/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_41-trylock_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:25:13,662 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:25:13,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:25:13,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:25:13,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:25:13,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:25:13,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:25:13,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:25:13,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:25:13,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:25:13,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:25:13,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:25:13,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:25:13,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:25:13,781 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:25:13,781 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:25:13,782 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:25:13,782 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:25:13,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:25:13,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:25:13,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:25:13,783 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:25:13,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:25:13,783 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:25:13,784 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:25:13,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:25:13,785 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:25:13,785 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:25:13,785 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:25:13,786 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:25:13,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:25:13,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:25:13,787 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:25:13,787 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:25:13,787 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:25:13,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:25:13,787 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:25:13,788 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:25:13,788 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:25:13,788 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:25:13,788 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:25:13,788 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:25:13,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:25:14,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:25:14,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:25:14,007 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:25:14,007 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:25:14,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_41-trylock_racefree_bound2.i [2023-08-03 21:25:15,109 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:25:15,344 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:25:15,344 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_41-trylock_racefree_bound2.i [2023-08-03 21:25:15,356 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf9304a5/19cb111828784acba121b13b67d5851c/FLAGb2be05748 [2023-08-03 21:25:15,367 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf9304a5/19cb111828784acba121b13b67d5851c [2023-08-03 21:25:15,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:25:15,371 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:25:15,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:25:15,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:25:15,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:25:15,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe22d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15, skipping insertion in model container [2023-08-03 21:25:15,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,422 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:25:15,691 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_41-trylock_racefree_bound2.i[30176,30189] [2023-08-03 21:25:15,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:25:15,724 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:25:15,753 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:25:15,754 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:25:15,763 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_41-trylock_racefree_bound2.i[30176,30189] [2023-08-03 21:25:15,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:25:15,818 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:25:15,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15 WrapperNode [2023-08-03 21:25:15,819 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:25:15,820 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:25:15,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:25:15,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:25:15,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,857 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,881 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-08-03 21:25:15,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:25:15,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:25:15,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:25:15,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:25:15,891 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,902 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,903 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,911 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,914 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,916 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:25:15,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:25:15,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:25:15,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:25:15,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (1/1) ... [2023-08-03 21:25:15,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:25:15,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:15,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 21:25:16,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 21:25:16,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:25:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:25:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:25:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:25:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:25:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:25:16,032 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:25:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:25:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-03 21:25:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:25:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:25:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:25:16,036 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:25:16,149 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:25:16,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:25:16,341 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:25:16,346 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:25:16,347 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-03 21:25:16,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:25:16 BoogieIcfgContainer [2023-08-03 21:25:16,348 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:25:16,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:25:16,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:25:16,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:25:16,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:25:15" (1/3) ... [2023-08-03 21:25:16,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c06a3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:25:16, skipping insertion in model container [2023-08-03 21:25:16,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:15" (2/3) ... [2023-08-03 21:25:16,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c06a3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:25:16, skipping insertion in model container [2023-08-03 21:25:16,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:25:16" (3/3) ... [2023-08-03 21:25:16,355 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_41-trylock_racefree_bound2.i [2023-08-03 21:25:16,363 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:25:16,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:25:16,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:25:16,372 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:25:16,454 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:25:16,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-08-03 21:25:16,531 INFO L124 PetriNetUnfolderBase]: 21/140 cut-off events. [2023-08-03 21:25:16,532 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:25:16,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-03 21:25:16,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-08-03 21:25:16,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-08-03 21:25:16,546 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:25:16,557 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-03 21:25:16,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-03 21:25:16,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-08-03 21:25:16,586 INFO L124 PetriNetUnfolderBase]: 20/135 cut-off events. [2023-08-03 21:25:16,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:25:16,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-03 21:25:16,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-08-03 21:25:18,786 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-08-03 21:25:18,786 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-03 21:25:18,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:25:18,804 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;@1c26c879, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:25:18,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:25:18,809 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:25:18,809 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-08-03 21:25:18,810 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:25:18,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:18,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:25:18,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:25:18,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -981753351, now seen corresponding path program 1 times [2023-08-03 21:25:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:18,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726787397] [2023-08-03 21:25:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:25:18,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:25:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:25:18,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:25:18,960 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:25:18,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:25:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:25:18,963 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:25:18,965 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:25:18,965 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:25:18,966 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:25:18,990 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:25:18,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:19,035 INFO L124 PetriNetUnfolderBase]: 37/231 cut-off events. [2023-08-03 21:25:19,035 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:19,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-03 21:25:19,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:19,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:19,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:25:19,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:19,040 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:19,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:19,080 INFO L124 PetriNetUnfolderBase]: 37/231 cut-off events. [2023-08-03 21:25:19,081 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:19,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-03 21:25:19,092 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-08-03 21:25:21,093 INFO L134 LiptonReduction]: Checked pairs total: 14688 [2023-08-03 21:25:21,093 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-03 21:25:21,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:25:21,096 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;@1c26c879, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:25:21,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:25:21,106 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:25:21,107 INFO L124 PetriNetUnfolderBase]: 13/59 cut-off events. [2023-08-03 21:25:21,107 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 21:25:21,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:21,107 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:25:21,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:25:21,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1871727149, now seen corresponding path program 1 times [2023-08-03 21:25:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:21,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303265045] [2023-08-03 21:25:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:21,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:21,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303265045] [2023-08-03 21:25:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303265045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:25:21,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599091181] [2023-08-03 21:25:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:21,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:21,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:21,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:25:21,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:25:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:21,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:25:21,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:25:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:21,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:25:21,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599091181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:21,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:25:21,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:25:21,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935866839] [2023-08-03 21:25:21,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:25:21,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:21,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:25:21,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:21,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 225 [2023-08-03 21:25:21,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:21,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:21,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 225 [2023-08-03 21:25:21,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:21,750 INFO L124 PetriNetUnfolderBase]: 1540/2539 cut-off events. [2023-08-03 21:25:21,751 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-03 21:25:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 2539 events. 1540/2539 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 14719 event pairs, 0 based on Foata normal form. 408/2685 useless extension candidates. Maximal degree in co-relation 586. Up to 2309 conditions per place. [2023-08-03 21:25:21,757 INFO L140 encePairwiseOnDemand]: 207/225 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2023-08-03 21:25:21,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 268 flow [2023-08-03 21:25:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:25:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:25:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 617 transitions. [2023-08-03 21:25:21,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484444444444444 [2023-08-03 21:25:21,772 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 617 transitions. [2023-08-03 21:25:21,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 617 transitions. [2023-08-03 21:25:21,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:21,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 617 transitions. [2023-08-03 21:25:21,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:21,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:21,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:21,787 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 5 states and 617 transitions. [2023-08-03 21:25:21,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 268 flow [2023-08-03 21:25:21,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:21,791 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-03 21:25:21,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-03 21:25:21,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-03 21:25:21,796 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-03 21:25:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:21,797 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:25:21,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:25:22,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:22,002 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:25:22,003 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:25:22,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:22,021 INFO L124 PetriNetUnfolderBase]: 37/231 cut-off events. [2023-08-03 21:25:22,021 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:22,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-03 21:25:22,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:22,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:22,024 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:25:22,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:22,024 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:22,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-03 21:25:22,040 INFO L124 PetriNetUnfolderBase]: 37/231 cut-off events. [2023-08-03 21:25:22,040 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:25:22,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-03 21:25:22,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-08-03 21:25:23,850 INFO L134 LiptonReduction]: Checked pairs total: 16435 [2023-08-03 21:25:23,851 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-03 21:25:23,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:25:23,853 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;@1c26c879, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:25:23,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:25:23,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:25:23,856 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-03 21:25:23,856 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:25:23,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:23,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:25:23,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:25:23,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:23,857 INFO L85 PathProgramCache]: Analyzing trace with hash 713598234, now seen corresponding path program 1 times [2023-08-03 21:25:23,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488155701] [2023-08-03 21:25:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488155701] [2023-08-03 21:25:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488155701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:23,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:23,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:25:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252219998] [2023-08-03 21:25:23,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:25:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:25:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:25:23,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 224 [2023-08-03 21:25:23,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:23,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:23,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 224 [2023-08-03 21:25:23,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:24,187 INFO L124 PetriNetUnfolderBase]: 1665/2829 cut-off events. [2023-08-03 21:25:24,188 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-03 21:25:24,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2829 events. 1665/2829 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15925 event pairs, 1331 based on Foata normal form. 442/2906 useless extension candidates. Maximal degree in co-relation 2459. Up to 2666 conditions per place. [2023-08-03 21:25:24,198 INFO L140 encePairwiseOnDemand]: 206/224 looper letters, 32 selfloop transitions, 2 changer transitions 10/52 dead transitions. [2023-08-03 21:25:24,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 206 flow [2023-08-03 21:25:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:25:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:25:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-03 21:25:24,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2023-08-03 21:25:24,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-03 21:25:24,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-03 21:25:24,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:24,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-03 21:25:24,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,205 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 136 flow. Second operand 3 states and 382 transitions. [2023-08-03 21:25:24,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 206 flow [2023-08-03 21:25:24,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:25:24,209 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 86 flow [2023-08-03 21:25:24,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-03 21:25:24,210 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-03 21:25:24,210 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 86 flow [2023-08-03 21:25:24,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:24,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:24,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:25:24,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:25:24,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1698924485, now seen corresponding path program 1 times [2023-08-03 21:25:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:24,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861683515] [2023-08-03 21:25:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861683515] [2023-08-03 21:25:24,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861683515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:25:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10804641] [2023-08-03 21:25:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:24,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:24,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:25:24,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:25:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:24,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:25:24,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:25:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:24,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:25:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:25:24,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10804641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:25:24,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:25:24,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:25:24,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525709081] [2023-08-03 21:25:24,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:25:24,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:25:24,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:25:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:25:24,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 224 [2023-08-03 21:25:24,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:24,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 224 [2023-08-03 21:25:24,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:24,585 INFO L124 PetriNetUnfolderBase]: 911/1482 cut-off events. [2023-08-03 21:25:24,585 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-03 21:25:24,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 1482 events. 911/1482 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7568 event pairs, 159 based on Foata normal form. 8/1414 useless extension candidates. Maximal degree in co-relation 2252. Up to 1068 conditions per place. [2023-08-03 21:25:24,592 INFO L140 encePairwiseOnDemand]: 220/224 looper letters, 46 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-03 21:25:24,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 234 flow [2023-08-03 21:25:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:25:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:25:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-03 21:25:24,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256696428571429 [2023-08-03 21:25:24,594 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-03 21:25:24,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-03 21:25:24,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:24,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-03 21:25:24,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,598 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 86 flow. Second operand 4 states and 471 transitions. [2023-08-03 21:25:24,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 234 flow [2023-08-03 21:25:24,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:24,600 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 98 flow [2023-08-03 21:25:24,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-03 21:25:24,600 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-08-03 21:25:24,601 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 98 flow [2023-08-03 21:25:24,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:24,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:24,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:25:24,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 21:25:24,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:25:24,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1920594403, now seen corresponding path program 1 times [2023-08-03 21:25:24,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:24,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464032385] [2023-08-03 21:25:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:24,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:24,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:24,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464032385] [2023-08-03 21:25:24,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464032385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:24,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:24,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:25:24,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573609481] [2023-08-03 21:25:24,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:24,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:25:24,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:25:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:25:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 224 [2023-08-03 21:25:24,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:24,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:24,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 224 [2023-08-03 21:25:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:24,989 INFO L124 PetriNetUnfolderBase]: 871/1462 cut-off events. [2023-08-03 21:25:24,989 INFO L125 PetriNetUnfolderBase]: For 807/807 co-relation queries the response was YES. [2023-08-03 21:25:24,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3311 conditions, 1462 events. 871/1462 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6888 event pairs, 304 based on Foata normal form. 9/1385 useless extension candidates. Maximal degree in co-relation 2429. Up to 1255 conditions per place. [2023-08-03 21:25:24,996 INFO L140 encePairwiseOnDemand]: 220/224 looper letters, 38 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-03 21:25:24,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 230 flow [2023-08-03 21:25:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:25:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:25:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-03 21:25:24,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282738095238095 [2023-08-03 21:25:24,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-03 21:25:24,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-03 21:25:24,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:24,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-03 21:25:24,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,001 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 98 flow. Second operand 3 states and 355 transitions. [2023-08-03 21:25:25,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 230 flow [2023-08-03 21:25:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 218 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 21:25:25,005 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 110 flow [2023-08-03 21:25:25,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-03 21:25:25,008 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-08-03 21:25:25,008 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 110 flow [2023-08-03 21:25:25,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:25,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:25,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:25:25,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:25:25,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:25,009 INFO L85 PathProgramCache]: Analyzing trace with hash -250257639, now seen corresponding path program 1 times [2023-08-03 21:25:25,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:25,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060553583] [2023-08-03 21:25:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:25:25,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:25,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060553583] [2023-08-03 21:25:25,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060553583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:25,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:25,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:25:25,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822149631] [2023-08-03 21:25:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:25,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:25:25,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:25:25,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:25:25,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 224 [2023-08-03 21:25:25,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:25,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 224 [2023-08-03 21:25:25,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:25,291 INFO L124 PetriNetUnfolderBase]: 112/276 cut-off events. [2023-08-03 21:25:25,292 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-08-03 21:25:25,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 276 events. 112/276 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 985 event pairs, 45 based on Foata normal form. 49/319 useless extension candidates. Maximal degree in co-relation 365. Up to 203 conditions per place. [2023-08-03 21:25:25,293 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 27 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-08-03 21:25:25,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 205 flow [2023-08-03 21:25:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:25:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:25:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2023-08-03 21:25:25,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966517857142857 [2023-08-03 21:25:25,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2023-08-03 21:25:25,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2023-08-03 21:25:25,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:25,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2023-08-03 21:25:25,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,299 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,299 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 110 flow. Second operand 4 states and 445 transitions. [2023-08-03 21:25:25,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 205 flow [2023-08-03 21:25:25,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:25,300 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 119 flow [2023-08-03 21:25:25,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-08-03 21:25:25,301 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-03 21:25:25,301 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 119 flow [2023-08-03 21:25:25,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:25,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:25,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:25:25,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:25:25,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1563313036, now seen corresponding path program 1 times [2023-08-03 21:25:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:25,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320308543] [2023-08-03 21:25:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:25,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 21:25:25,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:25,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320308543] [2023-08-03 21:25:25,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320308543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:25:25,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848752865] [2023-08-03 21:25:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:25,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:25,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:25:25,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:25:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:25,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-03 21:25:25,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:25:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 21:25:25,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:25:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 21:25:25,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848752865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:25:25,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:25:25,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-03 21:25:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867443158] [2023-08-03 21:25:25,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:25:25,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:25:25,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:25:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:25,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 224 [2023-08-03 21:25:25,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:25,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:25,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 224 [2023-08-03 21:25:25,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:25,997 INFO L124 PetriNetUnfolderBase]: 130/309 cut-off events. [2023-08-03 21:25:25,997 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2023-08-03 21:25:25,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 309 events. 130/309 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1102 event pairs, 33 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 409. Up to 130 conditions per place. [2023-08-03 21:25:25,998 INFO L140 encePairwiseOnDemand]: 216/224 looper letters, 57 selfloop transitions, 8 changer transitions 2/73 dead transitions. [2023-08-03 21:25:25,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 408 flow [2023-08-03 21:25:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:25:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:25:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 769 transitions. [2023-08-03 21:25:26,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49043367346938777 [2023-08-03 21:25:26,001 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 769 transitions. [2023-08-03 21:25:26,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 769 transitions. [2023-08-03 21:25:26,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:26,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 769 transitions. [2023-08-03 21:25:26,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.85714285714286) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,006 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,006 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 119 flow. Second operand 7 states and 769 transitions. [2023-08-03 21:25:26,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 408 flow [2023-08-03 21:25:26,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 399 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:26,008 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 158 flow [2023-08-03 21:25:26,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-03 21:25:26,009 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-03 21:25:26,009 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 158 flow [2023-08-03 21:25:26,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:26,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:26,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:25:26,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:25:26,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:25:26,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2101920715, now seen corresponding path program 1 times [2023-08-03 21:25:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:26,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872405226] [2023-08-03 21:25:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:26,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:26,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872405226] [2023-08-03 21:25:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872405226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:26,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:26,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:25:26,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990465624] [2023-08-03 21:25:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:26,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:25:26,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:25:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:25:26,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 224 [2023-08-03 21:25:26,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:26,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 224 [2023-08-03 21:25:26,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:26,496 INFO L124 PetriNetUnfolderBase]: 127/303 cut-off events. [2023-08-03 21:25:26,496 INFO L125 PetriNetUnfolderBase]: For 301/301 co-relation queries the response was YES. [2023-08-03 21:25:26,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 303 events. 127/303 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1057 event pairs, 24 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 469. Up to 165 conditions per place. [2023-08-03 21:25:26,498 INFO L140 encePairwiseOnDemand]: 217/224 looper letters, 49 selfloop transitions, 7 changer transitions 2/65 dead transitions. [2023-08-03 21:25:26,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 365 flow [2023-08-03 21:25:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:25:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:25:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 659 transitions. [2023-08-03 21:25:26,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49032738095238093 [2023-08-03 21:25:26,501 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 659 transitions. [2023-08-03 21:25:26,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 659 transitions. [2023-08-03 21:25:26,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:26,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 659 transitions. [2023-08-03 21:25:26,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.83333333333333) internal successors, (659), 6 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,505 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,505 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 158 flow. Second operand 6 states and 659 transitions. [2023-08-03 21:25:26,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 365 flow [2023-08-03 21:25:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:25:26,507 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 192 flow [2023-08-03 21:25:26,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-08-03 21:25:26,508 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-08-03 21:25:26,508 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 192 flow [2023-08-03 21:25:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:25:26,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:26,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 21:25:26,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:25:26,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:25:26,509 INFO L85 PathProgramCache]: Analyzing trace with hash -807354772, now seen corresponding path program 1 times [2023-08-03 21:25:26,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:25:26,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387575669] [2023-08-03 21:25:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:25:26,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:25:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:25:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:25:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:25:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387575669] [2023-08-03 21:25:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387575669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:25:26,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:25:26,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:25:26,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260281386] [2023-08-03 21:25:26,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:25:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:25:26,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:25:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:25:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:25:26,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 224 [2023-08-03 21:25:26,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 100.375) internal successors, (803), 8 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:25:26,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 224 [2023-08-03 21:25:26,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:25:26,918 INFO L124 PetriNetUnfolderBase]: 136/314 cut-off events. [2023-08-03 21:25:26,919 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2023-08-03 21:25:26,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 314 events. 136/314 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1119 event pairs, 53 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 635. Up to 164 conditions per place. [2023-08-03 21:25:26,920 INFO L140 encePairwiseOnDemand]: 213/224 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-03 21:25:26,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 460 flow [2023-08-03 21:25:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 21:25:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 21:25:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 927 transitions. [2023-08-03 21:25:26,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2023-08-03 21:25:26,923 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 927 transitions. [2023-08-03 21:25:26,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 927 transitions. [2023-08-03 21:25:26,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:25:26,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 927 transitions. [2023-08-03 21:25:26,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.0) internal successors, (927), 9 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,929 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,929 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 192 flow. Second operand 9 states and 927 transitions. [2023-08-03 21:25:26,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 460 flow [2023-08-03 21:25:26,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:25:26,931 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-03 21:25:26,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-03 21:25:26,932 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2023-08-03 21:25:26,932 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-03 21:25:26,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.375) internal successors, (803), 8 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:25:26,932 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-03 21:25:26,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 21:25:26,933 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:25:26,933 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-03 21:25:26,933 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:25:26,933 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:25:26,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:25:26 BasicIcfg [2023-08-03 21:25:26,937 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:25:26,938 INFO L158 Benchmark]: Toolchain (without parser) took 11566.83ms. Allocated memory was 348.1MB in the beginning and 601.9MB in the end (delta: 253.8MB). Free memory was 300.7MB in the beginning and 412.0MB in the end (delta: -111.3MB). Peak memory consumption was 143.9MB. Max. memory is 16.0GB. [2023-08-03 21:25:26,938 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 348.1MB. Free memory is still 301.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:25:26,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 447.62ms. Allocated memory is still 348.1MB. Free memory was 300.3MB in the beginning and 280.3MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 21:25:26,938 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.42ms. Allocated memory is still 348.1MB. Free memory was 280.3MB in the beginning and 278.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:25:26,938 INFO L158 Benchmark]: Boogie Preprocessor took 35.62ms. Allocated memory is still 348.1MB. Free memory was 278.3MB in the beginning and 276.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:25:26,939 INFO L158 Benchmark]: RCFGBuilder took 429.09ms. Allocated memory is still 348.1MB. Free memory was 276.9MB in the beginning and 262.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 21:25:26,939 INFO L158 Benchmark]: TraceAbstraction took 10586.91ms. Allocated memory was 348.1MB in the beginning and 601.9MB in the end (delta: 253.8MB). Free memory was 261.8MB in the beginning and 412.0MB in the end (delta: -150.1MB). Peak memory consumption was 106.1MB. Max. memory is 16.0GB. [2023-08-03 21:25:26,940 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 348.1MB. Free memory is still 301.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 447.62ms. Allocated memory is still 348.1MB. Free memory was 300.3MB in the beginning and 280.3MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.42ms. Allocated memory is still 348.1MB. Free memory was 280.3MB in the beginning and 278.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.62ms. Allocated memory is still 348.1MB. Free memory was 278.3MB in the beginning and 276.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 429.09ms. Allocated memory is still 348.1MB. Free memory was 276.9MB in the beginning and 262.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 10586.91ms. Allocated memory was 348.1MB in the beginning and 601.9MB in the end (delta: 253.8MB). Free memory was 261.8MB in the beginning and 412.0MB in the end (delta: -150.1MB). Peak memory consumption was 106.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 88 PlacesBefore, 26 PlacesAfterwards, 98 TransitionsBefore, 32 TransitionsAfterwards, 2408 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 78 TotalNumberOfCompositions, 3879 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2392, independent: 2263, independent conditional: 0, independent unconditional: 2263, dependent: 129, dependent conditional: 0, dependent unconditional: 129, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1244, independent: 1216, independent conditional: 0, independent unconditional: 1216, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2392, independent: 1047, independent conditional: 0, independent unconditional: 1047, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 1244, unknown conditional: 0, unknown unconditional: 1244] , Statistics on independence cache: Total cache size (in pairs): 86, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 117 PlacesBefore, 45 PlacesAfterwards, 133 TransitionsBefore, 57 TransitionsAfterwards, 7000 CoEnabledTransitionPairs, 5 FixpointIterations, 25 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 4 ChoiceCompositions, 92 TotalNumberOfCompositions, 14688 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6464, independent: 6243, independent conditional: 0, independent unconditional: 6243, dependent: 221, dependent conditional: 0, dependent unconditional: 221, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3268, independent: 3215, independent conditional: 0, independent unconditional: 3215, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6464, independent: 3028, independent conditional: 0, independent unconditional: 3028, dependent: 168, dependent conditional: 0, dependent unconditional: 168, unknown: 3268, unknown conditional: 0, unknown unconditional: 3268] , Statistics on independence cache: Total cache size (in pairs): 216, Positive cache size: 192, Positive conditional cache size: 0, Positive unconditional cache size: 192, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 117 PlacesBefore, 46 PlacesAfterwards, 133 TransitionsBefore, 59 TransitionsAfterwards, 7000 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 3 ChoiceCompositions, 91 TotalNumberOfCompositions, 16435 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7139, independent: 6883, independent conditional: 0, independent unconditional: 6883, dependent: 256, dependent conditional: 0, dependent unconditional: 256, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3275, independent: 3223, independent conditional: 0, independent unconditional: 3223, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7139, independent: 3660, independent conditional: 0, independent unconditional: 3660, dependent: 204, dependent conditional: 0, dependent unconditional: 204, unknown: 3275, unknown conditional: 0, unknown unconditional: 3275] , Statistics on independence cache: Total cache size (in pairs): 240, Positive cache size: 216, Positive conditional cache size: 0, Positive unconditional cache size: 216, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 113 locations, 2 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: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred 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, 136 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.0s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 118 IncrementalHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 118 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=132occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 136 locations, 2 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: 4.9s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 357 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 252 mSDsluCounter, 107 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 92 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1116 IncrementalHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 15 mSDtfsCounter, 1116 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=6, InterpolantAutomatonStates: 36, 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, 0.8s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 710 SizeOfPredicates, 3 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 36/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 21:25:26,958 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...