/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_72-funloop_hard_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:25:58,799 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:25:58,856 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:25:58,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:25:58,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:25:58,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:25:58,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:25:58,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:25:58,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:25:58,884 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:25:58,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:25:58,884 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:25:58,885 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:25:58,886 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:25:58,886 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:25:58,886 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:25:58,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:25:58,886 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:25:58,886 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:25:58,887 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:25:58,887 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:25:58,887 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:25:58,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:25:58,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:25:58,888 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:25:58,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:25:58,889 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:25:58,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:25:58,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:25:58,889 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:25:58,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:25:58,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:25:58,890 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:25:58,890 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:25:58,891 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:25:58,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:25:58,891 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:25:58,891 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:25:58,891 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:25:58,891 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:25:58,891 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:25:58,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:25:59,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:25:59,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:25:59,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:25:59,076 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:25:59,076 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:25:59,077 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_72-funloop_hard_racing_bound2.i [2023-08-03 21:26:00,033 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:26:00,219 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:26:00,220 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_72-funloop_hard_racing_bound2.i [2023-08-03 21:26:00,230 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222c8e95f/4f43f3990ed84251aeddaa6cc21d60da/FLAG5f3794419 [2023-08-03 21:26:00,239 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222c8e95f/4f43f3990ed84251aeddaa6cc21d60da [2023-08-03 21:26:00,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:26:00,241 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:26:00,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:26:00,242 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:26:00,244 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:26:00,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1f7639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00, skipping insertion in model container [2023-08-03 21:26:00,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,280 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:26:00,551 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_72-funloop_hard_racing_bound2.i[41323,41336] [2023-08-03 21:26:00,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:26:00,589 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:26:00,609 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:26:00,610 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:26:00,615 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-03 21:26:00,624 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_72-funloop_hard_racing_bound2.i[41323,41336] [2023-08-03 21:26:00,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:26:00,681 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:26:00,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00 WrapperNode [2023-08-03 21:26:00,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:26:00,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:26:00,682 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:26:00,682 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:26:00,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,728 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-08-03 21:26:00,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:26:00,728 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:26:00,728 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:26:00,728 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:26:00,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:26:00,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:26:00,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:26:00,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:26:00,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (1/1) ... [2023-08-03 21:26:00,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:26:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:00,897 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) [2023-08-03 21:26:00,905 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 [2023-08-03 21:26:00,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:26:00,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:26:00,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:26:00,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:26:00,935 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:26:00,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:26:00,935 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:26:00,935 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:26:00,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:26:00,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:26:00,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:26:00,936 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:26:01,038 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:26:01,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:26:01,259 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:26:01,266 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:26:01,266 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-03 21:26:01,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:26:01 BoogieIcfgContainer [2023-08-03 21:26:01,268 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:26:01,269 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:26:01,269 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:26:01,271 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:26:01,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:26:00" (1/3) ... [2023-08-03 21:26:01,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c13cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:26:01, skipping insertion in model container [2023-08-03 21:26:01,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:26:00" (2/3) ... [2023-08-03 21:26:01,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c13cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:26:01, skipping insertion in model container [2023-08-03 21:26:01,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:26:01" (3/3) ... [2023-08-03 21:26:01,273 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_72-funloop_hard_racing_bound2.i [2023-08-03 21:26:01,279 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:26:01,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:26:01,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-03 21:26:01,286 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:26:01,332 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:26:01,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 246 transitions, 500 flow [2023-08-03 21:26:01,425 INFO L124 PetriNetUnfolderBase]: 73/381 cut-off events. [2023-08-03 21:26:01,426 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:26:01,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 381 events. 73/381 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1706 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-03 21:26:01,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 246 transitions, 500 flow [2023-08-03 21:26:01,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 241 transitions, 487 flow [2023-08-03 21:26:01,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:26:01,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 241 transitions, 487 flow [2023-08-03 21:26:01,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 241 transitions, 487 flow [2023-08-03 21:26:01,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 241 transitions, 487 flow [2023-08-03 21:26:01,480 INFO L124 PetriNetUnfolderBase]: 72/376 cut-off events. [2023-08-03 21:26:01,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:01,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 376 events. 72/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1659 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-03 21:26:01,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 19458 [2023-08-03 21:26:03,591 INFO L134 LiptonReduction]: Checked pairs total: 28650 [2023-08-03 21:26:03,591 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-03 21:26:03,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:26:03,609 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;@43eb92a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:26:03,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:26:03,614 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:26:03,614 INFO L124 PetriNetUnfolderBase]: 15/53 cut-off events. [2023-08-03 21:26:03,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:03,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:03,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 21:26:03,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:03,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:03,618 INFO L85 PathProgramCache]: Analyzing trace with hash -441889917, now seen corresponding path program 1 times [2023-08-03 21:26:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:03,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131564100] [2023-08-03 21:26:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:03,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:03,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:03,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131564100] [2023-08-03 21:26:03,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131564100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:03,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:03,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:26:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133779858] [2023-08-03 21:26:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:03,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:03,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:26:03,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 430 [2023-08-03 21:26:03,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:03,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 430 [2023-08-03 21:26:03,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:04,062 INFO L124 PetriNetUnfolderBase]: 579/1212 cut-off events. [2023-08-03 21:26:04,063 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:04,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1212 events. 579/1212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6864 event pairs, 465 based on Foata normal form. 213/1209 useless extension candidates. Maximal degree in co-relation 2191. Up to 1060 conditions per place. [2023-08-03 21:26:04,066 INFO L140 encePairwiseOnDemand]: 396/430 looper letters, 22 selfloop transitions, 2 changer transitions 37/66 dead transitions. [2023-08-03 21:26:04,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-08-03 21:26:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-03 21:26:04,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286821705426357 [2023-08-03 21:26:04,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-03 21:26:04,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-03 21:26:04,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:04,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-03 21:26:04,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,095 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 682 transitions. [2023-08-03 21:26:04,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-08-03 21:26:04,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:04,098 INFO L231 Difference]: Finished difference. Result has 65 places, 29 transitions, 73 flow [2023-08-03 21:26:04,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=65, PETRI_TRANSITIONS=29} [2023-08-03 21:26:04,101 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-03 21:26:04,101 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 29 transitions, 73 flow [2023-08-03 21:26:04,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:04,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:26:04,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:04,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash 584833530, now seen corresponding path program 1 times [2023-08-03 21:26:04,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:04,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175623749] [2023-08-03 21:26:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:04,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175623749] [2023-08-03 21:26:04,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175623749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743860676] [2023-08-03 21:26:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:04,192 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) [2023-08-03 21:26:04,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:26:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:04,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:26:04,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:04,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:04,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743860676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:04,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:04,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-03 21:26:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713684535] [2023-08-03 21:26:04,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:26:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:26:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:26:04,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-08-03 21:26:04,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:04,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-08-03 21:26:04,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:04,387 INFO L124 PetriNetUnfolderBase]: 54/139 cut-off events. [2023-08-03 21:26:04,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:04,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 139 events. 54/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 379 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 265. Up to 119 conditions per place. [2023-08-03 21:26:04,388 INFO L140 encePairwiseOnDemand]: 427/430 looper letters, 22 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-03 21:26:04,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 139 flow [2023-08-03 21:26:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1218 transitions. [2023-08-03 21:26:04,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2023-08-03 21:26:04,393 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1218 transitions. [2023-08-03 21:26:04,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1218 transitions. [2023-08-03 21:26:04,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:04,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1218 transitions. [2023-08-03 21:26:04,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,402 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,402 INFO L175 Difference]: Start difference. First operand has 65 places, 29 transitions, 73 flow. Second operand 6 states and 1218 transitions. [2023-08-03 21:26:04,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 139 flow [2023-08-03 21:26:04,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 135 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:04,404 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-08-03 21:26:04,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-03 21:26:04,404 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -25 predicate places. [2023-08-03 21:26:04,404 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-08-03 21:26:04,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:04,405 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:04,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:04,609 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 [2023-08-03 21:26:04,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:04,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -451628733, now seen corresponding path program 2 times [2023-08-03 21:26:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:04,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698182086] [2023-08-03 21:26:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:04,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:04,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698182086] [2023-08-03 21:26:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698182086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129802679] [2023-08-03 21:26:04,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:26:04,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:04,730 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) [2023-08-03 21:26:04,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:26:04,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:26:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:04,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 21:26:04,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:04,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129802679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:04,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-03 21:26:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631080281] [2023-08-03 21:26:04,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:04,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 21:26:04,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 21:26:04,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-03 21:26:04,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-08-03 21:26:04,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:04,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-08-03 21:26:04,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:04,936 INFO L124 PetriNetUnfolderBase]: 54/145 cut-off events. [2023-08-03 21:26:04,936 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 21:26:04,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 145 events. 54/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 374 event pairs, 45 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 256. Up to 119 conditions per place. [2023-08-03 21:26:04,937 INFO L140 encePairwiseOnDemand]: 427/430 looper letters, 22 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-08-03 21:26:04,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 207 flow [2023-08-03 21:26:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 21:26:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 21:26:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2415 transitions. [2023-08-03 21:26:04,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2023-08-03 21:26:04,943 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2415 transitions. [2023-08-03 21:26:04,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2415 transitions. [2023-08-03 21:26:04,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:04,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2415 transitions. [2023-08-03 21:26:04,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 201.25) internal successors, (2415), 12 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,954 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,954 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 2415 transitions. [2023-08-03 21:26:04,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 207 flow [2023-08-03 21:26:04,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 193 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:04,957 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-08-03 21:26:04,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-03 21:26:04,958 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-03 21:26:04,958 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-08-03 21:26:04,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:04,960 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:04,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:05,164 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 [2023-08-03 21:26:05,165 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:05,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1666983395, now seen corresponding path program 3 times [2023-08-03 21:26:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:05,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144220931] [2023-08-03 21:26:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:26:05,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:26:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:26:05,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:26:05,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:26:05,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:26:05,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:26:05,236 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-03 21:26:05,238 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:26:05,238 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:26:05,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:26:05,270 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:26:05,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:05,318 INFO L124 PetriNetUnfolderBase]: 118/611 cut-off events. [2023-08-03 21:26:05,319 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:05,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-03 21:26:05,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:05,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:05,325 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:26:05,326 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:05,326 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:05,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:05,370 INFO L124 PetriNetUnfolderBase]: 118/611 cut-off events. [2023-08-03 21:26:05,370 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:05,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-03 21:26:05,391 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-08-03 21:26:07,866 INFO L134 LiptonReduction]: Checked pairs total: 86365 [2023-08-03 21:26:07,866 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-03 21:26:07,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:26:07,868 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;@43eb92a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:26:07,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:26:07,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:26:07,874 INFO L124 PetriNetUnfolderBase]: 52/154 cut-off events. [2023-08-03 21:26:07,874 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 21:26:07,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:07,874 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:07,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:07,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash 265766007, now seen corresponding path program 1 times [2023-08-03 21:26:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:07,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760155982] [2023-08-03 21:26:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:07,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:07,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760155982] [2023-08-03 21:26:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760155982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:07,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:26:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40770620] [2023-08-03 21:26:07,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:07,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:07,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:26:07,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-08-03 21:26:07,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:07,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:07,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-08-03 21:26:07,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:09,644 INFO L124 PetriNetUnfolderBase]: 19961/30642 cut-off events. [2023-08-03 21:26:09,644 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-03 21:26:09,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 212680 event pairs, 17166 based on Foata normal form. 5462/30473 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-08-03 21:26:09,796 INFO L140 encePairwiseOnDemand]: 516/559 looper letters, 40 selfloop transitions, 2 changer transitions 42/93 dead transitions. [2023-08-03 21:26:09,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-08-03 21:26:09,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253428741800835 [2023-08-03 21:26:09,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-08-03 21:26:09,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-08-03 21:26:09,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:09,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-08-03 21:26:09,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,818 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 881 transitions. [2023-08-03 21:26:09,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:09,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:09,822 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 124 flow [2023-08-03 21:26:09,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2023-08-03 21:26:09,823 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-03 21:26:09,823 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 124 flow [2023-08-03 21:26:09,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:09,823 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:09,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:26:09,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:09,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1272874103, now seen corresponding path program 1 times [2023-08-03 21:26:09,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:09,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667757215] [2023-08-03 21:26:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:09,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:09,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667757215] [2023-08-03 21:26:09,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667757215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261059616] [2023-08-03 21:26:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:09,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:09,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:09,885 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) [2023-08-03 21:26:09,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:26:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:09,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:26:09,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:09,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:09,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261059616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:09,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:09,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-03 21:26:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508234981] [2023-08-03 21:26:09,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:09,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:26:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:26:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:26:10,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-08-03 21:26:10,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 255.71428571428572) internal successors, (1790), 7 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:10,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-08-03 21:26:10,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:10,205 INFO L124 PetriNetUnfolderBase]: 2090/3401 cut-off events. [2023-08-03 21:26:10,205 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-03 21:26:10,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 3401 events. 2090/3401 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18278 event pairs, 1833 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-08-03 21:26:10,220 INFO L140 encePairwiseOnDemand]: 556/559 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-08-03 21:26:10,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-08-03 21:26:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1572 transitions. [2023-08-03 21:26:10,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46869409660107336 [2023-08-03 21:26:10,223 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1572 transitions. [2023-08-03 21:26:10,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1572 transitions. [2023-08-03 21:26:10,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:10,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1572 transitions. [2023-08-03 21:26:10,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,230 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,230 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 124 flow. Second operand 6 states and 1572 transitions. [2023-08-03 21:26:10,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-08-03 21:26:10,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:10,231 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-08-03 21:26:10,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-03 21:26:10,232 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -27 predicate places. [2023-08-03 21:26:10,232 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-08-03 21:26:10,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 255.71428571428572) internal successors, (1790), 7 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:10,233 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:10,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:10,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:10,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:10,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:10,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2007450743, now seen corresponding path program 2 times [2023-08-03 21:26:10,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:10,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198238275] [2023-08-03 21:26:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:10,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198238275] [2023-08-03 21:26:10,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198238275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404447551] [2023-08-03 21:26:10,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:26:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:10,538 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) [2023-08-03 21:26:10,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:26:10,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:26:10,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:10,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 21:26:10,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404447551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:10,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:10,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-03 21:26:10,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189009536] [2023-08-03 21:26:10,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:10,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 21:26:10,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 21:26:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-03 21:26:10,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-08-03 21:26:10,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 255.3846153846154) internal successors, (3320), 13 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:10,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-08-03 21:26:10,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:10,949 INFO L124 PetriNetUnfolderBase]: 2090/3407 cut-off events. [2023-08-03 21:26:10,949 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-03 21:26:10,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 3407 events. 2090/3407 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18322 event pairs, 1833 based on Foata normal form. 6/2698 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-08-03 21:26:10,959 INFO L140 encePairwiseOnDemand]: 556/559 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-08-03 21:26:10,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-08-03 21:26:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 21:26:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 21:26:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3105 transitions. [2023-08-03 21:26:10,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46288014311270126 [2023-08-03 21:26:10,964 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3105 transitions. [2023-08-03 21:26:10,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3105 transitions. [2023-08-03 21:26:10,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:10,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3105 transitions. [2023-08-03 21:26:10,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.75) internal successors, (3105), 12 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,976 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,976 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 3105 transitions. [2023-08-03 21:26:10,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-08-03 21:26:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:10,978 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-08-03 21:26:10,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-03 21:26:10,978 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -11 predicate places. [2023-08-03 21:26:10,978 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-08-03 21:26:10,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 255.3846153846154) internal successors, (3320), 13 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:10,980 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:10,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 21:26:11,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:11,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:11,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1872804745, now seen corresponding path program 3 times [2023-08-03 21:26:11,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:11,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633680893] [2023-08-03 21:26:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-03 21:26:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633680893] [2023-08-03 21:26:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633680893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913109689] [2023-08-03 21:26:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:26:11,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:11,227 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) [2023-08-03 21:26:11,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:26:11,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 21:26:11,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:11,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:26:11,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-03 21:26:11,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:26:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913109689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:11,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:26:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:26:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550355471] [2023-08-03 21:26:11,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:11,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:26:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:11,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:26:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:26:11,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-08-03 21:26:11,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:11,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-08-03 21:26:11,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:11,545 INFO L124 PetriNetUnfolderBase]: 1443/2389 cut-off events. [2023-08-03 21:26:11,545 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-03 21:26:11,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4822 conditions, 2389 events. 1443/2389 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12540 event pairs, 0 based on Foata normal form. 0/2063 useless extension candidates. Maximal degree in co-relation 4745. Up to 1665 conditions per place. [2023-08-03 21:26:11,548 INFO L140 encePairwiseOnDemand]: 555/559 looper letters, 0 selfloop transitions, 0 changer transitions 112/112 dead transitions. [2023-08-03 21:26:11,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 112 transitions, 534 flow [2023-08-03 21:26:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:26:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:26:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1365 transitions. [2023-08-03 21:26:11,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2023-08-03 21:26:11,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1365 transitions. [2023-08-03 21:26:11,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1365 transitions. [2023-08-03 21:26:11,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:11,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1365 transitions. [2023-08-03 21:26:11,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,557 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 224 flow. Second operand 5 states and 1365 transitions. [2023-08-03 21:26:11,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 112 transitions, 534 flow [2023-08-03 21:26:11,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 485 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-03 21:26:11,559 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-03 21:26:11,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-03 21:26:11,560 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -14 predicate places. [2023-08-03 21:26:11,560 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-03 21:26:11,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:26:11,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:11,764 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 [2023-08-03 21:26:11,765 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-03 21:26:11,765 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:26:11,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:11,809 INFO L124 PetriNetUnfolderBase]: 118/611 cut-off events. [2023-08-03 21:26:11,810 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:11,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-03 21:26:11,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:11,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:11,818 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:26:11,818 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:11,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:11,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-03 21:26:11,856 INFO L124 PetriNetUnfolderBase]: 118/611 cut-off events. [2023-08-03 21:26:11,856 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:11,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-03 21:26:11,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-08-03 21:26:14,216 INFO L134 LiptonReduction]: Checked pairs total: 77598 [2023-08-03 21:26:14,217 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-03 21:26:14,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:26:14,218 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;@43eb92a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:26:14,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 21:26:14,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:26:14,220 INFO L124 PetriNetUnfolderBase]: 9/34 cut-off events. [2023-08-03 21:26:14,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:14,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:14,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:14,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:14,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash 91818024, now seen corresponding path program 1 times [2023-08-03 21:26:14,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:14,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731802490] [2023-08-03 21:26:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:14,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:14,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731802490] [2023-08-03 21:26:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731802490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:14,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:14,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:26:14,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399926121] [2023-08-03 21:26:14,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:14,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:26:14,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-08-03 21:26:14,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:14,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:14,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-08-03 21:26:14,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:15,655 INFO L124 PetriNetUnfolderBase]: 19961/30642 cut-off events. [2023-08-03 21:26:15,655 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-03 21:26:15,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 212683 event pairs, 17166 based on Foata normal form. 5462/30473 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-08-03 21:26:15,789 INFO L140 encePairwiseOnDemand]: 516/559 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-03 21:26:15,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-08-03 21:26:15,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253428741800835 [2023-08-03 21:26:15,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-08-03 21:26:15,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-08-03 21:26:15,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:15,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-08-03 21:26:15,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:15,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:15,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:15,795 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 881 transitions. [2023-08-03 21:26:15,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:15,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:15,796 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2023-08-03 21:26:15,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-08-03 21:26:15,797 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-03 21:26:15,797 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2023-08-03 21:26:15,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:15,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:15,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:15,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 21:26:15,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:15,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 748030052, now seen corresponding path program 1 times [2023-08-03 21:26:15,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:15,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487522862] [2023-08-03 21:26:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:15,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:15,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487522862] [2023-08-03 21:26:15,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487522862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202414007] [2023-08-03 21:26:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:15,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:15,833 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) [2023-08-03 21:26:15,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 21:26:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:15,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:26:15,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:26:15,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:26:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202414007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:26:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:26:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106102657] [2023-08-03 21:26:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:15,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:26:15,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-08-03 21:26:15,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:15,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:15,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-08-03 21:26:15,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:17,249 INFO L124 PetriNetUnfolderBase]: 19644/30266 cut-off events. [2023-08-03 21:26:17,250 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-03 21:26:17,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58589 conditions, 30266 events. 19644/30266 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 213424 event pairs, 8256 based on Foata normal form. 0/24593 useless extension candidates. Maximal degree in co-relation 58576. Up to 28177 conditions per place. [2023-08-03 21:26:17,434 INFO L140 encePairwiseOnDemand]: 556/559 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-03 21:26:17,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-08-03 21:26:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 858 transitions. [2023-08-03 21:26:17,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2023-08-03 21:26:17,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 858 transitions. [2023-08-03 21:26:17,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 858 transitions. [2023-08-03 21:26:17,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:17,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 858 transitions. [2023-08-03 21:26:17,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,440 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 858 transitions. [2023-08-03 21:26:17,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-08-03 21:26:17,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:17,442 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2023-08-03 21:26:17,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-03 21:26:17,443 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-08-03 21:26:17,444 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2023-08-03 21:26:17,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:17,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:17,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:17,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:17,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -410389427, now seen corresponding path program 1 times [2023-08-03 21:26:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859611617] [2023-08-03 21:26:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:17,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:17,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859611617] [2023-08-03 21:26:17,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859611617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:17,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763847643] [2023-08-03 21:26:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:17,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:17,679 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) [2023-08-03 21:26:17,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 21:26:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:17,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:26:17,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:17,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:17,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763847643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:17,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:17,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-03 21:26:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115043194] [2023-08-03 21:26:17,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:17,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:26:17,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:26:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:26:17,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-08-03 21:26:17,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 256.14285714285717) internal successors, (1793), 7 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:17,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-08-03 21:26:17,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:19,410 INFO L124 PetriNetUnfolderBase]: 20049/30556 cut-off events. [2023-08-03 21:26:19,411 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-08-03 21:26:19,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59459 conditions, 30556 events. 20049/30556 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 209725 event pairs, 17166 based on Foata normal form. 3/25146 useless extension candidates. Maximal degree in co-relation 59431. Up to 28195 conditions per place. [2023-08-03 21:26:19,533 INFO L140 encePairwiseOnDemand]: 556/559 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-03 21:26:19,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-08-03 21:26:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1605 transitions. [2023-08-03 21:26:19,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785330948121646 [2023-08-03 21:26:19,537 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1605 transitions. [2023-08-03 21:26:19,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1605 transitions. [2023-08-03 21:26:19,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:19,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1605 transitions. [2023-08-03 21:26:19,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.5) internal successors, (1605), 6 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:19,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:19,542 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:19,543 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1605 transitions. [2023-08-03 21:26:19,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-08-03 21:26:19,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:19,544 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2023-08-03 21:26:19,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-03 21:26:19,545 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-08-03 21:26:19,545 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2023-08-03 21:26:19,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 256.14285714285717) internal successors, (1793), 7 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:19,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:19,545 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:19,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:19,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:19,768 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:19,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:19,769 INFO L85 PathProgramCache]: Analyzing trace with hash 213418513, now seen corresponding path program 2 times [2023-08-03 21:26:19,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:19,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224921125] [2023-08-03 21:26:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:19,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:19,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:19,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224921125] [2023-08-03 21:26:19,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224921125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:19,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034825361] [2023-08-03 21:26:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:26:19,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:19,839 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) [2023-08-03 21:26:19,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 21:26:19,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-03 21:26:19,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:19,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-03 21:26:19,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:19,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-03 21:26:19,966 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:26:19,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:26:19,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 21:26:20,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:26:20,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034825361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:20,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:26:20,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-03 21:26:20,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78969273] [2023-08-03 21:26:20,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:20,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:26:20,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:26:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-03 21:26:20,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 559 [2023-08-03 21:26:20,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 243.66666666666666) internal successors, (1462), 6 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:20,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:20,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 559 [2023-08-03 21:26:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:22,284 INFO L124 PetriNetUnfolderBase]: 25470/39927 cut-off events. [2023-08-03 21:26:22,284 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2023-08-03 21:26:22,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77981 conditions, 39927 events. 25470/39927 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 298803 event pairs, 4175 based on Foata normal form. 0/32830 useless extension candidates. Maximal degree in co-relation 77945. Up to 27989 conditions per place. [2023-08-03 21:26:22,428 INFO L140 encePairwiseOnDemand]: 549/559 looper letters, 193 selfloop transitions, 16 changer transitions 0/227 dead transitions. [2023-08-03 21:26:22,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 227 transitions, 968 flow [2023-08-03 21:26:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1658 transitions. [2023-08-03 21:26:22,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433512224209897 [2023-08-03 21:26:22,431 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1658 transitions. [2023-08-03 21:26:22,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1658 transitions. [2023-08-03 21:26:22,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:22,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1658 transitions. [2023-08-03 21:26:22,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.3333333333333) internal successors, (1658), 6 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:22,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:22,438 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:22,438 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1658 transitions. [2023-08-03 21:26:22,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 227 transitions, 968 flow [2023-08-03 21:26:22,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 227 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:22,441 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2023-08-03 21:26:22,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-08-03 21:26:22,441 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2023-08-03 21:26:22,441 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2023-08-03 21:26:22,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 243.66666666666666) internal successors, (1462), 6 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:22,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:22,442 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:22,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 21:26:22,646 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,SelfDestructingSolverStorable11 [2023-08-03 21:26:22,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:22,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1499624704, now seen corresponding path program 1 times [2023-08-03 21:26:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:22,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877673755] [2023-08-03 21:26:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:22,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 21:26:22,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:22,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877673755] [2023-08-03 21:26:22,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877673755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:22,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469468798] [2023-08-03 21:26:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:22,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:22,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:22,707 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) [2023-08-03 21:26:22,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 21:26:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:22,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 21:26:22,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:26:22,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:26:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469468798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:22,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:22,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-03 21:26:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696007685] [2023-08-03 21:26:22,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:22,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-03 21:26:22,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-03 21:26:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-03 21:26:22,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 559 [2023-08-03 21:26:22,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 251.92857142857142) internal successors, (3527), 14 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:22,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:22,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 559 [2023-08-03 21:26:22,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:25,327 INFO L124 PetriNetUnfolderBase]: 25466/39971 cut-off events. [2023-08-03 21:26:25,327 INFO L125 PetriNetUnfolderBase]: For 7968/7972 co-relation queries the response was YES. [2023-08-03 21:26:25,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85431 conditions, 39971 events. 25466/39971 cut-off events. For 7968/7972 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 300836 event pairs, 1096 based on Foata normal form. 32/35261 useless extension candidates. Maximal degree in co-relation 85372. Up to 34783 conditions per place. [2023-08-03 21:26:25,569 INFO L140 encePairwiseOnDemand]: 553/559 looper letters, 141 selfloop transitions, 15 changer transitions 0/174 dead transitions. [2023-08-03 21:26:25,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 849 flow [2023-08-03 21:26:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 21:26:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 21:26:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3643 transitions. [2023-08-03 21:26:25,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46549961666240736 [2023-08-03 21:26:25,576 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3643 transitions. [2023-08-03 21:26:25,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3643 transitions. [2023-08-03 21:26:25,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:25,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3643 transitions. [2023-08-03 21:26:25,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 260.2142857142857) internal successors, (3643), 14 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:25,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:25,588 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:25,588 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3643 transitions. [2023-08-03 21:26:25,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 849 flow [2023-08-03 21:26:25,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 849 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:25,601 INFO L231 Difference]: Finished difference. Result has 122 places, 118 transitions, 427 flow [2023-08-03 21:26:25,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=122, PETRI_TRANSITIONS=118} [2023-08-03 21:26:25,601 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 35 predicate places. [2023-08-03 21:26:25,602 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 118 transitions, 427 flow [2023-08-03 21:26:25,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 251.92857142857142) internal successors, (3527), 14 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:25,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:25,602 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:25,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 21:26:25,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 21:26:25,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:25,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1230431081, now seen corresponding path program 1 times [2023-08-03 21:26:25,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:25,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622942753] [2023-08-03 21:26:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622942753] [2023-08-03 21:26:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622942753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733281151] [2023-08-03 21:26:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:25,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:25,993 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) [2023-08-03 21:26:25,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 21:26:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:26,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-03 21:26:26,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:26,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-03 21:26:26,127 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:26:26,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:26:26,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:26,156 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:26,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:34,267 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_387 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_387) |c_~#cache~0.base|))) is different from false [2023-08-03 21:26:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-03 21:26:34,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733281151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:34,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-03 21:26:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614432899] [2023-08-03 21:26:34,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:34,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 21:26:34,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 21:26:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=79, Unknown=3, NotChecked=18, Total=132 [2023-08-03 21:26:34,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 559 [2023-08-03 21:26:34,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 118 transitions, 427 flow. Second operand has 12 states, 12 states have (on average 211.91666666666666) internal successors, (2543), 12 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:34,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:34,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 559 [2023-08-03 21:26:34,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:39,622 INFO L124 PetriNetUnfolderBase]: 32565/50090 cut-off events. [2023-08-03 21:26:39,622 INFO L125 PetriNetUnfolderBase]: For 15204/15208 co-relation queries the response was YES. [2023-08-03 21:26:39,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110427 conditions, 50090 events. 32565/50090 cut-off events. For 15204/15208 co-relation queries the response was YES. Maximal size of possible extension queue 1457. Compared 373420 event pairs, 4979 based on Foata normal form. 4/44193 useless extension candidates. Maximal degree in co-relation 110353. Up to 30277 conditions per place. [2023-08-03 21:26:39,887 INFO L140 encePairwiseOnDemand]: 545/559 looper letters, 253 selfloop transitions, 33 changer transitions 0/302 dead transitions. [2023-08-03 21:26:39,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 302 transitions, 1509 flow [2023-08-03 21:26:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:26:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:26:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1725 transitions. [2023-08-03 21:26:39,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44083823153590596 [2023-08-03 21:26:39,890 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1725 transitions. [2023-08-03 21:26:39,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1725 transitions. [2023-08-03 21:26:39,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:39,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1725 transitions. [2023-08-03 21:26:39,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 246.42857142857142) internal successors, (1725), 7 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 559.0) internal successors, (4472), 8 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,895 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 559.0) internal successors, (4472), 8 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,895 INFO L175 Difference]: Start difference. First operand has 122 places, 118 transitions, 427 flow. Second operand 7 states and 1725 transitions. [2023-08-03 21:26:39,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 302 transitions, 1509 flow [2023-08-03 21:26:39,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 302 transitions, 1432 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-03 21:26:39,913 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 589 flow [2023-08-03 21:26:39,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=589, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2023-08-03 21:26:39,914 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 37 predicate places. [2023-08-03 21:26:39,914 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 589 flow [2023-08-03 21:26:39,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.91666666666666) internal successors, (2543), 12 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:39,914 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:39,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:40,118 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,SelfDestructingSolverStorable13 [2023-08-03 21:26:40,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:40,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1202409528, now seen corresponding path program 1 times [2023-08-03 21:26:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:40,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387136505] [2023-08-03 21:26:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:40,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387136505] [2023-08-03 21:26:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387136505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093090869] [2023-08-03 21:26:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:40,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:40,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:40,314 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) [2023-08-03 21:26:40,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 21:26:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:40,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-03 21:26:40,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:40,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-03 21:26:40,453 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:26:40,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:26:40,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:40,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:40,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:48,553 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_452 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_452) |c_~#cache~0.base|))) is different from false [2023-08-03 21:26:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-03 21:26:48,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093090869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:48,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:48,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-03 21:26:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399314073] [2023-08-03 21:26:48,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:48,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 21:26:48,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:48,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 21:26:48,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=79, Unknown=3, NotChecked=18, Total=132 [2023-08-03 21:26:48,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 559 [2023-08-03 21:26:48,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 589 flow. Second operand has 12 states, 12 states have (on average 212.08333333333334) internal successors, (2545), 12 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:48,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:48,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 559 [2023-08-03 21:26:48,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:53,426 INFO L124 PetriNetUnfolderBase]: 47180/72902 cut-off events. [2023-08-03 21:26:53,426 INFO L125 PetriNetUnfolderBase]: For 44958/44961 co-relation queries the response was YES. [2023-08-03 21:26:53,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177123 conditions, 72902 events. 47180/72902 cut-off events. For 44958/44961 co-relation queries the response was YES. Maximal size of possible extension queue 1941. Compared 558798 event pairs, 9979 based on Foata normal form. 3/67367 useless extension candidates. Maximal degree in co-relation 166688. Up to 38369 conditions per place. [2023-08-03 21:26:53,942 INFO L140 encePairwiseOnDemand]: 547/559 looper letters, 270 selfloop transitions, 49 changer transitions 0/335 dead transitions. [2023-08-03 21:26:53,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 335 transitions, 1904 flow [2023-08-03 21:26:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:26:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:26:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1726 transitions. [2023-08-03 21:26:53,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44109378993099924 [2023-08-03 21:26:53,946 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1726 transitions. [2023-08-03 21:26:53,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1726 transitions. [2023-08-03 21:26:53,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:53,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1726 transitions. [2023-08-03 21:26:53,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 246.57142857142858) internal successors, (1726), 7 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:53,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 559.0) internal successors, (4472), 8 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:53,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 559.0) internal successors, (4472), 8 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:53,951 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 589 flow. Second operand 7 states and 1726 transitions. [2023-08-03 21:26:53,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 335 transitions, 1904 flow [2023-08-03 21:26:54,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 335 transitions, 1904 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:54,066 INFO L231 Difference]: Finished difference. Result has 134 places, 164 transitions, 989 flow [2023-08-03 21:26:54,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=989, PETRI_PLACES=134, PETRI_TRANSITIONS=164} [2023-08-03 21:26:54,066 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 47 predicate places. [2023-08-03 21:26:54,066 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 164 transitions, 989 flow [2023-08-03 21:26:54,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 212.08333333333334) internal successors, (2545), 12 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:54,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:54,067 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:54,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:54,271 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,SelfDestructingSolverStorable14 [2023-08-03 21:26:54,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:54,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1369936448, now seen corresponding path program 1 times [2023-08-03 21:26:54,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:54,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257189310] [2023-08-03 21:26:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-03 21:26:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257189310] [2023-08-03 21:26:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257189310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:54,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:54,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:26:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413792914] [2023-08-03 21:26:54,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:26:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:26:54,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:26:54,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 559 [2023-08-03 21:26:54,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 164 transitions, 989 flow. Second operand has 5 states, 5 states have (on average 230.4) internal successors, (1152), 5 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:54,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:54,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 559 [2023-08-03 21:26:54,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:27:03,782 INFO L124 PetriNetUnfolderBase]: 79371/126287 cut-off events. [2023-08-03 21:27:03,782 INFO L125 PetriNetUnfolderBase]: For 137108/137153 co-relation queries the response was YES. [2023-08-03 21:27:04,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333002 conditions, 126287 events. 79371/126287 cut-off events. For 137108/137153 co-relation queries the response was YES. Maximal size of possible extension queue 2725. Compared 1074624 event pairs, 21143 based on Foata normal form. 9182/127540 useless extension candidates. Maximal degree in co-relation 313243. Up to 68003 conditions per place. [2023-08-03 21:27:04,813 INFO L140 encePairwiseOnDemand]: 530/559 looper letters, 294 selfloop transitions, 43 changer transitions 0/350 dead transitions. [2023-08-03 21:27:04,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 350 transitions, 2831 flow [2023-08-03 21:27:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:27:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:27:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1347 transitions. [2023-08-03 21:27:04,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48193202146690517 [2023-08-03 21:27:04,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1347 transitions. [2023-08-03 21:27:04,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1347 transitions. [2023-08-03 21:27:04,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:27:04,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1347 transitions. [2023-08-03 21:27:04,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 269.4) internal successors, (1347), 5 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:04,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:04,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:04,820 INFO L175 Difference]: Start difference. First operand has 134 places, 164 transitions, 989 flow. Second operand 5 states and 1347 transitions. [2023-08-03 21:27:04,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 350 transitions, 2831 flow [2023-08-03 21:27:05,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 350 transitions, 2831 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:27:05,233 INFO L231 Difference]: Finished difference. Result has 139 places, 194 transitions, 1222 flow [2023-08-03 21:27:05,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1222, PETRI_PLACES=139, PETRI_TRANSITIONS=194} [2023-08-03 21:27:05,234 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 52 predicate places. [2023-08-03 21:27:05,234 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 194 transitions, 1222 flow [2023-08-03 21:27:05,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.4) internal successors, (1152), 5 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:05,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:27:05,234 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:27:05,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 21:27:05,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:27:05,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:27:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1856925267, now seen corresponding path program 1 times [2023-08-03 21:27:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:27:05,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47635133] [2023-08-03 21:27:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:27:05,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:27:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:27:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:27:05,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:27:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47635133] [2023-08-03 21:27:05,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47635133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:27:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264260684] [2023-08-03 21:27:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:27:05,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:27:05,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:27:05,683 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) [2023-08-03 21:27:05,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 21:27:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:27:05,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-03 21:27:05,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:27:05,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 21:27:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:27:05,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:27:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264260684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:27:05,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:27:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-03 21:27:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803950327] [2023-08-03 21:27:05,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:27:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:27:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:27:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:27:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-03 21:27:05,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 559 [2023-08-03 21:27:05,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 194 transitions, 1222 flow. Second operand has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:05,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:27:05,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 559 [2023-08-03 21:27:05,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:27:27,481 INFO L124 PetriNetUnfolderBase]: 157158/253118 cut-off events. [2023-08-03 21:27:27,481 INFO L125 PetriNetUnfolderBase]: For 358356/359187 co-relation queries the response was YES. [2023-08-03 21:27:28,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784846 conditions, 253118 events. 157158/253118 cut-off events. For 358356/359187 co-relation queries the response was YES. Maximal size of possible extension queue 6196. Compared 2406494 event pairs, 56739 based on Foata normal form. 2930/236877 useless extension candidates. Maximal degree in co-relation 743553. Up to 110178 conditions per place. [2023-08-03 21:27:29,682 INFO L140 encePairwiseOnDemand]: 538/559 looper letters, 467 selfloop transitions, 52 changer transitions 0/537 dead transitions. [2023-08-03 21:27:29,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 537 transitions, 4502 flow [2023-08-03 21:27:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:27:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:27:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1652 transitions. [2023-08-03 21:27:29,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49254621347644606 [2023-08-03 21:27:29,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1652 transitions. [2023-08-03 21:27:29,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1652 transitions. [2023-08-03 21:27:29,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:27:29,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1652 transitions. [2023-08-03 21:27:29,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 275.3333333333333) internal successors, (1652), 6 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:29,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:29,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:29,704 INFO L175 Difference]: Start difference. First operand has 139 places, 194 transitions, 1222 flow. Second operand 6 states and 1652 transitions. [2023-08-03 21:27:29,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 537 transitions, 4502 flow [2023-08-03 21:27:31,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 537 transitions, 4501 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:27:31,612 INFO L231 Difference]: Finished difference. Result has 146 places, 242 transitions, 1750 flow [2023-08-03 21:27:31,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1750, PETRI_PLACES=146, PETRI_TRANSITIONS=242} [2023-08-03 21:27:31,612 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 59 predicate places. [2023-08-03 21:27:31,612 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 242 transitions, 1750 flow [2023-08-03 21:27:31,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:31,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:27:31,613 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:27:31,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-03 21:27:31,816 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,SelfDestructingSolverStorable16 [2023-08-03 21:27:31,817 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:27:31,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:27:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1602992775, now seen corresponding path program 2 times [2023-08-03 21:27:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:27:31,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317317917] [2023-08-03 21:27:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:27:31,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:27:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:27:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-03 21:27:32,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:27:32,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317317917] [2023-08-03 21:27:32,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317317917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:27:32,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:27:32,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:27:32,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116072893] [2023-08-03 21:27:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:27:32,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:27:32,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:27:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:27:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:27:32,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 559 [2023-08-03 21:27:32,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 242 transitions, 1750 flow. Second operand has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:32,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:27:32,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 559 [2023-08-03 21:27:32,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:28:24,255 INFO L124 PetriNetUnfolderBase]: 314751/511363 cut-off events. [2023-08-03 21:28:24,255 INFO L125 PetriNetUnfolderBase]: For 1023244/1025182 co-relation queries the response was YES. [2023-08-03 21:28:27,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1775077 conditions, 511363 events. 314751/511363 cut-off events. For 1023244/1025182 co-relation queries the response was YES. Maximal size of possible extension queue 13164. Compared 5345466 event pairs, 117183 based on Foata normal form. 4182/474268 useless extension candidates. Maximal degree in co-relation 1671854. Up to 239981 conditions per place. [2023-08-03 21:28:29,306 INFO L140 encePairwiseOnDemand]: 550/559 looper letters, 590 selfloop transitions, 34 changer transitions 0/642 dead transitions. [2023-08-03 21:28:29,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 642 transitions, 5909 flow [2023-08-03 21:28:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:28:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:28:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1706 transitions. [2023-08-03 21:28:29,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086463923673226 [2023-08-03 21:28:29,308 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1706 transitions. [2023-08-03 21:28:29,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1706 transitions. [2023-08-03 21:28:29,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:28:29,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1706 transitions. [2023-08-03 21:28:29,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.3333333333333) internal successors, (1706), 6 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:29,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:29,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:29,312 INFO L175 Difference]: Start difference. First operand has 146 places, 242 transitions, 1750 flow. Second operand 6 states and 1706 transitions. [2023-08-03 21:28:29,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 642 transitions, 5909 flow [2023-08-03 21:28:32,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 642 transitions, 5896 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:28:32,615 INFO L231 Difference]: Finished difference. Result has 152 places, 269 transitions, 2121 flow [2023-08-03 21:28:32,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2121, PETRI_PLACES=152, PETRI_TRANSITIONS=269} [2023-08-03 21:28:32,616 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 65 predicate places. [2023-08-03 21:28:32,616 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 269 transitions, 2121 flow [2023-08-03 21:28:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:32,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:28:32,630 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:28:32,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 21:28:32,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:28:32,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:28:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 856030177, now seen corresponding path program 1 times [2023-08-03 21:28:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:28:32,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083227197] [2023-08-03 21:28:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:28:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:28:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:28:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:28:33,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:28:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083227197] [2023-08-03 21:28:33,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083227197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:28:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011469475] [2023-08-03 21:28:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:28:33,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:28:33,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:28:33,109 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) [2023-08-03 21:28:33,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 21:28:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:28:33,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-03 21:28:33,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:28:33,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-03 21:28:33,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:28:33,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 21:28:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:28:33,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 21:28:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:28:33,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:28:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011469475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:28:33,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:28:33,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-03 21:28:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508015678] [2023-08-03 21:28:33,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:28:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:28:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:28:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:28:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-03 21:28:33,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 559 [2023-08-03 21:28:33,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 269 transitions, 2121 flow. Second operand has 7 states, 7 states have (on average 235.57142857142858) internal successors, (1649), 7 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:33,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:28:33,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 559 [2023-08-03 21:28:33,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:29:37,307 INFO L124 PetriNetUnfolderBase]: 357738/581947 cut-off events. [2023-08-03 21:29:37,307 INFO L125 PetriNetUnfolderBase]: For 1443136/1445809 co-relation queries the response was YES. [2023-08-03 21:29:40,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2134929 conditions, 581947 events. 357738/581947 cut-off events. For 1443136/1445809 co-relation queries the response was YES. Maximal size of possible extension queue 15636. Compared 6182513 event pairs, 145541 based on Foata normal form. 958/536046 useless extension candidates. Maximal degree in co-relation 2015933. Up to 238206 conditions per place. [2023-08-03 21:29:42,575 INFO L140 encePairwiseOnDemand]: 551/559 looper letters, 576 selfloop transitions, 50 changer transitions 0/644 dead transitions. [2023-08-03 21:29:42,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 644 transitions, 6236 flow [2023-08-03 21:29:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:29:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:29:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1652 transitions. [2023-08-03 21:29:42,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49254621347644606 [2023-08-03 21:29:42,577 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1652 transitions. [2023-08-03 21:29:42,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1652 transitions. [2023-08-03 21:29:42,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:29:42,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1652 transitions. [2023-08-03 21:29:42,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 275.3333333333333) internal successors, (1652), 6 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:42,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:42,581 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:42,581 INFO L175 Difference]: Start difference. First operand has 152 places, 269 transitions, 2121 flow. Second operand 6 states and 1652 transitions. [2023-08-03 21:29:42,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 644 transitions, 6236 flow [2023-08-03 21:29:49,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 644 transitions, 6235 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:29:49,524 INFO L231 Difference]: Finished difference. Result has 158 places, 292 transitions, 2533 flow [2023-08-03 21:29:49,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2533, PETRI_PLACES=158, PETRI_TRANSITIONS=292} [2023-08-03 21:29:49,525 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 71 predicate places. [2023-08-03 21:29:49,525 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 292 transitions, 2533 flow [2023-08-03 21:29:49,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.57142857142858) internal successors, (1649), 7 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:49,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:29:49,525 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:29:49,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-03 21:29:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:29:49,730 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:29:49,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:29:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash -601242327, now seen corresponding path program 3 times [2023-08-03 21:29:49,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:29:49,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626464464] [2023-08-03 21:29:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:29:49,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:29:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:29:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-03 21:29:49,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:29:49,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626464464] [2023-08-03 21:29:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626464464] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:29:49,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:29:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:29:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657835799] [2023-08-03 21:29:49,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:29:49,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:29:49,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:29:49,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:29:49,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:29:50,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 559 [2023-08-03 21:29:50,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 292 transitions, 2533 flow. Second operand has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:50,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:29:50,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 559 [2023-08-03 21:29:50,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:31:11,248 INFO L124 PetriNetUnfolderBase]: 451950/738056 cut-off events. [2023-08-03 21:31:11,248 INFO L125 PetriNetUnfolderBase]: For 2236597/2240407 co-relation queries the response was YES. [2023-08-03 21:31:15,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826885 conditions, 738056 events. 451950/738056 cut-off events. For 2236597/2240407 co-relation queries the response was YES. Maximal size of possible extension queue 20345. Compared 8085791 event pairs, 195254 based on Foata normal form. 1412/678840 useless extension candidates. Maximal degree in co-relation 2672567. Up to 285823 conditions per place. [2023-08-03 21:31:19,035 INFO L140 encePairwiseOnDemand]: 551/559 looper letters, 724 selfloop transitions, 55 changer transitions 0/797 dead transitions. [2023-08-03 21:31:19,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 797 transitions, 8248 flow [2023-08-03 21:31:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:31:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:31:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1715 transitions. [2023-08-03 21:31:19,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113297555158021 [2023-08-03 21:31:19,037 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1715 transitions. [2023-08-03 21:31:19,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1715 transitions. [2023-08-03 21:31:19,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:31:19,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1715 transitions. [2023-08-03 21:31:19,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.8333333333333) internal successors, (1715), 6 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:31:19,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:31:19,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:31:19,042 INFO L175 Difference]: Start difference. First operand has 158 places, 292 transitions, 2533 flow. Second operand 6 states and 1715 transitions. [2023-08-03 21:31:19,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 797 transitions, 8248 flow [2023-08-03 21:31:47,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 797 transitions, 8191 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-03 21:31:47,124 INFO L231 Difference]: Finished difference. Result has 164 places, 328 transitions, 3225 flow [2023-08-03 21:31:47,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3225, PETRI_PLACES=164, PETRI_TRANSITIONS=328} [2023-08-03 21:31:47,124 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 77 predicate places. [2023-08-03 21:31:47,125 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 328 transitions, 3225 flow [2023-08-03 21:31:47,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:31:47,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:31:47,125 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:31:47,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-03 21:31:47,125 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:31:47,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:31:47,125 INFO L85 PathProgramCache]: Analyzing trace with hash -567996443, now seen corresponding path program 2 times [2023-08-03 21:31:47,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:31:47,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872390622] [2023-08-03 21:31:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:31:47,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:31:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:31:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:31:47,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:31:47,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872390622] [2023-08-03 21:31:47,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872390622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:31:47,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735774221] [2023-08-03 21:31:47,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:31:47,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:31:47,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:31:47,561 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) [2023-08-03 21:31:47,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 21:31:47,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-03 21:31:47,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:31:47,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-03 21:31:47,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:31:47,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-03 21:31:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:31:47,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:31:47,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735774221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:31:47,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:31:47,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-03 21:31:47,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696414667] [2023-08-03 21:31:47,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:31:47,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:31:47,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:31:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:31:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-03 21:31:47,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 559 [2023-08-03 21:31:47,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 328 transitions, 3225 flow. Second operand has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:31:47,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:31:47,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 559 [2023-08-03 21:31:47,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand