/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_42-trylock2_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:25:18,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:25:18,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:25:18,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:25:18,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:25:18,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:25:18,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:25:18,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:25:18,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:25:18,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:25:18,630 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:25:18,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:25:18,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:25:18,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:25:18,632 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:25:18,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:25:18,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:25:18,632 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:25:18,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:25:18,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:25:18,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:25:18,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:25:18,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:25:18,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:25:18,634 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:25:18,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:25:18,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:25:18,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:25:18,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:25:18,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:25:18,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:25:18,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:25:18,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:25:18,636 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:25:18,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:25:18,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:25:18,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:25:18,637 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:25:18,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:25:18,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:25:18,637 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:25:18,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:25:18,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:25:18,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:25:18,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:25:18,841 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:25:18,841 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:25:18,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_42-trylock2_racefree_bound2.i [2023-08-03 21:25:19,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:25:19,985 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:25:19,986 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_42-trylock2_racefree_bound2.i [2023-08-03 21:25:19,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/133251539/ae68e79e854b45898089d92065d9231f/FLAG502adc9dd [2023-08-03 21:25:20,009 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/133251539/ae68e79e854b45898089d92065d9231f [2023-08-03 21:25:20,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:25:20,014 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:25:20,016 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:25:20,016 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:25:20,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:25:20,018 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,019 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f6c303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20, skipping insertion in model container [2023-08-03 21:25:20,019 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,055 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:25:20,262 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_42-trylock2_racefree_bound2.i[30176,30189] [2023-08-03 21:25:20,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:25:20,302 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:25:20,321 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:25:20,322 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:25:20,330 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_42-trylock2_racefree_bound2.i[30176,30189] [2023-08-03 21:25:20,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:25:20,359 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:25:20,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20 WrapperNode [2023-08-03 21:25:20,360 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:25:20,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:25:20,361 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:25:20,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:25:20,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,386 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2023-08-03 21:25:20,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:25:20,387 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:25:20,387 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:25:20,387 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:25:20,393 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,395 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,395 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,403 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,404 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,405 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,416 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:25:20,417 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:25:20,417 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:25:20,417 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:25:20,417 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (1/1) ... [2023-08-03 21:25:20,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:25:20,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:20,436 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 21:25:20,440 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 21:25:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:25:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:25:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:25:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:25:20,459 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 21:25:20,546 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:25:20,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:25:20,701 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:25:20,706 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:25:20,707 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-03 21:25:20,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:25:20 BoogieIcfgContainer [2023-08-03 21:25:20,708 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:25:20,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:25:20,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:25:20,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:25:20,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:25:20" (1/3) ... [2023-08-03 21:25:20,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264e6e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:25:20, skipping insertion in model container [2023-08-03 21:25:20,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:20" (2/3) ... [2023-08-03 21:25:20,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264e6e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:25:20, skipping insertion in model container [2023-08-03 21:25:20,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:25:20" (3/3) ... [2023-08-03 21:25:20,713 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_42-trylock2_racefree_bound2.i [2023-08-03 21:25:20,718 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:25:20,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:25:20,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-03 21:25:20,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:25:20,793 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:25:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 184 transitions, 376 flow [2023-08-03 21:25:20,908 INFO L124 PetriNetUnfolderBase]: 45/269 cut-off events. [2023-08-03 21:25:20,908 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:25:20,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1001 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-08-03 21:25:20,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 184 transitions, 376 flow [2023-08-03 21:25:20,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 179 transitions, 363 flow [2023-08-03 21:25:20,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:25:20,937 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 179 transitions, 363 flow [2023-08-03 21:25:20,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 179 transitions, 363 flow [2023-08-03 21:25:20,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 179 transitions, 363 flow [2023-08-03 21:25:20,978 INFO L124 PetriNetUnfolderBase]: 44/264 cut-off events. [2023-08-03 21:25:20,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:25:20,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 985 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-08-03 21:25:20,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 9646 [2023-08-03 21:25:23,601 INFO L134 LiptonReduction]: Checked pairs total: 21000 [2023-08-03 21:25:23,601 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-03 21:25:23,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:25:23,613 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;@29383d86, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:25:23,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:25:23,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:25:23,617 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2023-08-03 21:25:23,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:25:23,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:23,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:25:23,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:25:23,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:23,621 INFO L85 PathProgramCache]: Analyzing trace with hash -560655468, now seen corresponding path program 1 times [2023-08-03 21:25:23,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:23,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230997222] [2023-08-03 21:25:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:23,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:25:23,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:25:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:25:23,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:25:23,726 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:25:23,726 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:25:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:25:23,727 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:25:23,733 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:25:23,734 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:25:23,734 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:25:23,760 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:25:23,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:23,805 INFO L124 PetriNetUnfolderBase]: 76/433 cut-off events. [2023-08-03 21:25:23,805 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-03 21:25:23,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:23,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:23,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:25:23,811 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:23,811 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:23,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:23,840 INFO L124 PetriNetUnfolderBase]: 76/433 cut-off events. [2023-08-03 21:25:23,841 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-03 21:25:23,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 26076 [2023-08-03 21:25:26,486 INFO L134 LiptonReduction]: Checked pairs total: 81736 [2023-08-03 21:25:26,487 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-03 21:25:26,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:25:26,490 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;@29383d86, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:25:26,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:25:26,502 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:25:26,502 INFO L124 PetriNetUnfolderBase]: 29/120 cut-off events. [2023-08-03 21:25:26,502 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:25:26,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:26,503 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:25:26,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:25:26,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -778084677, now seen corresponding path program 1 times [2023-08-03 21:25:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:26,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94716180] [2023-08-03 21:25:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:26,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:26,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:26,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94716180] [2023-08-03 21:25:26,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94716180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:25:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117960495] [2023-08-03 21:25:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:26,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:26,663 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 21:25:26,679 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 21:25:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:26,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:25:26,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:25:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:26,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:25:26,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117960495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:26,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:25:26,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:25:26,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318597024] [2023-08-03 21:25:26,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:26,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:25:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:25:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:26,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 401 [2023-08-03 21:25:26,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 118 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 188.6) internal successors, (943), 5 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 21:25:26,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:26,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 401 [2023-08-03 21:25:26,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:27,915 INFO L124 PetriNetUnfolderBase]: 12006/19898 cut-off events. [2023-08-03 21:25:27,915 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-08-03 21:25:27,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38641 conditions, 19898 events. 12006/19898 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 149307 event pairs, 238 based on Foata normal form. 5104/23322 useless extension candidates. Maximal degree in co-relation 32076. Up to 18079 conditions per place. [2023-08-03 21:25:27,959 INFO L140 encePairwiseOnDemand]: 363/401 looper letters, 0 selfloop transitions, 0 changer transitions 130/130 dead transitions. [2023-08-03 21:25:27,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 494 flow [2023-08-03 21:25:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:25:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:25:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1116 transitions. [2023-08-03 21:25:27,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566084788029925 [2023-08-03 21:25:27,971 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1116 transitions. [2023-08-03 21:25:27,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1116 transitions. [2023-08-03 21:25:27,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:27,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1116 transitions. [2023-08-03 21:25:27,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 21:25:27,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states 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 21:25:27,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states 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 21:25:27,984 INFO L175 Difference]: Start difference. First operand has 86 places, 118 transitions, 254 flow. Second operand 5 states and 1116 transitions. [2023-08-03 21:25:27,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 494 flow [2023-08-03 21:25:27,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:27,989 INFO L231 Difference]: Finished difference. Result has 85 places, 0 transitions, 0 flow [2023-08-03 21:25:27,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=85, PETRI_TRANSITIONS=0} [2023-08-03 21:25:27,992 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -1 predicate places. [2023-08-03 21:25:27,993 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 0 transitions, 0 flow [2023-08-03 21:25:27,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.6) internal successors, (943), 5 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 21:25:27,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:25:28,003 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 21:25:28,197 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 21:25:28,200 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:25:28,201 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:25:28,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:28,232 INFO L124 PetriNetUnfolderBase]: 76/433 cut-off events. [2023-08-03 21:25:28,233 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:28,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-03 21:25:28,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:28,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:28,240 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:25:28,240 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:28,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:28,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-03 21:25:28,265 INFO L124 PetriNetUnfolderBase]: 76/433 cut-off events. [2023-08-03 21:25:28,265 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:28,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-03 21:25:28,274 INFO L119 LiptonReduction]: Number of co-enabled transitions 26076 [2023-08-03 21:25:30,788 INFO L134 LiptonReduction]: Checked pairs total: 72230 [2023-08-03 21:25:30,788 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-03 21:25:30,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:25:30,790 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;@29383d86, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:25:30,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 21:25:30,792 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:25:30,792 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-03 21:25:30,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:25:30,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:30,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 21:25:30,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:30,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash 40881202, now seen corresponding path program 1 times [2023-08-03 21:25:30,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:30,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984004865] [2023-08-03 21:25:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:30,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:30,833 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 21:25:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984004865] [2023-08-03 21:25:30,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984004865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:30,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:30,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:25:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42454898] [2023-08-03 21:25:30,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:30,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:25:30,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:25:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:25:30,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 404 [2023-08-03 21:25:30,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 21:25:30,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:30,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 404 [2023-08-03 21:25:30,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:31,913 INFO L124 PetriNetUnfolderBase]: 12484/21362 cut-off events. [2023-08-03 21:25:31,913 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-03 21:25:31,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40826 conditions, 21362 events. 12484/21362 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 158303 event pairs, 11756 based on Foata normal form. 4951/24153 useless extension candidates. Maximal degree in co-relation 33979. Up to 19353 conditions per place. [2023-08-03 21:25:31,982 INFO L140 encePairwiseOnDemand]: 367/404 looper letters, 68 selfloop transitions, 2 changer transitions 10/98 dead transitions. [2023-08-03 21:25:31,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 98 transitions, 370 flow [2023-08-03 21:25:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:25:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:25:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 689 transitions. [2023-08-03 21:25:31,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684818481848185 [2023-08-03 21:25:31,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 689 transitions. [2023-08-03 21:25:31,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 689 transitions. [2023-08-03 21:25:31,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:31,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 689 transitions. [2023-08-03 21:25:31,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 21:25:31,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:31,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:31,987 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 252 flow. Second operand 3 states and 689 transitions. [2023-08-03 21:25:31,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 98 transitions, 370 flow [2023-08-03 21:25:31,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 98 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:25:31,990 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 162 flow [2023-08-03 21:25:31,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2023-08-03 21:25:31,991 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 1 predicate places. [2023-08-03 21:25:31,991 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 162 flow [2023-08-03 21:25:31,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 21:25:31,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:31,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:31,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:25:31,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:31,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash 247965521, now seen corresponding path program 1 times [2023-08-03 21:25:31,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:31,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054556627] [2023-08-03 21:25:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:31,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:32,124 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 21:25:32,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:32,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054556627] [2023-08-03 21:25:32,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054556627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:25:32,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491150024] [2023-08-03 21:25:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:32,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:32,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:32,126 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 21:25:32,142 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 21:25:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:32,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:25:32,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:25:32,194 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 21:25:32,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:25:32,204 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 21:25:32,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491150024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:25:32,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:25:32,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:25:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531042309] [2023-08-03 21:25:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:25:32,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:25:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:25:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:25:32,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 404 [2023-08-03 21:25:32,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:32,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:32,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 404 [2023-08-03 21:25:32,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:33,076 INFO L124 PetriNetUnfolderBase]: 9646/16126 cut-off events. [2023-08-03 21:25:33,076 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-08-03 21:25:33,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31543 conditions, 16126 events. 9646/16126 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 115393 event pairs, 2238 based on Foata normal form. 16/15089 useless extension candidates. Maximal degree in co-relation 29421. Up to 13505 conditions per place. [2023-08-03 21:25:33,135 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 97 selfloop transitions, 3 changer transitions 1/119 dead transitions. [2023-08-03 21:25:33,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 458 flow [2023-08-03 21:25:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:25:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:25:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 850 transitions. [2023-08-03 21:25:33,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525990099009901 [2023-08-03 21:25:33,140 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 850 transitions. [2023-08-03 21:25:33,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 850 transitions. [2023-08-03 21:25:33,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:33,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 850 transitions. [2023-08-03 21:25:33,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 21:25:33,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:33,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:33,145 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 162 flow. Second operand 4 states and 850 transitions. [2023-08-03 21:25:33,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 458 flow [2023-08-03 21:25:33,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:33,148 INFO L231 Difference]: Finished difference. Result has 82 places, 72 transitions, 174 flow [2023-08-03 21:25:33,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=82, PETRI_TRANSITIONS=72} [2023-08-03 21:25:33,150 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2023-08-03 21:25:33,150 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 72 transitions, 174 flow [2023-08-03 21:25:33,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:33,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:33,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:33,157 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 21:25:33,354 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,SelfDestructingSolverStorable3 [2023-08-03 21:25:33,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:33,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 690205583, now seen corresponding path program 1 times [2023-08-03 21:25:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621550770] [2023-08-03 21:25:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:33,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621550770] [2023-08-03 21:25:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621550770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:33,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:33,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:25:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483444508] [2023-08-03 21:25:33,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:33,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:25:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:25:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:25:33,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 404 [2023-08-03 21:25:33,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 72 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 21:25:33,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:33,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 404 [2023-08-03 21:25:33,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:34,162 INFO L124 PetriNetUnfolderBase]: 9112/15457 cut-off events. [2023-08-03 21:25:34,162 INFO L125 PetriNetUnfolderBase]: For 2452/2452 co-relation queries the response was YES. [2023-08-03 21:25:34,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30845 conditions, 15457 events. 9112/15457 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 111161 event pairs, 3877 based on Foata normal form. 9/14342 useless extension candidates. Maximal degree in co-relation 26698. Up to 13646 conditions per place. [2023-08-03 21:25:34,225 INFO L140 encePairwiseOnDemand]: 398/404 looper letters, 76 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2023-08-03 21:25:34,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 97 transitions, 404 flow [2023-08-03 21:25:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:25:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:25:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-03 21:25:34,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288778877887789 [2023-08-03 21:25:34,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-03 21:25:34,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-03 21:25:34,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:34,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-03 21:25:34,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 21:25:34,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:34,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:34,231 INFO L175 Difference]: Start difference. First operand has 82 places, 72 transitions, 174 flow. Second operand 3 states and 641 transitions. [2023-08-03 21:25:34,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 97 transitions, 404 flow [2023-08-03 21:25:34,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 97 transitions, 392 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 21:25:34,233 INFO L231 Difference]: Finished difference. Result has 82 places, 74 transitions, 190 flow [2023-08-03 21:25:34,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2023-08-03 21:25:34,234 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2023-08-03 21:25:34,234 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 190 flow [2023-08-03 21:25:34,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 21:25:34,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:34,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:34,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:25:34,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:34,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash 387351733, now seen corresponding path program 1 times [2023-08-03 21:25:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:34,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187706721] [2023-08-03 21:25:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:34,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:25:34,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:34,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187706721] [2023-08-03 21:25:34,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187706721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:34,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:34,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:25:34,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35101198] [2023-08-03 21:25:34,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:34,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:25:34,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:25:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:25:34,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 404 [2023-08-03 21:25:34,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states 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 21:25:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 404 [2023-08-03 21:25:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:34,870 INFO L124 PetriNetUnfolderBase]: 3999/7706 cut-off events. [2023-08-03 21:25:34,871 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2023-08-03 21:25:34,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15648 conditions, 7706 events. 3999/7706 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 56958 event pairs, 1678 based on Foata normal form. 562/7980 useless extension candidates. Maximal degree in co-relation 11698. Up to 4584 conditions per place. [2023-08-03 21:25:34,895 INFO L140 encePairwiseOnDemand]: 393/404 looper letters, 93 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2023-08-03 21:25:34,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 122 transitions, 517 flow [2023-08-03 21:25:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:25:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:25:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 820 transitions. [2023-08-03 21:25:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074257425742574 [2023-08-03 21:25:34,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 820 transitions. [2023-08-03 21:25:34,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 820 transitions. [2023-08-03 21:25:34,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:34,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 820 transitions. [2023-08-03 21:25:34,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 21:25:34,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:34,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:34,902 INFO L175 Difference]: Start difference. First operand has 82 places, 74 transitions, 190 flow. Second operand 4 states and 820 transitions. [2023-08-03 21:25:34,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 122 transitions, 517 flow [2023-08-03 21:25:34,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 514 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:34,906 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 243 flow [2023-08-03 21:25:34,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-08-03 21:25:34,906 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 0 predicate places. [2023-08-03 21:25:34,906 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 243 flow [2023-08-03 21:25:34,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states 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 21:25:34,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:34,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:34,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:25:34,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:34,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1200379568, now seen corresponding path program 1 times [2023-08-03 21:25:34,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:34,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361052150] [2023-08-03 21:25:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:34,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:34,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:34,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361052150] [2023-08-03 21:25:34,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361052150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:34,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:34,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:25:34,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132072205] [2023-08-03 21:25:34,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:34,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:25:34,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:25:34,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:25:34,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 404 [2023-08-03 21:25:34,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:25:34,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:34,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 404 [2023-08-03 21:25:34,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:35,405 INFO L124 PetriNetUnfolderBase]: 4790/8833 cut-off events. [2023-08-03 21:25:35,405 INFO L125 PetriNetUnfolderBase]: For 3258/3258 co-relation queries the response was YES. [2023-08-03 21:25:35,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20193 conditions, 8833 events. 4790/8833 cut-off events. For 3258/3258 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 62334 event pairs, 1413 based on Foata normal form. 0/8536 useless extension candidates. Maximal degree in co-relation 15478. Up to 6725 conditions per place. [2023-08-03 21:25:35,429 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 104 selfloop transitions, 3 changer transitions 0/123 dead transitions. [2023-08-03 21:25:35,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 123 transitions, 594 flow [2023-08-03 21:25:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:25:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:25:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-03 21:25:35,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437293729372937 [2023-08-03 21:25:35,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-03 21:25:35,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-03 21:25:35,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:35,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-03 21:25:35,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 21:25:35,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:35,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:35,434 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 243 flow. Second operand 3 states and 659 transitions. [2023-08-03 21:25:35,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 123 transitions, 594 flow [2023-08-03 21:25:35,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 593 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:35,438 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 261 flow [2023-08-03 21:25:35,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2023-08-03 21:25:35,438 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 2 predicate places. [2023-08-03 21:25:35,438 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 261 flow [2023-08-03 21:25:35,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:25:35,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:35,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:35,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:25:35,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:35,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1330550426, now seen corresponding path program 1 times [2023-08-03 21:25:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:35,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565104062] [2023-08-03 21:25:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:35,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 21:25:35,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:35,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565104062] [2023-08-03 21:25:35,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565104062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:25:35,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045528754] [2023-08-03 21:25:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:35,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:35,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:35,528 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 21:25:35,533 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 21:25:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:35,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-03 21:25:35,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:25:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 21:25:35,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:25:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 21:25:35,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045528754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:25:35,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:25:35,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-03 21:25:35,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420864625] [2023-08-03 21:25:35,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:25:35,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:25:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:25:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:35,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 404 [2023-08-03 21:25:35,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 185.83333333333334) internal successors, (1115), 6 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states 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 21:25:35,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:35,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 404 [2023-08-03 21:25:35,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:36,208 INFO L124 PetriNetUnfolderBase]: 4044/7950 cut-off events. [2023-08-03 21:25:36,208 INFO L125 PetriNetUnfolderBase]: For 3102/3112 co-relation queries the response was YES. [2023-08-03 21:25:36,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18343 conditions, 7950 events. 4044/7950 cut-off events. For 3102/3112 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 58927 event pairs, 1620 based on Foata normal form. 50/7811 useless extension candidates. Maximal degree in co-relation 13166. Up to 6215 conditions per place. [2023-08-03 21:25:36,235 INFO L140 encePairwiseOnDemand]: 395/404 looper letters, 106 selfloop transitions, 7 changer transitions 0/132 dead transitions. [2023-08-03 21:25:36,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 666 flow [2023-08-03 21:25:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:25:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:25:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1199 transitions. [2023-08-03 21:25:36,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946369636963696 [2023-08-03 21:25:36,238 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1199 transitions. [2023-08-03 21:25:36,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1199 transitions. [2023-08-03 21:25:36,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:36,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1199 transitions. [2023-08-03 21:25:36,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.83333333333334) internal successors, (1199), 6 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states 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 21:25:36,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states 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 21:25:36,243 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states 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 21:25:36,243 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 261 flow. Second operand 6 states and 1199 transitions. [2023-08-03 21:25:36,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 666 flow [2023-08-03 21:25:36,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 132 transitions, 663 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:36,247 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 299 flow [2023-08-03 21:25:36,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-08-03 21:25:36,247 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 9 predicate places. [2023-08-03 21:25:36,247 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 299 flow [2023-08-03 21:25:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.83333333333334) internal successors, (1115), 6 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states 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 21:25:36,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:36,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:36,251 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 21:25:36,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:36,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:36,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1641854681, now seen corresponding path program 1 times [2023-08-03 21:25:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:36,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379628530] [2023-08-03 21:25:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:36,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:36,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379628530] [2023-08-03 21:25:36,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379628530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:36,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:36,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:25:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757077460] [2023-08-03 21:25:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:36,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:25:36,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:25:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:36,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 404 [2023-08-03 21:25:36,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 299 flow. Second operand has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 21:25:36,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:36,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 404 [2023-08-03 21:25:36,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:37,161 INFO L124 PetriNetUnfolderBase]: 4163/8122 cut-off events. [2023-08-03 21:25:37,161 INFO L125 PetriNetUnfolderBase]: For 4169/4184 co-relation queries the response was YES. [2023-08-03 21:25:37,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19390 conditions, 8122 events. 4163/8122 cut-off events. For 4169/4184 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 59763 event pairs, 2986 based on Foata normal form. 50/7962 useless extension candidates. Maximal degree in co-relation 10949. Up to 6516 conditions per place. [2023-08-03 21:25:37,185 INFO L140 encePairwiseOnDemand]: 395/404 looper letters, 107 selfloop transitions, 7 changer transitions 0/131 dead transitions. [2023-08-03 21:25:37,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 684 flow [2023-08-03 21:25:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:25:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:25:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1199 transitions. [2023-08-03 21:25:37,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946369636963696 [2023-08-03 21:25:37,189 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1199 transitions. [2023-08-03 21:25:37,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1199 transitions. [2023-08-03 21:25:37,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:37,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1199 transitions. [2023-08-03 21:25:37,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.83333333333334) internal successors, (1199), 6 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states 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 21:25:37,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states 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 21:25:37,194 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states 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 21:25:37,194 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 299 flow. Second operand 6 states and 1199 transitions. [2023-08-03 21:25:37,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 684 flow [2023-08-03 21:25:37,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 131 transitions, 681 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:37,198 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 337 flow [2023-08-03 21:25:37,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2023-08-03 21:25:37,199 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 16 predicate places. [2023-08-03 21:25:37,199 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 337 flow [2023-08-03 21:25:37,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 21:25:37,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:37,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:37,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 21:25:37,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:37,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash 12467058, now seen corresponding path program 1 times [2023-08-03 21:25:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:37,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235348470] [2023-08-03 21:25:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:37,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:37,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235348470] [2023-08-03 21:25:37,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235348470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:37,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:37,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:25:37,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681661412] [2023-08-03 21:25:37,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:37,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:25:37,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:25:37,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:25:37,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 404 [2023-08-03 21:25:37,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 21:25:37,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:37,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 404 [2023-08-03 21:25:37,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:38,062 INFO L124 PetriNetUnfolderBase]: 7094/13651 cut-off events. [2023-08-03 21:25:38,062 INFO L125 PetriNetUnfolderBase]: For 8265/8265 co-relation queries the response was YES. [2023-08-03 21:25:38,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34664 conditions, 13651 events. 7094/13651 cut-off events. For 8265/8265 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 104615 event pairs, 2708 based on Foata normal form. 1590/14954 useless extension candidates. Maximal degree in co-relation 26806. Up to 6951 conditions per place. [2023-08-03 21:25:38,118 INFO L140 encePairwiseOnDemand]: 375/404 looper letters, 95 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2023-08-03 21:25:38,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 143 transitions, 807 flow [2023-08-03 21:25:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:25:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:25:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-08-03 21:25:38,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49504950495049505 [2023-08-03 21:25:38,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-08-03 21:25:38,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-08-03 21:25:38,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:38,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-08-03 21:25:38,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states 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 21:25:38,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:38,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:38,122 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 337 flow. Second operand 3 states and 600 transitions. [2023-08-03 21:25:38,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 143 transitions, 807 flow [2023-08-03 21:25:38,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 800 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:38,134 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 558 flow [2023-08-03 21:25:38,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=558, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2023-08-03 21:25:38,135 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 17 predicate places. [2023-08-03 21:25:38,135 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 558 flow [2023-08-03 21:25:38,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 21:25:38,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:38,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 21:25:38,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:38,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 386141056, now seen corresponding path program 1 times [2023-08-03 21:25:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:38,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351795178] [2023-08-03 21:25:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:38,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:38,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351795178] [2023-08-03 21:25:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351795178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:38,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:38,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:25:38,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394634779] [2023-08-03 21:25:38,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:38,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:25:38,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:25:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:25:38,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 404 [2023-08-03 21:25:38,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 558 flow. Second operand has 5 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states 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 21:25:38,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:38,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 404 [2023-08-03 21:25:38,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:39,172 INFO L124 PetriNetUnfolderBase]: 5383/10668 cut-off events. [2023-08-03 21:25:39,173 INFO L125 PetriNetUnfolderBase]: For 9699/9739 co-relation queries the response was YES. [2023-08-03 21:25:39,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32920 conditions, 10668 events. 5383/10668 cut-off events. For 9699/9739 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 80329 event pairs, 1824 based on Foata normal form. 142/10512 useless extension candidates. Maximal degree in co-relation 27940. Up to 7916 conditions per place. [2023-08-03 21:25:39,227 INFO L140 encePairwiseOnDemand]: 396/404 looper letters, 98 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2023-08-03 21:25:39,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 134 transitions, 875 flow [2023-08-03 21:25:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:25:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:25:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 738 transitions. [2023-08-03 21:25:39,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566831683168317 [2023-08-03 21:25:39,229 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 738 transitions. [2023-08-03 21:25:39,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 738 transitions. [2023-08-03 21:25:39,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:39,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 738 transitions. [2023-08-03 21:25:39,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 21:25:39,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:39,233 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:39,233 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 558 flow. Second operand 4 states and 738 transitions. [2023-08-03 21:25:39,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 134 transitions, 875 flow [2023-08-03 21:25:39,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 836 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:39,246 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 541 flow [2023-08-03 21:25:39,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=541, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2023-08-03 21:25:39,247 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 19 predicate places. [2023-08-03 21:25:39,247 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 541 flow [2023-08-03 21:25:39,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states 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 21:25:39,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:39,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:39,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 21:25:39,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:39,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:39,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2032583470, now seen corresponding path program 1 times [2023-08-03 21:25:39,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:39,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385305433] [2023-08-03 21:25:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:39,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:39,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385305433] [2023-08-03 21:25:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385305433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:39,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:39,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:25:39,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071609659] [2023-08-03 21:25:39,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:39,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:25:39,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:25:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:25:39,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 404 [2023-08-03 21:25:39,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 541 flow. Second operand has 8 states, 8 states have (on average 182.25) internal successors, (1458), 8 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 21:25:39,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:39,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 404 [2023-08-03 21:25:39,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:40,244 INFO L124 PetriNetUnfolderBase]: 4896/9854 cut-off events. [2023-08-03 21:25:40,244 INFO L125 PetriNetUnfolderBase]: For 10231/10267 co-relation queries the response was YES. [2023-08-03 21:25:40,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28049 conditions, 9854 events. 4896/9854 cut-off events. For 10231/10267 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 73736 event pairs, 3123 based on Foata normal form. 447/10014 useless extension candidates. Maximal degree in co-relation 23343. Up to 7767 conditions per place. [2023-08-03 21:25:40,280 INFO L140 encePairwiseOnDemand]: 392/404 looper letters, 134 selfloop transitions, 17 changer transitions 4/172 dead transitions. [2023-08-03 21:25:40,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 172 transitions, 1102 flow [2023-08-03 21:25:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 21:25:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 21:25:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1540 transitions. [2023-08-03 21:25:40,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47648514851485146 [2023-08-03 21:25:40,284 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1540 transitions. [2023-08-03 21:25:40,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1540 transitions. [2023-08-03 21:25:40,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:40,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1540 transitions. [2023-08-03 21:25:40,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.5) internal successors, (1540), 8 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 21:25:40,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 404.0) internal successors, (3636), 9 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states 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 21:25:40,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 404.0) internal successors, (3636), 9 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states 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 21:25:40,290 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 541 flow. Second operand 8 states and 1540 transitions. [2023-08-03 21:25:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 172 transitions, 1102 flow [2023-08-03 21:25:40,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 172 transitions, 1058 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:25:40,296 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 497 flow [2023-08-03 21:25:40,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=497, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-08-03 21:25:40,297 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 20 predicate places. [2023-08-03 21:25:40,297 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 497 flow [2023-08-03 21:25:40,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 182.25) internal successors, (1458), 8 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 21:25:40,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:40,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:40,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 21:25:40,298 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:40,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash 238215417, now seen corresponding path program 1 times [2023-08-03 21:25:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:40,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777676798] [2023-08-03 21:25:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:40,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:40,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777676798] [2023-08-03 21:25:40,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777676798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:40,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:40,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:25:40,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701538531] [2023-08-03 21:25:40,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:40,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:25:40,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:25:40,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:25:40,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 404 [2023-08-03 21:25:40,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 497 flow. Second operand has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 21:25:40,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:40,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 404 [2023-08-03 21:25:40,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:41,211 INFO L124 PetriNetUnfolderBase]: 5342/11350 cut-off events. [2023-08-03 21:25:41,212 INFO L125 PetriNetUnfolderBase]: For 7603/7807 co-relation queries the response was YES. [2023-08-03 21:25:41,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30892 conditions, 11350 events. 5342/11350 cut-off events. For 7603/7807 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 92403 event pairs, 1621 based on Foata normal form. 338/11351 useless extension candidates. Maximal degree in co-relation 25678. Up to 4921 conditions per place. [2023-08-03 21:25:41,252 INFO L140 encePairwiseOnDemand]: 394/404 looper letters, 122 selfloop transitions, 21 changer transitions 1/165 dead transitions. [2023-08-03 21:25:41,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 165 transitions, 1088 flow [2023-08-03 21:25:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:25:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:25:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2023-08-03 21:25:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4771039603960396 [2023-08-03 21:25:41,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2023-08-03 21:25:41,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2023-08-03 21:25:41,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:41,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2023-08-03 21:25:41,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 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 21:25:41,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:41,257 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 21:25:41,257 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 497 flow. Second operand 4 states and 771 transitions. [2023-08-03 21:25:41,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 165 transitions, 1088 flow [2023-08-03 21:25:41,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 165 transitions, 1042 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-03 21:25:41,262 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 661 flow [2023-08-03 21:25:41,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=661, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2023-08-03 21:25:41,263 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 16 predicate places. [2023-08-03 21:25:41,263 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 661 flow [2023-08-03 21:25:41,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 21:25:41,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:41,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:41,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 21:25:41,264 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:41,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash 898103149, now seen corresponding path program 1 times [2023-08-03 21:25:41,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:41,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242624729] [2023-08-03 21:25:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:41,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242624729] [2023-08-03 21:25:41,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242624729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:41,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:41,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:25:41,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265594104] [2023-08-03 21:25:41,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:41,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:25:41,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:25:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:25:41,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 404 [2023-08-03 21:25:41,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 661 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 21:25:41,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:41,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 404 [2023-08-03 21:25:41,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:42,196 INFO L124 PetriNetUnfolderBase]: 6298/13243 cut-off events. [2023-08-03 21:25:42,196 INFO L125 PetriNetUnfolderBase]: For 14254/14572 co-relation queries the response was YES. [2023-08-03 21:25:42,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40251 conditions, 13243 events. 6298/13243 cut-off events. For 14254/14572 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 110669 event pairs, 1779 based on Foata normal form. 175/13274 useless extension candidates. Maximal degree in co-relation 33632. Up to 8793 conditions per place. [2023-08-03 21:25:42,253 INFO L140 encePairwiseOnDemand]: 384/404 looper letters, 122 selfloop transitions, 47 changer transitions 1/191 dead transitions. [2023-08-03 21:25:42,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 191 transitions, 1424 flow [2023-08-03 21:25:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:25:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:25:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-08-03 21:25:42,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49587458745874585 [2023-08-03 21:25:42,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-08-03 21:25:42,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-08-03 21:25:42,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:42,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-08-03 21:25:42,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 21:25:42,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:42,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 21:25:42,263 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 661 flow. Second operand 3 states and 601 transitions. [2023-08-03 21:25:42,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 191 transitions, 1424 flow [2023-08-03 21:25:42,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 191 transitions, 1423 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:42,270 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1244 flow [2023-08-03 21:25:42,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1244, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2023-08-03 21:25:42,271 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 19 predicate places. [2023-08-03 21:25:42,271 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1244 flow [2023-08-03 21:25:42,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 21:25:42,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:42,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:42,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 21:25:42,271 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:42,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash -419986579, now seen corresponding path program 2 times [2023-08-03 21:25:42,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:42,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466648396] [2023-08-03 21:25:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:42,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:42,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466648396] [2023-08-03 21:25:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466648396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:25:42,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200751596] [2023-08-03 21:25:42,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:25:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:42,434 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 21:25:42,436 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 21:25:42,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:25:42,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:25:42,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-03 21:25:42,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:25:42,643 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 21:25:42,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:25:42,674 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 14 treesize of output 16 [2023-08-03 21:25:42,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:25:42,698 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 14 treesize of output 16 [2023-08-03 21:25:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:25:42,707 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 14 treesize of output 16 [2023-08-03 21:25:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:42,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:25:42,734 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_413 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#mutex1~0.base| v_ArrVal_413) |c_~#mutex2~0.base|) |c_~#mutex2~0.offset|) 0))) is different from false [2023-08-03 21:25:42,795 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 21:25:42,795 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-03 21:25:42,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 119 [2023-08-03 21:25:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-03 21:25:42,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200751596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:25:42,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:25:42,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-03 21:25:42,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379048138] [2023-08-03 21:25:42,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:25:42,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 21:25:42,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 21:25:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=4, NotChecked=26, Total=240 [2023-08-03 21:25:42,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 404 [2023-08-03 21:25:42,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1244 flow. Second operand has 16 states, 16 states have (on average 141.25) internal successors, (2260), 16 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states 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 21:25:42,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:42,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 404 [2023-08-03 21:25:42,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:43,641 INFO L124 PetriNetUnfolderBase]: 1206/3178 cut-off events. [2023-08-03 21:25:43,641 INFO L125 PetriNetUnfolderBase]: For 8579/8585 co-relation queries the response was YES. [2023-08-03 21:25:43,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12080 conditions, 3178 events. 1206/3178 cut-off events. For 8579/8585 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 22349 event pairs, 172 based on Foata normal form. 292/3470 useless extension candidates. Maximal degree in co-relation 7811. Up to 1419 conditions per place. [2023-08-03 21:25:43,656 INFO L140 encePairwiseOnDemand]: 374/404 looper letters, 100 selfloop transitions, 85 changer transitions 32/230 dead transitions. [2023-08-03 21:25:43,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 230 transitions, 1994 flow [2023-08-03 21:25:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 21:25:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 21:25:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1377 transitions. [2023-08-03 21:25:43,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787128712871287 [2023-08-03 21:25:43,659 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1377 transitions. [2023-08-03 21:25:43,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1377 transitions. [2023-08-03 21:25:43,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:43,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1377 transitions. [2023-08-03 21:25:43,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.0) internal successors, (1377), 9 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 21:25:43,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 404.0) internal successors, (4040), 10 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states 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 21:25:43,665 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 404.0) internal successors, (4040), 10 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states 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 21:25:43,665 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1244 flow. Second operand 9 states and 1377 transitions. [2023-08-03 21:25:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 230 transitions, 1994 flow [2023-08-03 21:25:43,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 230 transitions, 1894 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:43,675 INFO L231 Difference]: Finished difference. Result has 111 places, 158 transitions, 1269 flow [2023-08-03 21:25:43,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1269, PETRI_PLACES=111, PETRI_TRANSITIONS=158} [2023-08-03 21:25:43,676 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 26 predicate places. [2023-08-03 21:25:43,676 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 158 transitions, 1269 flow [2023-08-03 21:25:43,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 141.25) internal successors, (2260), 16 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states 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 21:25:43,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:43,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:43,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 21:25:43,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 21:25:43,881 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:43,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash 257462013, now seen corresponding path program 1 times [2023-08-03 21:25:43,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:43,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005800962] [2023-08-03 21:25:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:43,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005800962] [2023-08-03 21:25:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005800962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:43,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:43,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:25:43,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186861387] [2023-08-03 21:25:43,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:43,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:25:43,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:25:43,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:44,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 404 [2023-08-03 21:25:44,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 158 transitions, 1269 flow. Second operand has 6 states, 6 states have (on average 187.83333333333334) internal successors, (1127), 6 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:44,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:44,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 404 [2023-08-03 21:25:44,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:44,358 INFO L124 PetriNetUnfolderBase]: 1153/2912 cut-off events. [2023-08-03 21:25:44,358 INFO L125 PetriNetUnfolderBase]: For 7169/7196 co-relation queries the response was YES. [2023-08-03 21:25:44,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11816 conditions, 2912 events. 1153/2912 cut-off events. For 7169/7196 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 19699 event pairs, 345 based on Foata normal form. 7/2897 useless extension candidates. Maximal degree in co-relation 7736. Up to 1148 conditions per place. [2023-08-03 21:25:44,368 INFO L140 encePairwiseOnDemand]: 396/404 looper letters, 260 selfloop transitions, 11 changer transitions 3/294 dead transitions. [2023-08-03 21:25:44,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 294 transitions, 2944 flow [2023-08-03 21:25:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:25:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:25:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1402 transitions. [2023-08-03 21:25:44,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957567185289958 [2023-08-03 21:25:44,373 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1402 transitions. [2023-08-03 21:25:44,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1402 transitions. [2023-08-03 21:25:44,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:44,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1402 transitions. [2023-08-03 21:25:44,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.28571428571428) internal successors, (1402), 7 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states 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 21:25:44,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states 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 21:25:44,377 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states 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 21:25:44,377 INFO L175 Difference]: Start difference. First operand has 111 places, 158 transitions, 1269 flow. Second operand 7 states and 1402 transitions. [2023-08-03 21:25:44,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 294 transitions, 2944 flow [2023-08-03 21:25:44,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 294 transitions, 2858 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:44,388 INFO L231 Difference]: Finished difference. Result has 114 places, 165 transitions, 1315 flow [2023-08-03 21:25:44,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1315, PETRI_PLACES=114, PETRI_TRANSITIONS=165} [2023-08-03 21:25:44,388 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 29 predicate places. [2023-08-03 21:25:44,388 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 165 transitions, 1315 flow [2023-08-03 21:25:44,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 187.83333333333334) internal successors, (1127), 6 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:44,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:44,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:44,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 21:25:44,389 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:44,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1724232078, now seen corresponding path program 1 times [2023-08-03 21:25:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:44,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017066072] [2023-08-03 21:25:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017066072] [2023-08-03 21:25:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017066072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:25:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741388609] [2023-08-03 21:25:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:44,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:25:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:25:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:44,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 404 [2023-08-03 21:25:44,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 165 transitions, 1315 flow. Second operand has 6 states, 6 states have (on average 187.83333333333334) internal successors, (1127), 6 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:44,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:44,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 404 [2023-08-03 21:25:44,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:44,839 INFO L124 PetriNetUnfolderBase]: 1153/2908 cut-off events. [2023-08-03 21:25:44,839 INFO L125 PetriNetUnfolderBase]: For 7522/7549 co-relation queries the response was YES. [2023-08-03 21:25:44,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12093 conditions, 2908 events. 1153/2908 cut-off events. For 7522/7549 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 19652 event pairs, 322 based on Foata normal form. 7/2893 useless extension candidates. Maximal degree in co-relation 8079. Up to 1166 conditions per place. [2023-08-03 21:25:44,851 INFO L140 encePairwiseOnDemand]: 396/404 looper letters, 260 selfloop transitions, 11 changer transitions 3/294 dead transitions. [2023-08-03 21:25:44,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 294 transitions, 2917 flow [2023-08-03 21:25:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:25:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:25:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1396 transitions. [2023-08-03 21:25:44,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363507779349364 [2023-08-03 21:25:44,854 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1396 transitions. [2023-08-03 21:25:44,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1396 transitions. [2023-08-03 21:25:44,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:44,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1396 transitions. [2023-08-03 21:25:44,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.42857142857142) internal successors, (1396), 7 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 21:25:44,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states 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 21:25:44,858 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states 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 21:25:44,858 INFO L175 Difference]: Start difference. First operand has 114 places, 165 transitions, 1315 flow. Second operand 7 states and 1396 transitions. [2023-08-03 21:25:44,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 294 transitions, 2917 flow [2023-08-03 21:25:44,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 294 transitions, 2914 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:44,873 INFO L231 Difference]: Finished difference. Result has 123 places, 172 transitions, 1405 flow [2023-08-03 21:25:44,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1405, PETRI_PLACES=123, PETRI_TRANSITIONS=172} [2023-08-03 21:25:44,874 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 38 predicate places. [2023-08-03 21:25:44,874 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 172 transitions, 1405 flow [2023-08-03 21:25:44,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 187.83333333333334) internal successors, (1127), 6 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:44,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:44,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:44,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 21:25:44,875 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:25:44,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:44,875 INFO L85 PathProgramCache]: Analyzing trace with hash 131143787, now seen corresponding path program 1 times [2023-08-03 21:25:44,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:44,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624202107] [2023-08-03 21:25:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:44,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:45,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:45,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624202107] [2023-08-03 21:25:45,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624202107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:45,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:45,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:25:45,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370988556] [2023-08-03 21:25:45,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:45,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:25:45,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:25:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:25:45,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 404 [2023-08-03 21:25:45,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 172 transitions, 1405 flow. Second operand has 8 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states 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 21:25:45,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:45,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 404 [2023-08-03 21:25:45,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:45,587 INFO L124 PetriNetUnfolderBase]: 1153/2902 cut-off events. [2023-08-03 21:25:45,587 INFO L125 PetriNetUnfolderBase]: For 8255/8285 co-relation queries the response was YES. [2023-08-03 21:25:45,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12606 conditions, 2902 events. 1153/2902 cut-off events. For 8255/8285 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 19602 event pairs, 274 based on Foata normal form. 4/2883 useless extension candidates. Maximal degree in co-relation 8951. Up to 1344 conditions per place. [2023-08-03 21:25:45,597 INFO L140 encePairwiseOnDemand]: 392/404 looper letters, 0 selfloop transitions, 0 changer transitions 307/307 dead transitions. [2023-08-03 21:25:45,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 307 transitions, 3093 flow [2023-08-03 21:25:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-03 21:25:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-03 21:25:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1912 transitions. [2023-08-03 21:25:45,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47326732673267324 [2023-08-03 21:25:45,601 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1912 transitions. [2023-08-03 21:25:45,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1912 transitions. [2023-08-03 21:25:45,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:45,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1912 transitions. [2023-08-03 21:25:45,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 191.2) internal successors, (1912), 10 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states 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 21:25:45,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 404.0) internal successors, (4444), 11 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states 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 21:25:45,607 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 404.0) internal successors, (4444), 11 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states 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 21:25:45,607 INFO L175 Difference]: Start difference. First operand has 123 places, 172 transitions, 1405 flow. Second operand 10 states and 1912 transitions. [2023-08-03 21:25:45,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 307 transitions, 3093 flow [2023-08-03 21:25:45,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 307 transitions, 3087 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:45,626 INFO L231 Difference]: Finished difference. Result has 129 places, 0 transitions, 0 flow [2023-08-03 21:25:45,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=129, PETRI_TRANSITIONS=0} [2023-08-03 21:25:45,627 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 44 predicate places. [2023-08-03 21:25:45,628 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 0 transitions, 0 flow [2023-08-03 21:25:45,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states 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 21:25:45,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 21:25:45,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 21:25:45,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 21:25:45,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 21:25:45,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 21:25:45,629 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:45,629 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (2/2) [2023-08-03 21:25:45,629 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:25:45,629 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:25:45,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:25:45 BasicIcfg [2023-08-03 21:25:45,633 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:25:45,633 INFO L158 Benchmark]: Toolchain (without parser) took 25618.94ms. Allocated memory was 597.7MB in the beginning and 2.0GB in the end (delta: 1.4GB). Free memory was 558.1MB in the beginning and 730.1MB in the end (delta: -172.0MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. [2023-08-03 21:25:45,633 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 423.6MB. Free memory is still 376.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:25:45,633 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.23ms. Allocated memory is still 597.7MB. Free memory was 557.8MB in the beginning and 537.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 21:25:45,633 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.25ms. Allocated memory is still 597.7MB. Free memory was 537.3MB in the beginning and 534.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:25:45,634 INFO L158 Benchmark]: Boogie Preprocessor took 28.89ms. Allocated memory is still 597.7MB. Free memory was 534.8MB in the beginning and 533.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:25:45,634 INFO L158 Benchmark]: RCFGBuilder took 291.67ms. Allocated memory is still 597.7MB. Free memory was 533.1MB in the beginning and 514.9MB in the end (delta: 18.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 21:25:45,634 INFO L158 Benchmark]: TraceAbstraction took 24923.03ms. Allocated memory was 597.7MB in the beginning and 2.0GB in the end (delta: 1.4GB). Free memory was 514.2MB in the beginning and 730.1MB in the end (delta: -215.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. [2023-08-03 21:25:45,635 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 423.6MB. Free memory is still 376.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 344.23ms. Allocated memory is still 597.7MB. Free memory was 557.8MB in the beginning and 537.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.25ms. Allocated memory is still 597.7MB. Free memory was 537.3MB in the beginning and 534.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.89ms. Allocated memory is still 597.7MB. Free memory was 534.8MB in the beginning and 533.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 291.67ms. Allocated memory is still 597.7MB. Free memory was 533.1MB in the beginning and 514.9MB in the end (delta: 18.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 24923.03ms. Allocated memory was 597.7MB in the beginning and 2.0GB in the end (delta: 1.4GB). Free memory was 514.2MB in the beginning and 730.1MB in the end (delta: -215.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 154 PlacesBefore, 54 PlacesAfterwards, 179 TransitionsBefore, 75 TransitionsAfterwards, 9646 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 82 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 4 ChoiceCompositions, 137 TotalNumberOfCompositions, 21000 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8997, independent: 8617, independent conditional: 0, independent unconditional: 8617, dependent: 380, dependent conditional: 0, dependent unconditional: 380, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4746, independent: 4673, independent conditional: 0, independent unconditional: 4673, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8997, independent: 3944, independent conditional: 0, independent unconditional: 3944, dependent: 307, dependent conditional: 0, dependent unconditional: 307, unknown: 4746, unknown conditional: 0, unknown unconditional: 4746] , Statistics on independence cache: Total cache size (in pairs): 308, Positive cache size: 265, Positive conditional cache size: 0, Positive unconditional cache size: 265, Negative cache size: 43, Negative conditional cache size: 0, Negative unconditional cache size: 43, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 202 PlacesBefore, 86 PlacesAfterwards, 239 TransitionsBefore, 118 TransitionsAfterwards, 26076 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 29 ConcurrentYvCompositions, 5 ChoiceCompositions, 162 TotalNumberOfCompositions, 81736 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 27053, independent: 26271, independent conditional: 0, independent unconditional: 26271, dependent: 782, dependent conditional: 0, dependent unconditional: 782, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 11852, independent: 11745, independent conditional: 0, independent unconditional: 11745, dependent: 107, dependent conditional: 0, dependent unconditional: 107, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 27053, independent: 14526, independent conditional: 0, independent unconditional: 14526, dependent: 675, dependent conditional: 0, dependent unconditional: 675, unknown: 11852, unknown conditional: 0, unknown unconditional: 11852] , Statistics on independence cache: Total cache size (in pairs): 948, Positive cache size: 878, Positive conditional cache size: 0, Positive unconditional cache size: 878, Negative cache size: 70, Negative conditional cache size: 0, Negative unconditional cache size: 70, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 202 PlacesBefore, 85 PlacesAfterwards, 239 TransitionsBefore, 117 TransitionsAfterwards, 26076 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 98 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 29 ConcurrentYvCompositions, 5 ChoiceCompositions, 165 TotalNumberOfCompositions, 72230 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 21887, independent: 21227, independent conditional: 0, independent unconditional: 21227, dependent: 660, dependent conditional: 0, dependent unconditional: 660, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 11812, independent: 11698, independent conditional: 0, independent unconditional: 11698, dependent: 114, dependent conditional: 0, dependent unconditional: 114, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 21887, independent: 9529, independent conditional: 0, independent unconditional: 9529, dependent: 546, dependent conditional: 0, dependent unconditional: 546, unknown: 11812, unknown conditional: 0, unknown unconditional: 11812] , Statistics on independence cache: Total cache size (in pairs): 678, Positive cache size: 606, Positive conditional cache size: 0, Positive unconditional cache size: 606, Negative cache size: 72, Negative conditional cache size: 0, Negative unconditional cache size: 72, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 198 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.9s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 240 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.4s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 141 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 135 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 181 IncrementalHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 181 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=254occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 240 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.4s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 11.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1921 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1310 mSDsluCounter, 436 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 176 IncrementalHoareTripleChecker+Unchecked, 302 mSDsCounter, 503 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5553 IncrementalHoareTripleChecker+Invalid, 6232 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 503 mSolverCounterUnsat, 134 mSDtfsCounter, 5553 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 240 GetRequests, 140 SyntacticMatches, 15 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1405occurred in iteration=15, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 581 ConstructedInterpolants, 6 QuantifiedInterpolants, 2732 SizeOfPredicates, 6 NumberOfNonLiveVariables, 590 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 22 InterpolantComputations, 13 PerfectInterpolantSequences, 100/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 21:25:45,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...