/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:38:16,084 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:38:16,124 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:38:16,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:38:16,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:38:16,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:38:16,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:38:16,145 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:38:16,145 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:38:16,145 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:38:16,146 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:38:16,146 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:38:16,147 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:38:16,147 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:38:16,147 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:38:16,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:38:16,148 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:38:16,148 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:38:16,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:38:16,149 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:38:16,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:38:16,150 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:38:16,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:38:16,150 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:38:16,150 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:38:16,151 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:38:16,151 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:38:16,151 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:38:16,152 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:38:16,152 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:38:16,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:38:16,153 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:38:16,153 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:38:16,154 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:38:16,154 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:38:16,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:38:16,154 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:38:16,155 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:38:16,155 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:38:16,155 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:38:16,156 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:38:16,156 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:38:16,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:38:16,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:38:16,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:38:16,387 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:38:16,388 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:38:16,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i [2023-08-04 04:38:17,625 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:38:17,902 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:38:17,902 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i [2023-08-04 04:38:17,923 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393b7c9e9/97f98e702eb44e4f9cc69b6d743b086f/FLAG5a76fc273 [2023-08-04 04:38:17,935 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393b7c9e9/97f98e702eb44e4f9cc69b6d743b086f [2023-08-04 04:38:17,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:38:17,938 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:38:17,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:38:17,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:38:17,942 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:38:17,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:38:17" (1/1) ... [2023-08-04 04:38:17,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17aefd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:17, skipping insertion in model container [2023-08-04 04:38:17,944 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:38:17" (1/1) ... [2023-08-04 04:38:18,006 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:38:18,471 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i[76068,76081] [2023-08-04 04:38:18,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:38:18,491 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:38:18,514 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-04 04:38:18,516 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-04 04:38:18,520 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [729] [2023-08-04 04:38:18,550 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i[76068,76081] [2023-08-04 04:38:18,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:38:18,663 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:38:18,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18 WrapperNode [2023-08-04 04:38:18,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:38:18,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:38:18,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:38:18,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:38:18,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,702 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,728 INFO L138 Inliner]: procedures = 480, calls = 28, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 109 [2023-08-04 04:38:18,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:38:18,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:38:18,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:38:18,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:38:18,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,771 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:38:18,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:38:18,774 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:38:18,774 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:38:18,775 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (1/1) ... [2023-08-04 04:38:18,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:38:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:38:18,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 04:38:18,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 04:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-04 04:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:38:18,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 04:38:18,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 04:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:38:18,826 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 04:38:19,017 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:38:19,019 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:38:19,285 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:38:19,293 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:38:19,294 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 04:38:19,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:38:19 BoogieIcfgContainer [2023-08-04 04:38:19,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:38:19,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:38:19,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:38:19,303 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:38:19,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:38:17" (1/3) ... [2023-08-04 04:38:19,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9b2dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:38:19, skipping insertion in model container [2023-08-04 04:38:19,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:38:18" (2/3) ... [2023-08-04 04:38:19,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9b2dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:38:19, skipping insertion in model container [2023-08-04 04:38:19,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:38:19" (3/3) ... [2023-08-04 04:38:19,306 INFO L112 eAbstractionObserver]: Analyzing ICFG ldv-races_race-1_1-join_bound2.i [2023-08-04 04:38:19,311 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:38:19,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:38:19,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-04 04:38:19,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:38:19,356 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-04 04:38:19,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:19,433 INFO L124 PetriNetUnfolderBase]: 13/151 cut-off events. [2023-08-04 04:38:19,433 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:38:19,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 151 events. 13/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 286 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-08-04 04:38:19,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:19,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:19,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:38:19,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:19,453 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:19,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:19,473 INFO L124 PetriNetUnfolderBase]: 13/151 cut-off events. [2023-08-04 04:38:19,474 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:38:19,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 151 events. 13/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 286 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-08-04 04:38:19,476 INFO L119 LiptonReduction]: Number of co-enabled transitions 1260 [2023-08-04 04:38:22,013 INFO L134 LiptonReduction]: Checked pairs total: 1665 [2023-08-04 04:38:22,013 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-04 04:38:22,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:38:22,027 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;@4985e4eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:38:22,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-04 04:38:22,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:38:22,028 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-04 04:38:22,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:38:22,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:22,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-04 04:38:22,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:38:22,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:22,032 INFO L85 PathProgramCache]: Analyzing trace with hash 460, now seen corresponding path program 1 times [2023-08-04 04:38:22,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:22,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685930882] [2023-08-04 04:38:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:22,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:22,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:22,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685930882] [2023-08-04 04:38:22,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685930882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:22,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:22,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-04 04:38:22,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977295857] [2023-08-04 04:38:22,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 04:38:22,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 04:38:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 04:38:22,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 248 [2023-08-04 04:38:22,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 21 transitions, 50 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:22,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 248 [2023-08-04 04:38:22,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:22,297 INFO L124 PetriNetUnfolderBase]: 31/78 cut-off events. [2023-08-04 04:38:22,297 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:38:22,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 78 events. 31/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 242 event pairs, 24 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 126. Up to 77 conditions per place. [2023-08-04 04:38:22,299 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 17 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2023-08-04 04:38:22,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 18 transitions, 78 flow [2023-08-04 04:38:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-04 04:38:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-04 04:38:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2023-08-04 04:38:22,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45564516129032256 [2023-08-04 04:38:22,314 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2023-08-04 04:38:22,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2023-08-04 04:38:22,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:22,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2023-08-04 04:38:22,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,327 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,329 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 50 flow. Second operand 2 states and 226 transitions. [2023-08-04 04:38:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 18 transitions, 78 flow [2023-08-04 04:38:22,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:38:22,331 INFO L231 Difference]: Finished difference. Result has 19 places, 18 transitions, 44 flow [2023-08-04 04:38:22,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=19, PETRI_TRANSITIONS=18} [2023-08-04 04:38:22,336 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-04 04:38:22,336 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 18 transitions, 44 flow [2023-08-04 04:38:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:22,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 04:38:22,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:38:22,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:38:22,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash 14142842, now seen corresponding path program 1 times [2023-08-04 04:38:22,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:22,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386933981] [2023-08-04 04:38:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:22,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:22,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386933981] [2023-08-04 04:38:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386933981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:38:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357268620] [2023-08-04 04:38:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:22,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:38:22,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 248 [2023-08-04 04:38:22,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 18 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:22,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 248 [2023-08-04 04:38:22,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:22,595 INFO L124 PetriNetUnfolderBase]: 31/79 cut-off events. [2023-08-04 04:38:22,595 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:38:22,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 79 events. 31/79 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 241 event pairs, 24 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 161. Up to 77 conditions per place. [2023-08-04 04:38:22,597 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 16 selfloop transitions, 0 changer transitions 2/19 dead transitions. [2023-08-04 04:38:22,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 19 transitions, 82 flow [2023-08-04 04:38:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-04 04:38:22,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-04 04:38:22,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-04 04:38:22,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-04 04:38:22,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:22,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-04 04:38:22,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,607 INFO L175 Difference]: Start difference. First operand has 19 places, 18 transitions, 44 flow. Second operand 3 states and 310 transitions. [2023-08-04 04:38:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 19 transitions, 82 flow [2023-08-04 04:38:22,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:38:22,609 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 46 flow [2023-08-04 04:38:22,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-04 04:38:22,621 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-08-04 04:38:22,621 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 46 flow [2023-08-04 04:38:22,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:22,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:38:22,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 04:38:22,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:38:22,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 435119463, now seen corresponding path program 1 times [2023-08-04 04:38:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:22,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412029659] [2023-08-04 04:38:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:22,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:22,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412029659] [2023-08-04 04:38:22,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412029659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:22,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:22,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:38:22,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933329325] [2023-08-04 04:38:22,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:22,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:22,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:38:22,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-04 04:38:22,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:22,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-04 04:38:22,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:22,773 INFO L124 PetriNetUnfolderBase]: 28/76 cut-off events. [2023-08-04 04:38:22,774 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:38:22,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 76 events. 28/76 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 211 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 163. Up to 67 conditions per place. [2023-08-04 04:38:22,775 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-04 04:38:22,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 94 flow [2023-08-04 04:38:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-08-04 04:38:22,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2023-08-04 04:38:22,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-08-04 04:38:22,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-08-04 04:38:22,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:22,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-08-04 04:38:22,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,782 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 3 states and 318 transitions. [2023-08-04 04:38:22,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 94 flow [2023-08-04 04:38:22,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 90 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 04:38:22,784 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 50 flow [2023-08-04 04:38:22,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-04 04:38:22,785 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-04 04:38:22,785 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 50 flow [2023-08-04 04:38:22,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:22,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:38:22,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:38:22,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:38:22,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash 435305470, now seen corresponding path program 1 times [2023-08-04 04:38:22,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:22,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760465738] [2023-08-04 04:38:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:22,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:22,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760465738] [2023-08-04 04:38:22,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760465738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:22,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:22,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:38:22,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847416036] [2023-08-04 04:38:22,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:22,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:22,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:38:22,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 248 [2023-08-04 04:38:22,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:22,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 248 [2023-08-04 04:38:22,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:22,980 INFO L124 PetriNetUnfolderBase]: 20/65 cut-off events. [2023-08-04 04:38:22,980 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 04:38:22,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 65 events. 20/65 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 2 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 143. Up to 38 conditions per place. [2023-08-04 04:38:22,981 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 19 selfloop transitions, 3 changer transitions 4/26 dead transitions. [2023-08-04 04:38:22,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 26 transitions, 123 flow [2023-08-04 04:38:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-04 04:38:22,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-04 04:38:22,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-04 04:38:22,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-04 04:38:22,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:22,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-04 04:38:22,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,987 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 50 flow. Second operand 3 states and 321 transitions. [2023-08-04 04:38:22,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 26 transitions, 123 flow [2023-08-04 04:38:22,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 26 transitions, 117 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:38:22,990 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 64 flow [2023-08-04 04:38:22,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-04 04:38:22,991 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-04 04:38:22,991 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 64 flow [2023-08-04 04:38:22,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:22,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:22,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:38:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:38:22,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:38:22,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1693967136, now seen corresponding path program 1 times [2023-08-04 04:38:22,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:22,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309445097] [2023-08-04 04:38:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:22,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309445097] [2023-08-04 04:38:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309445097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:38:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89850459] [2023-08-04 04:38:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:23,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:38:23,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:38:23,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 04:38:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:23,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:38:23,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:38:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:23,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:38:23,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89850459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:23,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:38:23,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:38:23,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723817224] [2023-08-04 04:38:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:23,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:23,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:23,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:38:23,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 248 [2023-08-04 04:38:23,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:23,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 248 [2023-08-04 04:38:23,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:23,342 INFO L124 PetriNetUnfolderBase]: 10/36 cut-off events. [2023-08-04 04:38:23,342 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 04:38:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 36 events. 10/36 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 6 based on Foata normal form. 3/39 useless extension candidates. Maximal degree in co-relation 102. Up to 26 conditions per place. [2023-08-04 04:38:23,342 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 13 selfloop transitions, 2 changer transitions 2/17 dead transitions. [2023-08-04 04:38:23,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 96 flow [2023-08-04 04:38:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-04 04:38:23,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2023-08-04 04:38:23,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-04 04:38:23,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-04 04:38:23,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:23,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-04 04:38:23,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,346 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 64 flow. Second operand 3 states and 315 transitions. [2023-08-04 04:38:23,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 96 flow [2023-08-04 04:38:23,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 79 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-04 04:38:23,347 INFO L231 Difference]: Finished difference. Result has 22 places, 13 transitions, 44 flow [2023-08-04 04:38:23,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=13} [2023-08-04 04:38:23,347 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-08-04 04:38:23,348 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 13 transitions, 44 flow [2023-08-04 04:38:23,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:23,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:38:23,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 04:38:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:23,559 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:38:23,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1970269524, now seen corresponding path program 1 times [2023-08-04 04:38:23,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:23,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825756381] [2023-08-04 04:38:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:23,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:23,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825756381] [2023-08-04 04:38:23,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825756381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:38:23,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312325241] [2023-08-04 04:38:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:23,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:23,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:38:23,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:38:23,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 04:38:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:23,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:38:23,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:38:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:23,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:38:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:23,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312325241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:38:23,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:38:23,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:38:23,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77353240] [2023-08-04 04:38:23,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:38:23,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:38:23,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:23,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:38:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:38:23,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 248 [2023-08-04 04:38:23,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 13 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:23,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 248 [2023-08-04 04:38:23,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:23,836 INFO L124 PetriNetUnfolderBase]: 4/15 cut-off events. [2023-08-04 04:38:23,836 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:38:23,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 15 events. 4/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 37. Up to 10 conditions per place. [2023-08-04 04:38:23,837 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 04:38:23,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 9 transitions, 42 flow [2023-08-04 04:38:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:38:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:38:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2023-08-04 04:38:23,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40524193548387094 [2023-08-04 04:38:23,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2023-08-04 04:38:23,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2023-08-04 04:38:23,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:23,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2023-08-04 04:38:23,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,842 INFO L175 Difference]: Start difference. First operand has 22 places, 13 transitions, 44 flow. Second operand 4 states and 402 transitions. [2023-08-04 04:38:23,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 9 transitions, 42 flow [2023-08-04 04:38:23,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:38:23,843 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 04:38:23,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=15, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-04 04:38:23,845 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -4 predicate places. [2023-08-04 04:38:23,845 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 04:38:23,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:23,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-04 04:38:23,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-04 04:38:23,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-04 04:38:23,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-04 04:38:23,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-04 04:38:23,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 04:38:24,054 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,SelfDestructingSolverStorable5 [2023-08-04 04:38:24,055 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 04:38:24,057 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 04:38:24,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:24,068 INFO L124 PetriNetUnfolderBase]: 13/151 cut-off events. [2023-08-04 04:38:24,068 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:38:24,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 151 events. 13/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 286 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-08-04 04:38:24,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 115 transitions, 238 flow [2023-08-04 04:38:24,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 95 transitions, 195 flow [2023-08-04 04:38:24,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:38:24,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 95 transitions, 195 flow [2023-08-04 04:38:24,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 95 transitions, 195 flow [2023-08-04 04:38:24,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 195 flow [2023-08-04 04:38:24,076 INFO L124 PetriNetUnfolderBase]: 10/131 cut-off events. [2023-08-04 04:38:24,076 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:38:24,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 10/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 04:38:24,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 1260 [2023-08-04 04:38:25,999 INFO L134 LiptonReduction]: Checked pairs total: 1404 [2023-08-04 04:38:26,000 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-04 04:38:26,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:38:26,001 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;@4985e4eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:38:26,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:38:26,003 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:38:26,003 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-08-04 04:38:26,003 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:38:26,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:26,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:38:26,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:38:26,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash -401212756, now seen corresponding path program 1 times [2023-08-04 04:38:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:26,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466265719] [2023-08-04 04:38:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:26,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:38:26,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:38:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:38:26,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:38:26,051 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:38:26,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:38:26,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 04:38:26,052 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:38:26,052 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 04:38:26,052 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:38:26,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:38:26,062 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-04 04:38:26,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:26,076 INFO L124 PetriNetUnfolderBase]: 22/243 cut-off events. [2023-08-04 04:38:26,076 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:38:26,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 22/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 587 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-04 04:38:26,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:26,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:26,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:38:26,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:26,079 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:26,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:26,090 INFO L124 PetriNetUnfolderBase]: 22/243 cut-off events. [2023-08-04 04:38:26,091 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:38:26,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 22/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 587 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-04 04:38:26,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 3420 [2023-08-04 04:38:28,225 INFO L134 LiptonReduction]: Checked pairs total: 7827 [2023-08-04 04:38:28,225 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-04 04:38:28,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:38:28,226 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;@4985e4eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:38:28,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 04:38:28,227 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:38:28,227 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-04 04:38:28,227 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:38:28,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:28,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-04 04:38:28,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:28,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 858, now seen corresponding path program 1 times [2023-08-04 04:38:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196128051] [2023-08-04 04:38:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:28,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196128051] [2023-08-04 04:38:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196128051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:28,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:28,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-04 04:38:28,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3272019] [2023-08-04 04:38:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:28,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 04:38:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 04:38:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 04:38:28,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 274 [2023-08-04 04:38:28,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 90 flow. Second operand has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:28,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 274 [2023-08-04 04:38:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:28,329 INFO L124 PetriNetUnfolderBase]: 748/1268 cut-off events. [2023-08-04 04:38:28,330 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-04 04:38:28,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2563 conditions, 1268 events. 748/1268 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5859 event pairs, 688 based on Foata normal form. 64/921 useless extension candidates. Maximal degree in co-relation 649. Up to 1242 conditions per place. [2023-08-04 04:38:28,335 INFO L140 encePairwiseOnDemand]: 269/274 looper letters, 27 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2023-08-04 04:38:28,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 132 flow [2023-08-04 04:38:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-04 04:38:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-04 04:38:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 264 transitions. [2023-08-04 04:38:28,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48175182481751827 [2023-08-04 04:38:28,336 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 264 transitions. [2023-08-04 04:38:28,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 264 transitions. [2023-08-04 04:38:28,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:28,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 264 transitions. [2023-08-04 04:38:28,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,338 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,338 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 90 flow. Second operand 2 states and 264 transitions. [2023-08-04 04:38:28,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 132 flow [2023-08-04 04:38:28,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:38:28,339 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 78 flow [2023-08-04 04:38:28,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-04 04:38:28,340 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-04 04:38:28,340 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 78 flow [2023-08-04 04:38:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:28,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 04:38:28,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 04:38:28,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:28,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash 26426492, now seen corresponding path program 1 times [2023-08-04 04:38:28,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:28,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404436596] [2023-08-04 04:38:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:28,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404436596] [2023-08-04 04:38:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404436596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:28,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:38:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732537698] [2023-08-04 04:38:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:38:28,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 274 [2023-08-04 04:38:28,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:28,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 274 [2023-08-04 04:38:28,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:28,530 INFO L124 PetriNetUnfolderBase]: 748/1269 cut-off events. [2023-08-04 04:38:28,530 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-04 04:38:28,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2566 conditions, 1269 events. 748/1269 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5835 event pairs, 688 based on Foata normal form. 0/858 useless extension candidates. Maximal degree in co-relation 2561. Up to 1242 conditions per place. [2023-08-04 04:38:28,536 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 26 selfloop transitions, 0 changer transitions 2/31 dead transitions. [2023-08-04 04:38:28,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 136 flow [2023-08-04 04:38:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-04 04:38:28,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367396593673966 [2023-08-04 04:38:28,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-04 04:38:28,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-04 04:38:28,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:28,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-04 04:38:28,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,541 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 78 flow. Second operand 3 states and 359 transitions. [2023-08-04 04:38:28,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 136 flow [2023-08-04 04:38:28,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:38:28,543 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 80 flow [2023-08-04 04:38:28,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-04 04:38:28,543 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2023-08-04 04:38:28,543 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 80 flow [2023-08-04 04:38:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:28,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:38:28,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:38:28,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:28,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash 815828410, now seen corresponding path program 1 times [2023-08-04 04:38:28,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:28,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460349066] [2023-08-04 04:38:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:28,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:28,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:28,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460349066] [2023-08-04 04:38:28,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460349066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:28,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:28,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:38:28,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251185424] [2023-08-04 04:38:28,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:28,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:28,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:28,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:28,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:38:28,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-04 04:38:28,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:28,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-04 04:38:28,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:28,693 INFO L124 PetriNetUnfolderBase]: 745/1266 cut-off events. [2023-08-04 04:38:28,693 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-08-04 04:38:28,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 1266 events. 745/1266 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5784 event pairs, 310 based on Foata normal form. 0/858 useless extension candidates. Maximal degree in co-relation 2653. Up to 1229 conditions per place. [2023-08-04 04:38:28,699 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 32 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-04 04:38:28,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 164 flow [2023-08-04 04:38:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 04:38:28,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451338199513382 [2023-08-04 04:38:28,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 04:38:28,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 04:38:28,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:28,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 04:38:28,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,703 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 80 flow. Second operand 3 states and 371 transitions. [2023-08-04 04:38:28,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 164 flow [2023-08-04 04:38:28,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 160 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 04:38:28,704 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 88 flow [2023-08-04 04:38:28,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-04 04:38:28,705 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-04 04:38:28,705 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 88 flow [2023-08-04 04:38:28,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:28,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 04:38:28,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 04:38:28,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:28,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash -473776817, now seen corresponding path program 1 times [2023-08-04 04:38:28,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:28,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948243248] [2023-08-04 04:38:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:28,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:28,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:28,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948243248] [2023-08-04 04:38:28,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948243248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:28,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:28,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:38:28,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802158178] [2023-08-04 04:38:28,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:28,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:28,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:28,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:28,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:38:28,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 274 [2023-08-04 04:38:28,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:28,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 274 [2023-08-04 04:38:28,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:28,872 INFO L124 PetriNetUnfolderBase]: 576/1077 cut-off events. [2023-08-04 04:38:28,872 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-04 04:38:28,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 1077 events. 576/1077 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5418 event pairs, 183 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2237. Up to 684 conditions per place. [2023-08-04 04:38:28,876 INFO L140 encePairwiseOnDemand]: 265/274 looper letters, 38 selfloop transitions, 5 changer transitions 3/48 dead transitions. [2023-08-04 04:38:28,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 226 flow [2023-08-04 04:38:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-04 04:38:28,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586374695863747 [2023-08-04 04:38:28,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-04 04:38:28,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-04 04:38:28,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:28,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-04 04:38:28,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,896 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 88 flow. Second operand 3 states and 377 transitions. [2023-08-04 04:38:28,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 226 flow [2023-08-04 04:38:28,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:38:28,898 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 126 flow [2023-08-04 04:38:28,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-04 04:38:28,898 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 04:38:28,898 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 126 flow [2023-08-04 04:38:28,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:28,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:28,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:38:28,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 04:38:28,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:28,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1667030754, now seen corresponding path program 1 times [2023-08-04 04:38:28,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:28,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470758220] [2023-08-04 04:38:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:28,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470758220] [2023-08-04 04:38:28,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470758220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:38:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896167714] [2023-08-04 04:38:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:38:28,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:38:29,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 04:38:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:29,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:38:29,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:38:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:29,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:38:29,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896167714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:29,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:38:29,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:38:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112507887] [2023-08-04 04:38:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:29,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:29,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:29,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:29,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:38:29,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-04 04:38:29,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:29,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-04 04:38:29,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:29,181 INFO L124 PetriNetUnfolderBase]: 296/589 cut-off events. [2023-08-04 04:38:29,181 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2023-08-04 04:38:29,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 589 events. 296/589 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2524 event pairs, 178 based on Foata normal form. 30/615 useless extension candidates. Maximal degree in co-relation 1501. Up to 406 conditions per place. [2023-08-04 04:38:29,184 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 42 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 04:38:29,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 260 flow [2023-08-04 04:38:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 04:38:29,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45498783454987834 [2023-08-04 04:38:29,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 04:38:29,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 04:38:29,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:29,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 04:38:29,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,188 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 126 flow. Second operand 3 states and 374 transitions. [2023-08-04 04:38:29,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 260 flow [2023-08-04 04:38:29,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 243 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:38:29,191 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 122 flow [2023-08-04 04:38:29,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-04 04:38:29,192 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-04 04:38:29,192 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 122 flow [2023-08-04 04:38:29,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:29,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:38:29,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 04:38:29,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:29,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:29,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash -601885738, now seen corresponding path program 1 times [2023-08-04 04:38:29,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:29,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628642542] [2023-08-04 04:38:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:29,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628642542] [2023-08-04 04:38:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628642542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:38:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044580745] [2023-08-04 04:38:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:29,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:38:29,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:38:29,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 04:38:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:29,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:38:29,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:38:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:29,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:38:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:38:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044580745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:38:29,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:38:29,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:38:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348422074] [2023-08-04 04:38:29,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:38:29,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:38:29,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:38:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:38:29,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-04 04:38:29,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 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) [2023-08-04 04:38:29,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:29,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-04 04:38:29,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:29,706 INFO L124 PetriNetUnfolderBase]: 283/560 cut-off events. [2023-08-04 04:38:29,706 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-08-04 04:38:29,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1440 conditions, 560 events. 283/560 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2226 event pairs, 33 based on Foata normal form. 5/555 useless extension candidates. Maximal degree in co-relation 1430. Up to 409 conditions per place. [2023-08-04 04:38:29,709 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 43 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 04:38:29,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 264 flow [2023-08-04 04:38:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:38:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:38:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2023-08-04 04:38:29,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425182481751825 [2023-08-04 04:38:29,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2023-08-04 04:38:29,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2023-08-04 04:38:29,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:29,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2023-08-04 04:38:29,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:29,713 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 122 flow. Second operand 4 states and 485 transitions. [2023-08-04 04:38:29,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 264 flow [2023-08-04 04:38:29,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:38:29,715 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 134 flow [2023-08-04 04:38:29,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-04 04:38:29,716 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-08-04 04:38:29,716 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 134 flow [2023-08-04 04:38:29,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 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) [2023-08-04 04:38:29,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:29,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:38:29,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 04:38:29,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:29,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:29,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash 521741941, now seen corresponding path program 1 times [2023-08-04 04:38:29,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:29,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158672532] [2023-08-04 04:38:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:29,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:38:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158672532] [2023-08-04 04:38:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158672532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:38:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27472763] [2023-08-04 04:38:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:38:30,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:38:30,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 04:38:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:30,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:38:30,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:38:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:38:30,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:38:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:38:30,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27472763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:38:30,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:38:30,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 04:38:30,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838524457] [2023-08-04 04:38:30,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:38:30,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:38:30,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:30,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:38:30,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:38:30,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-04 04:38:30,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:30,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-04 04:38:30,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:30,205 INFO L124 PetriNetUnfolderBase]: 213/407 cut-off events. [2023-08-04 04:38:30,205 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2023-08-04 04:38:30,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 407 events. 213/407 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1439 event pairs, 99 based on Foata normal form. 10/416 useless extension candidates. Maximal degree in co-relation 1123. Up to 205 conditions per place. [2023-08-04 04:38:30,207 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 43 selfloop transitions, 3 changer transitions 2/50 dead transitions. [2023-08-04 04:38:30,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 279 flow [2023-08-04 04:38:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:38:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:38:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2023-08-04 04:38:30,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44525547445255476 [2023-08-04 04:38:30,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2023-08-04 04:38:30,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2023-08-04 04:38:30,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:30,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2023-08-04 04:38:30,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,211 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 134 flow. Second operand 4 states and 488 transitions. [2023-08-04 04:38:30,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 279 flow [2023-08-04 04:38:30,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 268 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 04:38:30,213 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 116 flow [2023-08-04 04:38:30,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2023-08-04 04:38:30,214 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-04 04:38:30,214 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 116 flow [2023-08-04 04:38:30,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:30,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:38:30,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 04:38:30,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 04:38:30,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:38:30,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash 477775677, now seen corresponding path program 1 times [2023-08-04 04:38:30,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175895885] [2023-08-04 04:38:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 04:38:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175895885] [2023-08-04 04:38:30,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175895885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:30,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:38:30,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:38:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098718145] [2023-08-04 04:38:30,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:30,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:38:30,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:38:30,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:38:30,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 274 [2023-08-04 04:38:30,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:30,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 274 [2023-08-04 04:38:30,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:30,608 INFO L124 PetriNetUnfolderBase]: 213/404 cut-off events. [2023-08-04 04:38:30,608 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2023-08-04 04:38:30,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 404 events. 213/404 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1428 event pairs, 195 based on Foata normal form. 1/404 useless extension candidates. Maximal degree in co-relation 1157. Up to 388 conditions per place. [2023-08-04 04:38:30,609 INFO L140 encePairwiseOnDemand]: 272/274 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-04 04:38:30,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 26 transitions, 162 flow [2023-08-04 04:38:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:38:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:38:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-04 04:38:30,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42700729927007297 [2023-08-04 04:38:30,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-04 04:38:30,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-04 04:38:30,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:30,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-04 04:38:30,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,613 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 116 flow. Second operand 3 states and 351 transitions. [2023-08-04 04:38:30,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 26 transitions, 162 flow [2023-08-04 04:38:30,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 26 transitions, 156 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 04:38:30,615 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-04 04:38:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-04 04:38:30,616 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 04:38:30,616 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-04 04:38:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:30,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-04 04:38:30,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-04 04:38:30,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-04 04:38:30,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-04 04:38:30,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-04 04:38:30,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-04 04:38:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 04:38:30,617 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:38:30,617 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 04:38:30,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:30,630 INFO L124 PetriNetUnfolderBase]: 22/243 cut-off events. [2023-08-04 04:38:30,630 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:38:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 22/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 587 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-04 04:38:30,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 132 transitions, 282 flow [2023-08-04 04:38:30,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 119 transitions, 256 flow [2023-08-04 04:38:30,631 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:38:30,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 119 transitions, 256 flow [2023-08-04 04:38:30,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 119 transitions, 256 flow [2023-08-04 04:38:30,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 119 transitions, 256 flow [2023-08-04 04:38:30,642 INFO L124 PetriNetUnfolderBase]: 20/230 cut-off events. [2023-08-04 04:38:30,642 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:38:30,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 230 events. 20/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 543 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-08-04 04:38:30,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 3420 [2023-08-04 04:38:32,598 INFO L134 LiptonReduction]: Checked pairs total: 7023 [2023-08-04 04:38:32,598 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 04:38:32,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:38:32,600 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;@4985e4eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:38:32,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:38:32,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:38:32,602 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2023-08-04 04:38:32,602 INFO L125 PetriNetUnfolderBase]: For 3/4 co-relation queries the response was YES. [2023-08-04 04:38:32,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:38:32,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 04:38:32,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:38:32,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:38:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1474328738, now seen corresponding path program 1 times [2023-08-04 04:38:32,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:38:32,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015343554] [2023-08-04 04:38:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:38:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:32,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:38:32,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015343554] [2023-08-04 04:38:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015343554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:38:32,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108942641] [2023-08-04 04:38:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:38:32,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:38:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:38:32,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:38:32,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 04:38:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:38:32,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 04:38:32,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:38:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:38:32,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:38:32,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108942641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:38:32,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:38:32,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 04:38:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681498150] [2023-08-04 04:38:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:38:32,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:38:32,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:38:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:38:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:38:32,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 247 [2023-08-04 04:38:32,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:32,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:38:32,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 247 [2023-08-04 04:38:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:38:32,875 INFO L124 PetriNetUnfolderBase]: 549/972 cut-off events. [2023-08-04 04:38:32,875 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 04:38:32,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1964 conditions, 972 events. 549/972 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4951 event pairs, 0 based on Foata normal form. 51/745 useless extension candidates. Maximal degree in co-relation 407. Up to 837 conditions per place. [2023-08-04 04:38:32,877 INFO L140 encePairwiseOnDemand]: 240/247 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2023-08-04 04:38:32,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 198 flow [2023-08-04 04:38:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:38:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:38:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 609 transitions. [2023-08-04 04:38:32,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931174089068826 [2023-08-04 04:38:32,878 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 609 transitions. [2023-08-04 04:38:32,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 609 transitions. [2023-08-04 04:38:32,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:38:32,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 609 transitions. [2023-08-04 04:38:32,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:32,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:32,881 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:32,881 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 80 flow. Second operand 5 states and 609 transitions. [2023-08-04 04:38:32,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 198 flow [2023-08-04 04:38:32,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:38:32,882 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-04 04:38:32,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-04 04:38:32,883 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-04 04:38:32,883 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-04 04:38:32,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:38:32,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:38:32,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 04:38:33,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 04:38:33,088 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:38:33,091 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 04:38:33,091 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 04:38:33,091 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 04:38:33,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 04:38:33 BasicIcfg [2023-08-04 04:38:33,096 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 04:38:33,097 INFO L158 Benchmark]: Toolchain (without parser) took 15158.64ms. Allocated memory was 375.4MB in the beginning and 713.0MB in the end (delta: 337.6MB). Free memory was 327.4MB in the beginning and 344.7MB in the end (delta: -17.2MB). Peak memory consumption was 324.6MB. Max. memory is 16.0GB. [2023-08-04 04:38:33,097 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 375.4MB. Free memory is still 331.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 04:38:33,097 INFO L158 Benchmark]: CACSL2BoogieTranslator took 724.76ms. Allocated memory was 375.4MB in the beginning and 549.5MB in the end (delta: 174.1MB). Free memory was 327.4MB in the beginning and 498.8MB in the end (delta: -171.4MB). Peak memory consumption was 46.7MB. Max. memory is 16.0GB. [2023-08-04 04:38:33,098 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.32ms. Allocated memory is still 549.5MB. Free memory was 498.8MB in the beginning and 494.6MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:38:33,098 INFO L158 Benchmark]: Boogie Preprocessor took 45.30ms. Allocated memory is still 549.5MB. Free memory was 494.6MB in the beginning and 492.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:38:33,098 INFO L158 Benchmark]: RCFGBuilder took 522.13ms. Allocated memory is still 549.5MB. Free memory was 492.5MB in the beginning and 471.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 04:38:33,098 INFO L158 Benchmark]: TraceAbstraction took 13795.66ms. Allocated memory was 549.5MB in the beginning and 713.0MB in the end (delta: 163.6MB). Free memory was 470.5MB in the beginning and 344.7MB in the end (delta: 125.8MB). Peak memory consumption was 290.5MB. Max. memory is 16.0GB. [2023-08-04 04:38:33,099 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 375.4MB. Free memory is still 331.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 724.76ms. Allocated memory was 375.4MB in the beginning and 549.5MB in the end (delta: 174.1MB). Free memory was 327.4MB in the beginning and 498.8MB in the end (delta: -171.4MB). Peak memory consumption was 46.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 63.32ms. Allocated memory is still 549.5MB. Free memory was 498.8MB in the beginning and 494.6MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 45.30ms. Allocated memory is still 549.5MB. Free memory was 494.6MB in the beginning and 492.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 522.13ms. Allocated memory is still 549.5MB. Free memory was 492.5MB in the beginning and 471.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 13795.66ms. Allocated memory was 549.5MB in the beginning and 713.0MB in the end (delta: 163.6MB). Free memory was 470.5MB in the beginning and 344.7MB in the end (delta: 125.8MB). Peak memory consumption was 290.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 729]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [729] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 109 PlacesBefore, 20 PlacesAfterwards, 115 TransitionsBefore, 21 TransitionsAfterwards, 1260 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 133 TotalNumberOfCompositions, 1665 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1332, independent: 1270, independent conditional: 0, independent unconditional: 1270, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 754, independent: 740, independent conditional: 0, independent unconditional: 740, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1332, independent: 530, independent conditional: 0, independent unconditional: 530, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 754, unknown conditional: 0, unknown unconditional: 754] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 92 PlacesBefore, 15 PlacesAfterwards, 95 TransitionsBefore, 13 TransitionsAfterwards, 1260 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 14 ConcurrentYvCompositions, 5 ChoiceCompositions, 108 TotalNumberOfCompositions, 1404 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1191, independent: 1151, independent conditional: 0, independent unconditional: 1151, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 737, independent: 720, independent conditional: 0, independent unconditional: 720, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1191, independent: 431, independent conditional: 0, independent unconditional: 431, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 737, unknown conditional: 0, unknown unconditional: 737] , Statistics on independence cache: Total cache size (in pairs): 12, Positive cache size: 7, Positive conditional cache size: 0, Positive unconditional cache size: 7, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 126 PlacesBefore, 34 PlacesAfterwards, 132 TransitionsBefore, 36 TransitionsAfterwards, 3420 CoEnabledTransitionPairs, 7 FixpointIterations, 60 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 20 ConcurrentYvCompositions, 4 ChoiceCompositions, 142 TotalNumberOfCompositions, 7827 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4758, independent: 4579, independent conditional: 0, independent unconditional: 4579, dependent: 179, dependent conditional: 0, dependent unconditional: 179, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2018, independent: 1986, independent conditional: 0, independent unconditional: 1986, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4758, independent: 2593, independent conditional: 0, independent unconditional: 2593, dependent: 147, dependent conditional: 0, dependent unconditional: 147, unknown: 2018, unknown conditional: 0, unknown unconditional: 2018] , Statistics on independence cache: Total cache size (in pairs): 175, Positive cache size: 158, Positive conditional cache size: 0, Positive unconditional cache size: 158, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 115 PlacesBefore, 31 PlacesAfterwards, 119 TransitionsBefore, 31 TransitionsAfterwards, 3420 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 13 ConcurrentYvCompositions, 4 ChoiceCompositions, 115 TotalNumberOfCompositions, 7023 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4653, independent: 4502, independent conditional: 0, independent unconditional: 4502, dependent: 151, dependent conditional: 0, dependent unconditional: 151, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1959, independent: 1927, independent conditional: 0, independent unconditional: 1927, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4653, independent: 2575, independent conditional: 0, independent unconditional: 2575, dependent: 119, dependent conditional: 0, dependent unconditional: 119, unknown: 1959, unknown conditional: 0, unknown unconditional: 1959] , Statistics on independence cache: Total cache size (in pairs): 160, Positive cache size: 143, Positive conditional cache size: 0, Positive unconditional cache size: 143, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 1693]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 1693]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 1693]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 1693]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 122 locations, 6 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: 4.7s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 99 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 220 IncrementalHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 16 mSDtfsCounter, 220 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=4, InterpolantAutomatonStates: 18, 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, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 114 SizeOfPredicates, 0 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 137 locations, 7 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: 4.6s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 190 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 113 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 525 IncrementalHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 22 mSDtfsCounter, 525 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=6, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 263 SizeOfPredicates, 0 NumberOfNonLiveVariables, 492 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 33/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 122 locations, 6 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: 2.0s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 137 locations, 7 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: 2.5s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 85 IncrementalHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 85 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=80occurred 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, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 136 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 - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 04:38:33,141 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...