/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/goblint-regression_13-privatized_25-struct_nr_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:01:01,514 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:01:01,575 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:01:01,578 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:01:01,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:01:01,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:01:01,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:01:01,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:01:01,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:01:01,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:01:01,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:01:01,605 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:01:01,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:01:01,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:01:01,606 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:01:01,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:01:01,607 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:01:01,607 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:01:01,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:01:01,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:01:01,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:01:01,610 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:01:01,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:01:01,610 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:01:01,614 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:01:01,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:01:01,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:01:01,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:01:01,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:01:01,615 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:01:01,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:01:01,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:01:01,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:01:01,616 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:01:01,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:01:01,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:01:01,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:01:01,616 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:01:01,617 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:01:01,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:01:01,617 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:01:01,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:01:01,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:01:01,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:01:01,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:01:01,823 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:01:01,823 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:01:01,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_25-struct_nr_true_bound2.i [2023-08-03 16:01:02,834 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:01:03,010 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:01:03,011 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_25-struct_nr_true_bound2.i [2023-08-03 16:01:03,020 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf8f21ee/39faa9420ff84d9b97c27004101f84e1/FLAGe0e82a542 [2023-08-03 16:01:03,034 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf8f21ee/39faa9420ff84d9b97c27004101f84e1 [2023-08-03 16:01:03,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:01:03,036 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:01:03,037 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:01:03,037 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:01:03,039 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:01:03,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f063844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03, skipping insertion in model container [2023-08-03 16:01:03,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,066 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:01:03,157 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_25-struct_nr_true_bound2.i[1086,1099] [2023-08-03 16:01:03,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:01:03,255 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:01:03,265 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_25-struct_nr_true_bound2.i[1086,1099] [2023-08-03 16:01:03,280 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 16:01:03,281 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 16:01:03,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:01:03,335 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:01:03,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03 WrapperNode [2023-08-03 16:01:03,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:01:03,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:01:03,336 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:01:03,336 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:01:03,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,354 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,367 INFO L138 Inliner]: procedures = 162, calls = 24, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 92 [2023-08-03 16:01:03,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:01:03,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:01:03,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:01:03,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:01:03,375 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,382 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,395 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:01:03,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:01:03,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:01:03,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:01:03,396 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (1/1) ... [2023-08-03 16:01:03,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:01:03,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:01:03,438 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 16:01:03,465 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 16:01:03,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 16:01:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:01:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 16:01:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:01:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:01:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 16:01:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 16:01:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:01:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:01:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:01:03,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:01:03,481 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 16:01:03,596 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:01:03,597 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:01:03,772 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:01:03,777 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:01:03,777 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 16:01:03,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:01:03 BoogieIcfgContainer [2023-08-03 16:01:03,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:01:03,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:01:03,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:01:03,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:01:03,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:01:03" (1/3) ... [2023-08-03 16:01:03,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3623889f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:01:03, skipping insertion in model container [2023-08-03 16:01:03,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:01:03" (2/3) ... [2023-08-03 16:01:03,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3623889f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:01:03, skipping insertion in model container [2023-08-03 16:01:03,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:01:03" (3/3) ... [2023-08-03 16:01:03,784 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_25-struct_nr_true_bound2.i [2023-08-03 16:01:03,788 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:01:03,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:01:03,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-03 16:01:03,794 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:01:03,834 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 16:01:03,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 98 transitions, 204 flow [2023-08-03 16:01:03,948 INFO L124 PetriNetUnfolderBase]: 10/131 cut-off events. [2023-08-03 16:01:03,948 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 16:01:03,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 131 events. 10/131 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 252 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-03 16:01:03,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 98 transitions, 204 flow [2023-08-03 16:01:03,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 93 transitions, 191 flow [2023-08-03 16:01:03,958 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:01:03,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 93 transitions, 191 flow [2023-08-03 16:01:03,965 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 93 transitions, 191 flow [2023-08-03 16:01:03,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 93 transitions, 191 flow [2023-08-03 16:01:03,981 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-08-03 16:01:03,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:01:03,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 126 events. 9/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 248 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-03 16:01:03,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-03 16:01:05,793 INFO L134 LiptonReduction]: Checked pairs total: 4165 [2023-08-03 16:01:05,793 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 16:01:05,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:01:05,809 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;@3647cb4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:01:05,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 16:01:05,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:01:05,811 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-03 16:01:05,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:01:05,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:05,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 16:01:05,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:01:05,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:05,818 INFO L85 PathProgramCache]: Analyzing trace with hash 382, now seen corresponding path program 1 times [2023-08-03 16:01:05,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:05,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440359820] [2023-08-03 16:01:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:05,908 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 16:01:05,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:05,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440359820] [2023-08-03 16:01:05,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440359820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:05,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 16:01:05,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526639377] [2023-08-03 16:01:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:05,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 16:01:05,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 16:01:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 16:01:05,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 187 [2023-08-03 16:01:05,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 61 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:05,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:05,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 187 [2023-08-03 16:01:05,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:06,027 INFO L124 PetriNetUnfolderBase]: 90/223 cut-off events. [2023-08-03 16:01:06,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:01:06,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 223 events. 90/223 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 860 event pairs, 90 based on Foata normal form. 11/179 useless extension candidates. Maximal degree in co-relation 409. Up to 211 conditions per place. [2023-08-03 16:01:06,030 INFO L140 encePairwiseOnDemand]: 183/187 looper letters, 21 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-08-03 16:01:06,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 93 flow [2023-08-03 16:01:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 16:01:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 16:01:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2023-08-03 16:01:06,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267379679144385 [2023-08-03 16:01:06,047 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2023-08-03 16:01:06,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2023-08-03 16:01:06,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:06,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2023-08-03 16:01:06,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,061 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,062 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 61 flow. Second operand 2 states and 197 transitions. [2023-08-03 16:01:06,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 93 flow [2023-08-03 16:01:06,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:01:06,066 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 51 flow [2023-08-03 16:01:06,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-03 16:01:06,070 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-03 16:01:06,070 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 51 flow [2023-08-03 16:01:06,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:06,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 16:01:06,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:01:06,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:01:06,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash 361247208, now seen corresponding path program 1 times [2023-08-03 16:01:06,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:06,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675677085] [2023-08-03 16:01:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:06,198 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 16:01:06,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:06,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675677085] [2023-08-03 16:01:06,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675677085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:06,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:06,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:01:06,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258821590] [2023-08-03 16:01:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:06,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:01:06,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:01:06,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:01:06,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 187 [2023-08-03 16:01:06,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:06,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 187 [2023-08-03 16:01:06,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:06,275 INFO L124 PetriNetUnfolderBase]: 90/213 cut-off events. [2023-08-03 16:01:06,275 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:01:06,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 213 events. 90/213 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 873 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 427. Up to 191 conditions per place. [2023-08-03 16:01:06,280 INFO L140 encePairwiseOnDemand]: 184/187 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-03 16:01:06,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 133 flow [2023-08-03 16:01:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:01:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:01:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-03 16:01:06,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49554367201426025 [2023-08-03 16:01:06,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-03 16:01:06,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-03 16:01:06,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:06,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-03 16:01:06,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 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 16:01:06,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 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 16:01:06,291 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 51 flow. Second operand 3 states and 278 transitions. [2023-08-03 16:01:06,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 133 flow [2023-08-03 16:01:06,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:01:06,293 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 59 flow [2023-08-03 16:01:06,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-03 16:01:06,295 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-03 16:01:06,297 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 59 flow [2023-08-03 16:01:06,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 16:01:06,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 16:01:06,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:01:06,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:06,302 INFO L85 PathProgramCache]: Analyzing trace with hash 361953861, now seen corresponding path program 1 times [2023-08-03 16:01:06,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:06,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990568951] [2023-08-03 16:01:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:06,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:06,470 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 16:01:06,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:06,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990568951] [2023-08-03 16:01:06,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990568951] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:06,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:06,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:01:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996484478] [2023-08-03 16:01:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:01:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:01:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:01:06,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 187 [2023-08-03 16:01:06,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:06,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 187 [2023-08-03 16:01:06,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:06,532 INFO L124 PetriNetUnfolderBase]: 85/198 cut-off events. [2023-08-03 16:01:06,533 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-03 16:01:06,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 198 events. 85/198 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 725 event pairs, 43 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 421. Up to 168 conditions per place. [2023-08-03 16:01:06,535 INFO L140 encePairwiseOnDemand]: 183/187 looper letters, 26 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-03 16:01:06,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 138 flow [2023-08-03 16:01:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:01:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:01:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2023-08-03 16:01:06,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48663101604278075 [2023-08-03 16:01:06,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2023-08-03 16:01:06,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2023-08-03 16:01:06,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:06,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2023-08-03 16:01:06,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 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 16:01:06,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 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 16:01:06,539 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 59 flow. Second operand 3 states and 273 transitions. [2023-08-03 16:01:06,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 138 flow [2023-08-03 16:01:06,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 16:01:06,541 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 74 flow [2023-08-03 16:01:06,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-08-03 16:01:06,542 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 16:01:06,542 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 74 flow [2023-08-03 16:01:06,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:06,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:06,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:01:06,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 16:01:06,543 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:01:06,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1664328434, now seen corresponding path program 1 times [2023-08-03 16:01:06,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:06,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241603944] [2023-08-03 16:01:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:06,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:01:06,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:01:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:01:06,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:01:06,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:01:06,611 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-03 16:01:06,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-03 16:01:06,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-03 16:01:06,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-03 16:01:06,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-03 16:01:06,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-03 16:01:06,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-03 16:01:06,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 16:01:06,617 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 16:01:06,619 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:01:06,620 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:01:06,646 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 16:01:06,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 126 transitions, 270 flow [2023-08-03 16:01:06,673 INFO L124 PetriNetUnfolderBase]: 18/216 cut-off events. [2023-08-03 16:01:06,673 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 16:01:06,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 216 events. 18/216 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 578 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-03 16:01:06,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 126 transitions, 270 flow [2023-08-03 16:01:06,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 126 transitions, 270 flow [2023-08-03 16:01:06,675 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:01:06,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 126 transitions, 270 flow [2023-08-03 16:01:06,676 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 126 transitions, 270 flow [2023-08-03 16:01:06,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 126 transitions, 270 flow [2023-08-03 16:01:06,690 INFO L124 PetriNetUnfolderBase]: 18/216 cut-off events. [2023-08-03 16:01:06,690 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 16:01:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 216 events. 18/216 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 578 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-03 16:01:06,693 INFO L119 LiptonReduction]: Number of co-enabled transitions 5980 [2023-08-03 16:01:08,267 INFO L134 LiptonReduction]: Checked pairs total: 13001 [2023-08-03 16:01:08,268 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-03 16:01:08,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:01:08,280 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;@3647cb4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:01:08,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-03 16:01:08,284 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:01:08,284 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-03 16:01:08,284 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:01:08,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:08,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 16:01:08,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:08,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash 654, now seen corresponding path program 1 times [2023-08-03 16:01:08,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:08,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434926399] [2023-08-03 16:01:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:08,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:08,312 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 16:01:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:08,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434926399] [2023-08-03 16:01:08,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434926399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:08,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:08,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 16:01:08,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588975725] [2023-08-03 16:01:08,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:08,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 16:01:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 16:01:08,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 16:01:08,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 245 [2023-08-03 16:01:08,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:08,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 245 [2023-08-03 16:01:08,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:08,465 INFO L124 PetriNetUnfolderBase]: 1731/2994 cut-off events. [2023-08-03 16:01:08,465 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-03 16:01:08,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 2994 events. 1731/2994 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16620 event pairs, 1720 based on Foata normal form. 118/2261 useless extension candidates. Maximal degree in co-relation 2309. Up to 2839 conditions per place. [2023-08-03 16:01:08,475 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 33 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-08-03 16:01:08,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 160 flow [2023-08-03 16:01:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 16:01:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 16:01:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 253 transitions. [2023-08-03 16:01:08,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163265306122449 [2023-08-03 16:01:08,476 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 253 transitions. [2023-08-03 16:01:08,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 253 transitions. [2023-08-03 16:01:08,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:08,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 253 transitions. [2023-08-03 16:01:08,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,478 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,478 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 106 flow. Second operand 2 states and 253 transitions. [2023-08-03 16:01:08,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 160 flow [2023-08-03 16:01:08,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:01:08,479 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 94 flow [2023-08-03 16:01:08,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-03 16:01:08,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2023-08-03 16:01:08,480 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 94 flow [2023-08-03 16:01:08,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:08,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 16:01:08,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 16:01:08,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:08,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 622172955, now seen corresponding path program 1 times [2023-08-03 16:01:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718940602] [2023-08-03 16:01:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:08,511 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 16:01:08,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718940602] [2023-08-03 16:01:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718940602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:08,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:01:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195944126] [2023-08-03 16:01:08,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:08,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:01:08,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:01:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:01:08,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 245 [2023-08-03 16:01:08,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:08,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 245 [2023-08-03 16:01:08,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:08,732 INFO L124 PetriNetUnfolderBase]: 1730/2949 cut-off events. [2023-08-03 16:01:08,733 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-03 16:01:08,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5850 conditions, 2949 events. 1730/2949 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 16365 event pairs, 784 based on Foata normal form. 0/2092 useless extension candidates. Maximal degree in co-relation 5845. Up to 2820 conditions per place. [2023-08-03 16:01:08,744 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 41 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-03 16:01:08,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 200 flow [2023-08-03 16:01:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:01:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:01:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-03 16:01:08,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48435374149659866 [2023-08-03 16:01:08,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-03 16:01:08,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-03 16:01:08,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:08,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-03 16:01:08,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,750 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 94 flow. Second operand 3 states and 356 transitions. [2023-08-03 16:01:08,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 200 flow [2023-08-03 16:01:08,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:01:08,752 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 106 flow [2023-08-03 16:01:08,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-03 16:01:08,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-03 16:01:08,755 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 106 flow [2023-08-03 16:01:08,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:08,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 16:01:08,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 16:01:08,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:08,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash 622775734, now seen corresponding path program 1 times [2023-08-03 16:01:08,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:08,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314466791] [2023-08-03 16:01:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:08,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:08,825 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 16:01:08,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:08,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314466791] [2023-08-03 16:01:08,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314466791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:08,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:08,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:01:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846368535] [2023-08-03 16:01:08,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:08,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:01:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:01:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:01:08,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 245 [2023-08-03 16:01:08,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:08,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:08,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 245 [2023-08-03 16:01:08,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:09,025 INFO L124 PetriNetUnfolderBase]: 1958/3330 cut-off events. [2023-08-03 16:01:09,025 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2023-08-03 16:01:09,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6765 conditions, 3330 events. 1958/3330 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18644 event pairs, 1049 based on Foata normal form. 0/2553 useless extension candidates. Maximal degree in co-relation 6758. Up to 2874 conditions per place. [2023-08-03 16:01:09,038 INFO L140 encePairwiseOnDemand]: 235/245 looper letters, 53 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2023-08-03 16:01:09,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 291 flow [2023-08-03 16:01:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:01:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:01:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-03 16:01:09,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-03 16:01:09,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-03 16:01:09,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-03 16:01:09,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:09,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-03 16:01:09,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,043 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 106 flow. Second operand 3 states and 364 transitions. [2023-08-03 16:01:09,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 291 flow [2023-08-03 16:01:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:01:09,046 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 162 flow [2023-08-03 16:01:09,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-08-03 16:01:09,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-03 16:01:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 162 flow [2023-08-03 16:01:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:09,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 16:01:09,049 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:09,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1146903967, now seen corresponding path program 1 times [2023-08-03 16:01:09,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:09,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570579000] [2023-08-03 16:01:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:09,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:09,095 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 16:01:09,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:09,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570579000] [2023-08-03 16:01:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570579000] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:09,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:01:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909280954] [2023-08-03 16:01:09,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:09,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 16:01:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 16:01:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 16:01:09,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 245 [2023-08-03 16:01:09,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:09,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 245 [2023-08-03 16:01:09,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:09,415 INFO L124 PetriNetUnfolderBase]: 2546/4320 cut-off events. [2023-08-03 16:01:09,416 INFO L125 PetriNetUnfolderBase]: For 1098/1098 co-relation queries the response was YES. [2023-08-03 16:01:09,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10241 conditions, 4320 events. 2546/4320 cut-off events. For 1098/1098 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26425 event pairs, 822 based on Foata normal form. 26/3839 useless extension candidates. Maximal degree in co-relation 10233. Up to 1612 conditions per place. [2023-08-03 16:01:09,433 INFO L140 encePairwiseOnDemand]: 236/245 looper letters, 95 selfloop transitions, 18 changer transitions 1/118 dead transitions. [2023-08-03 16:01:09,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 118 transitions, 611 flow [2023-08-03 16:01:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:01:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:01:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-03 16:01:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906122448979592 [2023-08-03 16:01:09,437 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-03 16:01:09,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-03 16:01:09,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:09,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-03 16:01:09,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,442 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 162 flow. Second operand 5 states and 601 transitions. [2023-08-03 16:01:09,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 118 transitions, 611 flow [2023-08-03 16:01:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 118 transitions, 593 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 16:01:09,449 INFO L231 Difference]: Finished difference. Result has 53 places, 59 transitions, 283 flow [2023-08-03 16:01:09,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=53, PETRI_TRANSITIONS=59} [2023-08-03 16:01:09,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2023-08-03 16:01:09,450 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 59 transitions, 283 flow [2023-08-03 16:01:09,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:09,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:09,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 16:01:09,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:09,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1521285088, now seen corresponding path program 1 times [2023-08-03 16:01:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135260157] [2023-08-03 16:01:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:09,476 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 16:01:09,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135260157] [2023-08-03 16:01:09,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135260157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:01:09,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438964170] [2023-08-03 16:01:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:09,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:09,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:01:09,479 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 16:01:09,480 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 16:01:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:09,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:01:09,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:01:09,567 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 16:01:09,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:01:09,582 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 16:01:09,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438964170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:01:09,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:01:09,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 16:01:09,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041455546] [2023-08-03 16:01:09,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:01:09,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:01:09,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:09,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:01:09,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:01:09,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 245 [2023-08-03 16:01:09,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:09,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 245 [2023-08-03 16:01:09,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:09,819 INFO L124 PetriNetUnfolderBase]: 2321/3928 cut-off events. [2023-08-03 16:01:09,819 INFO L125 PetriNetUnfolderBase]: For 3994/4099 co-relation queries the response was YES. [2023-08-03 16:01:09,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11229 conditions, 3928 events. 2321/3928 cut-off events. For 3994/4099 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23815 event pairs, 683 based on Foata normal form. 85/3616 useless extension candidates. Maximal degree in co-relation 11218. Up to 3418 conditions per place. [2023-08-03 16:01:09,838 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 79 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-03 16:01:09,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 594 flow [2023-08-03 16:01:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 16:01:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 16:01:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-03 16:01:09,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-08-03 16:01:09,840 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-03 16:01:09,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-03 16:01:09,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:09,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-03 16:01:09,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,842 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 283 flow. Second operand 4 states and 469 transitions. [2023-08-03 16:01:09,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 594 flow [2023-08-03 16:01:09,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 594 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:01:09,847 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 303 flow [2023-08-03 16:01:09,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-03 16:01:09,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2023-08-03 16:01:09,848 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 303 flow [2023-08-03 16:01:09,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:09,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:09,848 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 16:01:09,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 16:01:10,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:10,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:10,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:10,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1090706200, now seen corresponding path program 1 times [2023-08-03 16:01:10,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:10,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092745100] [2023-08-03 16:01:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:10,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:10,133 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 16:01:10,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:10,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092745100] [2023-08-03 16:01:10,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092745100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:01:10,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536551433] [2023-08-03 16:01:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:10,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:10,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:01:10,135 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 16:01:10,145 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 16:01:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:10,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:01:10,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:01:10,223 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 16:01:10,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:01:10,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536551433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:10,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:01:10,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 16:01:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358555780] [2023-08-03 16:01:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:10,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:01:10,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:01:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:01:10,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 245 [2023-08-03 16:01:10,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:10,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 245 [2023-08-03 16:01:10,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:10,506 INFO L124 PetriNetUnfolderBase]: 2206/3726 cut-off events. [2023-08-03 16:01:10,506 INFO L125 PetriNetUnfolderBase]: For 4258/4355 co-relation queries the response was YES. [2023-08-03 16:01:10,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10937 conditions, 3726 events. 2206/3726 cut-off events. For 4258/4355 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22323 event pairs, 613 based on Foata normal form. 143/3478 useless extension candidates. Maximal degree in co-relation 10924. Up to 3417 conditions per place. [2023-08-03 16:01:10,525 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 79 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-03 16:01:10,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 88 transitions, 600 flow [2023-08-03 16:01:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:01:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:01:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-03 16:01:10,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661224489795918 [2023-08-03 16:01:10,526 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-03 16:01:10,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-03 16:01:10,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:10,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-03 16:01:10,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,529 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 303 flow. Second operand 5 states and 571 transitions. [2023-08-03 16:01:10,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 88 transitions, 600 flow [2023-08-03 16:01:10,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 590 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-03 16:01:10,534 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 287 flow [2023-08-03 16:01:10,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-03 16:01:10,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2023-08-03 16:01:10,535 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 287 flow [2023-08-03 16:01:10,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:10,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:10,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 16:01:10,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 16:01:10,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:10,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1712791993, now seen corresponding path program 1 times [2023-08-03 16:01:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192615405] [2023-08-03 16:01:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:01:10,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:10,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192615405] [2023-08-03 16:01:10,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192615405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:10,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:10,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:01:10,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068714437] [2023-08-03 16:01:10,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:10,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:01:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:01:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:01:10,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 245 [2023-08-03 16:01:10,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:10,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 245 [2023-08-03 16:01:10,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:10,844 INFO L124 PetriNetUnfolderBase]: 158/445 cut-off events. [2023-08-03 16:01:10,844 INFO L125 PetriNetUnfolderBase]: For 487/488 co-relation queries the response was YES. [2023-08-03 16:01:10,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 445 events. 158/445 cut-off events. For 487/488 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2104 event pairs, 20 based on Foata normal form. 104/488 useless extension candidates. Maximal degree in co-relation 1233. Up to 331 conditions per place. [2023-08-03 16:01:10,845 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 40 selfloop transitions, 6 changer transitions 1/51 dead transitions. [2023-08-03 16:01:10,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 319 flow [2023-08-03 16:01:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:01:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:01:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-03 16:01:10,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707482993197279 [2023-08-03 16:01:10,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-03 16:01:10,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-03 16:01:10,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:10,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-03 16:01:10,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,848 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 287 flow. Second operand 3 states and 346 transitions. [2023-08-03 16:01:10,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 319 flow [2023-08-03 16:01:10,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 282 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-03 16:01:10,850 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 161 flow [2023-08-03 16:01:10,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-03 16:01:10,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2023-08-03 16:01:10,851 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 161 flow [2023-08-03 16:01:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:10,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:10,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 16:01:10,851 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:10,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash 687553677, now seen corresponding path program 1 times [2023-08-03 16:01:10,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:10,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955620501] [2023-08-03 16:01:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:10,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:10,879 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 16:01:10,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:10,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955620501] [2023-08-03 16:01:10,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955620501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:10,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:10,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:01:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818736540] [2023-08-03 16:01:10,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:10,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 16:01:10,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 16:01:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 16:01:10,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 245 [2023-08-03 16:01:10,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:10,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 245 [2023-08-03 16:01:10,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:10,969 INFO L124 PetriNetUnfolderBase]: 162/433 cut-off events. [2023-08-03 16:01:10,969 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-08-03 16:01:10,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 433 events. 162/433 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1878 event pairs, 69 based on Foata normal form. 14/398 useless extension candidates. Maximal degree in co-relation 1185. Up to 160 conditions per place. [2023-08-03 16:01:10,971 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 57 selfloop transitions, 9 changer transitions 4/72 dead transitions. [2023-08-03 16:01:10,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 72 transitions, 417 flow [2023-08-03 16:01:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:01:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:01:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 559 transitions. [2023-08-03 16:01:10,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563265306122449 [2023-08-03 16:01:10,972 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 559 transitions. [2023-08-03 16:01:10,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 559 transitions. [2023-08-03 16:01:10,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:10,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 559 transitions. [2023-08-03 16:01:10,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.8) internal successors, (559), 5 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,975 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,975 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 161 flow. Second operand 5 states and 559 transitions. [2023-08-03 16:01:10,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 72 transitions, 417 flow [2023-08-03 16:01:10,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 72 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:01:10,976 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 181 flow [2023-08-03 16:01:10,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-08-03 16:01:10,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2023-08-03 16:01:10,977 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 181 flow [2023-08-03 16:01:10,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:10,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:10,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:10,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 16:01:10,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:10,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -197220890, now seen corresponding path program 1 times [2023-08-03 16:01:10,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:10,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035364472] [2023-08-03 16:01:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:10,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:01:11,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:11,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035364472] [2023-08-03 16:01:11,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035364472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:11,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:11,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:01:11,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100355846] [2023-08-03 16:01:11,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:11,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:01:11,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:01:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:01:11,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 245 [2023-08-03 16:01:11,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:11,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 245 [2023-08-03 16:01:11,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:11,141 INFO L124 PetriNetUnfolderBase]: 152/419 cut-off events. [2023-08-03 16:01:11,141 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-03 16:01:11,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 419 events. 152/419 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1780 event pairs, 99 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1168. Up to 336 conditions per place. [2023-08-03 16:01:11,142 INFO L140 encePairwiseOnDemand]: 237/245 looper letters, 45 selfloop transitions, 8 changer transitions 2/58 dead transitions. [2023-08-03 16:01:11,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 344 flow [2023-08-03 16:01:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:01:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:01:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2023-08-03 16:01:11,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44081632653061226 [2023-08-03 16:01:11,144 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2023-08-03 16:01:11,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2023-08-03 16:01:11,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:11,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2023-08-03 16:01:11,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,146 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 181 flow. Second operand 5 states and 540 transitions. [2023-08-03 16:01:11,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 344 flow [2023-08-03 16:01:11,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 344 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:01:11,148 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 215 flow [2023-08-03 16:01:11,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-03 16:01:11,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2023-08-03 16:01:11,149 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 215 flow [2023-08-03 16:01:11,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:11,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:11,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 16:01:11,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:11,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1530017400, now seen corresponding path program 1 times [2023-08-03 16:01:11,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:11,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470348364] [2023-08-03 16:01:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:11,204 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 16:01:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:11,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470348364] [2023-08-03 16:01:11,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470348364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:01:11,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268068834] [2023-08-03 16:01:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:11,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:01:11,229 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 16:01:11,265 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 16:01:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:11,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-03 16:01:11,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:01:11,366 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 16:01:11,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:01:11,397 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 16:01:11,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268068834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:01:11,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:01:11,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-08-03 16:01:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56073364] [2023-08-03 16:01:11,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:01:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 16:01:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 16:01:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 16:01:11,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 245 [2023-08-03 16:01:11,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:11,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 245 [2023-08-03 16:01:11,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:11,525 INFO L124 PetriNetUnfolderBase]: 169/477 cut-off events. [2023-08-03 16:01:11,525 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2023-08-03 16:01:11,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 477 events. 169/477 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2211 event pairs, 72 based on Foata normal form. 9/432 useless extension candidates. Maximal degree in co-relation 1374. Up to 184 conditions per place. [2023-08-03 16:01:11,526 INFO L140 encePairwiseOnDemand]: 238/245 looper letters, 62 selfloop transitions, 11 changer transitions 8/84 dead transitions. [2023-08-03 16:01:11,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 533 flow [2023-08-03 16:01:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:01:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:01:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-03 16:01:11,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661224489795918 [2023-08-03 16:01:11,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-03 16:01:11,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-03 16:01:11,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:11,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-03 16:01:11,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,531 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 215 flow. Second operand 5 states and 571 transitions. [2023-08-03 16:01:11,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 533 flow [2023-08-03 16:01:11,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 533 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:01:11,533 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 253 flow [2023-08-03 16:01:11,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2023-08-03 16:01:11,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2023-08-03 16:01:11,534 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 253 flow [2023-08-03 16:01:11,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:11,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:11,547 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 16:01:11,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:11,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:11,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:11,739 INFO L85 PathProgramCache]: Analyzing trace with hash 213784725, now seen corresponding path program 1 times [2023-08-03 16:01:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:11,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552049974] [2023-08-03 16:01:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:11,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:11,811 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 16:01:11,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:11,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552049974] [2023-08-03 16:01:11,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552049974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:11,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:11,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:01:11,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220874231] [2023-08-03 16:01:11,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:11,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 16:01:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 16:01:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 16:01:11,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 245 [2023-08-03 16:01:11,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:11,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 245 [2023-08-03 16:01:11,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:11,939 INFO L124 PetriNetUnfolderBase]: 203/608 cut-off events. [2023-08-03 16:01:11,939 INFO L125 PetriNetUnfolderBase]: For 980/980 co-relation queries the response was YES. [2023-08-03 16:01:11,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1836 conditions, 608 events. 203/608 cut-off events. For 980/980 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3199 event pairs, 151 based on Foata normal form. 2/536 useless extension candidates. Maximal degree in co-relation 1821. Up to 349 conditions per place. [2023-08-03 16:01:11,940 INFO L140 encePairwiseOnDemand]: 237/245 looper letters, 66 selfloop transitions, 8 changer transitions 13/90 dead transitions. [2023-08-03 16:01:11,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 628 flow [2023-08-03 16:01:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:01:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:01:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-08-03 16:01:11,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2023-08-03 16:01:11,942 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-08-03 16:01:11,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-08-03 16:01:11,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:11,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-08-03 16:01:11,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,945 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 253 flow. Second operand 5 states and 575 transitions. [2023-08-03 16:01:11,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 628 flow [2023-08-03 16:01:11,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 596 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 16:01:11,947 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 289 flow [2023-08-03 16:01:11,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-08-03 16:01:11,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2023-08-03 16:01:11,948 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 289 flow [2023-08-03 16:01:11,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:11,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:11,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:11,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 16:01:11,949 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:11,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1581723683, now seen corresponding path program 1 times [2023-08-03 16:01:11,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:11,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033372093] [2023-08-03 16:01:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:11,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:01:12,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:12,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033372093] [2023-08-03 16:01:12,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033372093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:12,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:12,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 16:01:12,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368897700] [2023-08-03 16:01:12,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:12,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 16:01:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 16:01:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:01:12,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 245 [2023-08-03 16:01:12,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 98.33333333333333) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:12,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 245 [2023-08-03 16:01:12,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:12,187 INFO L124 PetriNetUnfolderBase]: 96/344 cut-off events. [2023-08-03 16:01:12,188 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-08-03 16:01:12,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 344 events. 96/344 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1477 event pairs, 57 based on Foata normal form. 6/316 useless extension candidates. Maximal degree in co-relation 1013. Up to 260 conditions per place. [2023-08-03 16:01:12,189 INFO L140 encePairwiseOnDemand]: 235/245 looper letters, 48 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2023-08-03 16:01:12,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 454 flow [2023-08-03 16:01:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 16:01:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 16:01:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 626 transitions. [2023-08-03 16:01:12,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42585034013605444 [2023-08-03 16:01:12,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 626 transitions. [2023-08-03 16:01:12,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 626 transitions. [2023-08-03 16:01:12,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:12,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 626 transitions. [2023-08-03 16:01:12,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.33333333333333) internal successors, (626), 6 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,193 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 245.0) internal successors, (1715), 7 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,193 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 289 flow. Second operand 6 states and 626 transitions. [2023-08-03 16:01:12,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 454 flow [2023-08-03 16:01:12,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 16:01:12,195 INFO L231 Difference]: Finished difference. Result has 74 places, 49 transitions, 319 flow [2023-08-03 16:01:12,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=74, PETRI_TRANSITIONS=49} [2023-08-03 16:01:12,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2023-08-03 16:01:12,196 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 49 transitions, 319 flow [2023-08-03 16:01:12,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.33333333333333) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:12,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:12,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 16:01:12,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:12,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash 958250418, now seen corresponding path program 1 times [2023-08-03 16:01:12,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:12,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871242032] [2023-08-03 16:01:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:12,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:12,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:12,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871242032] [2023-08-03 16:01:12,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871242032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:01:12,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182117058] [2023-08-03 16:01:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:12,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:01:12,265 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 16:01:12,267 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 16:01:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:12,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-03 16:01:12,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:01:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:12,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:01:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:12,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182117058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:01:12,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:01:12,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-03 16:01:12,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210107120] [2023-08-03 16:01:12,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:01:12,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 16:01:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 16:01:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:01:12,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 245 [2023-08-03 16:01:12,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 49 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 98.66666666666667) internal successors, (592), 6 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:12,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 245 [2023-08-03 16:01:12,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:12,592 INFO L124 PetriNetUnfolderBase]: 96/341 cut-off events. [2023-08-03 16:01:12,592 INFO L125 PetriNetUnfolderBase]: For 538/538 co-relation queries the response was YES. [2023-08-03 16:01:12,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 341 events. 96/341 cut-off events. For 538/538 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1460 event pairs, 62 based on Foata normal form. 2/309 useless extension candidates. Maximal degree in co-relation 1053. Up to 120 conditions per place. [2023-08-03 16:01:12,593 INFO L140 encePairwiseOnDemand]: 236/245 looper letters, 60 selfloop transitions, 12 changer transitions 8/83 dead transitions. [2023-08-03 16:01:12,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 617 flow [2023-08-03 16:01:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 16:01:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 16:01:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 939 transitions. [2023-08-03 16:01:12,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42585034013605444 [2023-08-03 16:01:12,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 939 transitions. [2023-08-03 16:01:12,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 939 transitions. [2023-08-03 16:01:12,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:12,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 939 transitions. [2023-08-03 16:01:12,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.33333333333333) internal successors, (939), 9 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,599 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,599 INFO L175 Difference]: Start difference. First operand has 74 places, 49 transitions, 319 flow. Second operand 9 states and 939 transitions. [2023-08-03 16:01:12,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 617 flow [2023-08-03 16:01:12,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 83 transitions, 607 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 16:01:12,602 INFO L231 Difference]: Finished difference. Result has 81 places, 48 transitions, 314 flow [2023-08-03 16:01:12,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=314, PETRI_PLACES=81, PETRI_TRANSITIONS=48} [2023-08-03 16:01:12,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2023-08-03 16:01:12,602 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 48 transitions, 314 flow [2023-08-03 16:01:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.66666666666667) internal successors, (592), 6 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:12,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:12,618 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 16:01:12,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 16:01:12,807 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:12,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2013093183, now seen corresponding path program 1 times [2023-08-03 16:01:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077762287] [2023-08-03 16:01:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:12,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:01:12,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077762287] [2023-08-03 16:01:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077762287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:12,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:12,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 16:01:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689719369] [2023-08-03 16:01:12,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:12,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 16:01:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 16:01:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:01:12,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 245 [2023-08-03 16:01:12,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 48 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 98.33333333333333) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:12,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:12,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 245 [2023-08-03 16:01:12,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:13,075 INFO L124 PetriNetUnfolderBase]: 90/301 cut-off events. [2023-08-03 16:01:13,075 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2023-08-03 16:01:13,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 301 events. 90/301 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1199 event pairs, 64 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 948. Up to 191 conditions per place. [2023-08-03 16:01:13,076 INFO L140 encePairwiseOnDemand]: 236/245 looper letters, 56 selfloop transitions, 11 changer transitions 2/72 dead transitions. [2023-08-03 16:01:13,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 554 flow [2023-08-03 16:01:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 16:01:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 16:01:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 927 transitions. [2023-08-03 16:01:13,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204081632653061 [2023-08-03 16:01:13,078 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 927 transitions. [2023-08-03 16:01:13,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 927 transitions. [2023-08-03 16:01:13,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:13,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 927 transitions. [2023-08-03 16:01:13,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.0) internal successors, (927), 9 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,082 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,083 INFO L175 Difference]: Start difference. First operand has 81 places, 48 transitions, 314 flow. Second operand 9 states and 927 transitions. [2023-08-03 16:01:13,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 554 flow [2023-08-03 16:01:13,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 506 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-08-03 16:01:13,085 INFO L231 Difference]: Finished difference. Result has 79 places, 49 transitions, 304 flow [2023-08-03 16:01:13,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=304, PETRI_PLACES=79, PETRI_TRANSITIONS=49} [2023-08-03 16:01:13,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2023-08-03 16:01:13,085 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 49 transitions, 304 flow [2023-08-03 16:01:13,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.33333333333333) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:13,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:13,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 16:01:13,086 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:13,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash 734836625, now seen corresponding path program 1 times [2023-08-03 16:01:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674256874] [2023-08-03 16:01:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674256874] [2023-08-03 16:01:13,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674256874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:01:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038891783] [2023-08-03 16:01:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:13,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:01:13,198 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 16:01:13,200 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 16:01:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:13,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-03 16:01:13,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:01:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:13,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:01:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:13,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038891783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:01:13,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:01:13,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-03 16:01:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571383303] [2023-08-03 16:01:13,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:01:13,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 16:01:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 16:01:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-03 16:01:13,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 245 [2023-08-03 16:01:13,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 49 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:13,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 245 [2023-08-03 16:01:13,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:13,611 INFO L124 PetriNetUnfolderBase]: 83/266 cut-off events. [2023-08-03 16:01:13,612 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2023-08-03 16:01:13,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 266 events. 83/266 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1063 event pairs, 44 based on Foata normal form. 7/249 useless extension candidates. Maximal degree in co-relation 826. Up to 97 conditions per place. [2023-08-03 16:01:13,613 INFO L140 encePairwiseOnDemand]: 235/245 looper letters, 49 selfloop transitions, 11 changer transitions 13/76 dead transitions. [2023-08-03 16:01:13,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 554 flow [2023-08-03 16:01:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 16:01:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 16:01:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1102 transitions. [2023-08-03 16:01:13,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40890538033395174 [2023-08-03 16:01:13,616 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1102 transitions. [2023-08-03 16:01:13,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1102 transitions. [2023-08-03 16:01:13,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:13,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1102 transitions. [2023-08-03 16:01:13,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 100.18181818181819) internal successors, (1102), 11 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,621 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,621 INFO L175 Difference]: Start difference. First operand has 79 places, 49 transitions, 304 flow. Second operand 11 states and 1102 transitions. [2023-08-03 16:01:13,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 554 flow [2023-08-03 16:01:13,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 76 transitions, 528 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-03 16:01:13,623 INFO L231 Difference]: Finished difference. Result has 83 places, 44 transitions, 272 flow [2023-08-03 16:01:13,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=272, PETRI_PLACES=83, PETRI_TRANSITIONS=44} [2023-08-03 16:01:13,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2023-08-03 16:01:13,624 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 44 transitions, 272 flow [2023-08-03 16:01:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:13,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:13,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:13,639 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 16:01:13,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:13,829 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:13,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1552692892, now seen corresponding path program 1 times [2023-08-03 16:01:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:13,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251955952] [2023-08-03 16:01:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:01:13,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251955952] [2023-08-03 16:01:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251955952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:01:13,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:01:13,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 16:01:13,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834074913] [2023-08-03 16:01:13,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:01:13,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 16:01:13,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 16:01:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-03 16:01:14,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 245 [2023-08-03 16:01:14,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 44 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:14,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 245 [2023-08-03 16:01:14,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:14,160 INFO L124 PetriNetUnfolderBase]: 59/198 cut-off events. [2023-08-03 16:01:14,160 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2023-08-03 16:01:14,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 198 events. 59/198 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 687 event pairs, 23 based on Foata normal form. 14/198 useless extension candidates. Maximal degree in co-relation 643. Up to 66 conditions per place. [2023-08-03 16:01:14,161 INFO L140 encePairwiseOnDemand]: 235/245 looper letters, 23 selfloop transitions, 2 changer transitions 36/63 dead transitions. [2023-08-03 16:01:14,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 63 transitions, 465 flow [2023-08-03 16:01:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 16:01:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 16:01:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1090 transitions. [2023-08-03 16:01:14,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044526901669759 [2023-08-03 16:01:14,165 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1090 transitions. [2023-08-03 16:01:14,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1090 transitions. [2023-08-03 16:01:14,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:14,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1090 transitions. [2023-08-03 16:01:14,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.0909090909091) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,170 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,170 INFO L175 Difference]: Start difference. First operand has 83 places, 44 transitions, 272 flow. Second operand 11 states and 1090 transitions. [2023-08-03 16:01:14,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 63 transitions, 465 flow [2023-08-03 16:01:14,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 420 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-03 16:01:14,172 INFO L231 Difference]: Finished difference. Result has 76 places, 23 transitions, 125 flow [2023-08-03 16:01:14,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=125, PETRI_PLACES=76, PETRI_TRANSITIONS=23} [2023-08-03 16:01:14,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2023-08-03 16:01:14,172 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 23 transitions, 125 flow [2023-08-03 16:01:14,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:01:14,172 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] [2023-08-03 16:01:14,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-03 16:01:14,173 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:01:14,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:01:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash 812018699, now seen corresponding path program 1 times [2023-08-03 16:01:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:01:14,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130865318] [2023-08-03 16:01:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:14,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:01:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:01:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130865318] [2023-08-03 16:01:14,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130865318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:01:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760650685] [2023-08-03 16:01:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:01:14,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:14,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:01:14,303 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 16:01:14,304 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 16:01:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:01:14,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-03 16:01:14,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:01:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:14,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:01:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 16:01:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760650685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:01:14,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:01:14,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-03 16:01:14,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464119738] [2023-08-03 16:01:14,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:01:14,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 16:01:14,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:01:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 16:01:14,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-03 16:01:14,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 245 [2023-08-03 16:01:14,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 23 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:01:14,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 245 [2023-08-03 16:01:14,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:01:14,639 INFO L124 PetriNetUnfolderBase]: 30/89 cut-off events. [2023-08-03 16:01:14,639 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-08-03 16:01:14,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 89 events. 30/89 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 229 event pairs, 5 based on Foata normal form. 1/90 useless extension candidates. Maximal degree in co-relation 318. Up to 31 conditions per place. [2023-08-03 16:01:14,640 INFO L140 encePairwiseOnDemand]: 235/245 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2023-08-03 16:01:14,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 35 transitions, 256 flow [2023-08-03 16:01:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 16:01:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 16:01:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 877 transitions. [2023-08-03 16:01:14,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39773242630385486 [2023-08-03 16:01:14,642 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 877 transitions. [2023-08-03 16:01:14,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 877 transitions. [2023-08-03 16:01:14,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:01:14,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 877 transitions. [2023-08-03 16:01:14,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.44444444444444) internal successors, (877), 9 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,647 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,647 INFO L175 Difference]: Start difference. First operand has 76 places, 23 transitions, 125 flow. Second operand 9 states and 877 transitions. [2023-08-03 16:01:14,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 35 transitions, 256 flow [2023-08-03 16:01:14,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 35 transitions, 224 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-08-03 16:01:14,648 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-03 16:01:14,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-03 16:01:14,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-03 16:01:14,648 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-03 16:01:14,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:01:14,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (8 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-03 16:01:14,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-03 16:01:14,659 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 16:01:14,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:01:14,854 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:01:14,856 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 16:01:14,856 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 16:01:14,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 04:01:14 BasicIcfg [2023-08-03 16:01:14,859 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 16:01:14,859 INFO L158 Benchmark]: Toolchain (without parser) took 11823.28ms. Allocated memory was 440.4MB in the beginning and 677.4MB in the end (delta: 237.0MB). Free memory was 403.4MB in the beginning and 387.6MB in the end (delta: 15.8MB). Peak memory consumption was 255.4MB. Max. memory is 16.0GB. [2023-08-03 16:01:14,860 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 308.3MB. Free memory is still 261.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 16:01:14,860 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.43ms. Allocated memory is still 440.4MB. Free memory was 403.1MB in the beginning and 384.1MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 16:01:14,860 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.46ms. Allocated memory is still 440.4MB. Free memory was 384.1MB in the beginning and 382.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:01:14,860 INFO L158 Benchmark]: Boogie Preprocessor took 27.39ms. Allocated memory is still 440.4MB. Free memory was 382.0MB in the beginning and 380.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:01:14,860 INFO L158 Benchmark]: RCFGBuilder took 382.89ms. Allocated memory is still 440.4MB. Free memory was 380.5MB in the beginning and 366.9MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 16:01:14,860 INFO L158 Benchmark]: TraceAbstraction took 11079.33ms. Allocated memory was 440.4MB in the beginning and 677.4MB in the end (delta: 237.0MB). Free memory was 365.9MB in the beginning and 387.6MB in the end (delta: -21.7MB). Peak memory consumption was 217.6MB. Max. memory is 16.0GB. [2023-08-03 16:01:14,862 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 308.3MB. Free memory is still 261.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 298.43ms. Allocated memory is still 440.4MB. Free memory was 403.1MB in the beginning and 384.1MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.46ms. Allocated memory is still 440.4MB. Free memory was 384.1MB in the beginning and 382.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.39ms. Allocated memory is still 440.4MB. Free memory was 382.0MB in the beginning and 380.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 382.89ms. Allocated memory is still 440.4MB. Free memory was 380.5MB in the beginning and 366.9MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 11079.33ms. Allocated memory was 440.4MB in the beginning and 677.4MB in the end (delta: 237.0MB). Free memory was 365.9MB in the beginning and 387.6MB in the end (delta: -21.7MB). Peak memory consumption was 217.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 90 PlacesBefore, 29 PlacesAfterwards, 93 TransitionsBefore, 28 TransitionsAfterwards, 2028 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 10 ConcurrentYvCompositions, 4 ChoiceCompositions, 89 TotalNumberOfCompositions, 4165 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2202, independent: 2019, independent conditional: 0, independent unconditional: 2019, dependent: 183, dependent conditional: 0, dependent unconditional: 183, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1160, independent: 1122, independent conditional: 0, independent unconditional: 1122, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2202, independent: 897, independent conditional: 0, independent unconditional: 897, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 1160, unknown conditional: 0, unknown unconditional: 1160] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 121 PlacesBefore, 44 PlacesAfterwards, 126 TransitionsBefore, 44 TransitionsAfterwards, 5980 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 72 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 10 ConcurrentYvCompositions, 5 ChoiceCompositions, 119 TotalNumberOfCompositions, 13001 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6433, independent: 6186, independent conditional: 0, independent unconditional: 6186, dependent: 247, dependent conditional: 0, dependent unconditional: 247, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3203, independent: 3141, independent conditional: 0, independent unconditional: 3141, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6433, independent: 3045, independent conditional: 0, independent unconditional: 3045, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 3203, unknown conditional: 0, unknown unconditional: 3203] , Statistics on independence cache: Total cache size (in pairs): 180, Positive cache size: 154, Positive conditional cache size: 0, Positive unconditional cache size: 154, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 117 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 54 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 125 IncrementalHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 2 mSDtfsCounter, 125 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=3, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 142 locations, 9 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.2s, OverallIterations: 17, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1231 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 876 mSDsluCounter, 642 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 453 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3248 IncrementalHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 189 mSDtfsCounter, 3248 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 282 GetRequests, 188 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=319occurred in iteration=12, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 338 NumberOfCodeBlocks, 338 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 402 ConstructedInterpolants, 0 QuantifiedInterpolants, 2476 SizeOfPredicates, 14 NumberOfNonLiveVariables, 850 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 28 InterpolantComputations, 12 PerfectInterpolantSequences, 71/109 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 16:01:14,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...