/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:30:50,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:30:50,626 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:30:50,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:30:50,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:30:50,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:30:50,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:30:50,646 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:30:50,647 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:30:50,647 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:30:50,648 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:30:50,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:30:50,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:30:50,649 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:30:50,649 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:30:50,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:30:50,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:30:50,650 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:30:50,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:30:50,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:30:50,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:30:50,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:30:50,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:30:50,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:30:50,653 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:30:50,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:30:50,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:30:50,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:30:50,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:30:50,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:30:50,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:30:50,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:30:50,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:30:50,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:30:50,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:30:50,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:30:50,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:30:50,657 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:30:50,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:30:50,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:30:50,657 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:30:50,658 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:30:50,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:30:50,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:30:50,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:30:50,886 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:30:50,886 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:30:50,886 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-symm.wvr_bound2.c [2023-08-04 08:30:51,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:30:52,176 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:30:52,176 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-symm.wvr_bound2.c [2023-08-04 08:30:52,183 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901c7e024/130f32e684d74b039f3c310086572cf8/FLAG676df1e57 [2023-08-04 08:30:52,196 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901c7e024/130f32e684d74b039f3c310086572cf8 [2023-08-04 08:30:52,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:30:52,199 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:30:52,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:30:52,200 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:30:52,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:30:52,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ffd54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52, skipping insertion in model container [2023-08-04 08:30:52,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,228 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:30:52,362 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-symm.wvr_bound2.c[2465,2478] [2023-08-04 08:30:52,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:30:52,372 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:30:52,390 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-symm.wvr_bound2.c[2465,2478] [2023-08-04 08:30:52,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:30:52,405 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:30:52,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52 WrapperNode [2023-08-04 08:30:52,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:30:52,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:30:52,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:30:52,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:30:52,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,426 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,449 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 158 [2023-08-04 08:30:52,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:30:52,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:30:52,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:30:52,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:30:52,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,475 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:30:52,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:30:52,483 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:30:52,483 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:30:52,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (1/1) ... [2023-08-04 08:30:52,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:30:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:52,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:30:52,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:30:52,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:30:52,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:30:52,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:30:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:30:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:30:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:30:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:30:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:30:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:30:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:30:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:30:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:30:52,578 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:30:52,691 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:30:52,692 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:30:52,899 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:30:52,904 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:30:52,904 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 08:30:52,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:30:52 BoogieIcfgContainer [2023-08-04 08:30:52,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:30:52,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:30:52,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:30:52,909 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:30:52,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:30:52" (1/3) ... [2023-08-04 08:30:52,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb5616c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:30:52, skipping insertion in model container [2023-08-04 08:30:52,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:30:52" (2/3) ... [2023-08-04 08:30:52,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb5616c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:30:52, skipping insertion in model container [2023-08-04 08:30:52,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:30:52" (3/3) ... [2023-08-04 08:30:52,911 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-simpl-str-symm.wvr_bound2.c [2023-08-04 08:30:52,917 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:30:52,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:30:52,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:30:52,924 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:30:52,986 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:30:53,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:53,090 INFO L124 PetriNetUnfolderBase]: 46/379 cut-off events. [2023-08-04 08:30:53,091 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:30:53,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 379 events. 46/379 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1639 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-08-04 08:30:53,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:53,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:53,115 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:30:53,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:53,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:53,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:53,208 INFO L124 PetriNetUnfolderBase]: 46/379 cut-off events. [2023-08-04 08:30:53,208 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:30:53,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 379 events. 46/379 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1639 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-08-04 08:30:53,220 INFO L119 LiptonReduction]: Number of co-enabled transitions 11424 [2023-08-04 08:30:56,756 INFO L134 LiptonReduction]: Checked pairs total: 12014 [2023-08-04 08:30:56,757 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-04 08:30:56,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:30:56,785 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;@9654f41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:30:56,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:30:56,789 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:30:56,789 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-04 08:30:56,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:30:56,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:56,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:30:56,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:56,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:56,793 INFO L85 PathProgramCache]: Analyzing trace with hash -43976185, now seen corresponding path program 1 times [2023-08-04 08:30:56,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:56,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303911386] [2023-08-04 08:30:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:56,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:30:56,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:56,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303911386] [2023-08-04 08:30:56,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303911386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:56,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:30:56,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:30:56,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671614704] [2023-08-04 08:30:56,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:30:56,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 373 [2023-08-04 08:30:56,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:56,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:56,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 373 [2023-08-04 08:30:56,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:57,024 INFO L124 PetriNetUnfolderBase]: 75/197 cut-off events. [2023-08-04 08:30:57,024 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:30:57,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 197 events. 75/197 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 733 event pairs, 30 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 286. Up to 178 conditions per place. [2023-08-04 08:30:57,027 INFO L140 encePairwiseOnDemand]: 368/373 looper letters, 23 selfloop transitions, 2 changer transitions 3/30 dead transitions. [2023-08-04 08:30:57,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 30 transitions, 134 flow [2023-08-04 08:30:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-04 08:30:57,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44682752457551383 [2023-08-04 08:30:57,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-04 08:30:57,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-04 08:30:57,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:57,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-04 08:30:57,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,079 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 82 flow. Second operand 3 states and 500 transitions. [2023-08-04 08:30:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 30 transitions, 134 flow [2023-08-04 08:30:57,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:30:57,082 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 78 flow [2023-08-04 08:30:57,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-04 08:30:57,086 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-04 08:30:57,086 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 78 flow [2023-08-04 08:30:57,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:57,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:57,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:30:57,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:57,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash 575575252, now seen corresponding path program 1 times [2023-08-04 08:30:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:57,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410609163] [2023-08-04 08:30:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:30:57,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:57,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410609163] [2023-08-04 08:30:57,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410609163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:57,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502174278] [2023-08-04 08:30:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:57,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:57,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:57,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:30:57,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:30:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:57,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:30:57,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:30:57,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502174278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:57,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:30:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131139411] [2023-08-04 08:30:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:57,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:57,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 373 [2023-08-04 08:30:57,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:57,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 373 [2023-08-04 08:30:57,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:57,369 INFO L124 PetriNetUnfolderBase]: 73/189 cut-off events. [2023-08-04 08:30:57,369 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 08:30:57,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 189 events. 73/189 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 600 event pairs, 33 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 374. Up to 168 conditions per place. [2023-08-04 08:30:57,370 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 24 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-04 08:30:57,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 138 flow [2023-08-04 08:30:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-04 08:30:57,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459338695263628 [2023-08-04 08:30:57,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-04 08:30:57,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-04 08:30:57,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:57,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-04 08:30:57,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,381 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 78 flow. Second operand 3 states and 499 transitions. [2023-08-04 08:30:57,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 138 flow [2023-08-04 08:30:57,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:30:57,382 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 76 flow [2023-08-04 08:30:57,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-04 08:30:57,383 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-08-04 08:30:57,383 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 76 flow [2023-08-04 08:30:57,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:57,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:57,409 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 08:30:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:57,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:57,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1379018350, now seen corresponding path program 1 times [2023-08-04 08:30:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:57,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584488676] [2023-08-04 08:30:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:30:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584488676] [2023-08-04 08:30:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584488676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192695584] [2023-08-04 08:30:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:57,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:57,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:30:57,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:30:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:57,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:30:57,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:30:57,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:57,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192695584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:57,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:57,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:30:57,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184037332] [2023-08-04 08:30:57,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:57,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:57,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:57,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:57,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 373 [2023-08-04 08:30:57,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:57,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 373 [2023-08-04 08:30:57,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:57,821 INFO L124 PetriNetUnfolderBase]: 43/127 cut-off events. [2023-08-04 08:30:57,822 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 08:30:57,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 127 events. 43/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 321 event pairs, 30 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 147. Up to 100 conditions per place. [2023-08-04 08:30:57,822 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 28 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 08:30:57,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 152 flow [2023-08-04 08:30:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-04 08:30:57,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486148346738159 [2023-08-04 08:30:57,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-04 08:30:57,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-04 08:30:57,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:57,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-04 08:30:57,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,827 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 76 flow. Second operand 3 states and 502 transitions. [2023-08-04 08:30:57,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 152 flow [2023-08-04 08:30:57,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:30:57,828 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 84 flow [2023-08-04 08:30:57,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-04 08:30:57,828 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-08-04 08:30:57,829 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 84 flow [2023-08-04 08:30:57,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:57,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:57,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:57,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:30:58,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:30:58,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:58,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1704727121, now seen corresponding path program 1 times [2023-08-04 08:30:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700013874] [2023-08-04 08:30:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:30:58,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:58,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700013874] [2023-08-04 08:30:58,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700013874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629578443] [2023-08-04 08:30:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:58,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:58,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:58,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:30:58,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:30:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:58,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:30:58,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:30:58,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:58,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629578443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:58,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:58,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:30:58,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257826622] [2023-08-04 08:30:58,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:58,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:58,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:58,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 373 [2023-08-04 08:30:58,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:58,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 373 [2023-08-04 08:30:58,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:58,216 INFO L124 PetriNetUnfolderBase]: 34/104 cut-off events. [2023-08-04 08:30:58,217 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:30:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 104 events. 34/104 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 29 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 128. Up to 83 conditions per place. [2023-08-04 08:30:58,217 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 24 selfloop transitions, 2 changer transitions 2/30 dead transitions. [2023-08-04 08:30:58,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 146 flow [2023-08-04 08:30:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-04 08:30:58,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459338695263628 [2023-08-04 08:30:58,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-04 08:30:58,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-04 08:30:58,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:58,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-04 08:30:58,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,227 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states and 499 transitions. [2023-08-04 08:30:58,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 146 flow [2023-08-04 08:30:58,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:30:58,229 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 86 flow [2023-08-04 08:30:58,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-04 08:30:58,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-04 08:30:58,231 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 86 flow [2023-08-04 08:30:58,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:58,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:58,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 08:30:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:58,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:58,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 459280637, now seen corresponding path program 1 times [2023-08-04 08:30:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585915154] [2023-08-04 08:30:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:30:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:58,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585915154] [2023-08-04 08:30:58,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585915154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:58,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183567546] [2023-08-04 08:30:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:58,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:58,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:30:58,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:30:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:58,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:30:58,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:30:58,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:30:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:30:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183567546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:30:58,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:30:58,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:30:58,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811315661] [2023-08-04 08:30:58,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:30:58,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:30:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:30:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:58,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 373 [2023-08-04 08:30:58,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:58,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 373 [2023-08-04 08:30:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:58,726 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:30:58,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:30:58,726 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 08:30:58,726 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:30:58,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 32 flow [2023-08-04 08:30:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:30:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:30:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 08:30:58,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42359249329758714 [2023-08-04 08:30:58,730 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 08:30:58,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 08:30:58,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:58,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 08:30:58,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,736 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 86 flow. Second operand 4 states and 632 transitions. [2023-08-04 08:30:58,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 32 flow [2023-08-04 08:30:58,736 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 08:30:58,737 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 08:30:58,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, 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 08:30:58,737 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -15 predicate places. [2023-08-04 08:30:58,737 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 08:30:58,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:58,749 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:30:58,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:30:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:58,955 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:30:58,958 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:30:58,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:59,006 INFO L124 PetriNetUnfolderBase]: 46/379 cut-off events. [2023-08-04 08:30:59,007 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:30:59,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 379 events. 46/379 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1639 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-08-04 08:30:59,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:59,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:59,027 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:30:59,027 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:59,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:59,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 179 transitions, 380 flow [2023-08-04 08:30:59,053 INFO L124 PetriNetUnfolderBase]: 46/379 cut-off events. [2023-08-04 08:30:59,053 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:30:59,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 379 events. 46/379 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1639 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-08-04 08:30:59,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 11424 [2023-08-04 08:31:02,250 INFO L134 LiptonReduction]: Checked pairs total: 11902 [2023-08-04 08:31:02,250 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-04 08:31:02,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:31:02,252 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;@9654f41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:02,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:31:02,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:02,254 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-08-04 08:31:02,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:02,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:02,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:31:02,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:02,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1394763824, now seen corresponding path program 1 times [2023-08-04 08:31:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:02,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176735061] [2023-08-04 08:31:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:02,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:02,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:31:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:02,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:31:02,284 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:31:02,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:31:02,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:31:02,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:31:02,285 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:31:02,285 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:31:02,286 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:31:02,286 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:31:02,305 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:31:02,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:02,402 INFO L124 PetriNetUnfolderBase]: 181/1218 cut-off events. [2023-08-04 08:31:02,402 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:31:02,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 1218 events. 181/1218 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7331 event pairs, 1 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 708. Up to 32 conditions per place. [2023-08-04 08:31:02,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:02,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:02,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:02,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:02,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:02,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:02,565 INFO L124 PetriNetUnfolderBase]: 181/1218 cut-off events. [2023-08-04 08:31:02,565 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:31:02,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 1218 events. 181/1218 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7331 event pairs, 1 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 708. Up to 32 conditions per place. [2023-08-04 08:31:02,606 INFO L119 LiptonReduction]: Number of co-enabled transitions 33456 [2023-08-04 08:31:06,989 INFO L134 LiptonReduction]: Checked pairs total: 36622 [2023-08-04 08:31:06,989 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-04 08:31:06,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:31:06,993 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;@9654f41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:06,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:31:06,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:06,995 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-08-04 08:31:06,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:06,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:06,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:31:06,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:06,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1894047681, now seen corresponding path program 1 times [2023-08-04 08:31:06,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:06,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091662925] [2023-08-04 08:31:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:07,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:07,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091662925] [2023-08-04 08:31:07,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091662925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:07,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:07,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:31:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840421421] [2023-08-04 08:31:07,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:07,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:07,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:07,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 540 [2023-08-04 08:31:07,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:07,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 540 [2023-08-04 08:31:07,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:07,321 INFO L124 PetriNetUnfolderBase]: 1269/2320 cut-off events. [2023-08-04 08:31:07,321 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-08-04 08:31:07,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 2320 events. 1269/2320 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 12539 event pairs, 803 based on Foata normal form. 81/2185 useless extension candidates. Maximal degree in co-relation 1824. Up to 2103 conditions per place. [2023-08-04 08:31:07,331 INFO L140 encePairwiseOnDemand]: 535/540 looper letters, 32 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2023-08-04 08:31:07,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 198 flow [2023-08-04 08:31:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-04 08:31:07,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-08-04 08:31:07,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-04 08:31:07,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-04 08:31:07,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:07,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-04 08:31:07,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,341 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 128 flow. Second operand 3 states and 700 transitions. [2023-08-04 08:31:07,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 198 flow [2023-08-04 08:31:07,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:31:07,345 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 124 flow [2023-08-04 08:31:07,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 08:31:07,347 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 08:31:07,347 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 124 flow [2023-08-04 08:31:07,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:07,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:07,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:31:07,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:07,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1274244228, now seen corresponding path program 1 times [2023-08-04 08:31:07,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:07,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028718215] [2023-08-04 08:31:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:07,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:07,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:07,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028718215] [2023-08-04 08:31:07,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028718215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:07,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303496854] [2023-08-04 08:31:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:07,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:07,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:07,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:31:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:07,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:07,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:07,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303496854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069403099] [2023-08-04 08:31:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:07,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 540 [2023-08-04 08:31:07,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:07,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 540 [2023-08-04 08:31:07,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:07,689 INFO L124 PetriNetUnfolderBase]: 1263/2332 cut-off events. [2023-08-04 08:31:07,689 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-04 08:31:07,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2332 events. 1263/2332 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12722 event pairs, 806 based on Foata normal form. 0/2128 useless extension candidates. Maximal degree in co-relation 4699. Up to 2057 conditions per place. [2023-08-04 08:31:07,699 INFO L140 encePairwiseOnDemand]: 537/540 looper letters, 35 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 08:31:07,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 208 flow [2023-08-04 08:31:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-04 08:31:07,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-08-04 08:31:07,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-04 08:31:07,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-04 08:31:07,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:07,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-04 08:31:07,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,707 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 124 flow. Second operand 3 states and 700 transitions. [2023-08-04 08:31:07,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 208 flow [2023-08-04 08:31:07,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:31:07,710 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 128 flow [2023-08-04 08:31:07,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-08-04 08:31:07,711 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-04 08:31:07,711 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 128 flow [2023-08-04 08:31:07,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:07,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:07,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:07,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:07,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:07,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:07,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1290608113, now seen corresponding path program 1 times [2023-08-04 08:31:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513072944] [2023-08-04 08:31:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:07,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513072944] [2023-08-04 08:31:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513072944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473242322] [2023-08-04 08:31:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:07,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:07,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:07,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:31:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:08,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:08,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:08,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:08,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473242322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:08,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:08,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:08,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211425841] [2023-08-04 08:31:08,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:08,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:08,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 540 [2023-08-04 08:31:08,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:08,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 540 [2023-08-04 08:31:08,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:08,286 INFO L124 PetriNetUnfolderBase]: 1109/2106 cut-off events. [2023-08-04 08:31:08,287 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 08:31:08,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4370 conditions, 2106 events. 1109/2106 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 11459 event pairs, 772 based on Foata normal form. 0/1970 useless extension candidates. Maximal degree in co-relation 1994. Up to 1577 conditions per place. [2023-08-04 08:31:08,299 INFO L140 encePairwiseOnDemand]: 537/540 looper letters, 41 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 08:31:08,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 244 flow [2023-08-04 08:31:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 705 transitions. [2023-08-04 08:31:08,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2023-08-04 08:31:08,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 705 transitions. [2023-08-04 08:31:08,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 705 transitions. [2023-08-04 08:31:08,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:08,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 705 transitions. [2023-08-04 08:31:08,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,307 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 128 flow. Second operand 3 states and 705 transitions. [2023-08-04 08:31:08,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 244 flow [2023-08-04 08:31:08,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:08,310 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 138 flow [2023-08-04 08:31:08,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-04 08:31:08,312 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 08:31:08,312 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 138 flow [2023-08-04 08:31:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:08,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:08,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:08,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:08,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:08,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:08,518 INFO L85 PathProgramCache]: Analyzing trace with hash 693769031, now seen corresponding path program 1 times [2023-08-04 08:31:08,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:08,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271010749] [2023-08-04 08:31:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:08,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:08,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271010749] [2023-08-04 08:31:08,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271010749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:08,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313887112] [2023-08-04 08:31:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:08,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:08,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:08,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:08,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:31:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:08,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:08,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:08,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:08,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313887112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:08,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:08,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:08,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800619591] [2023-08-04 08:31:08,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:08,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:08,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:08,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 540 [2023-08-04 08:31:08,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:08,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 540 [2023-08-04 08:31:08,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:08,944 INFO L124 PetriNetUnfolderBase]: 1020/1973 cut-off events. [2023-08-04 08:31:08,944 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 08:31:08,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 1973 events. 1020/1973 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10316 event pairs, 731 based on Foata normal form. 0/1934 useless extension candidates. Maximal degree in co-relation 2146. Up to 1403 conditions per place. [2023-08-04 08:31:08,951 INFO L140 encePairwiseOnDemand]: 537/540 looper letters, 42 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 08:31:08,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 256 flow [2023-08-04 08:31:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 705 transitions. [2023-08-04 08:31:08,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2023-08-04 08:31:08,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 705 transitions. [2023-08-04 08:31:08,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 705 transitions. [2023-08-04 08:31:08,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:08,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 705 transitions. [2023-08-04 08:31:08,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 540.0) internal successors, (2160), 4 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,957 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 138 flow. Second operand 3 states and 705 transitions. [2023-08-04 08:31:08,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 256 flow [2023-08-04 08:31:08,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:08,959 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 148 flow [2023-08-04 08:31:08,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-04 08:31:08,959 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-04 08:31:08,959 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 148 flow [2023-08-04 08:31:08,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:08,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:08,960 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] [2023-08-04 08:31:08,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 08:31:09,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:09,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:09,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1614823358, now seen corresponding path program 1 times [2023-08-04 08:31:09,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:09,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693092136] [2023-08-04 08:31:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:09,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:09,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:09,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693092136] [2023-08-04 08:31:09,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693092136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:09,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30469193] [2023-08-04 08:31:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:09,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:09,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:09,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:09,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:31:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:09,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:09,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:09,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:09,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30469193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:09,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:09,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:31:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596754531] [2023-08-04 08:31:09,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:09,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:09,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:09,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 540 [2023-08-04 08:31:09,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:09,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:09,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 540 [2023-08-04 08:31:09,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:09,499 INFO L124 PetriNetUnfolderBase]: 918/1777 cut-off events. [2023-08-04 08:31:09,499 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 08:31:09,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1777 events. 918/1777 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9157 event pairs, 415 based on Foata normal form. 2/1775 useless extension candidates. Maximal degree in co-relation 2162. Up to 1587 conditions per place. [2023-08-04 08:31:09,508 INFO L140 encePairwiseOnDemand]: 536/540 looper letters, 36 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2023-08-04 08:31:09,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 238 flow [2023-08-04 08:31:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 918 transitions. [2023-08-04 08:31:09,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-08-04 08:31:09,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 918 transitions. [2023-08-04 08:31:09,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 918 transitions. [2023-08-04 08:31:09,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:09,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 918 transitions. [2023-08-04 08:31:09,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:09,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:09,515 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:09,515 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 148 flow. Second operand 4 states and 918 transitions. [2023-08-04 08:31:09,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 238 flow [2023-08-04 08:31:09,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:09,519 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 160 flow [2023-08-04 08:31:09,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-04 08:31:09,520 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-04 08:31:09,520 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 160 flow [2023-08-04 08:31:09,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:09,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:09,521 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] [2023-08-04 08:31:09,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:09,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:31:09,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:09,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2071937358, now seen corresponding path program 1 times [2023-08-04 08:31:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:09,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083298314] [2023-08-04 08:31:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:09,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:09,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:09,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083298314] [2023-08-04 08:31:09,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083298314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:09,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997385444] [2023-08-04 08:31:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:09,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:09,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:09,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:31:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:09,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:09,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:09,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:09,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997385444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:09,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:09,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:31:09,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947563961] [2023-08-04 08:31:09,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:09,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:09,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:09,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 540 [2023-08-04 08:31:09,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:09,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:09,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 540 [2023-08-04 08:31:09,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:10,105 INFO L124 PetriNetUnfolderBase]: 866/1681 cut-off events. [2023-08-04 08:31:10,105 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 08:31:10,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1681 events. 866/1681 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8360 event pairs, 392 based on Foata normal form. 8/1685 useless extension candidates. Maximal degree in co-relation 2393. Up to 1367 conditions per place. [2023-08-04 08:31:10,111 INFO L140 encePairwiseOnDemand]: 536/540 looper letters, 40 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 08:31:10,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 266 flow [2023-08-04 08:31:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 922 transitions. [2023-08-04 08:31:10,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42685185185185187 [2023-08-04 08:31:10,114 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 922 transitions. [2023-08-04 08:31:10,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 922 transitions. [2023-08-04 08:31:10,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:10,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 922 transitions. [2023-08-04 08:31:10,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,118 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,118 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 160 flow. Second operand 4 states and 922 transitions. [2023-08-04 08:31:10,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 266 flow [2023-08-04 08:31:10,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 257 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:31:10,121 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 165 flow [2023-08-04 08:31:10,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-04 08:31:10,122 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2023-08-04 08:31:10,122 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 165 flow [2023-08-04 08:31:10,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:10,123 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] [2023-08-04 08:31:10,141 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 08:31:10,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:10,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:10,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash 221828530, now seen corresponding path program 1 times [2023-08-04 08:31:10,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:10,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689763650] [2023-08-04 08:31:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:10,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:10,376 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 08:31:10,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:10,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689763650] [2023-08-04 08:31:10,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689763650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:10,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982484500] [2023-08-04 08:31:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:10,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:10,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:10,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:31:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:10,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:10,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:31:10,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:31:10,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982484500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:10,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:10,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:31:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768054182] [2023-08-04 08:31:10,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:10,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:10,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:10,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:10,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:10,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 540 [2023-08-04 08:31:10,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:10,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 540 [2023-08-04 08:31:10,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:10,676 INFO L124 PetriNetUnfolderBase]: 542/1069 cut-off events. [2023-08-04 08:31:10,676 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 08:31:10,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 1069 events. 542/1069 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4504 event pairs, 223 based on Foata normal form. 32/1097 useless extension candidates. Maximal degree in co-relation 1905. Up to 470 conditions per place. [2023-08-04 08:31:10,681 INFO L140 encePairwiseOnDemand]: 536/540 looper letters, 45 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-04 08:31:10,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 300 flow [2023-08-04 08:31:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 927 transitions. [2023-08-04 08:31:10,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2023-08-04 08:31:10,684 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 927 transitions. [2023-08-04 08:31:10,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 927 transitions. [2023-08-04 08:31:10,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:10,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 927 transitions. [2023-08-04 08:31:10,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,691 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,691 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 165 flow. Second operand 4 states and 927 transitions. [2023-08-04 08:31:10,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 300 flow [2023-08-04 08:31:10,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 290 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:31:10,694 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 176 flow [2023-08-04 08:31:10,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-04 08:31:10,694 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2023-08-04 08:31:10,695 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 176 flow [2023-08-04 08:31:10,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:10,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:10,696 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] [2023-08-04 08:31:10,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:10,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:31:10,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:10,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash 756015323, now seen corresponding path program 1 times [2023-08-04 08:31:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:10,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552100282] [2023-08-04 08:31:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:31:10,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552100282] [2023-08-04 08:31:10,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552100282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726356501] [2023-08-04 08:31:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:10,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:10,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:10,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:11,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:31:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:11,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:11,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:31:11,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:31:11,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726356501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:11,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:11,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:31:11,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931668724] [2023-08-04 08:31:11,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:11,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 540 [2023-08-04 08:31:11,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:11,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:11,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 540 [2023-08-04 08:31:11,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:11,292 INFO L124 PetriNetUnfolderBase]: 530/1026 cut-off events. [2023-08-04 08:31:11,292 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 08:31:11,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 1026 events. 530/1026 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4241 event pairs, 439 based on Foata normal form. 9/1031 useless extension candidates. Maximal degree in co-relation 2086. Up to 751 conditions per place. [2023-08-04 08:31:11,295 INFO L140 encePairwiseOnDemand]: 536/540 looper letters, 45 selfloop transitions, 3 changer transitions 2/55 dead transitions. [2023-08-04 08:31:11,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 312 flow [2023-08-04 08:31:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 927 transitions. [2023-08-04 08:31:11,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2023-08-04 08:31:11,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 927 transitions. [2023-08-04 08:31:11,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 927 transitions. [2023-08-04 08:31:11,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:11,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 927 transitions. [2023-08-04 08:31:11,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:11,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:11,302 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 540.0) internal successors, (2700), 5 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:11,302 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 176 flow. Second operand 4 states and 927 transitions. [2023-08-04 08:31:11,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 312 flow [2023-08-04 08:31:11,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 308 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:11,305 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 180 flow [2023-08-04 08:31:11,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 08:31:11,306 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-08-04 08:31:11,306 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 180 flow [2023-08-04 08:31:11,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:11,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:11,307 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] [2023-08-04 08:31:11,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:11,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:31:11,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:11,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash -583747666, now seen corresponding path program 1 times [2023-08-04 08:31:11,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:11,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809487309] [2023-08-04 08:31:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:11,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:31:12,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:12,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809487309] [2023-08-04 08:31:12,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809487309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:12,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632818057] [2023-08-04 08:31:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:12,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:12,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:12,378 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:12,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:31:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:12,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 08:31:12,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:31:13,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:31:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632818057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:14,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:14,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-04 08:31:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870045054] [2023-08-04 08:31:14,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:31:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:31:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:31:14,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 540 [2023-08-04 08:31:14,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 192.53846153846155) internal successors, (2503), 13 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:14,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:14,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 540 [2023-08-04 08:31:14,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:15,517 INFO L124 PetriNetUnfolderBase]: 725/1389 cut-off events. [2023-08-04 08:31:15,517 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-08-04 08:31:15,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3642 conditions, 1389 events. 725/1389 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6960 event pairs, 91 based on Foata normal form. 1/1379 useless extension candidates. Maximal degree in co-relation 3535. Up to 670 conditions per place. [2023-08-04 08:31:15,524 INFO L140 encePairwiseOnDemand]: 532/540 looper letters, 49 selfloop transitions, 5 changer transitions 39/98 dead transitions. [2023-08-04 08:31:15,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 643 flow [2023-08-04 08:31:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:31:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:31:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1399 transitions. [2023-08-04 08:31:15,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701058201058201 [2023-08-04 08:31:15,528 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1399 transitions. [2023-08-04 08:31:15,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1399 transitions. [2023-08-04 08:31:15,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:15,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1399 transitions. [2023-08-04 08:31:15,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:15,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 540.0) internal successors, (4320), 8 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:15,535 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 540.0) internal successors, (4320), 8 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:15,535 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 180 flow. Second operand 7 states and 1399 transitions. [2023-08-04 08:31:15,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 643 flow [2023-08-04 08:31:15,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 622 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:31:15,541 INFO L231 Difference]: Finished difference. Result has 65 places, 44 transitions, 222 flow [2023-08-04 08:31:15,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=65, PETRI_TRANSITIONS=44} [2023-08-04 08:31:15,542 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2023-08-04 08:31:15,542 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 44 transitions, 222 flow [2023-08-04 08:31:15,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 192.53846153846155) internal successors, (2503), 13 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:15,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:15,543 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] [2023-08-04 08:31:15,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:31:15,749 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:15,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash 197889622, now seen corresponding path program 2 times [2023-08-04 08:31:15,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:15,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079466746] [2023-08-04 08:31:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:31:16,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:16,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079466746] [2023-08-04 08:31:16,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079466746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:16,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:16,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 08:31:16,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261472880] [2023-08-04 08:31:16,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:16,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 08:31:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 08:31:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:31:16,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 540 [2023-08-04 08:31:16,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 44 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 206.66666666666666) internal successors, (1240), 6 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:16,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:16,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 540 [2023-08-04 08:31:16,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:16,848 INFO L124 PetriNetUnfolderBase]: 235/564 cut-off events. [2023-08-04 08:31:16,848 INFO L125 PetriNetUnfolderBase]: For 880/880 co-relation queries the response was YES. [2023-08-04 08:31:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 564 events. 235/564 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2692 event pairs, 39 based on Foata normal form. 1/560 useless extension candidates. Maximal degree in co-relation 1914. Up to 443 conditions per place. [2023-08-04 08:31:16,852 INFO L140 encePairwiseOnDemand]: 532/540 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2023-08-04 08:31:16,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 426 flow [2023-08-04 08:31:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:31:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:31:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1464 transitions. [2023-08-04 08:31:16,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873015873015873 [2023-08-04 08:31:16,855 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1464 transitions. [2023-08-04 08:31:16,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1464 transitions. [2023-08-04 08:31:16,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:16,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1464 transitions. [2023-08-04 08:31:16,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 209.14285714285714) internal successors, (1464), 7 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:16,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 540.0) internal successors, (4320), 8 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:16,863 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 540.0) internal successors, (4320), 8 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:16,863 INFO L175 Difference]: Start difference. First operand has 65 places, 44 transitions, 222 flow. Second operand 7 states and 1464 transitions. [2023-08-04 08:31:16,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 426 flow [2023-08-04 08:31:16,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 422 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:16,865 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-04 08:31:16,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=540, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-04 08:31:16,865 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2023-08-04 08:31:16,866 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-04 08:31:16,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.66666666666666) internal successors, (1240), 6 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:16,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:31:16,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:31:16,866 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:16,867 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:31:16,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:16,948 INFO L124 PetriNetUnfolderBase]: 181/1218 cut-off events. [2023-08-04 08:31:16,948 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:31:16,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 1218 events. 181/1218 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7331 event pairs, 1 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 708. Up to 32 conditions per place. [2023-08-04 08:31:16,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:16,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:16,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:16,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:16,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:16,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 253 transitions, 554 flow [2023-08-04 08:31:17,036 INFO L124 PetriNetUnfolderBase]: 181/1218 cut-off events. [2023-08-04 08:31:17,036 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:31:17,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 1218 events. 181/1218 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7331 event pairs, 1 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 708. Up to 32 conditions per place. [2023-08-04 08:31:17,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 33456 [2023-08-04 08:31:20,806 INFO L134 LiptonReduction]: Checked pairs total: 36493 [2023-08-04 08:31:20,807 INFO L136 LiptonReduction]: Total number of compositions: 281 [2023-08-04 08:31:20,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:31:20,810 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;@9654f41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:20,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:31:20,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:20,814 INFO L124 PetriNetUnfolderBase]: 3/66 cut-off events. [2023-08-04 08:31:20,814 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:31:20,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:20,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:31:20,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:20,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1114041242, now seen corresponding path program 1 times [2023-08-04 08:31:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:20,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881209844] [2023-08-04 08:31:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:20,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:20,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881209844] [2023-08-04 08:31:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881209844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990525261] [2023-08-04 08:31:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:20,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:20,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:20,864 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:20,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:31:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:20,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:31:20,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:20,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:20,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990525261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:20,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:20,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:31:20,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666511335] [2023-08-04 08:31:20,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:20,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:31:20,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 534 [2023-08-04 08:31:20,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:20,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:20,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 534 [2023-08-04 08:31:20,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:21,247 INFO L124 PetriNetUnfolderBase]: 1284/2305 cut-off events. [2023-08-04 08:31:21,247 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-08-04 08:31:21,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4756 conditions, 2305 events. 1284/2305 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12328 event pairs, 542 based on Foata normal form. 0/2084 useless extension candidates. Maximal degree in co-relation 1799. Up to 2121 conditions per place. [2023-08-04 08:31:21,253 INFO L140 encePairwiseOnDemand]: 529/534 looper letters, 16 selfloop transitions, 5 changer transitions 19/43 dead transitions. [2023-08-04 08:31:21,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 206 flow [2023-08-04 08:31:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:31:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:31:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1140 transitions. [2023-08-04 08:31:21,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42696629213483145 [2023-08-04 08:31:21,258 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1140 transitions. [2023-08-04 08:31:21,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1140 transitions. [2023-08-04 08:31:21,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:21,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1140 transitions. [2023-08-04 08:31:21,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 534.0) internal successors, (3204), 6 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,265 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 534.0) internal successors, (3204), 6 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,265 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 124 flow. Second operand 5 states and 1140 transitions. [2023-08-04 08:31:21,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 206 flow [2023-08-04 08:31:21,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:21,267 INFO L231 Difference]: Finished difference. Result has 40 places, 20 transitions, 75 flow [2023-08-04 08:31:21,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=534, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=20} [2023-08-04 08:31:21,267 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-04 08:31:21,267 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 20 transitions, 75 flow [2023-08-04 08:31:21,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:21,268 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 08:31:21,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:21,473 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,SelfDestructingSolverStorable16 [2023-08-04 08:31:21,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:21,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:21,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1611013158, now seen corresponding path program 1 times [2023-08-04 08:31:21,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:21,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215209786] [2023-08-04 08:31:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:21,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:21,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:21,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215209786] [2023-08-04 08:31:21,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215209786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:21,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:21,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:31:21,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919427466] [2023-08-04 08:31:21,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:21,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:21,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:21,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:21,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 534 [2023-08-04 08:31:21,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 20 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:21,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 534 [2023-08-04 08:31:21,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:21,586 INFO L124 PetriNetUnfolderBase]: 180/349 cut-off events. [2023-08-04 08:31:21,586 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 08:31:21,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 349 events. 180/349 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1269 event pairs, 114 based on Foata normal form. 1/344 useless extension candidates. Maximal degree in co-relation 308. Up to 313 conditions per place. [2023-08-04 08:31:21,587 INFO L140 encePairwiseOnDemand]: 531/534 looper letters, 16 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-04 08:31:21,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 112 flow [2023-08-04 08:31:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-04 08:31:21,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250936329588015 [2023-08-04 08:31:21,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-04 08:31:21,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-04 08:31:21,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:21,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-04 08:31:21,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 534.0) internal successors, (2136), 4 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 534.0) internal successors, (2136), 4 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,595 INFO L175 Difference]: Start difference. First operand has 40 places, 20 transitions, 75 flow. Second operand 3 states and 681 transitions. [2023-08-04 08:31:21,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 21 transitions, 112 flow [2023-08-04 08:31:21,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 109 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:21,596 INFO L231 Difference]: Finished difference. Result has 30 places, 19 transitions, 71 flow [2023-08-04 08:31:21,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=534, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=30, PETRI_TRANSITIONS=19} [2023-08-04 08:31:21,596 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-08-04 08:31:21,596 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 19 transitions, 71 flow [2023-08-04 08:31:21,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:21,597 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:21,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 08:31:21,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:21,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1608948515, now seen corresponding path program 1 times [2023-08-04 08:31:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397057485] [2023-08-04 08:31:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:21,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397057485] [2023-08-04 08:31:21,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397057485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679783465] [2023-08-04 08:31:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:21,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:21,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:21,627 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:21,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:31:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:21,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:21,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:21,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:21,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679783465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:21,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:21,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:31:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986444435] [2023-08-04 08:31:21,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:21,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:21,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:21,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 534 [2023-08-04 08:31:21,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 19 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:21,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 534 [2023-08-04 08:31:21,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:21,809 INFO L124 PetriNetUnfolderBase]: 136/255 cut-off events. [2023-08-04 08:31:21,809 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 08:31:21,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 255 events. 136/255 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 762 event pairs, 48 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 310. Up to 217 conditions per place. [2023-08-04 08:31:21,810 INFO L140 encePairwiseOnDemand]: 531/534 looper letters, 16 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-08-04 08:31:21,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 114 flow [2023-08-04 08:31:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 900 transitions. [2023-08-04 08:31:21,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42134831460674155 [2023-08-04 08:31:21,813 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 900 transitions. [2023-08-04 08:31:21,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 900 transitions. [2023-08-04 08:31:21,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:21,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 900 transitions. [2023-08-04 08:31:21,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 534.0) internal successors, (2670), 5 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 534.0) internal successors, (2670), 5 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,818 INFO L175 Difference]: Start difference. First operand has 30 places, 19 transitions, 71 flow. Second operand 4 states and 900 transitions. [2023-08-04 08:31:21,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 114 flow [2023-08-04 08:31:21,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:21,819 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 68 flow [2023-08-04 08:31:21,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=534, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-04 08:31:21,819 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-08-04 08:31:21,820 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 68 flow [2023-08-04 08:31:21,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:21,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:21,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:21,828 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 08:31:22,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:22,026 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:22,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:22,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1327701311, now seen corresponding path program 1 times [2023-08-04 08:31:22,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:22,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331208861] [2023-08-04 08:31:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:22,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:31:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:22,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331208861] [2023-08-04 08:31:22,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331208861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:22,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018121609] [2023-08-04 08:31:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:22,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:22,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:22,060 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:22,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:31:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:22,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:31:22,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:31:22,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:22,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018121609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:22,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:22,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:31:22,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277649330] [2023-08-04 08:31:22,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:22,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:22,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:22,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:31:22,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 534 [2023-08-04 08:31:22,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:22,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:22,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 534 [2023-08-04 08:31:22,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:22,243 INFO L124 PetriNetUnfolderBase]: 104/199 cut-off events. [2023-08-04 08:31:22,243 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 08:31:22,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 199 events. 104/199 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 537 event pairs, 8 based on Foata normal form. 16/211 useless extension candidates. Maximal degree in co-relation 237. Up to 80 conditions per place. [2023-08-04 08:31:22,244 INFO L140 encePairwiseOnDemand]: 531/534 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-04 08:31:22,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 138 flow [2023-08-04 08:31:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:31:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:31:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2023-08-04 08:31:22,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217228464419476 [2023-08-04 08:31:22,247 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2023-08-04 08:31:22,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2023-08-04 08:31:22,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:22,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2023-08-04 08:31:22,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:22,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 534.0) internal successors, (3204), 6 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:22,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 534.0) internal successors, (3204), 6 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:22,253 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 68 flow. Second operand 5 states and 1126 transitions. [2023-08-04 08:31:22,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 138 flow [2023-08-04 08:31:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:31:22,254 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-04 08:31:22,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=534, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-04 08:31:22,254 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-08-04 08:31:22,254 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-04 08:31:22,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:22,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:31:22,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:31:22,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:22,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:22,461 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 08:31:22,463 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (2/2) [2023-08-04 08:31:22,464 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:31:22,464 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:31:22,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:31:22 BasicIcfg [2023-08-04 08:31:22,471 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:31:22,471 INFO L158 Benchmark]: Toolchain (without parser) took 30272.04ms. Allocated memory was 505.4MB in the beginning and 887.1MB in the end (delta: 381.7MB). Free memory was 470.7MB in the beginning and 696.2MB in the end (delta: -225.5MB). Peak memory consumption was 158.7MB. Max. memory is 16.0GB. [2023-08-04 08:31:22,472 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 350.2MB. Free memory is still 306.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:31:22,473 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.68ms. Allocated memory is still 505.4MB. Free memory was 470.1MB in the beginning and 458.8MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 08:31:22,473 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.26ms. Allocated memory is still 505.4MB. Free memory was 458.8MB in the beginning and 456.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:31:22,473 INFO L158 Benchmark]: Boogie Preprocessor took 32.21ms. Allocated memory is still 505.4MB. Free memory was 456.8MB in the beginning and 455.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:31:22,474 INFO L158 Benchmark]: RCFGBuilder took 422.88ms. Allocated memory is still 505.4MB. Free memory was 455.4MB in the beginning and 438.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-04 08:31:22,475 INFO L158 Benchmark]: TraceAbstraction took 29563.47ms. Allocated memory was 505.4MB in the beginning and 887.1MB in the end (delta: 381.7MB). Free memory was 437.9MB in the beginning and 696.2MB in the end (delta: -258.2MB). Peak memory consumption was 125.2MB. Max. memory is 16.0GB. [2023-08-04 08:31:22,476 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 350.2MB. Free memory is still 306.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 205.68ms. Allocated memory is still 505.4MB. Free memory was 470.1MB in the beginning and 458.8MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.26ms. Allocated memory is still 505.4MB. Free memory was 458.8MB in the beginning and 456.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.21ms. Allocated memory is still 505.4MB. Free memory was 456.8MB in the beginning and 455.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 422.88ms. Allocated memory is still 505.4MB. Free memory was 455.4MB in the beginning and 438.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 29563.47ms. Allocated memory was 505.4MB in the beginning and 887.1MB in the end (delta: 381.7MB). Free memory was 437.9MB in the beginning and 696.2MB in the end (delta: -258.2MB). Peak memory consumption was 125.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 165 PlacesBefore, 30 PlacesAfterwards, 179 TransitionsBefore, 30 TransitionsAfterwards, 11424 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 99 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 48 ConcurrentYvCompositions, 14 ChoiceCompositions, 194 TotalNumberOfCompositions, 12014 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11377, independent: 11338, independent conditional: 0, independent unconditional: 11338, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6804, independent: 6780, independent conditional: 0, independent unconditional: 6780, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11377, independent: 4558, independent conditional: 0, independent unconditional: 4558, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 6804, unknown conditional: 0, unknown unconditional: 6804] , Statistics on independence cache: Total cache size (in pairs): 25, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 165 PlacesBefore, 30 PlacesAfterwards, 179 TransitionsBefore, 30 TransitionsAfterwards, 11424 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 97 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 48 ConcurrentYvCompositions, 14 ChoiceCompositions, 192 TotalNumberOfCompositions, 11902 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11188, independent: 11150, independent conditional: 0, independent unconditional: 11150, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6671, independent: 6646, independent conditional: 0, independent unconditional: 6646, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11188, independent: 4504, independent conditional: 0, independent unconditional: 4504, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 6671, unknown conditional: 0, unknown unconditional: 6671] , Statistics on independence cache: Total cache size (in pairs): 15, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 231 PlacesBefore, 40 PlacesAfterwards, 253 TransitionsBefore, 40 TransitionsAfterwards, 33456 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 149 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 83 ConcurrentYvCompositions, 22 ChoiceCompositions, 287 TotalNumberOfCompositions, 36622 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 34681, independent: 34631, independent conditional: 0, independent unconditional: 34631, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 19711, independent: 19673, independent conditional: 0, independent unconditional: 19673, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 34681, independent: 14958, independent conditional: 0, independent unconditional: 14958, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 19711, unknown conditional: 0, unknown unconditional: 19711] , Statistics on independence cache: Total cache size (in pairs): 54, Positive cache size: 48, Positive conditional cache size: 0, Positive unconditional cache size: 48, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 231 PlacesBefore, 39 PlacesAfterwards, 253 TransitionsBefore, 38 TransitionsAfterwards, 33456 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 148 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 77 ConcurrentYvCompositions, 23 ChoiceCompositions, 281 TotalNumberOfCompositions, 36493 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 34409, independent: 34345, independent conditional: 0, independent unconditional: 34345, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 19592, independent: 19552, independent conditional: 0, independent unconditional: 19552, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 34409, independent: 14793, independent conditional: 0, independent unconditional: 14793, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 19592, unknown conditional: 0, unknown unconditional: 19592] , Statistics on independence cache: Total cache size (in pairs): 69, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 72]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 223 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.9s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 88 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 257 IncrementalHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 4 mSDtfsCounter, 257 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=4, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 438 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 285 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 845 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 642 mSDsluCounter, 443 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 424 mSDsCounter, 61 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1962 IncrementalHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 61 mSolverCounterUnsat, 19 mSDtfsCounter, 1962 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 434 GetRequests, 380 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=222occurred in iteration=9, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 494 NumberOfCodeBlocks, 494 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 644 ConstructedInterpolants, 0 QuantifiedInterpolants, 5432 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1082 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 214/235 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 223 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 285 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.6s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 133 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 104 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 237 IncrementalHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 3 mSDtfsCounter, 237 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 333 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 08:31:22,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...