/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_stack_longer-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:13:31,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:13:31,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:13:31,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:13:31,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:13:31,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:13:31,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:13:31,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:13:31,382 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:13:31,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:13:31,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:13:31,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:13:31,383 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:13:31,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:13:31,383 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:13:31,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:13:31,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:13:31,384 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:13:31,384 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:13:31,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:13:31,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:13:31,389 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:13:31,390 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:13:31,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:13:31,390 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:13:31,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:13:31,391 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:13:31,391 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:13:31,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:13:31,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:13:31,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:13:31,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:13:31,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:13:31,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:13:31,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:13:31,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:13:31,393 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:13:31,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:13:31,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:13:31,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:13:31,393 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:13:31,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:13:31,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:13:31,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:13:31,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:13:31,564 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:13:31,565 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:13:31,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longer-2_bound2.i [2023-08-03 19:13:32,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:13:32,654 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:13:32,655 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longer-2_bound2.i [2023-08-03 19:13:32,672 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e3461763/ef230072f5734dd0aa8624ad101a24c5/FLAG62a083026 [2023-08-03 19:13:32,680 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e3461763/ef230072f5734dd0aa8624ad101a24c5 [2023-08-03 19:13:32,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:13:32,683 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:13:32,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:13:32,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:13:32,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:13:32,689 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:13:32" (1/1) ... [2023-08-03 19:13:32,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1428e62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:32, skipping insertion in model container [2023-08-03 19:13:32,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:13:32" (1/1) ... [2023-08-03 19:13:32,714 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:13:32,952 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_stack_longer-2_bound2.i[41529,41542] [2023-08-03 19:13:32,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:13:32,987 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:13:33,011 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:13:33,013 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:13:33,017 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-03 19:13:33,020 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_stack_longer-2_bound2.i[41529,41542] [2023-08-03 19:13:33,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:13:33,081 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:13:33,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33 WrapperNode [2023-08-03 19:13:33,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:13:33,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:13:33,083 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:13:33,083 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:13:33,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,137 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 181 [2023-08-03 19:13:33,137 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:13:33,138 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:13:33,138 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:13:33,138 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:13:33,144 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,157 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,169 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:13:33,174 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:13:33,174 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:13:33,174 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:13:33,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (1/1) ... [2023-08-03 19:13:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:13:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:13:33,200 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 19:13:33,212 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 19:13:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:13:33,226 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:13:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:13:33,227 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:13:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:13:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:13:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:13:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:13:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 19:13:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:13:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:13:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:13:33,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:13:33,230 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 19:13:33,316 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:13:33,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:13:33,559 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:13:33,564 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:13:33,564 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:13:33,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:13:33 BoogieIcfgContainer [2023-08-03 19:13:33,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:13:33,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:13:33,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:13:33,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:13:33,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:13:32" (1/3) ... [2023-08-03 19:13:33,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9c0e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:13:33, skipping insertion in model container [2023-08-03 19:13:33,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:13:33" (2/3) ... [2023-08-03 19:13:33,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9c0e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:13:33, skipping insertion in model container [2023-08-03 19:13:33,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:13:33" (3/3) ... [2023-08-03 19:13:33,571 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack_longer-2_bound2.i [2023-08-03 19:13:33,575 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:13:33,581 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:13:33,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 19:13:33,581 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:13:33,645 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:13:33,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 181 transitions, 384 flow [2023-08-03 19:13:33,749 INFO L124 PetriNetUnfolderBase]: 37/330 cut-off events. [2023-08-03 19:13:33,749 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:13:33,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 330 events. 37/330 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1442 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-03 19:13:33,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 181 transitions, 384 flow [2023-08-03 19:13:33,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 181 transitions, 384 flow [2023-08-03 19:13:33,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:13:33,780 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 181 transitions, 384 flow [2023-08-03 19:13:33,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 181 transitions, 384 flow [2023-08-03 19:13:33,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 181 transitions, 384 flow [2023-08-03 19:13:33,838 INFO L124 PetriNetUnfolderBase]: 37/330 cut-off events. [2023-08-03 19:13:33,838 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:13:33,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 330 events. 37/330 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1442 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-03 19:13:33,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-03 19:13:36,798 INFO L134 LiptonReduction]: Checked pairs total: 21109 [2023-08-03 19:13:36,799 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-03 19:13:36,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:13:36,812 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;@5aa9bcfe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:13:36,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 19:13:36,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:13:36,816 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-08-03 19:13:36,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:13:36,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:13:36,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:13:36,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 19:13:36,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:13:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash 434086919, now seen corresponding path program 1 times [2023-08-03 19:13:36,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:13:36,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350752151] [2023-08-03 19:13:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:13:36,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:13:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:13:36,918 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:13:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:13:36,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:13:36,948 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:13:36,949 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 19:13:36,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-03 19:13:36,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 19:13:36,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-03 19:13:36,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-03 19:13:36,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 19:13:36,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:13:36,951 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 19:13:36,953 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:13:36,953 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:13:36,983 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:13:36,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-03 19:13:37,081 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-03 19:13:37,081 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:13:37,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-03 19:13:37,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 287 transitions, 622 flow [2023-08-03 19:13:37,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 287 transitions, 622 flow [2023-08-03 19:13:37,096 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:13:37,096 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-03 19:13:37,096 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-03 19:13:37,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-03 19:13:37,189 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-03 19:13:37,189 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:13:37,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-03 19:13:37,231 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-03 19:13:40,762 INFO L134 LiptonReduction]: Checked pairs total: 79921 [2023-08-03 19:13:40,763 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-03 19:13:40,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:13:40,765 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;@5aa9bcfe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:13:40,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 19:13:40,767 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:13:40,767 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-03 19:13:40,768 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 19:13:40,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:13:40,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:13:40,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:13:40,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:13:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash -958934176, now seen corresponding path program 1 times [2023-08-03 19:13:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:13:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925774286] [2023-08-03 19:13:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:13:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:13:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:13:40,897 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 19:13:40,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:13:40,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925774286] [2023-08-03 19:13:40,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925774286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:13:40,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:13:40,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:13:40,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660204121] [2023-08-03 19:13:40,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:13:40,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:13:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:13:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:13:40,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:13:40,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 541 [2023-08-03 19:13:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:13:40,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:13:40,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 541 [2023-08-03 19:13:40,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:14:30,724 INFO L124 PetriNetUnfolderBase]: 803800/1036004 cut-off events. [2023-08-03 19:14:30,725 INFO L125 PetriNetUnfolderBase]: For 55246/55246 co-relation queries the response was YES. [2023-08-03 19:14:32,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2071526 conditions, 1036004 events. 803800/1036004 cut-off events. For 55246/55246 co-relation queries the response was YES. Maximal size of possible extension queue 20342. Compared 6968102 event pairs, 288919 based on Foata normal form. 9810/760466 useless extension candidates. Maximal degree in co-relation 1357527. Up to 603302 conditions per place. [2023-08-03 19:14:35,498 INFO L140 encePairwiseOnDemand]: 528/541 looper letters, 127 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2023-08-03 19:14:35,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 144 transitions, 641 flow [2023-08-03 19:14:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:14:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:14:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-08-03 19:14:35,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372766481823783 [2023-08-03 19:14:35,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-08-03 19:14:35,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-08-03 19:14:35,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:14:35,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-08-03 19:14:35,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:35,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:35,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:35,527 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 210 flow. Second operand 3 states and 872 transitions. [2023-08-03 19:14:35,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 144 transitions, 641 flow [2023-08-03 19:14:35,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 144 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:14:35,566 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 274 flow [2023-08-03 19:14:35,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2023-08-03 19:14:35,569 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-03 19:14:35,569 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 274 flow [2023-08-03 19:14:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:35,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:14:35,570 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:14:35,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:14:35,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:14:35,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:14:35,570 INFO L85 PathProgramCache]: Analyzing trace with hash 409571604, now seen corresponding path program 1 times [2023-08-03 19:14:35,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:14:35,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873336559] [2023-08-03 19:14:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:14:35,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:14:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:14:35,679 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 19:14:35,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:14:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873336559] [2023-08-03 19:14:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873336559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:14:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489663379] [2023-08-03 19:14:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:14:35,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:14:35,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:14:35,683 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 19:14:35,686 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 19:14:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:14:35,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:14:35,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:14:35,815 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 19:14:35,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:14:35,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489663379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:14:35,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:14:35,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:14:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003990644] [2023-08-03 19:14:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:14:35,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:14:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:14:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:14:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:14:35,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 541 [2023-08-03 19:14:35,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:35,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:14:35,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 541 [2023-08-03 19:14:35,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:15:29,659 INFO L124 PetriNetUnfolderBase]: 803524/1031338 cut-off events. [2023-08-03 19:15:29,660 INFO L125 PetriNetUnfolderBase]: For 209049/210643 co-relation queries the response was YES. [2023-08-03 19:15:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277356 conditions, 1031338 events. 803524/1031338 cut-off events. For 209049/210643 co-relation queries the response was YES. Maximal size of possible extension queue 19843. Compared 6862631 event pairs, 289228 based on Foata normal form. 0/798277 useless extension candidates. Maximal degree in co-relation 905466. Up to 1009868 conditions per place. [2023-08-03 19:15:34,739 INFO L140 encePairwiseOnDemand]: 537/541 looper letters, 109 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2023-08-03 19:15:34,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 594 flow [2023-08-03 19:15:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:15:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:15:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1366 transitions. [2023-08-03 19:15:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049907578558226 [2023-08-03 19:15:34,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1366 transitions. [2023-08-03 19:15:34,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1366 transitions. [2023-08-03 19:15:34,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:15:34,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1366 transitions. [2023-08-03 19:15:34,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 273.2) internal successors, (1366), 5 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:34,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:34,750 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:34,750 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 274 flow. Second operand 5 states and 1366 transitions. [2023-08-03 19:15:34,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 594 flow [2023-08-03 19:19:01,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 123 transitions, 568 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 19:19:01,359 INFO L231 Difference]: Finished difference. Result has 76 places, 89 transitions, 271 flow [2023-08-03 19:19:01,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=76, PETRI_TRANSITIONS=89} [2023-08-03 19:19:01,360 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-03 19:19:01,360 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 89 transitions, 271 flow [2023-08-03 19:19:01,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:19:01,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:19:01,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:19:01,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 19:19:01,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:19:01,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:19:01,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:19:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash 220691305, now seen corresponding path program 1 times [2023-08-03 19:19:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:19:01,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609783218] [2023-08-03 19:19:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:19:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:19:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:19:01,629 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 19:19:01,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:19:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609783218] [2023-08-03 19:19:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609783218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:19:01,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:19:01,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:19:01,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150073660] [2023-08-03 19:19:01,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:19:01,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:19:01,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:19:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:19:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:19:01,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 541 [2023-08-03 19:19:01,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 89 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:19:01,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:19:01,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 541 [2023-08-03 19:19:01,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:19:59,868 INFO L124 PetriNetUnfolderBase]: 885788/1156106 cut-off events. [2023-08-03 19:19:59,868 INFO L125 PetriNetUnfolderBase]: For 165669/166307 co-relation queries the response was YES. [2023-08-03 19:20:01,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2467074 conditions, 1156106 events. 885788/1156106 cut-off events. For 165669/166307 co-relation queries the response was YES. Maximal size of possible extension queue 23514. Compared 8384523 event pairs, 475206 based on Foata normal form. 48/882231 useless extension candidates. Maximal degree in co-relation 1653165. Up to 1010118 conditions per place. [2023-08-03 19:20:05,378 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 142 selfloop transitions, 3 changer transitions 0/154 dead transitions. [2023-08-03 19:20:05,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 154 transitions, 758 flow [2023-08-03 19:20:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:20:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:20:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2023-08-03 19:20:05,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547751078250154 [2023-08-03 19:20:05,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2023-08-03 19:20:05,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2023-08-03 19:20:05,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:20:05,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2023-08-03 19:20:05,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:20:05,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:20:05,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:20:05,385 INFO L175 Difference]: Start difference. First operand has 76 places, 89 transitions, 271 flow. Second operand 3 states and 889 transitions. [2023-08-03 19:20:05,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 154 transitions, 758 flow [2023-08-03 19:20:05,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 154 transitions, 757 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:20:05,402 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 285 flow [2023-08-03 19:20:05,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2023-08-03 19:20:05,402 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2023-08-03 19:20:05,403 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 285 flow [2023-08-03 19:20:05,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:20:05,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:20:05,403 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 19:20:05,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 19:20:05,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:20:05,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:20:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash -938631566, now seen corresponding path program 1 times [2023-08-03 19:20:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:20:05,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906929920] [2023-08-03 19:20:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:20:05,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:20:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:20:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:20:05,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:20:05,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906929920] [2023-08-03 19:20:05,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906929920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:20:05,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:20:05,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:20:05,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749301967] [2023-08-03 19:20:05,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:20:05,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:20:05,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:20:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:20:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:20:05,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 541 [2023-08-03 19:20:05,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:20:05,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:20:05,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 541 [2023-08-03 19:20:05,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:21:01,988 INFO L124 PetriNetUnfolderBase]: 885650/1137283 cut-off events. [2023-08-03 19:21:01,989 INFO L125 PetriNetUnfolderBase]: For 282474/284232 co-relation queries the response was YES. [2023-08-03 19:21:03,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2554033 conditions, 1137283 events. 885650/1137283 cut-off events. For 282474/284232 co-relation queries the response was YES. Maximal size of possible extension queue 22097. Compared 7622169 event pairs, 485362 based on Foata normal form. 1/863117 useless extension candidates. Maximal degree in co-relation 1490978. Up to 1113398 conditions per place. [2023-08-03 19:21:07,530 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 91 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-08-03 19:21:07,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 513 flow [2023-08-03 19:21:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:21:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:21:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-03 19:21:07,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194085027726433 [2023-08-03 19:21:07,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-03 19:21:07,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-03 19:21:07,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:21:07,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-03 19:21:07,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:21:07,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:21:07,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:21:07,537 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 285 flow. Second operand 3 states and 843 transitions. [2023-08-03 19:21:07,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 513 flow [2023-08-03 19:21:08,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:21:08,215 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 281 flow [2023-08-03 19:21:08,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2023-08-03 19:21:08,216 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2023-08-03 19:21:08,216 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 281 flow [2023-08-03 19:21:08,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:21:08,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:21:08,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:21:08,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 19:21:08,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:21:08,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:21:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -977980494, now seen corresponding path program 1 times [2023-08-03 19:21:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:21:08,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033302143] [2023-08-03 19:21:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:21:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:21:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:21:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:21:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:21:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033302143] [2023-08-03 19:21:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033302143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:21:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715021590] [2023-08-03 19:21:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:21:08,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:21:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:21:08,269 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 19:21:08,270 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 19:21:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:21:08,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:21:08,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:21:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:21:08,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:21:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:21:08,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715021590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:21:08,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:21:08,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-03 19:21:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680364164] [2023-08-03 19:21:08,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:21:08,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 19:21:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:21:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 19:21:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 19:21:08,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 541 [2023-08-03 19:21:08,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 242.7) internal successors, (2427), 10 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:21:08,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:21:08,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 541 [2023-08-03 19:21:08,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand