/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-1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:12:04,186 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:12:04,236 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:12:04,240 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:12:04,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:12:04,241 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:12:04,241 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:12:04,259 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:12:04,260 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:12:04,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:12:04,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:12:04,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:12:04,261 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:12:04,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:12:04,262 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:12:04,262 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:12:04,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:12:04,263 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:12:04,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:12:04,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:12:04,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:12:04,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:12:04,265 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:12:04,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:12:04,265 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:12:04,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:12:04,266 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:12:04,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:12:04,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:12:04,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:12:04,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:12:04,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:12:04,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:12:04,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:12:04,268 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:12:04,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:12:04,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:12:04,269 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:12:04,269 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:12:04,270 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:12:04,270 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:12:04,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:12:04,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:12:04,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:12:04,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:12:04,474 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:12:04,476 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:12:04,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i [2023-08-03 19:12:05,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:12:05,975 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:12:05,975 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i [2023-08-03 19:12:05,997 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc0d4b9d/b64ffcd08660440a86eee9c4ca2c59c5/FLAG5dddda675 [2023-08-03 19:12:06,014 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc0d4b9d/b64ffcd08660440a86eee9c4ca2c59c5 [2023-08-03 19:12:06,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:12:06,020 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:12:06,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:12:06,021 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:12:06,025 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:12:06,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc0cf0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06, skipping insertion in model container [2023-08-03 19:12:06,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,082 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:12:06,376 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-1_bound2.i[41520,41533] [2023-08-03 19:12:06,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:12:06,422 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:12:06,442 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:12:06,444 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:12:06,459 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-03 19:12:06,464 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-1_bound2.i[41520,41533] [2023-08-03 19:12:06,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:12:06,524 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:12:06,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06 WrapperNode [2023-08-03 19:12:06,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:12:06,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:12:06,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:12:06,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:12:06,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,581 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 185 [2023-08-03 19:12:06,582 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:12:06,582 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:12:06,582 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:12:06,582 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:12:06,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,609 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,609 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,619 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:12:06,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:12:06,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:12:06,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:12:06,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (1/1) ... [2023-08-03 19:12:06,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:12:06,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:12:06,669 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 19:12:06,683 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 19:12:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:12:06,707 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:12:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:12:06,707 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:12:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:12:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:12:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:12:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:12:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 19:12:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:12:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:12:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:12:06,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:12:06,711 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 19:12:06,865 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:12:06,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:12:07,102 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:12:07,108 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:12:07,109 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:12:07,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:12:07 BoogieIcfgContainer [2023-08-03 19:12:07,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:12:07,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:12:07,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:12:07,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:12:07,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:12:06" (1/3) ... [2023-08-03 19:12:07,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fef9011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:12:07, skipping insertion in model container [2023-08-03 19:12:07,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:12:06" (2/3) ... [2023-08-03 19:12:07,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fef9011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:12:07, skipping insertion in model container [2023-08-03 19:12:07,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:12:07" (3/3) ... [2023-08-03 19:12:07,120 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack-1_bound2.i [2023-08-03 19:12:07,126 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:12:07,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:12:07,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 19:12:07,133 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:12:07,229 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:12:07,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-03 19:12:07,364 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-03 19:12:07,365 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:12:07,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 334 events. 37/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1453 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-03 19:12:07,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 185 transitions, 392 flow [2023-08-03 19:12:07,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 185 transitions, 392 flow [2023-08-03 19:12:07,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:12:07,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-03 19:12:07,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-03 19:12:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-03 19:12:07,480 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-03 19:12:07,480 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:12:07,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 334 events. 37/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1453 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-03 19:12:07,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-03 19:12:11,402 INFO L134 LiptonReduction]: Checked pairs total: 20837 [2023-08-03 19:12:11,402 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-03 19:12:11,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:12:11,420 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;@1d0e75aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:12:11,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 19:12:11,425 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:12:11,425 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-08-03 19:12:11,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:12:11,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:12:11,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:12:11,426 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 19:12:11,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:12:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash 743719019, now seen corresponding path program 1 times [2023-08-03 19:12:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:12:11,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866510305] [2023-08-03 19:12:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:12:11,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:12:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:12:11,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:12:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:12:11,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:12:11,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:12:11,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 19:12:11,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-03 19:12:11,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 19:12:11,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-03 19:12:11,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-03 19:12:11,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 19:12:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:12:11,591 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 19:12:11,597 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:12:11,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:12:11,663 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:12:11,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-03 19:12:11,838 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-03 19:12:11,838 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:12:11,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 989 events. 141/989 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6104 event pairs, 1 based on Foata normal form. 0/853 useless extension candidates. Maximal degree in co-relation 603. Up to 32 conditions per place. [2023-08-03 19:12:11,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 291 transitions, 630 flow [2023-08-03 19:12:11,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 291 transitions, 630 flow [2023-08-03 19:12:11,887 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:12:11,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-03 19:12:11,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-03 19:12:11,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-03 19:12:12,037 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-03 19:12:12,038 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:12:12,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 989 events. 141/989 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6104 event pairs, 1 based on Foata normal form. 0/853 useless extension candidates. Maximal degree in co-relation 603. Up to 32 conditions per place. [2023-08-03 19:12:12,101 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-03 19:12:16,718 INFO L134 LiptonReduction]: Checked pairs total: 85759 [2023-08-03 19:12:16,718 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-03 19:12:16,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:12:16,721 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;@1d0e75aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:12:16,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 19:12:16,725 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:12:16,725 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-03 19:12:16,726 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 19:12:16,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:12:16,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:12:16,726 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 19:12:16,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:12:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash 424041319, now seen corresponding path program 1 times [2023-08-03 19:12:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:12:16,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348451821] [2023-08-03 19:12:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:12:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:12:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:12:16,922 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 19:12:16,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:12:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348451821] [2023-08-03 19:12:16,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348451821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:12:16,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:12:16,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:12:16,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289056224] [2023-08-03 19:12:16,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:12:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:12:16,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:12:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:12:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:12:16,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 558 [2023-08-03 19:12:16,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:12:16,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:12:16,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 558 [2023-08-03 19:12:16,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:13:20,915 INFO L124 PetriNetUnfolderBase]: 877820/1122299 cut-off events. [2023-08-03 19:13:20,916 INFO L125 PetriNetUnfolderBase]: For 59132/59132 co-relation queries the response was YES. [2023-08-03 19:13:22,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252648 conditions, 1122299 events. 877820/1122299 cut-off events. For 59132/59132 co-relation queries the response was YES. Maximal size of possible extension queue 21573. Compared 7443258 event pairs, 317462 based on Foata normal form. 0/806351 useless extension candidates. Maximal degree in co-relation 1468949. Up to 652928 conditions per place. [2023-08-03 19:13:26,880 INFO L140 encePairwiseOnDemand]: 545/558 looper letters, 129 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2023-08-03 19:13:26,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 145 transitions, 647 flow [2023-08-03 19:13:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:13:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:13:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 886 transitions. [2023-08-03 19:13:26,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292712066905615 [2023-08-03 19:13:26,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 886 transitions. [2023-08-03 19:13:26,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 886 transitions. [2023-08-03 19:13:26,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:13:26,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 886 transitions. [2023-08-03 19:13:26,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:13:26,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:13:26,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:13:26,917 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 210 flow. Second operand 3 states and 886 transitions. [2023-08-03 19:13:26,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 145 transitions, 647 flow [2023-08-03 19:13:27,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 145 transitions, 647 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:13:27,005 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 274 flow [2023-08-03 19:13:27,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, 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 19:13:27,009 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-03 19:13:27,010 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 274 flow [2023-08-03 19:13:27,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:13:27,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:13:27,010 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:13:27,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:13:27,011 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 19:13:27,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:13:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash -513748122, now seen corresponding path program 1 times [2023-08-03 19:13:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:13:27,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50962597] [2023-08-03 19:13:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:13:27,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:13:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:13:27,106 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 19:13:27,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:13:27,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50962597] [2023-08-03 19:13:27,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50962597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:13:27,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763410847] [2023-08-03 19:13:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:13:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:13:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:13:27,113 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 19:13:27,116 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 19:13:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:13:27,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:13:27,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:13:27,279 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 19:13:27,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:13:27,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763410847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:13:27,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:13:27,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:13:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391633413] [2023-08-03 19:13:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:13:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:13:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:13:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:13:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:13:27,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 558 [2023-08-03 19:13:27,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 257.6) internal successors, (1288), 5 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:13:27,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:13:27,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 558 [2023-08-03 19:13:27,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:14:38,136 INFO L124 PetriNetUnfolderBase]: 877544/1117132 cut-off events. [2023-08-03 19:14:38,136 INFO L125 PetriNetUnfolderBase]: For 214597/214597 co-relation queries the response was YES. [2023-08-03 19:14:40,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472495 conditions, 1117132 events. 877544/1117132 cut-off events. For 214597/214597 co-relation queries the response was YES. Maximal size of possible extension queue 20934. Compared 7321052 event pairs, 320195 based on Foata normal form. 0/867159 useless extension candidates. Maximal degree in co-relation 980734. Up to 1103158 conditions per place. [2023-08-03 19:14:44,458 INFO L140 encePairwiseOnDemand]: 554/558 looper letters, 110 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2023-08-03 19:14:44,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 596 flow [2023-08-03 19:14:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:14:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:14:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1387 transitions. [2023-08-03 19:14:44,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971326164874552 [2023-08-03 19:14:44,462 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1387 transitions. [2023-08-03 19:14:44,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1387 transitions. [2023-08-03 19:14:44,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:14:44,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1387 transitions. [2023-08-03 19:14:44,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.4) internal successors, (1387), 5 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:44,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 558.0) internal successors, (3348), 6 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:44,475 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 558.0) internal successors, (3348), 6 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:44,475 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 274 flow. Second operand 5 states and 1387 transitions. [2023-08-03 19:14:44,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 596 flow [2023-08-03 19:20:01,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 123 transitions, 570 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 19:20:01,300 INFO L231 Difference]: Finished difference. Result has 76 places, 89 transitions, 271 flow [2023-08-03 19:20:01,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, 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 19:20:01,300 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-03 19:20:01,301 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 89 transitions, 271 flow [2023-08-03 19:20:01,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.6) internal successors, (1288), 5 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:20:01,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:20:01,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:20:01,308 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 19:20:01,503 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 19:20:01,504 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 19:20:01,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:20:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1259227098, now seen corresponding path program 1 times [2023-08-03 19:20:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:20:01,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253816020] [2023-08-03 19:20:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:20:01,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:20:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:20:01,603 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 19:20:01,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:20:01,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253816020] [2023-08-03 19:20:01,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253816020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:20:01,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:20:01,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:20:01,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991473322] [2023-08-03 19:20:01,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:20:01,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:20:01,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:20:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:20:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:20:01,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 558 [2023-08-03 19:20:01,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 89 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:20:01,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:20:01,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 558 [2023-08-03 19:20:01,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand