/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 INSUFFICIENT_FIRST -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 [2023-08-04 01:37:13,953 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:37:14,016 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:37:14,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:37:14,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:37:14,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:37:14,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:37:14,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:37:14,038 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:37:14,038 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:37:14,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:37:14,039 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:37:14,040 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:37:14,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:37:14,040 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:37:14,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:37:14,041 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:37:14,041 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:37:14,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:37:14,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:37:14,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:37:14,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:37:14,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:37:14,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:37:14,046 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:37:14,046 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:37:14,047 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:37:14,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:37:14,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:37:14,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:37:14,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:37:14,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:37:14,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:37:14,049 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:37:14,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:37:14,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:37:14,050 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:37:14,050 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:37:14,050 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:37:14,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:37:14,050 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:37:14,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:37:14,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:37:14,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:37:14,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:37:14,300 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:37:14,301 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:37:14,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i [2023-08-04 01:37:15,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:37:15,721 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:37:15,722 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i [2023-08-04 01:37:15,735 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e3b48cf8/728aa8b28a484992b6f09856b9419587/FLAG9b9ca32d9 [2023-08-04 01:37:15,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e3b48cf8/728aa8b28a484992b6f09856b9419587 [2023-08-04 01:37:15,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:37:15,757 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:37:15,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:37:15,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:37:15,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:37:15,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:37:15" (1/1) ... [2023-08-04 01:37:15,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b90473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:15, skipping insertion in model container [2023-08-04 01:37:15,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:37:15" (1/1) ... [2023-08-04 01:37:15,814 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:37:16,134 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] [2023-08-04 01:37:16,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:37:16,187 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:37:16,203 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:37:16,205 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:37:16,228 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-04 01:37:16,233 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] [2023-08-04 01:37:16,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:37:16,306 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:37:16,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16 WrapperNode [2023-08-04 01:37:16,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:37:16,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:37:16,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:37:16,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:37:16,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,338 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,361 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 185 [2023-08-04 01:37:16,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:37:16,362 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:37:16,362 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:37:16,362 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:37:16,371 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,376 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,377 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,394 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:37:16,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:37:16,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:37:16,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:37:16,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (1/1) ... [2023-08-04 01:37:16,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:37:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:37:16,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 01:37:16,449 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 [2023-08-04 01:37:16,473 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:37:16,473 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:37:16,473 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:37:16,474 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:37:16,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:37:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:37:16,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:37:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:37:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 01:37:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:37:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:37:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:37:16,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:37:16,479 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 01:37:16,661 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:37:16,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:37:16,918 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:37:16,926 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:37:16,926 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 01:37:16,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:37:16 BoogieIcfgContainer [2023-08-04 01:37:16,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:37:16,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:37:16,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:37:16,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:37:16,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:37:15" (1/3) ... [2023-08-04 01:37:16,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db55b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:37:16, skipping insertion in model container [2023-08-04 01:37:16,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:37:16" (2/3) ... [2023-08-04 01:37:16,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db55b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:37:16, skipping insertion in model container [2023-08-04 01:37:16,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:37:16" (3/3) ... [2023-08-04 01:37:16,935 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack-1_bound2.i [2023-08-04 01:37:16,942 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:37:16,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:37:16,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 01:37:16,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:37:17,036 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:37:17,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 01:37:17,166 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-04 01:37:17,166 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:37:17,187 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. [2023-08-04 01:37:17,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 01:37:17,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 185 transitions, 392 flow [2023-08-04 01:37:17,201 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:37:17,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-04 01:37:17,211 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-04 01:37:17,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 01:37:17,268 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-04 01:37:17,268 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:37:17,272 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. [2023-08-04 01:37:17,281 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-04 01:37:21,123 INFO L134 LiptonReduction]: Checked pairs total: 20837 [2023-08-04 01:37:21,123 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-04 01:37:21,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:37:21,143 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;@1a2f18bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:37:21,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:37:21,148 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:37:21,149 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-08-04 01:37:21,149 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:37:21,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:37:21,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:37:21,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:37:21,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:37:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash 743719019, now seen corresponding path program 1 times [2023-08-04 01:37:21,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:37:21,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559109234] [2023-08-04 01:37:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:37:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:37:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:37:21,272 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:37:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:37:21,320 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:37:21,321 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:37:21,322 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:37:21,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:37:21,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:37:21,324 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:37:21,327 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:37:21,327 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:37:21,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:37:21,376 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:37:21,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 01:37:21,544 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-04 01:37:21,545 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:37:21,559 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. [2023-08-04 01:37:21,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 01:37:21,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 291 transitions, 630 flow [2023-08-04 01:37:21,568 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:37:21,568 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-04 01:37:21,569 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-04 01:37:21,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 01:37:21,722 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-04 01:37:21,722 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:37:21,737 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. [2023-08-04 01:37:21,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-04 01:37:26,472 INFO L134 LiptonReduction]: Checked pairs total: 85759 [2023-08-04 01:37:26,472 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-04 01:37:26,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:37:26,482 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;@1a2f18bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:37:26,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:37:26,494 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:37:26,494 INFO L124 PetriNetUnfolderBase]: 10/92 cut-off events. [2023-08-04 01:37:26,494 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 01:37:26,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:37:26,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:37:26,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:37:26,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:37:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -513748122, now seen corresponding path program 1 times [2023-08-04 01:37:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:37:26,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867238753] [2023-08-04 01:37:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:37:26,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:37:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:37:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:37:26,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:37:26,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867238753] [2023-08-04 01:37:26,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867238753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:37:26,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261905395] [2023-08-04 01:37:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:37:26,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:37:26,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:37:26,718 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) [2023-08-04 01:37:26,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 01:37:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:37:26,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:37:26,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:37:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:37:26,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:37:26,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261905395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:37:26,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:37:26,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:37:26,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116232064] [2023-08-04 01:37:26,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:37:26,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:37:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:37:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:37:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:37:26,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 558 [2023-08-04 01:37:26,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 210 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) [2023-08-04 01:37:26,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:37:26,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 558 [2023-08-04 01:37:26,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:38:06,374 INFO L124 PetriNetUnfolderBase]: 523762/661001 cut-off events. [2023-08-04 01:38:06,375 INFO L125 PetriNetUnfolderBase]: For 30432/30432 co-relation queries the response was YES. [2023-08-04 01:38:07,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327543 conditions, 661001 events. 523762/661001 cut-off events. For 30432/30432 co-relation queries the response was YES. Maximal size of possible extension queue 14157. Compared 4088056 event pairs, 201068 based on Foata normal form. 0/458252 useless extension candidates. Maximal degree in co-relation 189064. Up to 650750 conditions per place. [2023-08-04 01:38:08,634 INFO L140 encePairwiseOnDemand]: 554/558 looper letters, 86 selfloop transitions, 5 changer transitions 17/114 dead transitions. [2023-08-04 01:38:08,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 484 flow [2023-08-04 01:38:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:38:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:38:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1387 transitions. [2023-08-04 01:38:08,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971326164874552 [2023-08-04 01:38:08,654 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1387 transitions. [2023-08-04 01:38:08,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1387 transitions. [2023-08-04 01:38:08,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:38:08,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1387 transitions. [2023-08-04 01:38:08,672 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) [2023-08-04 01:38:08,682 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) [2023-08-04 01:38:08,684 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) [2023-08-04 01:38:08,686 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 210 flow. Second operand 5 states and 1387 transitions. [2023-08-04 01:38:08,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 484 flow [2023-08-04 01:38:08,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:38:08,707 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 167 flow [2023-08-04 01:38:08,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2023-08-04 01:38:08,712 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-08-04 01:38:08,712 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 167 flow [2023-08-04 01:38:08,713 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) [2023-08-04 01:38:08,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:08,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:38:08,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 01:38:08,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:38:08,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:08,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1728045666, now seen corresponding path program 1 times [2023-08-04 01:38:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:08,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261351260] [2023-08-04 01:38:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:08,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:38:08,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261351260] [2023-08-04 01:38:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261351260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:38:08,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:38:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:38:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512593342] [2023-08-04 01:38:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:38:08,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:38:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:38:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:38:08,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 558 [2023-08-04 01:38:08,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:08,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:08,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 558 [2023-08-04 01:38:08,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:38:19,002 INFO L124 PetriNetUnfolderBase]: 157620/198637 cut-off events. [2023-08-04 01:38:19,002 INFO L125 PetriNetUnfolderBase]: For 3735/3735 co-relation queries the response was YES. [2023-08-04 01:38:19,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399578 conditions, 198637 events. 157620/198637 cut-off events. For 3735/3735 co-relation queries the response was YES. Maximal size of possible extension queue 5137. Compared 1097742 event pairs, 87084 based on Foata normal form. 1/147395 useless extension candidates. Maximal degree in co-relation 47744. Up to 196589 conditions per place. [2023-08-04 01:38:19,907 INFO L140 encePairwiseOnDemand]: 555/558 looper letters, 68 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 01:38:19,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 326 flow [2023-08-04 01:38:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:38:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:38:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-08-04 01:38:19,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502389486260454 [2023-08-04 01:38:19,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-08-04 01:38:19,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-08-04 01:38:19,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:38:19,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-08-04 01:38:19,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:19,917 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) [2023-08-04 01:38:19,918 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) [2023-08-04 01:38:19,918 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 167 flow. Second operand 3 states and 841 transitions. [2023-08-04 01:38:19,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 326 flow [2023-08-04 01:38:19,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 76 transitions, 323 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:38:19,925 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 163 flow [2023-08-04 01:38:19,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-08-04 01:38:19,926 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-08-04 01:38:19,927 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 163 flow [2023-08-04 01:38:19,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:19,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:19,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:38:19,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:38:19,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:19,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:19,928 INFO L85 PathProgramCache]: Analyzing trace with hash 243062321, now seen corresponding path program 1 times [2023-08-04 01:38:19,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:19,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111061612] [2023-08-04 01:38:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:19,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:38:19,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111061612] [2023-08-04 01:38:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111061612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:38:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075589769] [2023-08-04 01:38:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:19,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:38:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:38:19,977 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) [2023-08-04 01:38:19,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 01:38:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:20,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:38:20,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:38:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:38:20,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:38:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:38:20,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075589769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:38:20,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:38:20,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:38:20,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50897323] [2023-08-04 01:38:20,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:38:20,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:38:20,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:38:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:38:20,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 558 [2023-08-04 01:38:20,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 258.6) internal successors, (1293), 5 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:20,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:20,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 558 [2023-08-04 01:38:20,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:38:29,506 INFO L124 PetriNetUnfolderBase]: 145768/182429 cut-off events. [2023-08-04 01:38:29,506 INFO L125 PetriNetUnfolderBase]: For 2781/2781 co-relation queries the response was YES. [2023-08-04 01:38:29,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366839 conditions, 182429 events. 145768/182429 cut-off events. For 2781/2781 co-relation queries the response was YES. Maximal size of possible extension queue 4969. Compared 980966 event pairs, 50382 based on Foata normal form. 9/135395 useless extension candidates. Maximal degree in co-relation 47683. Up to 180631 conditions per place. [2023-08-04 01:38:30,342 INFO L140 encePairwiseOnDemand]: 555/558 looper letters, 86 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-08-04 01:38:30,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 400 flow [2023-08-04 01:38:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:38:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:38:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1114 transitions. [2023-08-04 01:38:30,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49910394265232977 [2023-08-04 01:38:30,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1114 transitions. [2023-08-04 01:38:30,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1114 transitions. [2023-08-04 01:38:30,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:38:30,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1114 transitions. [2023-08-04 01:38:30,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:30,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 558.0) internal successors, (2790), 5 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:30,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 558.0) internal successors, (2790), 5 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:30,355 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 163 flow. Second operand 4 states and 1114 transitions. [2023-08-04 01:38:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 400 flow [2023-08-04 01:38:30,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:38:30,357 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 160 flow [2023-08-04 01:38:30,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-08-04 01:38:30,358 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2023-08-04 01:38:30,358 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 160 flow [2023-08-04 01:38:30,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.6) internal successors, (1293), 5 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:30,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:30,359 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:38:30,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 01:38:30,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 01:38:30,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:38:30,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash -443870177, now seen corresponding path program 1 times [2023-08-04 01:38:30,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:30,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861842969] [2023-08-04 01:38:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:30,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:38:30,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:30,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861842969] [2023-08-04 01:38:30,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861842969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:38:30,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136480969] [2023-08-04 01:38:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:30,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:38:30,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:38:30,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:38:30,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 01:38:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:30,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:38:30,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:38:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:38:30,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:38:30,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136480969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:38:30,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:38:30,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:38:30,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408463974] [2023-08-04 01:38:30,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:38:30,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:38:30,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:30,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:38:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:38:30,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 558 [2023-08-04 01:38:30,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 258.6) internal successors, (1293), 5 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:30,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:30,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 558 [2023-08-04 01:38:30,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:38:36,705 INFO L124 PetriNetUnfolderBase]: 96898/122393 cut-off events. [2023-08-04 01:38:36,705 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2023-08-04 01:38:36,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246836 conditions, 122393 events. 96898/122393 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 3751. Compared 640879 event pairs, 232 based on Foata normal form. 10692/100861 useless extension candidates. Maximal degree in co-relation 80414. Up to 59562 conditions per place. [2023-08-04 01:38:36,938 INFO L140 encePairwiseOnDemand]: 555/558 looper letters, 0 selfloop transitions, 0 changer transitions 165/165 dead transitions. [2023-08-04 01:38:36,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 165 transitions, 680 flow [2023-08-04 01:38:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:38:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:38:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1440 transitions. [2023-08-04 01:38:36,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2023-08-04 01:38:36,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1440 transitions. [2023-08-04 01:38:36,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1440 transitions. [2023-08-04 01:38:36,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:38:36,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1440 transitions. [2023-08-04 01:38:36,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:36,951 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) [2023-08-04 01:38:36,953 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) [2023-08-04 01:38:36,953 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 160 flow. Second operand 5 states and 1440 transitions. [2023-08-04 01:38:36,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 165 transitions, 680 flow [2023-08-04 01:38:37,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 165 transitions, 673 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:38:37,070 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-04 01:38:37,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-04 01:38:37,071 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-08-04 01:38:37,071 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-04 01:38:37,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.6) internal successors, (1293), 5 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:38:37,072 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:38:37,073 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:38:37,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 01:38:37,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:38:37,277 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:38:37,278 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:38:37,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 01:38:37,394 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-04 01:38:37,394 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:38:37,403 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. [2023-08-04 01:38:37,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 01:38:37,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 291 transitions, 630 flow [2023-08-04 01:38:37,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:38:37,409 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-04 01:38:37,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-04 01:38:37,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 01:38:37,524 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-04 01:38:37,524 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:38:37,538 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. [2023-08-04 01:38:37,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-04 01:38:42,046 INFO L134 LiptonReduction]: Checked pairs total: 86022 [2023-08-04 01:38:42,046 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-08-04 01:38:42,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:38:42,048 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;@1a2f18bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:38:42,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 01:38:42,051 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:38:42,051 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-04 01:38:42,051 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 01:38:42,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:38:42,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:38:42,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:38:42,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:38:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash 427762077, now seen corresponding path program 1 times [2023-08-04 01:38:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:38:42,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802049667] [2023-08-04 01:38:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:38:42,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:38:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:38:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:38:42,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:38:42,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802049667] [2023-08-04 01:38:42,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802049667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:38:42,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:38:42,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:38:42,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251320301] [2023-08-04 01:38:42,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:38:42,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:38:42,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:38:42,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:38:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:38:42,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 556 [2023-08-04 01:38:42,132 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) [2023-08-04 01:38:42,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:38:42,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 556 [2023-08-04 01:38:42,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:51,667 INFO L124 PetriNetUnfolderBase]: 965719/1229266 cut-off events. [2023-08-04 01:39:51,667 INFO L125 PetriNetUnfolderBase]: For 63146/63146 co-relation queries the response was YES. [2023-08-04 01:39:53,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472061 conditions, 1229266 events. 965719/1229266 cut-off events. For 63146/63146 co-relation queries the response was YES. Maximal size of possible extension queue 22880. Compared 8096356 event pairs, 352814 based on Foata normal form. 0/887715 useless extension candidates. Maximal degree in co-relation 1743690. Up to 716661 conditions per place. [2023-08-04 01:39:57,740 INFO L140 encePairwiseOnDemand]: 543/556 looper letters, 131 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2023-08-04 01:39:57,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 146 transitions, 653 flow [2023-08-04 01:39:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:39:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:39:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-08-04 01:39:57,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323741007194245 [2023-08-04 01:39:57,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-08-04 01:39:57,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-08-04 01:39:57,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:39:57,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-08-04 01:39:57,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:57,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 556.0) internal successors, (2224), 4 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:57,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 556.0) internal successors, (2224), 4 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:39:57,749 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 210 flow. Second operand 3 states and 888 transitions. [2023-08-04 01:39:57,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 146 transitions, 653 flow [2023-08-04 01:39:57,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 146 transitions, 653 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:39:57,803 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 274 flow [2023-08-04 01:39:57,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=556, 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} [2023-08-04 01:39:57,806 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-04 01:39:57,806 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 274 flow [2023-08-04 01:39:57,807 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) [2023-08-04 01:39:57,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:57,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:39:57,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:39:57,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:39:57,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1604629545, now seen corresponding path program 1 times [2023-08-04 01:39:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:57,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69784951] [2023-08-04 01:39:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:39:57,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:57,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69784951] [2023-08-04 01:39:57,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69784951] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:57,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:39:57,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:39:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322325597] [2023-08-04 01:39:57,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:39:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:39:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:39:57,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 556 [2023-08-04 01:39:57,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 274 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) [2023-08-04 01:39:57,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:57,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 556 [2023-08-04 01:39:57,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:41:28,604 INFO L124 PetriNetUnfolderBase]: 1064491/1358911 cut-off events. [2023-08-04 01:41:28,605 INFO L125 PetriNetUnfolderBase]: For 297996/297996 co-relation queries the response was YES. [2023-08-04 01:41:32,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2989532 conditions, 1358911 events. 1064491/1358911 cut-off events. For 297996/297996 co-relation queries the response was YES. Maximal size of possible extension queue 25779. Compared 9276609 event pairs, 611233 based on Foata normal form. 0/1064221 useless extension candidates. Maximal degree in co-relation 2116863. Up to 1214158 conditions per place. [2023-08-04 01:41:40,048 INFO L140 encePairwiseOnDemand]: 553/556 looper letters, 141 selfloop transitions, 3 changer transitions 0/152 dead transitions. [2023-08-04 01:41:40,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 152 transitions, 763 flow [2023-08-04 01:41:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:41:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:41:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 905 transitions. [2023-08-04 01:41:40,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425659472422062 [2023-08-04 01:41:40,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 905 transitions. [2023-08-04 01:41:40,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 905 transitions. [2023-08-04 01:41:40,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:41:40,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 905 transitions. [2023-08-04 01:41:40,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:40,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 556.0) internal successors, (2224), 4 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:40,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 556.0) internal successors, (2224), 4 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:40,059 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 274 flow. Second operand 3 states and 905 transitions. [2023-08-04 01:41:40,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 152 transitions, 763 flow [2023-08-04 01:41:41,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 152 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:41:41,460 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 275 flow [2023-08-04 01:41:41,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=556, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2023-08-04 01:41:41,461 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2023-08-04 01:41:41,462 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 275 flow [2023-08-04 01:41:41,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-04 01:41:41,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:41:41,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:41:41,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 01:41:41,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:41:41,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:41:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash -529235596, now seen corresponding path program 1 times [2023-08-04 01:41:41,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:41:41,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019147571] [2023-08-04 01:41:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:41:41,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:41:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:41:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:41:41,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:41:41,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019147571] [2023-08-04 01:41:41,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019147571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:41:41,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227066690] [2023-08-04 01:41:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:41:41,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:41:41,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:41:41,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:41:41,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 01:41:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:41:41,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:41:41,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:41:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:41:41,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:41:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:41:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227066690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:41:41,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:41:41,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 01:41:41,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851542474] [2023-08-04 01:41:41,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:41:41,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 01:41:41,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:41:41,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 01:41:41,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 01:41:42,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 556 [2023-08-04 01:41:42,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 275 flow. Second operand has 10 states, 10 states have (on average 246.7) internal successors, (2467), 10 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:41:42,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:41:42,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 556 [2023-08-04 01:41:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand