/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-figure1-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:25:56,794 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:25:56,874 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:25:56,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:25:56,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:25:56,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:25:56,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:25:56,907 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:25:56,908 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:25:56,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:25:56,912 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:25:56,912 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:25:56,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:25:56,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:25:56,914 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:25:56,915 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:25:56,915 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:25:56,915 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:25:56,915 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:25:56,915 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:25:56,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:25:56,916 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:25:56,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:25:56,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:25:56,918 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:25:56,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:25:56,918 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:25:56,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:25:56,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:25:56,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:25:56,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:25:56,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:25:56,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:25:56,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:25:56,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:25:56,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:25:56,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:25:56,921 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:25:56,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:25:56,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:25:56,922 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:25:56,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:25:57,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:25:57,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:25:57,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:25:57,173 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:25:57,174 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:25:57,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-figure1-alt.wvr_bound2.c [2023-08-03 20:25:58,433 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:25:58,626 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:25:58,626 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-figure1-alt.wvr_bound2.c [2023-08-03 20:25:58,633 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13482dfdf/3accfd0d98f54aa7b4f5fc178256d3d6/FLAGa5ca24f74 [2023-08-03 20:25:58,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13482dfdf/3accfd0d98f54aa7b4f5fc178256d3d6 [2023-08-03 20:25:58,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:25:58,650 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:25:58,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:25:58,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:25:58,654 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:25:58,654 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,655 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc31c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58, skipping insertion in model container [2023-08-03 20:25:58,655 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,674 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:25:58,830 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-figure1-alt.wvr_bound2.c[2249,2262] [2023-08-03 20:25:58,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:25:58,838 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:25:58,856 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-figure1-alt.wvr_bound2.c[2249,2262] [2023-08-03 20:25:58,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:25:58,864 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:25:58,864 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:25:58,870 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:25:58,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58 WrapperNode [2023-08-03 20:25:58,870 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:25:58,871 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:25:58,871 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:25:58,871 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:25:58,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,899 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 110 [2023-08-03 20:25:58,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:25:58,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:25:58,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:25:58,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:25:58,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,918 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,920 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,921 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,923 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:25:58,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:25:58,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:25:58,924 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:25:58,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (1/1) ... [2023-08-03 20:25:58,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:25:58,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:25:58,955 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 20:25:58,983 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 20:25:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:25:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:25:58,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:25:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:25:58,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:25:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:25:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:25:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:25:58,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:25:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:25:58,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:25:59,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:25:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:25:59,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:25:59,002 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 20:25:59,103 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:25:59,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:25:59,364 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:25:59,408 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:25:59,408 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 20:25:59,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:25:59 BoogieIcfgContainer [2023-08-03 20:25:59,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:25:59,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:25:59,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:25:59,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:25:59,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:25:58" (1/3) ... [2023-08-03 20:25:59,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517ef902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:25:59, skipping insertion in model container [2023-08-03 20:25:59,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:25:58" (2/3) ... [2023-08-03 20:25:59,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517ef902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:25:59, skipping insertion in model container [2023-08-03 20:25:59,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:25:59" (3/3) ... [2023-08-03 20:25:59,421 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-figure1-alt.wvr_bound2.c [2023-08-03 20:25:59,427 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:25:59,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:25:59,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:25:59,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:25:59,476 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:25:59,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 250 flow [2023-08-03 20:25:59,588 INFO L124 PetriNetUnfolderBase]: 33/254 cut-off events. [2023-08-03 20:25:59,588 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:25:59,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 254 events. 33/254 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 848 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-03 20:25:59,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 250 flow [2023-08-03 20:25:59,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 114 transitions, 250 flow [2023-08-03 20:25:59,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:25:59,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 114 transitions, 250 flow [2023-08-03 20:25:59,620 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 114 transitions, 250 flow [2023-08-03 20:25:59,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 250 flow [2023-08-03 20:25:59,691 INFO L124 PetriNetUnfolderBase]: 33/254 cut-off events. [2023-08-03 20:25:59,692 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:25:59,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 254 events. 33/254 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 848 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-03 20:25:59,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-03 20:26:02,084 INFO L134 LiptonReduction]: Checked pairs total: 3016 [2023-08-03 20:26:02,084 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-03 20:26:02,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:26:02,102 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;@3b784a83, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:26:02,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:26:02,105 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:26:02,105 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 20:26:02,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:26:02,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:02,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:26:02,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:02,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash 440303137, now seen corresponding path program 1 times [2023-08-03 20:26:02,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:02,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671123628] [2023-08-03 20:26:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:02,296 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 20:26:02,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:02,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671123628] [2023-08-03 20:26:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671123628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:02,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:26:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440249528] [2023-08-03 20:26:02,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:02,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:26:02,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:26:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:26:02,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 214 [2023-08-03 20:26:02,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 20:26:02,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:02,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 214 [2023-08-03 20:26:02,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:02,449 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-03 20:26:02,449 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 20:26:02,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 420 events. 260/420 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1612 event pairs, 86 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 692. Up to 390 conditions per place. [2023-08-03 20:26:02,455 INFO L140 encePairwiseOnDemand]: 210/214 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 20:26:02,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-03 20:26:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:26:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:26:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-03 20:26:02,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781931464174455 [2023-08-03 20:26:02,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-03 20:26:02,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-03 20:26:02,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:02,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-03 20:26:02,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 20:26:02,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 20:26:02,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 20:26:02,491 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 307 transitions. [2023-08-03 20:26:02,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-03 20:26:02,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:26:02,497 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 88 flow [2023-08-03 20:26:02,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-03 20:26:02,502 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 20:26:02,503 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 88 flow [2023-08-03 20:26:02,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 20:26:02,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:02,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 20:26:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:26:02,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:02,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash 798037067, now seen corresponding path program 1 times [2023-08-03 20:26:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288543953] [2023-08-03 20:26:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:02,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:26:02,549 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:26:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:26:02,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:26:02,587 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:26:02,588 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:26:02,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:26:02,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:26:02,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:26:02,592 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:26:02,595 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:26:02,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:26:02,624 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:26:02,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 140 transitions, 328 flow [2023-08-03 20:26:02,711 INFO L124 PetriNetUnfolderBase]: 134/829 cut-off events. [2023-08-03 20:26:02,711 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:26:02,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 829 events. 134/829 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4223 event pairs, 1 based on Foata normal form. 0/692 useless extension candidates. Maximal degree in co-relation 479. Up to 32 conditions per place. [2023-08-03 20:26:02,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 140 transitions, 328 flow [2023-08-03 20:26:02,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 140 transitions, 328 flow [2023-08-03 20:26:02,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:26:02,721 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 140 transitions, 328 flow [2023-08-03 20:26:02,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 140 transitions, 328 flow [2023-08-03 20:26:02,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 140 transitions, 328 flow [2023-08-03 20:26:02,798 INFO L124 PetriNetUnfolderBase]: 134/829 cut-off events. [2023-08-03 20:26:02,799 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:26:02,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 829 events. 134/829 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4223 event pairs, 1 based on Foata normal form. 0/692 useless extension candidates. Maximal degree in co-relation 479. Up to 32 conditions per place. [2023-08-03 20:26:02,818 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-03 20:26:05,257 INFO L134 LiptonReduction]: Checked pairs total: 8705 [2023-08-03 20:26:05,257 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-03 20:26:05,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:26:05,260 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;@3b784a83, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:26:05,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:26:05,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:26:05,262 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 20:26:05,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:26:05,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:05,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:26:05,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:05,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash 702705299, now seen corresponding path program 1 times [2023-08-03 20:26:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:05,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750902638] [2023-08-03 20:26:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:05,326 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 20:26:05,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:05,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750902638] [2023-08-03 20:26:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750902638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:05,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:05,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:26:05,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966048795] [2023-08-03 20:26:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:26:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:26:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:26:05,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 251 [2023-08-03 20:26:05,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 20:26:05,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:05,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 251 [2023-08-03 20:26:05,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:06,173 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-03 20:26:06,174 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-03 20:26:06,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 47497 event pairs, 3472 based on Foata normal form. 0/6248 useless extension candidates. Maximal degree in co-relation 6836. Up to 10600 conditions per place. [2023-08-03 20:26:06,249 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-03 20:26:06,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-03 20:26:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:26:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:26:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-03 20:26:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860557768924303 [2023-08-03 20:26:06,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-03 20:26:06,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-03 20:26:06,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:06,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-03 20:26:06,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 20:26:06,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:06,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:06,259 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 366 transitions. [2023-08-03 20:26:06,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-03 20:26:06,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:26:06,265 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 146 flow [2023-08-03 20:26:06,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=146, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-03 20:26:06,265 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-03 20:26:06,266 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 146 flow [2023-08-03 20:26:06,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 20:26:06,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:06,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:06,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:26:06,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:06,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1604422225, now seen corresponding path program 1 times [2023-08-03 20:26:06,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:06,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603653540] [2023-08-03 20:26:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:06,363 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 20:26:06,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603653540] [2023-08-03 20:26:06,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603653540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386509582] [2023-08-03 20:26:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:06,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:06,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:06,377 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 20:26:06,391 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 20:26:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:06,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:26:06,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:26:06,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:26:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386509582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:06,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:26:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:26:06,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992396350] [2023-08-03 20:26:06,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:26:06,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:26:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:26:06,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 251 [2023-08-03 20:26:06,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 20:26:06,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:06,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 251 [2023-08-03 20:26:06,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:07,140 INFO L124 PetriNetUnfolderBase]: 8488/11053 cut-off events. [2023-08-03 20:26:07,140 INFO L125 PetriNetUnfolderBase]: For 874/874 co-relation queries the response was YES. [2023-08-03 20:26:07,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22377 conditions, 11053 events. 8488/11053 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 49874 event pairs, 3438 based on Foata normal form. 0/6301 useless extension candidates. Maximal degree in co-relation 22347. Up to 10389 conditions per place. [2023-08-03 20:26:07,218 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 40 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 20:26:07,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 246 flow [2023-08-03 20:26:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:26:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:26:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-03 20:26:07,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4900398406374502 [2023-08-03 20:26:07,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-03 20:26:07,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-03 20:26:07,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:07,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-03 20:26:07,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 20:26:07,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:07,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:07,224 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 146 flow. Second operand 3 states and 369 transitions. [2023-08-03 20:26:07,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 246 flow [2023-08-03 20:26:07,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:26:07,229 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2023-08-03 20:26:07,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-03 20:26:07,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-03 20:26:07,231 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2023-08-03 20:26:07,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 20:26:07,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:07,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 20:26:07,237 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 20:26:07,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:07,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:07,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1148916396, now seen corresponding path program 1 times [2023-08-03 20:26:07,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:07,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242299241] [2023-08-03 20:26:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:07,484 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 20:26:07,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:07,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242299241] [2023-08-03 20:26:07,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242299241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:07,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238331903] [2023-08-03 20:26:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:07,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:07,488 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 20:26:07,506 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 20:26:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:07,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:26:07,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:07,616 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 20:26:07,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:26:07,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238331903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:07,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:26:07,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 20:26:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716132793] [2023-08-03 20:26:07,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:07,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:26:07,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:26:07,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:26:07,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-03 20:26:07,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 20:26:07,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:07,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-03 20:26:07,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:08,301 INFO L124 PetriNetUnfolderBase]: 8480/11030 cut-off events. [2023-08-03 20:26:08,302 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-08-03 20:26:08,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22615 conditions, 11030 events. 8480/11030 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 49208 event pairs, 2430 based on Foata normal form. 9/6435 useless extension candidates. Maximal degree in co-relation 6924. Up to 10511 conditions per place. [2023-08-03 20:26:08,434 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-03 20:26:08,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 257 flow [2023-08-03 20:26:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:26:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:26:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-08-03 20:26:08,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645418326693227 [2023-08-03 20:26:08,436 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-08-03 20:26:08,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-08-03 20:26:08,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:08,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-08-03 20:26:08,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 20:26:08,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states 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 20:26:08,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states 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 20:26:08,441 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 5 states and 583 transitions. [2023-08-03 20:26:08,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 257 flow [2023-08-03 20:26:08,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 248 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:26:08,445 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 165 flow [2023-08-03 20:26:08,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-03 20:26:08,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-03 20:26:08,446 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 165 flow [2023-08-03 20:26:08,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 20:26:08,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:08,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:08,453 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 20:26:08,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:08,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:08,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash -111724804, now seen corresponding path program 1 times [2023-08-03 20:26:08,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:08,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182089548] [2023-08-03 20:26:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:08,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:26:08,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:08,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182089548] [2023-08-03 20:26:08,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182089548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:08,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483474671] [2023-08-03 20:26:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:08,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:08,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:08,724 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 20:26:08,729 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 20:26:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:08,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:26:08,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:26:08,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:26:08,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483474671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:08,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:26:08,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:26:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829777255] [2023-08-03 20:26:08,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:08,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:26:08,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:26:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:26:08,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 251 [2023-08-03 20:26:08,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 20:26:08,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:08,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 251 [2023-08-03 20:26:08,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:09,465 INFO L124 PetriNetUnfolderBase]: 7233/9555 cut-off events. [2023-08-03 20:26:09,465 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2023-08-03 20:26:09,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19560 conditions, 9555 events. 7233/9555 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43565 event pairs, 2468 based on Foata normal form. 0/5681 useless extension candidates. Maximal degree in co-relation 6706. Up to 6763 conditions per place. [2023-08-03 20:26:09,515 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 48 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:26:09,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 303 flow [2023-08-03 20:26:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:26:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:26:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-03 20:26:09,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49800796812749004 [2023-08-03 20:26:09,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-03 20:26:09,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-03 20:26:09,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:09,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-03 20:26:09,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 20:26:09,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:09,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:09,521 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 165 flow. Second operand 3 states and 375 transitions. [2023-08-03 20:26:09,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 303 flow [2023-08-03 20:26:09,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:26:09,524 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 170 flow [2023-08-03 20:26:09,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-03 20:26:09,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 20:26:09,529 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 170 flow [2023-08-03 20:26:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 20:26:09,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:09,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:09,539 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 20:26:09,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:09,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:09,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash 794468992, now seen corresponding path program 1 times [2023-08-03 20:26:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:09,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842343586] [2023-08-03 20:26:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:26:09,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842343586] [2023-08-03 20:26:09,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842343586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:09,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191414643] [2023-08-03 20:26:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:09,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:09,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:09,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:09,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 20:26:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:09,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:26:09,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:26:09,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:26:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:26:09,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191414643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:26:09,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:26:09,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:26:09,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661571231] [2023-08-03 20:26:09,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:26:09,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:26:09,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:26:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:26:09,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-03 20:26:09,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 20:26:09,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:09,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-03 20:26:09,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:10,491 INFO L124 PetriNetUnfolderBase]: 6552/8619 cut-off events. [2023-08-03 20:26:10,491 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2023-08-03 20:26:10,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 8619 events. 6552/8619 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38191 event pairs, 1930 based on Foata normal form. 3/5259 useless extension candidates. Maximal degree in co-relation 5227. Up to 8209 conditions per place. [2023-08-03 20:26:10,548 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-03 20:26:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 264 flow [2023-08-03 20:26:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:26:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:26:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-08-03 20:26:10,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721115537848606 [2023-08-03 20:26:10,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-08-03 20:26:10,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-08-03 20:26:10,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:10,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-08-03 20:26:10,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 20:26:10,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:10,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:10,554 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 170 flow. Second operand 4 states and 474 transitions. [2023-08-03 20:26:10,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 264 flow [2023-08-03 20:26:10,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:26:10,559 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 166 flow [2023-08-03 20:26:10,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 20:26:10,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:26:10,560 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 166 flow [2023-08-03 20:26:10,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 20:26:10,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:10,561 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:10,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 20:26:10,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:10,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:10,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1473242237, now seen corresponding path program 1 times [2023-08-03 20:26:10,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:10,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462940238] [2023-08-03 20:26:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:26:10,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462940238] [2023-08-03 20:26:10,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462940238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353501161] [2023-08-03 20:26:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:10,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:10,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:10,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:10,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 20:26:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:10,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:26:10,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:26:10,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:26:10,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353501161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:10,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:26:10,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:26:10,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451331945] [2023-08-03 20:26:10,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:10,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:26:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:10,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:26:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:26:10,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-03 20:26:10,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 20:26:10,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:10,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-03 20:26:10,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:11,444 INFO L124 PetriNetUnfolderBase]: 6120/8079 cut-off events. [2023-08-03 20:26:11,444 INFO L125 PetriNetUnfolderBase]: For 821/821 co-relation queries the response was YES. [2023-08-03 20:26:11,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16970 conditions, 8079 events. 6120/8079 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36225 event pairs, 400 based on Foata normal form. 81/5013 useless extension candidates. Maximal degree in co-relation 7300. Up to 6966 conditions per place. [2023-08-03 20:26:11,489 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 52 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 20:26:11,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 316 flow [2023-08-03 20:26:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:26:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:26:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 595 transitions. [2023-08-03 20:26:11,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47410358565737054 [2023-08-03 20:26:11,492 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 595 transitions. [2023-08-03 20:26:11,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 595 transitions. [2023-08-03 20:26:11,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:11,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 595 transitions. [2023-08-03 20:26:11,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states 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 20:26:11,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states 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 20:26:11,496 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states 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 20:26:11,496 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 166 flow. Second operand 5 states and 595 transitions. [2023-08-03 20:26:11,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 316 flow [2023-08-03 20:26:11,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:26:11,502 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 171 flow [2023-08-03 20:26:11,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 20:26:11,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:26:11,503 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 171 flow [2023-08-03 20:26:11,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 20:26:11,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:11,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:11,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 20:26:11,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:11,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:11,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1723854206, now seen corresponding path program 1 times [2023-08-03 20:26:11,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:11,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297537655] [2023-08-03 20:26:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:11,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:26:11,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297537655] [2023-08-03 20:26:11,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297537655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168437930] [2023-08-03 20:26:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:11,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:11,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:11,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:11,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 20:26:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:11,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:26:11,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:26:11,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:26:11,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168437930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:11,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:26:11,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:26:11,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51466742] [2023-08-03 20:26:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:11,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:26:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:26:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:26:11,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 251 [2023-08-03 20:26:11,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 20:26:11,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:11,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 251 [2023-08-03 20:26:11,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:12,305 INFO L124 PetriNetUnfolderBase]: 5997/8008 cut-off events. [2023-08-03 20:26:12,305 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-03 20:26:12,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17005 conditions, 8008 events. 5997/8008 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36450 event pairs, 2243 based on Foata normal form. 0/5017 useless extension candidates. Maximal degree in co-relation 7491. Up to 5805 conditions per place. [2023-08-03 20:26:12,343 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:26:12,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 309 flow [2023-08-03 20:26:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:26:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:26:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-03 20:26:12,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49800796812749004 [2023-08-03 20:26:12,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-03 20:26:12,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-03 20:26:12,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:12,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-03 20:26:12,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 20:26:12,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:12,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 20:26:12,348 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 171 flow. Second operand 3 states and 375 transitions. [2023-08-03 20:26:12,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 309 flow [2023-08-03 20:26:12,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 302 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:26:12,353 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 176 flow [2023-08-03 20:26:12,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-03 20:26:12,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-03 20:26:12,354 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 176 flow [2023-08-03 20:26:12,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 20:26:12,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:12,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:12,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 20:26:12,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:12,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:12,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash -8248914, now seen corresponding path program 1 times [2023-08-03 20:26:12,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:12,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950706724] [2023-08-03 20:26:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:26:12,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950706724] [2023-08-03 20:26:12,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950706724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30702378] [2023-08-03 20:26:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:12,617 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:12,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 20:26:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:12,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:26:12,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:26:12,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:26:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:26:12,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30702378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:26:12,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:26:12,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:26:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126495216] [2023-08-03 20:26:12,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:26:12,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:26:12,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:26:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:26:12,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-03 20:26:12,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 20:26:12,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:12,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-03 20:26:12,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:13,145 INFO L124 PetriNetUnfolderBase]: 5682/7585 cut-off events. [2023-08-03 20:26:13,145 INFO L125 PetriNetUnfolderBase]: For 1241/1241 co-relation queries the response was YES. [2023-08-03 20:26:13,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 7585 events. 5682/7585 cut-off events. For 1241/1241 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 34882 event pairs, 1645 based on Foata normal form. 27/4832 useless extension candidates. Maximal degree in co-relation 10425. Up to 6552 conditions per place. [2023-08-03 20:26:13,185 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 49 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 20:26:13,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 304 flow [2023-08-03 20:26:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:26:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:26:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-03 20:26:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4800796812749004 [2023-08-03 20:26:13,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-03 20:26:13,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-03 20:26:13,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:13,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-03 20:26:13,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:13,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:13,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:13,190 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 176 flow. Second operand 4 states and 482 transitions. [2023-08-03 20:26:13,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 304 flow [2023-08-03 20:26:13,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:26:13,216 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 172 flow [2023-08-03 20:26:13,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-03 20:26:13,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-03 20:26:13,217 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 172 flow [2023-08-03 20:26:13,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 20:26:13,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:13,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:13,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 20:26:13,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:13,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:13,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1561619302, now seen corresponding path program 1 times [2023-08-03 20:26:13,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:13,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644389305] [2023-08-03 20:26:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:13,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:26:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644389305] [2023-08-03 20:26:13,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644389305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105206116] [2023-08-03 20:26:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:13,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:13,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:13,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 20:26:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:13,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:26:13,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:26:13,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:26:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:26:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105206116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:26:13,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:26:13,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:26:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235961769] [2023-08-03 20:26:13,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:26:13,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:26:13,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:13,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:26:13,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:26:13,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-03 20:26:13,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 20:26:13,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:13,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-03 20:26:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:13,920 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-03 20:26:13,920 INFO L125 PetriNetUnfolderBase]: For 1255/1255 co-relation queries the response was YES. [2023-08-03 20:26:13,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11920 conditions, 5529 events. 4136/5529 cut-off events. For 1255/1255 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22842 event pairs, 747 based on Foata normal form. 108/3585 useless extension candidates. Maximal degree in co-relation 10506. Up to 2080 conditions per place. [2023-08-03 20:26:13,940 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-03 20:26:13,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 342 flow [2023-08-03 20:26:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:26:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:26:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-03 20:26:13,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48705179282868527 [2023-08-03 20:26:13,943 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-03 20:26:13,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-03 20:26:13,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:13,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-03 20:26:13,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:13,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:13,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:13,946 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 172 flow. Second operand 4 states and 489 transitions. [2023-08-03 20:26:13,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 342 flow [2023-08-03 20:26:13,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:26:13,952 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 186 flow [2023-08-03 20:26:13,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-03 20:26:13,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 20:26:13,953 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 186 flow [2023-08-03 20:26:13,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 20:26:13,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:13,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:13,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 20:26:14,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 20:26:14,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:14,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:14,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1420213894, now seen corresponding path program 1 times [2023-08-03 20:26:14,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:14,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510643234] [2023-08-03 20:26:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:14,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:26:14,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510643234] [2023-08-03 20:26:14,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510643234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:14,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645609164] [2023-08-03 20:26:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:14,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:14,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:14,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 20:26:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:14,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:26:14,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:26:14,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:26:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:26:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645609164] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:26:14,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:26:14,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:26:14,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780319071] [2023-08-03 20:26:14,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:26:14,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:26:14,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:26:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:26:14,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-03 20:26:14,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 20:26:14,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:14,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-03 20:26:14,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:14,657 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-03 20:26:14,657 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-03 20:26:14,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 5502 events. 4120/5502 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22665 event pairs, 1861 based on Foata normal form. 13/3471 useless extension candidates. Maximal degree in co-relation 11152. Up to 4661 conditions per place. [2023-08-03 20:26:14,679 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-03 20:26:14,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 358 flow [2023-08-03 20:26:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:26:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:26:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-03 20:26:14,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48705179282868527 [2023-08-03 20:26:14,681 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-03 20:26:14,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-03 20:26:14,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:14,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-03 20:26:14,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:14,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:14,684 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 20:26:14,684 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 186 flow. Second operand 4 states and 489 transitions. [2023-08-03 20:26:14,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 358 flow [2023-08-03 20:26:14,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:26:14,697 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 190 flow [2023-08-03 20:26:14,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-03 20:26:14,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 20:26:14,697 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 190 flow [2023-08-03 20:26:14,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 20:26:14,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:14,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:14,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 20:26:14,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:14,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:14,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2122488077, now seen corresponding path program 1 times [2023-08-03 20:26:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:14,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531530531] [2023-08-03 20:26:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:14,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:26:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531530531] [2023-08-03 20:26:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531530531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987105890] [2023-08-03 20:26:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:15,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:15,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:15,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 20:26:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:15,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-03 20:26:15,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:26:15,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:26:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:26:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987105890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:26:15,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:26:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-03 20:26:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153957282] [2023-08-03 20:26:15,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:26:15,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 20:26:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 20:26:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2023-08-03 20:26:16,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-03 20:26:16,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 190 flow. Second operand has 17 states, 17 states have (on average 105.29411764705883) internal successors, (1790), 17 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:16,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:16,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-03 20:26:16,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:17,333 INFO L124 PetriNetUnfolderBase]: 6550/9172 cut-off events. [2023-08-03 20:26:17,334 INFO L125 PetriNetUnfolderBase]: For 5753/5753 co-relation queries the response was YES. [2023-08-03 20:26:17,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22141 conditions, 9172 events. 6550/9172 cut-off events. For 5753/5753 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 47097 event pairs, 305 based on Foata normal form. 2/6600 useless extension candidates. Maximal degree in co-relation 21846. Up to 5211 conditions per place. [2023-08-03 20:26:17,374 INFO L140 encePairwiseOnDemand]: 241/251 looper letters, 250 selfloop transitions, 26 changer transitions 11/293 dead transitions. [2023-08-03 20:26:17,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 293 transitions, 1939 flow [2023-08-03 20:26:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 20:26:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 20:26:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1367 transitions. [2023-08-03 20:26:17,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495110467222021 [2023-08-03 20:26:17,381 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1367 transitions. [2023-08-03 20:26:17,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1367 transitions. [2023-08-03 20:26:17,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:17,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1367 transitions. [2023-08-03 20:26:17,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.27272727272727) internal successors, (1367), 11 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states 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 20:26:17,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 20:26:17,388 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 20:26:17,389 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 190 flow. Second operand 11 states and 1367 transitions. [2023-08-03 20:26:17,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 293 transitions, 1939 flow [2023-08-03 20:26:17,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 293 transitions, 1874 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-03 20:26:17,483 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 332 flow [2023-08-03 20:26:17,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=332, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-08-03 20:26:17,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2023-08-03 20:26:17,484 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 332 flow [2023-08-03 20:26:17,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.29411764705883) internal successors, (1790), 17 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:17,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:17,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:17,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 20:26:17,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 20:26:17,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:17,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2114406907, now seen corresponding path program 2 times [2023-08-03 20:26:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:17,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774438030] [2023-08-03 20:26:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:26:18,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:18,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774438030] [2023-08-03 20:26:18,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774438030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:18,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:18,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:26:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158584193] [2023-08-03 20:26:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:18,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:26:18,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:26:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:26:18,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:26:18,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 20:26:18,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:18,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:26:18,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:18,954 INFO L124 PetriNetUnfolderBase]: 7516/10922 cut-off events. [2023-08-03 20:26:18,954 INFO L125 PetriNetUnfolderBase]: For 11498/11502 co-relation queries the response was YES. [2023-08-03 20:26:18,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33106 conditions, 10922 events. 7516/10922 cut-off events. For 11498/11502 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 60919 event pairs, 1042 based on Foata normal form. 5/10657 useless extension candidates. Maximal degree in co-relation 32245. Up to 7624 conditions per place. [2023-08-03 20:26:18,994 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 158 selfloop transitions, 27 changer transitions 8/200 dead transitions. [2023-08-03 20:26:18,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 200 transitions, 1345 flow [2023-08-03 20:26:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:26:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:26:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 870 transitions. [2023-08-03 20:26:18,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49516220830961866 [2023-08-03 20:26:18,996 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 870 transitions. [2023-08-03 20:26:18,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 870 transitions. [2023-08-03 20:26:18,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:18,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 870 transitions. [2023-08-03 20:26:18,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:19,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:19,001 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:19,002 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 332 flow. Second operand 7 states and 870 transitions. [2023-08-03 20:26:19,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 200 transitions, 1345 flow [2023-08-03 20:26:19,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 200 transitions, 1331 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-03 20:26:19,040 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 494 flow [2023-08-03 20:26:19,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=494, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2023-08-03 20:26:19,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2023-08-03 20:26:19,041 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 494 flow [2023-08-03 20:26:19,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 20:26:19,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:19,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:19,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:26:19,042 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:19,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:19,042 INFO L85 PathProgramCache]: Analyzing trace with hash -687881895, now seen corresponding path program 1 times [2023-08-03 20:26:19,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:19,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417003224] [2023-08-03 20:26:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:19,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:26:19,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:19,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417003224] [2023-08-03 20:26:19,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417003224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:19,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:26:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586223378] [2023-08-03 20:26:19,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:19,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:26:19,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:26:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:26:19,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:26:19,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 494 flow. Second operand has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:19,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:19,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:26:19,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:20,552 INFO L124 PetriNetUnfolderBase]: 8940/13367 cut-off events. [2023-08-03 20:26:20,552 INFO L125 PetriNetUnfolderBase]: For 24033/24738 co-relation queries the response was YES. [2023-08-03 20:26:20,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44425 conditions, 13367 events. 8940/13367 cut-off events. For 24033/24738 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 80621 event pairs, 1439 based on Foata normal form. 612/13389 useless extension candidates. Maximal degree in co-relation 43165. Up to 8248 conditions per place. [2023-08-03 20:26:20,621 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 157 selfloop transitions, 41 changer transitions 13/221 dead transitions. [2023-08-03 20:26:20,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 221 transitions, 1634 flow [2023-08-03 20:26:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:26:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:26:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 869 transitions. [2023-08-03 20:26:20,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945930563460444 [2023-08-03 20:26:20,624 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 869 transitions. [2023-08-03 20:26:20,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 869 transitions. [2023-08-03 20:26:20,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:20,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 869 transitions. [2023-08-03 20:26:20,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.14285714285714) internal successors, (869), 7 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 20:26:20,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:20,629 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:20,629 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 494 flow. Second operand 7 states and 869 transitions. [2023-08-03 20:26:20,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 221 transitions, 1634 flow [2023-08-03 20:26:20,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 221 transitions, 1577 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-03 20:26:20,748 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 666 flow [2023-08-03 20:26:20,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=666, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2023-08-03 20:26:20,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2023-08-03 20:26:20,748 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 666 flow [2023-08-03 20:26:20,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:20,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:20,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:20,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 20:26:20,749 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:20,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1019848097, now seen corresponding path program 3 times [2023-08-03 20:26:20,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:20,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805091648] [2023-08-03 20:26:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:20,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:26:21,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:21,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805091648] [2023-08-03 20:26:21,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805091648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:21,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:21,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:26:21,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221570719] [2023-08-03 20:26:21,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:21,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:26:21,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:26:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:26:21,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:26:21,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 666 flow. Second operand has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:21,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:21,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:26:21,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:22,408 INFO L124 PetriNetUnfolderBase]: 10513/16194 cut-off events. [2023-08-03 20:26:22,408 INFO L125 PetriNetUnfolderBase]: For 34833/36592 co-relation queries the response was YES. [2023-08-03 20:26:22,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59394 conditions, 16194 events. 10513/16194 cut-off events. For 34833/36592 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 105965 event pairs, 1600 based on Foata normal form. 1548/17032 useless extension candidates. Maximal degree in co-relation 58977. Up to 8532 conditions per place. [2023-08-03 20:26:22,497 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 170 selfloop transitions, 53 changer transitions 16/250 dead transitions. [2023-08-03 20:26:22,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 250 transitions, 2008 flow [2023-08-03 20:26:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:26:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:26:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2023-08-03 20:26:22,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968696642003415 [2023-08-03 20:26:22,499 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2023-08-03 20:26:22,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2023-08-03 20:26:22,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:22,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2023-08-03 20:26:22,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 0 states have call successors, (0), 0 states 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 20:26:22,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:22,503 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:22,503 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 666 flow. Second operand 7 states and 873 transitions. [2023-08-03 20:26:22,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 250 transitions, 2008 flow [2023-08-03 20:26:22,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 250 transitions, 1915 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-03 20:26:22,654 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 855 flow [2023-08-03 20:26:22,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2023-08-03 20:26:22,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2023-08-03 20:26:22,654 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 855 flow [2023-08-03 20:26:22,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:22,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:22,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:22,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 20:26:22,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:22,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:22,655 INFO L85 PathProgramCache]: Analyzing trace with hash 486913469, now seen corresponding path program 4 times [2023-08-03 20:26:22,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:22,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181030607] [2023-08-03 20:26:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:22,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:26:23,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181030607] [2023-08-03 20:26:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181030607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:23,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:26:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425041800] [2023-08-03 20:26:23,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:23,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:26:23,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:26:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:26:23,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:26:23,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 855 flow. Second operand has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 20:26:23,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:23,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:26:23,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:24,791 INFO L124 PetriNetUnfolderBase]: 11398/17700 cut-off events. [2023-08-03 20:26:24,792 INFO L125 PetriNetUnfolderBase]: For 51267/52323 co-relation queries the response was YES. [2023-08-03 20:26:24,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68843 conditions, 17700 events. 11398/17700 cut-off events. For 51267/52323 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 118761 event pairs, 2509 based on Foata normal form. 1022/18066 useless extension candidates. Maximal degree in co-relation 66384. Up to 9259 conditions per place. [2023-08-03 20:26:24,910 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 154 selfloop transitions, 141 changer transitions 9/314 dead transitions. [2023-08-03 20:26:24,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 314 transitions, 2855 flow [2023-08-03 20:26:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:26:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:26:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 862 transitions. [2023-08-03 20:26:24,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906089926010245 [2023-08-03 20:26:24,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 862 transitions. [2023-08-03 20:26:24,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 862 transitions. [2023-08-03 20:26:24,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:24,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 862 transitions. [2023-08-03 20:26:24,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.14285714285714) internal successors, (862), 7 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 20:26:24,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:24,916 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:24,916 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 855 flow. Second operand 7 states and 862 transitions. [2023-08-03 20:26:24,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 314 transitions, 2855 flow [2023-08-03 20:26:25,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 314 transitions, 2631 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 20:26:25,201 INFO L231 Difference]: Finished difference. Result has 110 places, 210 transitions, 1854 flow [2023-08-03 20:26:25,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1854, PETRI_PLACES=110, PETRI_TRANSITIONS=210} [2023-08-03 20:26:25,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2023-08-03 20:26:25,202 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 210 transitions, 1854 flow [2023-08-03 20:26:25,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 20:26:25,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:25,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:25,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 20:26:25,203 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:25,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash -550653027, now seen corresponding path program 1 times [2023-08-03 20:26:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:25,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029908534] [2023-08-03 20:26:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:26:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029908534] [2023-08-03 20:26:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029908534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:25,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:25,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:26:25,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859306087] [2023-08-03 20:26:25,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:25,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:26:25,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:26:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:26:25,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:26:25,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 210 transitions, 1854 flow. Second operand has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:25,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:25,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:26:25,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:27,875 INFO L124 PetriNetUnfolderBase]: 14795/23245 cut-off events. [2023-08-03 20:26:27,875 INFO L125 PetriNetUnfolderBase]: For 86297/88612 co-relation queries the response was YES. [2023-08-03 20:26:27,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98472 conditions, 23245 events. 14795/23245 cut-off events. For 86297/88612 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 164899 event pairs, 2885 based on Foata normal form. 2154/24335 useless extension candidates. Maximal degree in co-relation 95789. Up to 10581 conditions per place. [2023-08-03 20:26:28,053 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 174 selfloop transitions, 181 changer transitions 12/380 dead transitions. [2023-08-03 20:26:28,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 380 transitions, 3816 flow [2023-08-03 20:26:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:26:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:26:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 870 transitions. [2023-08-03 20:26:28,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49516220830961866 [2023-08-03 20:26:28,059 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 870 transitions. [2023-08-03 20:26:28,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 870 transitions. [2023-08-03 20:26:28,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:28,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 870 transitions. [2023-08-03 20:26:28,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:28,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:28,063 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:28,064 INFO L175 Difference]: Start difference. First operand has 110 places, 210 transitions, 1854 flow. Second operand 7 states and 870 transitions. [2023-08-03 20:26:28,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 380 transitions, 3816 flow [2023-08-03 20:26:28,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 380 transitions, 3637 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 20:26:28,509 INFO L231 Difference]: Finished difference. Result has 118 places, 256 transitions, 2607 flow [2023-08-03 20:26:28,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2607, PETRI_PLACES=118, PETRI_TRANSITIONS=256} [2023-08-03 20:26:28,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2023-08-03 20:26:28,510 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 256 transitions, 2607 flow [2023-08-03 20:26:28,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:28,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:28,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:28,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 20:26:28,511 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:28,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1824886267, now seen corresponding path program 2 times [2023-08-03 20:26:28,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:28,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547263648] [2023-08-03 20:26:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:28,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:26:28,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:28,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547263648] [2023-08-03 20:26:28,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547263648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:28,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:28,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:26:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591420935] [2023-08-03 20:26:28,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:28,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:26:28,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:26:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:26:28,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:26:28,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 256 transitions, 2607 flow. Second operand has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:28,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:28,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:26:28,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:32,313 INFO L124 PetriNetUnfolderBase]: 17551/28667 cut-off events. [2023-08-03 20:26:32,314 INFO L125 PetriNetUnfolderBase]: For 147289/149875 co-relation queries the response was YES. [2023-08-03 20:26:32,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129985 conditions, 28667 events. 17551/28667 cut-off events. For 147289/149875 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 223711 event pairs, 4346 based on Foata normal form. 2549/30162 useless extension candidates. Maximal degree in co-relation 127140. Up to 11186 conditions per place. [2023-08-03 20:26:32,484 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 161 selfloop transitions, 269 changer transitions 13/454 dead transitions. [2023-08-03 20:26:32,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 454 transitions, 5248 flow [2023-08-03 20:26:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:26:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:26:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 864 transitions. [2023-08-03 20:26:32,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491747296528173 [2023-08-03 20:26:32,486 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 864 transitions. [2023-08-03 20:26:32,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 864 transitions. [2023-08-03 20:26:32,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:32,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 864 transitions. [2023-08-03 20:26:32,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.42857142857143) internal successors, (864), 7 states have internal predecessors, (864), 0 states have call successors, (0), 0 states 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 20:26:32,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:32,490 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:32,490 INFO L175 Difference]: Start difference. First operand has 118 places, 256 transitions, 2607 flow. Second operand 7 states and 864 transitions. [2023-08-03 20:26:32,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 454 transitions, 5248 flow [2023-08-03 20:26:32,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 454 transitions, 4883 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:26:32,886 INFO L231 Difference]: Finished difference. Result has 125 places, 343 transitions, 4074 flow [2023-08-03 20:26:32,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4074, PETRI_PLACES=125, PETRI_TRANSITIONS=343} [2023-08-03 20:26:32,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2023-08-03 20:26:32,886 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 343 transitions, 4074 flow [2023-08-03 20:26:32,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:32,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:32,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:32,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-03 20:26:32,887 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:32,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1424939495, now seen corresponding path program 2 times [2023-08-03 20:26:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:32,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281694211] [2023-08-03 20:26:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:32,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 20:26:33,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281694211] [2023-08-03 20:26:33,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281694211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:26:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20307133] [2023-08-03 20:26:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:26:33,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:33,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:26:33,393 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:26:33,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 20:26:33,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:26:33,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:26:33,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-03 20:26:33,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:26:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:26:33,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:26:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:26:34,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20307133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:26:34,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:26:34,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2023-08-03 20:26:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366897285] [2023-08-03 20:26:34,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:26:34,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-03 20:26:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-03 20:26:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-08-03 20:26:34,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 251 [2023-08-03 20:26:34,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 343 transitions, 4074 flow. Second operand has 21 states, 21 states have (on average 87.61904761904762) internal successors, (1840), 21 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 20:26:34,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:34,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 251 [2023-08-03 20:26:34,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:41,772 INFO L124 PetriNetUnfolderBase]: 24947/41696 cut-off events. [2023-08-03 20:26:41,772 INFO L125 PetriNetUnfolderBase]: For 286076/296084 co-relation queries the response was YES. [2023-08-03 20:26:42,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204920 conditions, 41696 events. 24947/41696 cut-off events. For 286076/296084 co-relation queries the response was YES. Maximal size of possible extension queue 1606. Compared 347593 event pairs, 4408 based on Foata normal form. 5742/45812 useless extension candidates. Maximal degree in co-relation 201653. Up to 10502 conditions per place. [2023-08-03 20:26:42,124 INFO L140 encePairwiseOnDemand]: 231/251 looper letters, 449 selfloop transitions, 1380 changer transitions 68/1910 dead transitions. [2023-08-03 20:26:42,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1910 transitions, 26538 flow [2023-08-03 20:26:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-03 20:26:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-03 20:26:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3881 transitions. [2023-08-03 20:26:42,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36814646177195975 [2023-08-03 20:26:42,133 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3881 transitions. [2023-08-03 20:26:42,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3881 transitions. [2023-08-03 20:26:42,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:42,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3881 transitions. [2023-08-03 20:26:42,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 92.4047619047619) internal successors, (3881), 42 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states 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 20:26:42,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 251.0) internal successors, (10793), 43 states have internal predecessors, (10793), 0 states have call successors, (0), 0 states 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 20:26:42,154 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 251.0) internal successors, (10793), 43 states have internal predecessors, (10793), 0 states have call successors, (0), 0 states 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 20:26:42,154 INFO L175 Difference]: Start difference. First operand has 125 places, 343 transitions, 4074 flow. Second operand 42 states and 3881 transitions. [2023-08-03 20:26:42,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1910 transitions, 26538 flow [2023-08-03 20:26:43,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 1910 transitions, 24895 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-03 20:26:43,298 INFO L231 Difference]: Finished difference. Result has 185 places, 1460 transitions, 21600 flow [2023-08-03 20:26:43,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=21600, PETRI_PLACES=185, PETRI_TRANSITIONS=1460} [2023-08-03 20:26:43,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2023-08-03 20:26:43,299 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 1460 transitions, 21600 flow [2023-08-03 20:26:43,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 87.61904761904762) internal successors, (1840), 21 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 20:26:43,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:26:43,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:26:43,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 20:26:43,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:26:43,500 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:26:43,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:26:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1479972141, now seen corresponding path program 1 times [2023-08-03 20:26:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:26:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098122232] [2023-08-03 20:26:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:26:43,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:26:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:26:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:26:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:26:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098122232] [2023-08-03 20:26:43,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098122232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:26:43,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:26:43,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:26:43,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036258769] [2023-08-03 20:26:43,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:26:43,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:26:43,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:26:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:26:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:26:43,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:26:43,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 1460 transitions, 21600 flow. Second operand has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:26:43,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:26:43,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:26:43,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:57,369 INFO L124 PetriNetUnfolderBase]: 36293/63269 cut-off events. [2023-08-03 20:26:57,369 INFO L125 PetriNetUnfolderBase]: For 605410/607970 co-relation queries the response was YES. [2023-08-03 20:26:57,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361736 conditions, 63269 events. 36293/63269 cut-off events. For 605410/607970 co-relation queries the response was YES. Maximal size of possible extension queue 2444. Compared 593363 event pairs, 7898 based on Foata normal form. 2519/64109 useless extension candidates. Maximal degree in co-relation 359344. Up to 17104 conditions per place. [2023-08-03 20:26:58,118 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 295 selfloop transitions, 2050 changer transitions 23/2398 dead transitions. [2023-08-03 20:26:58,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 2398 transitions, 39493 flow [2023-08-03 20:26:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:26:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:26:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2023-08-03 20:26:58,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968696642003415 [2023-08-03 20:26:58,120 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2023-08-03 20:26:58,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2023-08-03 20:26:58,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:58,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2023-08-03 20:26:58,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 0 states have call successors, (0), 0 states 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 20:26:58,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:58,124 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:26:58,124 INFO L175 Difference]: Start difference. First operand has 185 places, 1460 transitions, 21600 flow. Second operand 7 states and 873 transitions. [2023-08-03 20:26:58,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 2398 transitions, 39493 flow [2023-08-03 20:27:04,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 2398 transitions, 39053 flow, removed 91 selfloop flow, removed 8 redundant places. [2023-08-03 20:27:04,244 INFO L231 Difference]: Finished difference. Result has 187 places, 2199 transitions, 38755 flow [2023-08-03 20:27:04,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=21346, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38755, PETRI_PLACES=187, PETRI_TRANSITIONS=2199} [2023-08-03 20:27:04,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2023-08-03 20:27:04,246 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 2199 transitions, 38755 flow [2023-08-03 20:27:04,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:27:04,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:04,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:27:04,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-03 20:27:04,246 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:04,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 576682263, now seen corresponding path program 3 times [2023-08-03 20:27:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:04,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425868040] [2023-08-03 20:27:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:04,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:27:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425868040] [2023-08-03 20:27:04,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425868040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:04,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:04,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:04,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568391209] [2023-08-03 20:27:04,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:04,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:27:04,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:04,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:27:04,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:27:04,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:27:04,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 2199 transitions, 38755 flow. Second operand has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 20:27:04,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:04,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:27:04,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:23,971 INFO L124 PetriNetUnfolderBase]: 39361/70101 cut-off events. [2023-08-03 20:27:23,971 INFO L125 PetriNetUnfolderBase]: For 800723/804613 co-relation queries the response was YES. [2023-08-03 20:27:24,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419800 conditions, 70101 events. 39361/70101 cut-off events. For 800723/804613 co-relation queries the response was YES. Maximal size of possible extension queue 2690. Compared 685647 event pairs, 9706 based on Foata normal form. 2514/71143 useless extension candidates. Maximal degree in co-relation 417398. Up to 24093 conditions per place. [2023-08-03 20:27:24,862 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 354 selfloop transitions, 2109 changer transitions 32/2533 dead transitions. [2023-08-03 20:27:24,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 2533 transitions, 47419 flow [2023-08-03 20:27:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:27:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:27:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 870 transitions. [2023-08-03 20:27:24,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49516220830961866 [2023-08-03 20:27:24,864 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 870 transitions. [2023-08-03 20:27:24,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 870 transitions. [2023-08-03 20:27:24,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:24,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 870 transitions. [2023-08-03 20:27:24,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:27:24,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:27:24,867 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:27:24,867 INFO L175 Difference]: Start difference. First operand has 187 places, 2199 transitions, 38755 flow. Second operand 7 states and 870 transitions. [2023-08-03 20:27:24,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 2533 transitions, 47419 flow [2023-08-03 20:27:31,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 2533 transitions, 45174 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-03 20:27:31,427 INFO L231 Difference]: Finished difference. Result has 195 places, 2274 transitions, 44085 flow [2023-08-03 20:27:31,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=36584, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2034, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=44085, PETRI_PLACES=195, PETRI_TRANSITIONS=2274} [2023-08-03 20:27:31,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2023-08-03 20:27:31,429 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 2274 transitions, 44085 flow [2023-08-03 20:27:31,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 20:27:31,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:31,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:27:31,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-03 20:27:31,429 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:31,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash -994789207, now seen corresponding path program 5 times [2023-08-03 20:27:31,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:31,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153307167] [2023-08-03 20:27:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:31,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:27:31,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153307167] [2023-08-03 20:27:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153307167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:31,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:31,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:31,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205293653] [2023-08-03 20:27:31,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:31,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:27:31,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:31,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:27:31,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:27:31,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:27:31,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 2274 transitions, 44085 flow. Second operand has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:27:31,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:31,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:27:31,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:07,662 INFO L124 PetriNetUnfolderBase]: 57407/106721 cut-off events. [2023-08-03 20:28:07,662 INFO L125 PetriNetUnfolderBase]: For 1385430/1395612 co-relation queries the response was YES. [2023-08-03 20:28:08,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664146 conditions, 106721 events. 57407/106721 cut-off events. For 1385430/1395612 co-relation queries the response was YES. Maximal size of possible extension queue 4314. Compared 1160223 event pairs, 12665 based on Foata normal form. 7930/112589 useless extension candidates. Maximal degree in co-relation 660870. Up to 27712 conditions per place. [2023-08-03 20:28:09,168 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 369 selfloop transitions, 3279 changer transitions 20/3704 dead transitions. [2023-08-03 20:28:09,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 3704 transitions, 78009 flow [2023-08-03 20:28:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:28:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:28:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 871 transitions. [2023-08-03 20:28:09,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957313602731929 [2023-08-03 20:28:09,170 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 871 transitions. [2023-08-03 20:28:09,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 871 transitions. [2023-08-03 20:28:09,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:09,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 871 transitions. [2023-08-03 20:28:09,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.42857142857143) internal successors, (871), 7 states have internal predecessors, (871), 0 states have call successors, (0), 0 states 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 20:28:09,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:28:09,173 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:28:09,173 INFO L175 Difference]: Start difference. First operand has 195 places, 2274 transitions, 44085 flow. Second operand 7 states and 871 transitions. [2023-08-03 20:28:09,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 3704 transitions, 78009 flow [2023-08-03 20:28:27,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 3704 transitions, 74612 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-03 20:28:27,196 INFO L231 Difference]: Finished difference. Result has 203 places, 3448 transitions, 74470 flow [2023-08-03 20:28:27,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=41918, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=74470, PETRI_PLACES=203, PETRI_TRANSITIONS=3448} [2023-08-03 20:28:27,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2023-08-03 20:28:27,199 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 3448 transitions, 74470 flow [2023-08-03 20:28:27,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.14285714285714) internal successors, (750), 7 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:28:27,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:27,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:28:27,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-03 20:28:27,199 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:27,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1892087639, now seen corresponding path program 6 times [2023-08-03 20:28:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:27,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059911563] [2023-08-03 20:28:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:28:27,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:27,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059911563] [2023-08-03 20:28:27,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059911563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:28:27,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:28:27,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:28:27,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097679895] [2023-08-03 20:28:27,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:28:27,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:28:27,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:28:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:28:27,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:28:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 3448 transitions, 74470 flow. Second operand has 7 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 20:28:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:28:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:29:16,720 INFO L124 PetriNetUnfolderBase]: 56739/103779 cut-off events. [2023-08-03 20:29:16,720 INFO L125 PetriNetUnfolderBase]: For 1597035/1601807 co-relation queries the response was YES. [2023-08-03 20:29:17,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688965 conditions, 103779 events. 56739/103779 cut-off events. For 1597035/1601807 co-relation queries the response was YES. Maximal size of possible extension queue 4120. Compared 1101363 event pairs, 13727 based on Foata normal form. 2834/104611 useless extension candidates. Maximal degree in co-relation 685958. Up to 38095 conditions per place. [2023-08-03 20:29:18,161 INFO L140 encePairwiseOnDemand]: 243/251 looper letters, 371 selfloop transitions, 3279 changer transitions 43/3731 dead transitions. [2023-08-03 20:29:18,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 3731 transitions, 84726 flow [2023-08-03 20:29:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:29:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:29:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 867 transitions. [2023-08-03 20:29:18,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49345475241889586 [2023-08-03 20:29:18,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 867 transitions. [2023-08-03 20:29:18,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 867 transitions. [2023-08-03 20:29:18,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:29:18,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 867 transitions. [2023-08-03 20:29:18,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.85714285714286) internal successors, (867), 7 states have internal predecessors, (867), 0 states have call successors, (0), 0 states 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 20:29:18,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:29:18,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 251.0) internal successors, (2008), 8 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 20:29:18,165 INFO L175 Difference]: Start difference. First operand has 203 places, 3448 transitions, 74470 flow. Second operand 7 states and 867 transitions. [2023-08-03 20:29:18,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 3731 transitions, 84726 flow [2023-08-03 20:29:34,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 3731 transitions, 81343 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-03 20:29:34,576 INFO L231 Difference]: Finished difference. Result has 210 places, 3454 transitions, 79056 flow [2023-08-03 20:29:34,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=71099, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=79056, PETRI_PLACES=210, PETRI_TRANSITIONS=3454} [2023-08-03 20:29:34,579 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2023-08-03 20:29:34,579 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 3454 transitions, 79056 flow [2023-08-03 20:29:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 20:29:34,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:29:34,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:29:34,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-03 20:29:34,584 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:29:34,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:29:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash 563150093, now seen corresponding path program 7 times [2023-08-03 20:29:34,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:29:34,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833062721] [2023-08-03 20:29:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:29:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:29:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:29:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:29:34,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:29:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833062721] [2023-08-03 20:29:34,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833062721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:29:34,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:29:34,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:29:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091937610] [2023-08-03 20:29:34,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:29:34,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 20:29:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:29:34,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 20:29:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:29:34,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-03 20:29:34,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 3454 transitions, 79056 flow. Second operand has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 20:29:34,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:29:34,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-03 20:29:34,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand