/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/pthread_fib_safe-12_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:01:12,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:01:12,515 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:01:12,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:01:12,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:01:12,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:01:12,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:01:12,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:01:12,559 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:01:12,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:01:12,565 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:01:12,565 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:01:12,566 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:01:12,566 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:01:12,566 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:01:12,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:01:12,566 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:01:12,567 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:01:12,567 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:01:12,567 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:01:12,567 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:01:12,568 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:01:12,568 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:01:12,568 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:01:12,568 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:01:12,568 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:01:12,569 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:01:12,569 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:01:12,569 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:01:12,569 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:01:12,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:01:12,570 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:01:12,571 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:01:12,572 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:01:12,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:01:12,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:01:12,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:01:12,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:01:12,787 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:01:12,789 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:01:12,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-12_bound2.i [2023-08-03 19:01:13,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:01:14,069 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:01:14,070 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-12_bound2.i [2023-08-03 19:01:14,085 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6b16dc1/8b6ea41f2b9b4a43b76a9c6a9ba80e76/FLAGdfff1dc37 [2023-08-03 19:01:14,097 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6b16dc1/8b6ea41f2b9b4a43b76a9c6a9ba80e76 [2023-08-03 19:01:14,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:01:14,100 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:01:14,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:01:14,101 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:01:14,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:01:14,104 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444e88f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14, skipping insertion in model container [2023-08-03 19:01:14,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,139 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:01:14,350 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-12_bound2.i[30241,30254] [2023-08-03 19:01:14,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:01:14,379 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:01:14,404 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [229] [2023-08-03 19:01:14,406 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [230] [2023-08-03 19:01:14,429 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-12_bound2.i[30241,30254] [2023-08-03 19:01:14,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:01:14,467 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 19:01:14,467 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 19:01:14,473 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:01:14,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14 WrapperNode [2023-08-03 19:01:14,475 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:01:14,476 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:01:14,476 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:01:14,476 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:01:14,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,532 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-08-03 19:01:14,532 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:01:14,533 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:01:14,533 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:01:14,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:01:14,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,552 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,557 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,559 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:01:14,560 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:01:14,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:01:14,560 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:01:14,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (1/1) ... [2023-08-03 19:01:14,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:01:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:14,596 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 19:01:14,605 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 19:01:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:01:14,626 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:01:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:01:14,626 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:01:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:01:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 19:01:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:01:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:01:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:01:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:01:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 19:01:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:01:14,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:01:14,628 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 19:01:14,728 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:01:14,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:01:14,901 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:01:14,907 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:01:14,908 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-03 19:01:14,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:01:14 BoogieIcfgContainer [2023-08-03 19:01:14,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:01:14,911 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:01:14,912 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:01:14,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:01:14,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:01:14" (1/3) ... [2023-08-03 19:01:14,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72000f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:01:14, skipping insertion in model container [2023-08-03 19:01:14,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:01:14" (2/3) ... [2023-08-03 19:01:14,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72000f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:01:14, skipping insertion in model container [2023-08-03 19:01:14,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:01:14" (3/3) ... [2023-08-03 19:01:14,916 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_fib_safe-12_bound2.i [2023-08-03 19:01:14,922 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:01:14,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:01:14,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:01:14,931 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:01:14,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 19:01:15,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-03 19:01:15,098 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-03 19:01:15,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:01:15,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-03 19:01:15,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-03 19:01:15,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-03 19:01:15,113 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:01:15,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-03 19:01:15,122 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-03 19:01:15,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-03 19:01:15,166 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-03 19:01:15,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:01:15,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-03 19:01:15,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-03 19:01:18,128 INFO L134 LiptonReduction]: Checked pairs total: 2006 [2023-08-03 19:01:18,128 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-03 19:01:18,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:01:18,146 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;@3ba23078, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:01:18,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:01:18,149 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:01:18,149 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-03 19:01:18,149 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:01:18,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:18,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 19:01:18,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:18,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash 12905250, now seen corresponding path program 1 times [2023-08-03 19:01:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765227865] [2023-08-03 19:01:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:18,323 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 19:01:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:18,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765227865] [2023-08-03 19:01:18,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765227865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:01:18,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:01:18,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:01:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856679347] [2023-08-03 19:01:18,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:01:18,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:01:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:01:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:01:18,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-03 19:01:18,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:18,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:18,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-03 19:01:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:18,435 INFO L124 PetriNetUnfolderBase]: 136/222 cut-off events. [2023-08-03 19:01:18,435 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:01:18,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 222 events. 136/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 587 event pairs, 30 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 438. Up to 211 conditions per place. [2023-08-03 19:01:18,438 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 19 selfloop transitions, 2 changer transitions 1/24 dead transitions. [2023-08-03 19:01:18,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 102 flow [2023-08-03 19:01:18,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:01:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:01:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-03 19:01:18,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864433811802233 [2023-08-03 19:01:18,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-03 19:01:18,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-03 19:01:18,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:18,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-03 19:01:18,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:18,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:18,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:18,473 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 50 flow. Second operand 3 states and 305 transitions. [2023-08-03 19:01:18,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 102 flow [2023-08-03 19:01:18,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:01:18,477 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 56 flow [2023-08-03 19:01:18,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-03 19:01:18,483 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-03 19:01:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 56 flow [2023-08-03 19:01:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:18,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:18,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:01:18,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:01:18,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:18,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash -465714586, now seen corresponding path program 1 times [2023-08-03 19:01:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:18,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348874375] [2023-08-03 19:01:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:01:18,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:01:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:01:18,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:01:18,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:01:18,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 19:01:18,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 19:01:18,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:01:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:01:18,590 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 19:01:18,592 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:01:18,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:01:18,618 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 19:01:18,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-03 19:01:18,693 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-03 19:01:18,693 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:01:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-03 19:01:18,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-03 19:01:18,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-03 19:01:18,702 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:01:18,702 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-03 19:01:18,702 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-03 19:01:18,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-03 19:01:18,749 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-03 19:01:18,750 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:01:18,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-03 19:01:18,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-03 19:01:21,283 INFO L134 LiptonReduction]: Checked pairs total: 12612 [2023-08-03 19:01:21,283 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-03 19:01:21,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:01:21,286 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;@3ba23078, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:01:21,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:01:21,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:01:21,287 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-03 19:01:21,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:01:21,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:21,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 19:01:21,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:21,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash 20942910, now seen corresponding path program 1 times [2023-08-03 19:01:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:21,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092170121] [2023-08-03 19:01:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:21,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:21,348 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 19:01:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092170121] [2023-08-03 19:01:21,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092170121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:01:21,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:01:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:01:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352587638] [2023-08-03 19:01:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:01:21,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:01:21,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:01:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:01:21,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-03 19:01:21,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 108 flow. Second operand has 3 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 19:01:21,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:21,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-03 19:01:21,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:21,740 INFO L124 PetriNetUnfolderBase]: 3244/5230 cut-off events. [2023-08-03 19:01:21,740 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-03 19:01:21,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9663 conditions, 5230 events. 3244/5230 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29355 event pairs, 1386 based on Foata normal form. 0/4639 useless extension candidates. Maximal degree in co-relation 3014. Up to 4201 conditions per place. [2023-08-03 19:01:21,773 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 28 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-03 19:01:21,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 180 flow [2023-08-03 19:01:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:01:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:01:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-03 19:01:21,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260196905766527 [2023-08-03 19:01:21,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-03 19:01:21,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-03 19:01:21,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:21,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-03 19:01:21,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:21,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:21,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:21,781 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 3 states and 374 transitions. [2023-08-03 19:01:21,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 180 flow [2023-08-03 19:01:21,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 19:01:21,784 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2023-08-03 19:01:21,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-03 19:01:21,785 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-03 19:01:21,785 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2023-08-03 19:01:21,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 19:01:21,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:21,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:21,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 19:01:21,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:21,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 659291704, now seen corresponding path program 1 times [2023-08-03 19:01:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:21,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268641183] [2023-08-03 19:01:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:21,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:21,864 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 19:01:21,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268641183] [2023-08-03 19:01:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268641183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608651741] [2023-08-03 19:01:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:21,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:21,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:21,868 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 19:01:21,894 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 19:01:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:21,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:01:21,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:01:21,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:01:21,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608651741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:01:21,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:01:21,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 19:01:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867367453] [2023-08-03 19:01:21,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:01:21,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:01:21,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:01:21,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:01:21,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-03 19:01:21,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:21,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:21,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-03 19:01:21,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:22,329 INFO L124 PetriNetUnfolderBase]: 2665/4177 cut-off events. [2023-08-03 19:01:22,330 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-03 19:01:22,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 4177 events. 2665/4177 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21236 event pairs, 1120 based on Foata normal form. 0/3827 useless extension candidates. Maximal degree in co-relation 7803. Up to 3271 conditions per place. [2023-08-03 19:01:22,356 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-03 19:01:22,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 210 flow [2023-08-03 19:01:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:01:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:01:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-03 19:01:22,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-03 19:01:22,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-03 19:01:22,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-03 19:01:22,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:22,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-03 19:01:22,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:22,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:22,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:22,361 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 3 states and 379 transitions. [2023-08-03 19:01:22,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 210 flow [2023-08-03 19:01:22,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:01:22,365 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 124 flow [2023-08-03 19:01:22,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-03 19:01:22,367 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-03 19:01:22,368 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 124 flow [2023-08-03 19:01:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:22,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:22,368 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:01:22,378 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 19:01:22,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:22,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:22,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash 479947437, now seen corresponding path program 1 times [2023-08-03 19:01:22,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:22,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407798328] [2023-08-03 19:01:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:22,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:22,666 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 19:01:22,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:22,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407798328] [2023-08-03 19:01:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407798328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031700516] [2023-08-03 19:01:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:22,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:22,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:22,670 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 19:01:22,673 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 19:01:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:22,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:01:22,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:22,773 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 19:01:22,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:01:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031700516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:01:22,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:01:22,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:01:22,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960107675] [2023-08-03 19:01:22,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:01:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:01:22,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:01:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:01:22,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:22,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:22,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:22,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:22,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:23,071 INFO L124 PetriNetUnfolderBase]: 2647/4168 cut-off events. [2023-08-03 19:01:23,071 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-08-03 19:01:23,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8137 conditions, 4168 events. 2647/4168 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 21528 event pairs, 744 based on Foata normal form. 9/3968 useless extension candidates. Maximal degree in co-relation 2506. Up to 3381 conditions per place. [2023-08-03 19:01:23,098 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 34 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-03 19:01:23,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 223 flow [2023-08-03 19:01:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:01:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:01:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-08-03 19:01:23,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088607594936709 [2023-08-03 19:01:23,100 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-08-03 19:01:23,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-08-03 19:01:23,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:23,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-08-03 19:01:23,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,104 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,104 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 124 flow. Second operand 5 states and 603 transitions. [2023-08-03 19:01:23,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 223 flow [2023-08-03 19:01:23,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 19:01:23,106 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 140 flow [2023-08-03 19:01:23,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-03 19:01:23,107 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-08-03 19:01:23,107 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 140 flow [2023-08-03 19:01:23,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:23,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:23,115 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 19:01:23,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:23,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:23,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:23,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1771737091, now seen corresponding path program 1 times [2023-08-03 19:01:23,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944935556] [2023-08-03 19:01:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:23,382 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 19:01:23,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944935556] [2023-08-03 19:01:23,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944935556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:23,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97107338] [2023-08-03 19:01:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:23,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:23,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:23,385 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 19:01:23,387 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 19:01:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:23,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:01:23,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:23,464 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 19:01:23,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:01:23,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97107338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:01:23,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:01:23,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-03 19:01:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477133908] [2023-08-03 19:01:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:01:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:01:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:01:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:01:23,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-03 19:01:23,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:23,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-03 19:01:23,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:23,778 INFO L124 PetriNetUnfolderBase]: 3151/4723 cut-off events. [2023-08-03 19:01:23,779 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-03 19:01:23,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9346 conditions, 4723 events. 3151/4723 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23183 event pairs, 1298 based on Foata normal form. 0/4480 useless extension candidates. Maximal degree in co-relation 2896. Up to 2628 conditions per place. [2023-08-03 19:01:23,806 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 39 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-03 19:01:23,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 248 flow [2023-08-03 19:01:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:01:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:01:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-03 19:01:23,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358649789029536 [2023-08-03 19:01:23,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-03 19:01:23,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-03 19:01:23,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:23,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-03 19:01:23,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,812 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 140 flow. Second operand 3 states and 381 transitions. [2023-08-03 19:01:23,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 248 flow [2023-08-03 19:01:23,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 241 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:01:23,814 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 145 flow [2023-08-03 19:01:23,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-03 19:01:23,814 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-03 19:01:23,815 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 145 flow [2023-08-03 19:01:23,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:23,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:23,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:23,823 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 19:01:24,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:24,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:24,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 910725763, now seen corresponding path program 1 times [2023-08-03 19:01:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925363653] [2023-08-03 19:01:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:01:24,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925363653] [2023-08-03 19:01:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925363653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733513406] [2023-08-03 19:01:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:24,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:24,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:24,085 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 19:01:24,087 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 19:01:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:24,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:01:24,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:01:24,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:01:24,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733513406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:24,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:24,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 19:01:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984550164] [2023-08-03 19:01:24,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:24,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:01:24,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:01:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:01:24,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:24,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:24,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:24,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:24,498 INFO L124 PetriNetUnfolderBase]: 2539/3799 cut-off events. [2023-08-03 19:01:24,498 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-03 19:01:24,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7886 conditions, 3799 events. 2539/3799 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17857 event pairs, 684 based on Foata normal form. 3/3617 useless extension candidates. Maximal degree in co-relation 5090. Up to 3196 conditions per place. [2023-08-03 19:01:24,519 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-03 19:01:24,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 235 flow [2023-08-03 19:01:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:01:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:01:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-03 19:01:24,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158227848101266 [2023-08-03 19:01:24,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-03 19:01:24,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-03 19:01:24,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:24,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-03 19:01:24,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,526 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 145 flow. Second operand 4 states and 489 transitions. [2023-08-03 19:01:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 235 flow [2023-08-03 19:01:24,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:01:24,528 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 141 flow [2023-08-03 19:01:24,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-03 19:01:24,529 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-03 19:01:24,530 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 141 flow [2023-08-03 19:01:24,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:24,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:24,539 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 19:01:24,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:24,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:24,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2021396342, now seen corresponding path program 1 times [2023-08-03 19:01:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:24,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131775419] [2023-08-03 19:01:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:01:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131775419] [2023-08-03 19:01:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131775419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785297458] [2023-08-03 19:01:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:24,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:24,801 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 19:01:24,803 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 19:01:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:24,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:01:24,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:01:24,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:01:24,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785297458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:24,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:24,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:01:24,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037355094] [2023-08-03 19:01:24,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:24,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:01:24,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:01:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:01:24,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:24,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:24,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:24,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:24,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:25,138 INFO L124 PetriNetUnfolderBase]: 2269/3166 cut-off events. [2023-08-03 19:01:25,139 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-03 19:01:25,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 3166 events. 2269/3166 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12223 event pairs, 508 based on Foata normal form. 27/3069 useless extension candidates. Maximal degree in co-relation 4658. Up to 1768 conditions per place. [2023-08-03 19:01:25,157 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 47 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-03 19:01:25,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 289 flow [2023-08-03 19:01:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:01:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:01:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-03 19:01:25,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2023-08-03 19:01:25,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-03 19:01:25,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-03 19:01:25,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:25,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-03 19:01:25,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,162 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 141 flow. Second operand 4 states and 502 transitions. [2023-08-03 19:01:25,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 289 flow [2023-08-03 19:01:25,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 283 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:01:25,164 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 155 flow [2023-08-03 19:01:25,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-08-03 19:01:25,165 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-08-03 19:01:25,165 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 155 flow [2023-08-03 19:01:25,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:25,166 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:25,175 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 19:01:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:25,371 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:25,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash 535273550, now seen corresponding path program 1 times [2023-08-03 19:01:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:25,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090286587] [2023-08-03 19:01:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:25,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:01:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090286587] [2023-08-03 19:01:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090286587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045933596] [2023-08-03 19:01:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:25,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:25,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:25,420 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 19:01:25,421 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 19:01:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:25,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:01:25,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:01:25,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:01:25,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045933596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:01:25,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:01:25,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 19:01:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927171217] [2023-08-03 19:01:25,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:01:25,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:01:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:25,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:01:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:01:25,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:25,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:25,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:25,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:25,729 INFO L124 PetriNetUnfolderBase]: 1945/2653 cut-off events. [2023-08-03 19:01:25,729 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-08-03 19:01:25,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 2653 events. 1945/2653 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9146 event pairs, 22 based on Foata normal form. 81/2610 useless extension candidates. Maximal degree in co-relation 4025. Up to 1701 conditions per place. [2023-08-03 19:01:25,768 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 53 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-03 19:01:25,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 315 flow [2023-08-03 19:01:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:01:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:01:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2023-08-03 19:01:25,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232067510548524 [2023-08-03 19:01:25,774 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 620 transitions. [2023-08-03 19:01:25,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 620 transitions. [2023-08-03 19:01:25,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:25,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 620 transitions. [2023-08-03 19:01:25,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,778 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 155 flow. Second operand 5 states and 620 transitions. [2023-08-03 19:01:25,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 315 flow [2023-08-03 19:01:25,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 308 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 19:01:25,782 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 144 flow [2023-08-03 19:01:25,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-08-03 19:01:25,783 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-08-03 19:01:25,784 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 144 flow [2023-08-03 19:01:25,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:25,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:25,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:25,789 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 19:01:25,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:25,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:25,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash -586395900, now seen corresponding path program 1 times [2023-08-03 19:01:25,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:25,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832227625] [2023-08-03 19:01:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:25,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:26,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832227625] [2023-08-03 19:01:26,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832227625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:26,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94284002] [2023-08-03 19:01:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:26,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:26,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:26,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:01:26,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 19:01:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:26,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:01:26,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:26,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:26,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94284002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:26,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:26,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-03 19:01:26,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520626484] [2023-08-03 19:01:26,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:26,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 19:01:26,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:26,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 19:01:26,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 19:01:26,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:26,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:26,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:26,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:26,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:26,438 INFO L124 PetriNetUnfolderBase]: 2917/4003 cut-off events. [2023-08-03 19:01:26,438 INFO L125 PetriNetUnfolderBase]: For 955/955 co-relation queries the response was YES. [2023-08-03 19:01:26,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8819 conditions, 4003 events. 2917/4003 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15112 event pairs, 784 based on Foata normal form. 0/3858 useless extension candidates. Maximal degree in co-relation 4106. Up to 1587 conditions per place. [2023-08-03 19:01:26,460 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 74 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-08-03 19:01:26,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 93 transitions, 410 flow [2023-08-03 19:01:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:01:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:01:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-03 19:01:26,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-03 19:01:26,462 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-03 19:01:26,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-03 19:01:26,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:26,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-03 19:01:26,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:26,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:26,467 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:26,467 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 144 flow. Second operand 6 states and 758 transitions. [2023-08-03 19:01:26,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 93 transitions, 410 flow [2023-08-03 19:01:26,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 93 transitions, 405 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:01:26,470 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 175 flow [2023-08-03 19:01:26,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-08-03 19:01:26,470 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2023-08-03 19:01:26,470 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 175 flow [2023-08-03 19:01:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:26,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:26,471 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:26,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 19:01:26,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:26,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:26,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1687533220, now seen corresponding path program 2 times [2023-08-03 19:01:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173820942] [2023-08-03 19:01:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:26,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:26,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173820942] [2023-08-03 19:01:26,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173820942] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:26,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291936517] [2023-08-03 19:01:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:01:26,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:26,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:01:26,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 19:01:26,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:01:26,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:01:26,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 19:01:26,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:26,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291936517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:26,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:26,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-03 19:01:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031648250] [2023-08-03 19:01:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 19:01:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 19:01:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-03 19:01:26,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:26,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 175 flow. Second operand has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:26,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:26,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:27,459 INFO L124 PetriNetUnfolderBase]: 4861/6433 cut-off events. [2023-08-03 19:01:27,460 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-03 19:01:27,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15510 conditions, 6433 events. 4861/6433 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 22810 event pairs, 784 based on Foata normal form. 486/6855 useless extension candidates. Maximal degree in co-relation 6100. Up to 1587 conditions per place. [2023-08-03 19:01:27,497 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 146 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2023-08-03 19:01:27,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 171 transitions, 765 flow [2023-08-03 19:01:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 19:01:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 19:01:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1517 transitions. [2023-08-03 19:01:27,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334036568213784 [2023-08-03 19:01:27,502 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1517 transitions. [2023-08-03 19:01:27,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1517 transitions. [2023-08-03 19:01:27,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:27,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1517 transitions. [2023-08-03 19:01:27,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.41666666666667) internal successors, (1517), 12 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:27,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:27,514 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:27,514 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 175 flow. Second operand 12 states and 1517 transitions. [2023-08-03 19:01:27,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 171 transitions, 765 flow [2023-08-03 19:01:27,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 171 transitions, 751 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 19:01:27,523 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 245 flow [2023-08-03 19:01:27,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=245, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-08-03 19:01:27,524 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-08-03 19:01:27,524 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 245 flow [2023-08-03 19:01:27,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:27,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:27,525 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:27,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 19:01:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 19:01:27,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:27,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1621563300, now seen corresponding path program 3 times [2023-08-03 19:01:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:27,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945533758] [2023-08-03 19:01:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945533758] [2023-08-03 19:01:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945533758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100107980] [2023-08-03 19:01:27,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 19:01:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:27,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:27,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:01:27,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 19:01:28,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-03 19:01:28,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:01:28,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-03 19:01:28,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:28,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:28,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100107980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:28,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:28,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-03 19:01:28,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632570812] [2023-08-03 19:01:28,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-03 19:01:28,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:28,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-03 19:01:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-03 19:01:28,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:28,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 245 flow. Second operand has 25 states, 25 states have (on average 114.44) internal successors, (2861), 25 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:28,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:28,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:28,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:29,359 INFO L124 PetriNetUnfolderBase]: 8749/11293 cut-off events. [2023-08-03 19:01:29,360 INFO L125 PetriNetUnfolderBase]: For 38347/38347 co-relation queries the response was YES. [2023-08-03 19:01:29,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29530 conditions, 11293 events. 8749/11293 cut-off events. For 38347/38347 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 38208 event pairs, 784 based on Foata normal form. 972/12201 useless extension candidates. Maximal degree in co-relation 12580. Up to 1702 conditions per place. [2023-08-03 19:01:29,412 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 290 selfloop transitions, 23 changer transitions 0/327 dead transitions. [2023-08-03 19:01:29,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 327 transitions, 1495 flow [2023-08-03 19:01:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-03 19:01:29,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-03 19:01:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3035 transitions. [2023-08-03 19:01:29,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335794655414908 [2023-08-03 19:01:29,419 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3035 transitions. [2023-08-03 19:01:29,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3035 transitions. [2023-08-03 19:01:29,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:29,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3035 transitions. [2023-08-03 19:01:29,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 126.45833333333333) internal successors, (3035), 24 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:29,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 237.0) internal successors, (5925), 25 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:29,545 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 237.0) internal successors, (5925), 25 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:29,545 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 245 flow. Second operand 24 states and 3035 transitions. [2023-08-03 19:01:29,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 327 transitions, 1495 flow [2023-08-03 19:01:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 327 transitions, 1423 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-08-03 19:01:29,572 INFO L231 Difference]: Finished difference. Result has 109 places, 63 transitions, 365 flow [2023-08-03 19:01:29,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=365, PETRI_PLACES=109, PETRI_TRANSITIONS=63} [2023-08-03 19:01:29,572 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2023-08-03 19:01:29,572 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 63 transitions, 365 flow [2023-08-03 19:01:29,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 114.44) internal successors, (2861), 25 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:29,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:29,574 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:29,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 19:01:29,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:29,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:29,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1737254492, now seen corresponding path program 4 times [2023-08-03 19:01:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:29,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738740485] [2023-08-03 19:01:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:29,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:30,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:30,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738740485] [2023-08-03 19:01:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738740485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446205889] [2023-08-03 19:01:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 19:01:30,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:30,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:01:30,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 19:01:30,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 19:01:30,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:01:30,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-03 19:01:30,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:30,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446205889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:30,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:30,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2023-08-03 19:01:30,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083713193] [2023-08-03 19:01:30,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:30,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-03 19:01:30,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-03 19:01:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-08-03 19:01:30,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:01:30,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 63 transitions, 365 flow. Second operand has 29 states, 29 states have (on average 114.41379310344827) internal successors, (3318), 29 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:30,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:30,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:01:30,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:01:32,076 INFO L124 PetriNetUnfolderBase]: 10045/12913 cut-off events. [2023-08-03 19:01:32,077 INFO L125 PetriNetUnfolderBase]: For 84517/84517 co-relation queries the response was YES. [2023-08-03 19:01:32,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34726 conditions, 12913 events. 10045/12913 cut-off events. For 84517/84517 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 43362 event pairs, 784 based on Foata normal form. 324/13173 useless extension candidates. Maximal degree in co-relation 25216. Up to 1704 conditions per place. [2023-08-03 19:01:32,146 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 338 selfloop transitions, 27 changer transitions 0/379 dead transitions. [2023-08-03 19:01:32,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 379 transitions, 1751 flow [2023-08-03 19:01:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-03 19:01:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-03 19:01:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3531 transitions. [2023-08-03 19:01:32,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320976491862568 [2023-08-03 19:01:32,155 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3531 transitions. [2023-08-03 19:01:32,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3531 transitions. [2023-08-03 19:01:32,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:01:32,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3531 transitions. [2023-08-03 19:01:32,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 126.10714285714286) internal successors, (3531), 28 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:32,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 237.0) internal successors, (6873), 29 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:32,172 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 237.0) internal successors, (6873), 29 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:32,172 INFO L175 Difference]: Start difference. First operand has 109 places, 63 transitions, 365 flow. Second operand 28 states and 3531 transitions. [2023-08-03 19:01:32,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 379 transitions, 1751 flow [2023-08-03 19:01:32,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 379 transitions, 1647 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-08-03 19:01:32,234 INFO L231 Difference]: Finished difference. Result has 129 places, 67 transitions, 365 flow [2023-08-03 19:01:32,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=365, PETRI_PLACES=129, PETRI_TRANSITIONS=67} [2023-08-03 19:01:32,234 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2023-08-03 19:01:32,235 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 67 transitions, 365 flow [2023-08-03 19:01:32,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.41379310344827) internal successors, (3318), 29 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:32,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:01:32,236 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:01:32,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 19:01:32,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 19:01:32,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:01:32,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:01:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1699975260, now seen corresponding path program 5 times [2023-08-03 19:01:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:01:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689921105] [2023-08-03 19:01:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:01:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:01:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:01:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:01:34,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689921105] [2023-08-03 19:01:34,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689921105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:01:34,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30783148] [2023-08-03 19:01:34,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-03 19:01:34,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:01:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:01:34,531 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:01:34,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 19:01:34,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-08-03 19:01:34,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:01:34,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-03 19:01:34,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:01:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:36,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:01:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:01:37,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30783148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:01:37,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:01:37,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2023-08-03 19:01:37,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730594994] [2023-08-03 19:01:37,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:01:37,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-08-03 19:01:37,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:01:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-08-03 19:01:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1193, Invalid=5613, Unknown=0, NotChecked=0, Total=6806 [2023-08-03 19:01:40,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 237 [2023-08-03 19:01:40,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 67 transitions, 365 flow. Second operand has 83 states, 83 states have (on average 107.37349397590361) internal successors, (8912), 83 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:01:40,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:01:40,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 237 [2023-08-03 19:01:40,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand