023-08-04 09:49:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:49,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:49:50,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:50,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272650569] [2023-08-04 09:49:50,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272650569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:50,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80949476] [2023-08-04 09:49:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:50,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:50,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:50,531 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 09:49:50,534 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 09:49:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:50,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 09:49:50,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:50,724 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 09:49:50,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:51,055 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 09:49:51,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80949476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:51,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:51,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 20 [2023-08-04 09:49:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012203354] [2023-08-04 09:49:51,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:51,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 09:49:51,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 09:49:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-08-04 09:49:51,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 234 [2023-08-04 09:49:51,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 245 flow. Second operand has 20 states, 20 states have (on average 85.65) internal successors, (1713), 20 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 09:49:51,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:51,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 234 [2023-08-04 09:49:51,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:00,317 INFO L124 PetriNetUnfolderBase]: 65930/90233 cut-off events. [2023-08-04 09:50:00,318 INFO L125 PetriNetUnfolderBase]: For 35915/35915 co-relation queries the response was YES. [2023-08-04 09:50:00,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215596 conditions, 90233 events. 65930/90233 cut-off events. For 35915/35915 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 528446 event pairs, 5889 based on Foata normal form. 523/83612 useless extension candidates. Maximal degree in co-relation 214730. Up to 20388 conditions per place. [2023-08-04 09:50:00,963 INFO L140 encePairwiseOnDemand]: 211/234 looper letters, 768 selfloop transitions, 275 changer transitions 86/1130 dead transitions. [2023-08-04 09:50:00,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 1130 transitions, 5542 flow [2023-08-04 09:50:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-04 09:50:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-04 09:50:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 7032 transitions. [2023-08-04 09:50:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060984060984061 [2023-08-04 09:50:00,979 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 7032 transitions. [2023-08-04 09:50:00,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 7032 transitions. [2023-08-04 09:50:00,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:00,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 7032 transitions. [2023-08-04 09:50:00,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 95.02702702702703) internal successors, (7032), 74 states have internal predecessors, (7032), 0 states have call successors, (0), 0 states 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 09:50:01,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 234.0) internal successors, (17550), 75 states have internal predecessors, (17550), 0 states have call successors, (0), 0 states 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 09:50:01,020 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 234.0) internal successors, (17550), 75 states have internal predecessors, (17550), 0 states have call successors, (0), 0 states 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 09:50:01,021 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 245 flow. Second operand 74 states and 7032 transitions. [2023-08-04 09:50:01,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 1130 transitions, 5542 flow [2023-08-04 09:50:02,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 1130 transitions, 5505 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:02,585 INFO L231 Difference]: Finished difference. Result has 200 places, 397 transitions, 2531 flow [2023-08-04 09:50:02,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=2531, PETRI_PLACES=200, PETRI_TRANSITIONS=397} [2023-08-04 09:50:02,586 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 149 predicate places. [2023-08-04 09:50:02,586 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 397 transitions, 2531 flow [2023-08-04 09:50:02,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 85.65) internal successors, (1713), 20 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 09:50:02,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:02,587 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, 1] [2023-08-04 09:50:02,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 09:50:02,795 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 09:50:02,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:02,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1236447119, now seen corresponding path program 1 times [2023-08-04 09:50:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:02,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745796324] [2023-08-04 09:50:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:02,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:50:03,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:03,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745796324] [2023-08-04 09:50:03,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745796324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:03,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305977587] [2023-08-04 09:50:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:03,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:03,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:03,421 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 09:50:03,423 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 09:50:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:03,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-04 09:50:03,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:50:03,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:50:03,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305977587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:03,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:03,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 21 [2023-08-04 09:50:03,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532407692] [2023-08-04 09:50:03,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:03,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 09:50:03,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 09:50:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-08-04 09:50:04,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 234 [2023-08-04 09:50:04,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 397 transitions, 2531 flow. Second operand has 21 states, 21 states have (on average 86.52380952380952) internal successors, (1817), 21 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states 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 09:50:04,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:04,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 234 [2023-08-04 09:50:04,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:24,503 INFO L124 PetriNetUnfolderBase]: 77005/107233 cut-off events. [2023-08-04 09:50:24,504 INFO L125 PetriNetUnfolderBase]: For 2364758/2367321 co-relation queries the response was YES. [2023-08-04 09:50:25,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615363 conditions, 107233 events. 77005/107233 cut-off events. For 2364758/2367321 co-relation queries the response was YES. Maximal size of possible extension queue 2800. Compared 695737 event pairs, 7006 based on Foata normal form. 550/99500 useless extension candidates. Maximal degree in co-relation 612979. Up to 18046 conditions per place. [2023-08-04 09:50:26,163 INFO L140 encePairwiseOnDemand]: 206/234 looper letters, 1117 selfloop transitions, 790 changer transitions 274/2199 dead transitions. [2023-08-04 09:50:26,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 2199 transitions, 21469 flow [2023-08-04 09:50:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-08-04 09:50:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-08-04 09:50:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 10419 transitions. [2023-08-04 09:50:26,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122744539411206 [2023-08-04 09:50:26,182 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 10419 transitions. [2023-08-04 09:50:26,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 10419 transitions. [2023-08-04 09:50:26,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:26,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 10419 transitions. [2023-08-04 09:50:26,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 96.47222222222223) internal successors, (10419), 108 states have internal predecessors, (10419), 0 states have call successors, (0), 0 states 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 09:50:26,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 234.0) internal successors, (25506), 109 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states 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 09:50:26,232 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 234.0) internal successors, (25506), 109 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states 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 09:50:26,232 INFO L175 Difference]: Start difference. First operand has 200 places, 397 transitions, 2531 flow. Second operand 108 states and 10419 transitions. [2023-08-04 09:50:26,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 2199 transitions, 21469 flow [2023-08-04 09:50:42,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 2199 transitions, 20733 flow, removed 229 selfloop flow, removed 13 redundant places. [2023-08-04 09:50:42,600 INFO L231 Difference]: Finished difference. Result has 345 places, 1003 transitions, 9375 flow [2023-08-04 09:50:42,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=9375, PETRI_PLACES=345, PETRI_TRANSITIONS=1003} [2023-08-04 09:50:42,600 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 294 predicate places. [2023-08-04 09:50:42,601 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1003 transitions, 9375 flow [2023-08-04 09:50:42,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 86.52380952380952) internal successors, (1817), 21 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states 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 09:50:42,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:42,602 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, 1] [2023-08-04 09:50:42,606 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 09:50:42,802 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 09:50:42,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:42,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2067741183, now seen corresponding path program 1 times [2023-08-04 09:50:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:42,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598134906] [2023-08-04 09:50:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:50:43,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:43,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598134906] [2023-08-04 09:50:43,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598134906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:43,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477546788] [2023-08-04 09:50:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:43,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:43,092 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 09:50:43,179 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 09:50:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:43,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 09:50:43,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:50:43,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:50:43,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477546788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:43,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:43,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-04 09:50:43,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153430457] [2023-08-04 09:50:43,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:43,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 09:50:43,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:43,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 09:50:43,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-04 09:50:43,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 09:50:43,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1003 transitions, 9375 flow. Second operand has 11 states, 11 states have (on average 108.0909090909091) internal successors, (1189), 11 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:43,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:43,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 09:50:43,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:51:18,072 INFO L124 PetriNetUnfolderBase]: 102135/144438 cut-off events. [2023-08-04 09:51:18,072 INFO L125 PetriNetUnfolderBase]: For 7578393/7581759 co-relation queries the response was YES. [2023-08-04 09:51:21,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183737 conditions, 144438 events. 102135/144438 cut-off events. For 7578393/7581759 co-relation queries the response was YES. Maximal size of possible extension queue 3794. Compared 1011807 event pairs, 24517 based on Foata normal form. 499/135178 useless extension candidates. Maximal degree in co-relation 1183236. Up to 48031 conditions per place. [2023-08-04 09:51:22,288 INFO L140 encePairwiseOnDemand]: 221/234 looper letters, 940 selfloop transitions, 664 changer transitions 71/1714 dead transitions. [2023-08-04 09:51:22,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1714 transitions, 20766 flow [2023-08-04 09:51:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 09:51:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 09:51:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1564 transitions. [2023-08-04 09:51:22,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5569800569800569 [2023-08-04 09:51:22,291 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1564 transitions. [2023-08-04 09:51:22,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1564 transitions. [2023-08-04 09:51:22,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:51:22,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1564 transitions. [2023-08-04 09:51:22,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 130.33333333333334) internal successors, (1564), 12 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states 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 09:51:22,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 09:51:22,295 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 09:51:22,295 INFO L175 Difference]: Start difference. First operand has 345 places, 1003 transitions, 9375 flow. Second operand 12 states and 1564 transitions. [2023-08-04 09:51:22,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1714 transitions, 20766 flow [2023-08-04 09:53:23,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1714 transitions, 19283 flow, removed 627 selfloop flow, removed 16 redundant places. [2023-08-04 09:53:23,288 INFO L231 Difference]: Finished difference. Result has 347 places, 1308 transitions, 14358 flow [2023-08-04 09:53:23,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=8510, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14358, PETRI_PLACES=347, PETRI_TRANSITIONS=1308} [2023-08-04 09:53:23,289 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 296 predicate places. [2023-08-04 09:53:23,289 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1308 transitions, 14358 flow [2023-08-04 09:53:23,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.0909090909091) internal successors, (1189), 11 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:23,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:23,289 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, 1] [2023-08-04 09:53:23,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:23,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:23,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2097493861, now seen corresponding path program 1 times [2023-08-04 09:53:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:23,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173109850] [2023-08-04 09:53:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:53:23,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173109850] [2023-08-04 09:53:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173109850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:53:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 09:53:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920883777] [2023-08-04 09:53:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 09:53:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 09:53:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-04 09:53:23,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 234 [2023-08-04 09:53:23,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1308 transitions, 14358 flow. Second operand has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 0 states 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 09:53:23,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:23,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 234 [2023-08-04 09:53:23,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand