/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-wmm_safe036_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:16:42,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:16:42,948 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:16:42,952 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:16:42,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:16:42,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:16:42,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:16:42,975 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:16:42,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:16:42,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:16:42,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:16:42,977 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:16:42,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:16:42,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:16:42,978 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:16:42,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:16:42,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:16:42,979 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:16:42,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:16:42,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:16:42,980 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:16:42,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:16:42,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:16:42,981 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:16:42,981 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:16:42,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:16:42,982 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:16:42,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:16:42,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:16:42,983 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:16:42,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:16:42,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:16:42,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:16:42,984 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:16:42,984 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:16:42,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:16:42,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:16:42,985 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:16:42,986 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:16:42,986 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:16:42,986 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:16:42,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:16:43,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:16:43,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:16:43,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:16:43,174 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:16:43,174 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:16:43,175 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe036_bound2.i [2023-08-04 01:16:44,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:16:44,571 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:16:44,572 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe036_bound2.i [2023-08-04 01:16:44,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f1ff281c/ff024ea385024a6f954c94532218bcd5/FLAG93f8d8b95 [2023-08-04 01:16:44,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f1ff281c/ff024ea385024a6f954c94532218bcd5 [2023-08-04 01:16:44,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:16:44,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:16:44,619 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:16:44,619 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:16:44,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:16:44,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:16:44" (1/1) ... [2023-08-04 01:16:44,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d369789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:44, skipping insertion in model container [2023-08-04 01:16:44,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:16:44" (1/1) ... [2023-08-04 01:16:44,667 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:16:44,814 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-wmm_safe036_bound2.i[941,954] [2023-08-04 01:16:44,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:16:45,000 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:16:45,011 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-wmm_safe036_bound2.i[941,954] [2023-08-04 01:16:45,033 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:16:45,035 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:16:45,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:16:45,081 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:16:45,081 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:16:45,087 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:16:45,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45 WrapperNode [2023-08-04 01:16:45,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:16:45,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:16:45,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:16:45,088 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:16:45,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,140 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-08-04 01:16:45,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:16:45,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:16:45,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:16:45,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:16:45,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,157 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,162 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:16:45,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:16:45,166 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:16:45,166 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:16:45,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (1/1) ... [2023-08-04 01:16:45,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:16:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:16:45,202 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 01:16:45,224 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 01:16:45,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:16:45,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:16:45,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:16:45,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:16:45,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:16:45,240 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 01:16:45,241 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 01:16:45,241 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 01:16:45,241 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 01:16:45,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:16:45,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:16:45,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:16:45,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:16:45,243 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 01:16:45,392 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:16:45,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:16:45,586 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:16:45,591 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:16:45,592 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 01:16:45,593 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:16:45 BoogieIcfgContainer [2023-08-04 01:16:45,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:16:45,595 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:16:45,595 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:16:45,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:16:45,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:16:44" (1/3) ... [2023-08-04 01:16:45,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d88fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:16:45, skipping insertion in model container [2023-08-04 01:16:45,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:16:45" (2/3) ... [2023-08-04 01:16:45,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d88fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:16:45, skipping insertion in model container [2023-08-04 01:16:45,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:16:45" (3/3) ... [2023-08-04 01:16:45,600 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe036_bound2.i [2023-08-04 01:16:45,608 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:16:45,616 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:16:45,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:16:45,617 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:16:45,666 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:16:45,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 01:16:45,749 INFO L124 PetriNetUnfolderBase]: 14/193 cut-off events. [2023-08-04 01:16:45,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:16:45,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 193 events. 14/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 561 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-04 01:16:45,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 01:16:45,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 122 flow [2023-08-04 01:16:45,760 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:16:45,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 56 transitions, 122 flow [2023-08-04 01:16:45,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 56 transitions, 122 flow [2023-08-04 01:16:45,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 122 flow [2023-08-04 01:16:45,788 INFO L124 PetriNetUnfolderBase]: 2/89 cut-off events. [2023-08-04 01:16:45,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:16:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-04 01:16:45,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 492 [2023-08-04 01:16:47,272 INFO L134 LiptonReduction]: Checked pairs total: 910 [2023-08-04 01:16:47,272 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-04 01:16:47,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:16:47,297 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;@571cb28b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:16:47,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:16:47,302 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:16:47,302 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 01:16:47,302 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:16:47,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:47,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 01:16:47,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:16:47,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash 267070751, now seen corresponding path program 1 times [2023-08-04 01:16:47,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476262161] [2023-08-04 01:16:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:16:47,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:47,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476262161] [2023-08-04 01:16:47,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476262161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:47,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:16:47,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:16:47,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937351148] [2023-08-04 01:16:47,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:47,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:16:47,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:16:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:16:47,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 127 [2023-08-04 01:16:47,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:16:47,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:47,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 127 [2023-08-04 01:16:47,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:47,689 INFO L124 PetriNetUnfolderBase]: 24/72 cut-off events. [2023-08-04 01:16:47,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:16:47,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 72 events. 24/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 234 event pairs, 6 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 134. Up to 52 conditions per place. [2023-08-04 01:16:47,693 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 12 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-04 01:16:47,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 74 flow [2023-08-04 01:16:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:16:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:16:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-04 01:16:47,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984251968503937 [2023-08-04 01:16:47,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-04 01:16:47,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-04 01:16:47,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:47,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-04 01:16:47,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 01:16:47,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 01:16:47,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 01:16:47,725 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 40 flow. Second operand 3 states and 228 transitions. [2023-08-04 01:16:47,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 74 flow [2023-08-04 01:16:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:16:47,728 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 48 flow [2023-08-04 01:16:47,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-04 01:16:47,733 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-04 01:16:47,733 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 48 flow [2023-08-04 01:16:47,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:16:47,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:47,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:16:47,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:16:47,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:16:47,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash -311608487, now seen corresponding path program 1 times [2023-08-04 01:16:47,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:47,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735187425] [2023-08-04 01:16:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:47,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:16:47,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:16:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:16:47,783 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:16:47,783 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:16:47,784 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:16:47,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:16:47,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 01:16:47,786 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 01:16:47,788 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:16:47,788 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:16:47,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:16:47,804 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:16:47,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 01:16:47,853 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 01:16:47,853 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:16:47,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 412 events. 30/412 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1732 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 18 conditions per place. [2023-08-04 01:16:47,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 01:16:47,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 70 transitions, 164 flow [2023-08-04 01:16:47,856 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:16:47,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 70 transitions, 164 flow [2023-08-04 01:16:47,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 70 transitions, 164 flow [2023-08-04 01:16:47,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 164 flow [2023-08-04 01:16:47,875 INFO L124 PetriNetUnfolderBase]: 3/178 cut-off events. [2023-08-04 01:16:47,875 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:16:47,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 178 events. 3/178 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 443 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 140. Up to 9 conditions per place. [2023-08-04 01:16:47,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-04 01:16:49,242 INFO L134 LiptonReduction]: Checked pairs total: 3084 [2023-08-04 01:16:49,243 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-08-04 01:16:49,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:16:49,246 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;@571cb28b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:16:49,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:16:49,249 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:16:49,249 INFO L124 PetriNetUnfolderBase]: 0/32 cut-off events. [2023-08-04 01:16:49,249 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 01:16:49,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:49,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:16:49,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:16:49,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash 59902756, now seen corresponding path program 1 times [2023-08-04 01:16:49,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:49,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285637302] [2023-08-04 01:16:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:16:49,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:49,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285637302] [2023-08-04 01:16:49,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285637302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:49,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:16:49,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:16:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533286519] [2023-08-04 01:16:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:49,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:16:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:16:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:16:49,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 145 [2023-08-04 01:16:49,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 01:16:49,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:49,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 145 [2023-08-04 01:16:49,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:49,410 INFO L124 PetriNetUnfolderBase]: 624/1162 cut-off events. [2023-08-04 01:16:49,410 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 01:16:49,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1162 events. 624/1162 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6626 event pairs, 402 based on Foata normal form. 0/1134 useless extension candidates. Maximal degree in co-relation 664. Up to 958 conditions per place. [2023-08-04 01:16:49,419 INFO L140 encePairwiseOnDemand]: 142/145 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 01:16:49,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 124 flow [2023-08-04 01:16:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:16:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:16:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-04 01:16:49,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6229885057471264 [2023-08-04 01:16:49,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-04 01:16:49,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-04 01:16:49,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:49,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-04 01:16:49,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 01:16:49,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:16:49,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:16:49,425 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 271 transitions. [2023-08-04 01:16:49,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 124 flow [2023-08-04 01:16:49,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 120 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 01:16:49,427 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 82 flow [2023-08-04 01:16:49,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 01:16:49,428 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 01:16:49,428 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 82 flow [2023-08-04 01:16:49,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 01:16:49,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:49,429 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:16:49,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:16:49,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:16:49,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1112517976, now seen corresponding path program 1 times [2023-08-04 01:16:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:49,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770554326] [2023-08-04 01:16:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:49,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:49,528 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 01:16:49,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770554326] [2023-08-04 01:16:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770554326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:16:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020431804] [2023-08-04 01:16:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:49,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:49,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:16:49,532 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 01:16:49,542 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 01:16:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:49,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:16:49,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:16:49,657 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 01:16:49,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:16:49,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020431804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:49,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:16:49,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:16:49,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117678626] [2023-08-04 01:16:49,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:49,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:16:49,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:49,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:16:49,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:16:49,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2023-08-04 01:16:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 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 01:16:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2023-08-04 01:16:49,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:49,815 INFO L124 PetriNetUnfolderBase]: 612/1129 cut-off events. [2023-08-04 01:16:49,816 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 01:16:49,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2285 conditions, 1129 events. 612/1129 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6363 event pairs, 240 based on Foata normal form. 9/1125 useless extension candidates. Maximal degree in co-relation 823. Up to 911 conditions per place. [2023-08-04 01:16:49,825 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 22 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-04 01:16:49,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 148 flow [2023-08-04 01:16:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:16:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:16:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 437 transitions. [2023-08-04 01:16:49,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027586206896551 [2023-08-04 01:16:49,827 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 437 transitions. [2023-08-04 01:16:49,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 437 transitions. [2023-08-04 01:16:49,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:49,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 437 transitions. [2023-08-04 01:16:49,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 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 01:16:49,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 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 01:16:49,832 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 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 01:16:49,832 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 82 flow. Second operand 5 states and 437 transitions. [2023-08-04 01:16:49,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 148 flow [2023-08-04 01:16:49,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:16:49,834 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 96 flow [2023-08-04 01:16:49,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-04 01:16:49,835 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-04 01:16:49,835 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 96 flow [2023-08-04 01:16:49,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 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 01:16:49,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:49,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:49,848 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 01:16:50,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:50,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:16:50,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1354335779, now seen corresponding path program 1 times [2023-08-04 01:16:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:50,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439529722] [2023-08-04 01:16:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:16:50,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:50,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439529722] [2023-08-04 01:16:50,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439529722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:16:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320747828] [2023-08-04 01:16:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:50,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:16:50,122 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 01:16:50,135 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 01:16:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:50,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:16:50,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:16:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:16:50,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:16:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:16:50,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320747828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:16:50,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:16:50,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:16:50,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776697720] [2023-08-04 01:16:50,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:16:50,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:16:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:16:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:16:50,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2023-08-04 01:16:50,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 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 01:16:50,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:50,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2023-08-04 01:16:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:50,391 INFO L124 PetriNetUnfolderBase]: 502/899 cut-off events. [2023-08-04 01:16:50,392 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-04 01:16:50,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 899 events. 502/899 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4655 event pairs, 180 based on Foata normal form. 3/892 useless extension candidates. Maximal degree in co-relation 651. Up to 727 conditions per place. [2023-08-04 01:16:50,397 INFO L140 encePairwiseOnDemand]: 142/145 looper letters, 22 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-08-04 01:16:50,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 154 flow [2023-08-04 01:16:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:16:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:16:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2023-08-04 01:16:50,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103448275862069 [2023-08-04 01:16:50,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2023-08-04 01:16:50,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2023-08-04 01:16:50,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:50,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2023-08-04 01:16:50,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 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 01:16:50,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 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 01:16:50,402 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 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 01:16:50,403 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 96 flow. Second operand 4 states and 354 transitions. [2023-08-04 01:16:50,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 154 flow [2023-08-04 01:16:50,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 149 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 01:16:50,404 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 89 flow [2023-08-04 01:16:50,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-08-04 01:16:50,405 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-04 01:16:50,405 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 89 flow [2023-08-04 01:16:50,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 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 01:16:50,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:50,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:50,415 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 01:16:50,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:50,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:16:50,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash 209853539, now seen corresponding path program 1 times [2023-08-04 01:16:50,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:50,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074626549] [2023-08-04 01:16:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:16:50,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074626549] [2023-08-04 01:16:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074626549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:50,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:16:50,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 01:16:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946575340] [2023-08-04 01:16:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:16:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:16:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:16:50,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 145 [2023-08-04 01:16:50,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 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 01:16:50,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:50,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 145 [2023-08-04 01:16:50,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:50,807 INFO L124 PetriNetUnfolderBase]: 286/544 cut-off events. [2023-08-04 01:16:50,807 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 01:16:50,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 544 events. 286/544 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2540 event pairs, 22 based on Foata normal form. 81/615 useless extension candidates. Maximal degree in co-relation 552. Up to 324 conditions per place. [2023-08-04 01:16:50,809 INFO L140 encePairwiseOnDemand]: 143/145 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-04 01:16:50,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 161 flow [2023-08-04 01:16:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:16:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:16:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2023-08-04 01:16:50,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2023-08-04 01:16:50,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2023-08-04 01:16:50,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2023-08-04 01:16:50,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:50,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2023-08-04 01:16:50,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 01:16:50,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 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 01:16:50,814 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 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 01:16:50,815 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 89 flow. Second operand 4 states and 360 transitions. [2023-08-04 01:16:50,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 161 flow [2023-08-04 01:16:50,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:16:50,816 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-04 01:16:50,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-04 01:16:50,817 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 01:16:50,817 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-04 01:16:50,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 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 01:16:50,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:16:50,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:16:50,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:16:50,818 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:16:50,819 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:16:50,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 01:16:50,850 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 01:16:50,850 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:16:50,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 412 events. 30/412 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1732 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 18 conditions per place. [2023-08-04 01:16:50,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 01:16:50,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 84 transitions, 184 flow [2023-08-04 01:16:50,852 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:16:50,852 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 84 transitions, 184 flow [2023-08-04 01:16:50,852 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 84 transitions, 184 flow [2023-08-04 01:16:50,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 84 transitions, 184 flow [2023-08-04 01:16:50,874 INFO L124 PetriNetUnfolderBase]: 21/318 cut-off events. [2023-08-04 01:16:50,875 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 01:16:50,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 318 events. 21/318 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1170 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 233. Up to 18 conditions per place. [2023-08-04 01:16:50,879 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-08-04 01:16:52,320 INFO L134 LiptonReduction]: Checked pairs total: 4205 [2023-08-04 01:16:52,320 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-04 01:16:52,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:16:52,324 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;@571cb28b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:16:52,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:16:52,326 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:16:52,326 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-04 01:16:52,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:16:52,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:52,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 01:16:52,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:16:52,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:52,327 INFO L85 PathProgramCache]: Analyzing trace with hash 15473530, now seen corresponding path program 1 times [2023-08-04 01:16:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:52,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972351882] [2023-08-04 01:16:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:52,367 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 01:16:52,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:52,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972351882] [2023-08-04 01:16:52,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972351882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:52,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:16:52,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:16:52,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911523982] [2023-08-04 01:16:52,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:52,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:16:52,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:52,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:16:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:16:52,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 161 [2023-08-04 01:16:52,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:16:52,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:52,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 161 [2023-08-04 01:16:52,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:52,576 INFO L124 PetriNetUnfolderBase]: 1674/2803 cut-off events. [2023-08-04 01:16:52,576 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-04 01:16:52,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 2803 events. 1674/2803 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16499 event pairs, 1140 based on Foata normal form. 0/2610 useless extension candidates. Maximal degree in co-relation 1555. Up to 2476 conditions per place. [2023-08-04 01:16:52,591 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 01:16:52,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 124 flow [2023-08-04 01:16:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:16:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:16:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-04 01:16:52,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693581780538303 [2023-08-04 01:16:52,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-04 01:16:52,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-04 01:16:52,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:52,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-04 01:16:52,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 01:16:52,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 01:16:52,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 01:16:52,595 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 70 flow. Second operand 3 states and 275 transitions. [2023-08-04 01:16:52,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 124 flow [2023-08-04 01:16:52,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:16:52,596 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 80 flow [2023-08-04 01:16:52,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-04 01:16:52,597 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 01:16:52,597 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 80 flow [2023-08-04 01:16:52,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:16:52,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:52,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:52,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 01:16:52,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:16:52,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1356486942, now seen corresponding path program 1 times [2023-08-04 01:16:52,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:52,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125939501] [2023-08-04 01:16:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:52,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:16:52,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125939501] [2023-08-04 01:16:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125939501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:16:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707033256] [2023-08-04 01:16:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:52,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:52,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:16:52,646 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 01:16:52,648 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 01:16:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:52,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:16:52,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:16:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:16:52,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:16:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707033256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:52,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:16:52,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:16:52,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964813658] [2023-08-04 01:16:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:52,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:16:52,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:16:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:16:52,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 161 [2023-08-04 01:16:52,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 01:16:52,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:52,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 161 [2023-08-04 01:16:52,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:52,903 INFO L124 PetriNetUnfolderBase]: 1646/2693 cut-off events. [2023-08-04 01:16:52,903 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 01:16:52,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 2693 events. 1646/2693 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15441 event pairs, 1120 based on Foata normal form. 0/2536 useless extension candidates. Maximal degree in co-relation 5265. Up to 2299 conditions per place. [2023-08-04 01:16:52,918 INFO L140 encePairwiseOnDemand]: 158/161 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 01:16:52,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 154 flow [2023-08-04 01:16:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:16:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:16:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-04 01:16:52,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755693581780539 [2023-08-04 01:16:52,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-04 01:16:52,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-04 01:16:52,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:52,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-04 01:16:52,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:16:52,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 01:16:52,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 01:16:52,923 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 80 flow. Second operand 3 states and 278 transitions. [2023-08-04 01:16:52,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 154 flow [2023-08-04 01:16:52,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:16:52,924 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 90 flow [2023-08-04 01:16:52,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 01:16:52,925 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-04 01:16:52,925 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 90 flow [2023-08-04 01:16:52,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 01:16:52,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:52,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:52,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 01:16:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:53,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:16:53,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1268888067, now seen corresponding path program 1 times [2023-08-04 01:16:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:53,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34733214] [2023-08-04 01:16:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:53,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:16:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:53,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34733214] [2023-08-04 01:16:53,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34733214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:16:53,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102886613] [2023-08-04 01:16:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:53,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:53,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:16:53,180 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 01:16:53,203 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 01:16:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:53,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:16:53,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:16:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:16:53,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:16:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:16:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102886613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:16:53,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:16:53,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 01:16:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877470183] [2023-08-04 01:16:53,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:16:53,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:16:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:16:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:16:53,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 161 [2023-08-04 01:16:53,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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 01:16:53,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:53,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 161 [2023-08-04 01:16:53,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:53,438 INFO L124 PetriNetUnfolderBase]: 1336/2141 cut-off events. [2023-08-04 01:16:53,439 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-04 01:16:53,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4466 conditions, 2141 events. 1336/2141 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11336 event pairs, 564 based on Foata normal form. 3/2134 useless extension candidates. Maximal degree in co-relation 1599. Up to 1882 conditions per place. [2023-08-04 01:16:53,450 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 26 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2023-08-04 01:16:53,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 166 flow [2023-08-04 01:16:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:16:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:16:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-04 01:16:53,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559006211180124 [2023-08-04 01:16:53,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-04 01:16:53,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-04 01:16:53,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:53,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-04 01:16:53,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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 01:16:53,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 01:16:53,454 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 01:16:53,455 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 90 flow. Second operand 4 states and 358 transitions. [2023-08-04 01:16:53,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 166 flow [2023-08-04 01:16:53,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:16:53,456 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 102 flow [2023-08-04 01:16:53,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2023-08-04 01:16:53,457 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2023-08-04 01:16:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 102 flow [2023-08-04 01:16:53,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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 01:16:53,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:53,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:53,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 01:16:53,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:53,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:16:53,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1911775876, now seen corresponding path program 1 times [2023-08-04 01:16:53,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:53,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417760023] [2023-08-04 01:16:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:53,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:16:53,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:53,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417760023] [2023-08-04 01:16:53,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417760023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:16:53,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379647185] [2023-08-04 01:16:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:53,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:53,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:16:53,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:16:53,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 01:16:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:53,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:16:53,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:16:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:16:53,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:16:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:16:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379647185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:16:53,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:16:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:16:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114315444] [2023-08-04 01:16:53,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:16:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:16:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:16:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:16:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 161 [2023-08-04 01:16:53,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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 01:16:53,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:53,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 161 [2023-08-04 01:16:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:53,977 INFO L124 PetriNetUnfolderBase]: 1216/1861 cut-off events. [2023-08-04 01:16:53,977 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 01:16:53,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1861 events. 1216/1861 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9168 event pairs, 400 based on Foata normal form. 27/1878 useless extension candidates. Maximal degree in co-relation 1421. Up to 943 conditions per place. [2023-08-04 01:16:53,987 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 34 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2023-08-04 01:16:53,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 210 flow [2023-08-04 01:16:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:16:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:16:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-04 01:16:53,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2023-08-04 01:16:53,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-04 01:16:53,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-04 01:16:53,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:53,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-04 01:16:53,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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 01:16:53,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 01:16:53,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 01:16:53,993 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 102 flow. Second operand 4 states and 366 transitions. [2023-08-04 01:16:53,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 210 flow [2023-08-04 01:16:53,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 203 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:16:53,995 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 109 flow [2023-08-04 01:16:53,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 01:16:53,996 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 01:16:53,996 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 109 flow [2023-08-04 01:16:53,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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 01:16:53,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:53,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:54,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 01:16:54,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 01:16:54,203 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:16:54,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1664122848, now seen corresponding path program 1 times [2023-08-04 01:16:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:54,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223114695] [2023-08-04 01:16:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:54,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:16:54,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:54,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223114695] [2023-08-04 01:16:54,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223114695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:16:54,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:16:54,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:16:54,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330680182] [2023-08-04 01:16:54,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:16:54,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:16:54,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:16:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:16:54,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 161 [2023-08-04 01:16:54,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 01:16:54,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:54,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 161 [2023-08-04 01:16:54,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:54,487 INFO L124 PetriNetUnfolderBase]: 872/1342 cut-off events. [2023-08-04 01:16:54,487 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-04 01:16:54,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3283 conditions, 1342 events. 872/1342 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5604 event pairs, 213 based on Foata normal form. 16/1353 useless extension candidates. Maximal degree in co-relation 2094. Up to 1109 conditions per place. [2023-08-04 01:16:54,494 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 35 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-04 01:16:54,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 268 flow [2023-08-04 01:16:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:16:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:16:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-04 01:16:54,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5859213250517599 [2023-08-04 01:16:54,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-04 01:16:54,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-04 01:16:54,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:54,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-04 01:16:54,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 01:16:54,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 01:16:54,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 01:16:54,498 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 109 flow. Second operand 3 states and 283 transitions. [2023-08-04 01:16:54,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 268 flow [2023-08-04 01:16:54,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 254 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 01:16:54,500 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 135 flow [2023-08-04 01:16:54,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-08-04 01:16:54,501 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 01:16:54,501 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 135 flow [2023-08-04 01:16:54,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 01:16:54,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:54,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:54,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 01:16:54,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:16:54,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1408836463, now seen corresponding path program 1 times [2023-08-04 01:16:54,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:54,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273161688] [2023-08-04 01:16:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:54,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 01:16:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:16:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273161688] [2023-08-04 01:16:54,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273161688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:16:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577396846] [2023-08-04 01:16:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:54,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:54,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:16:54,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:16:54,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 01:16:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:16:54,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 01:16:54,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:16:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:16:54,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:16:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:16:55,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577396846] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:16:55,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:16:55,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-08-04 01:16:55,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403926437] [2023-08-04 01:16:55,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:16:55,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 01:16:55,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:16:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 01:16:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-04 01:16:55,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 161 [2023-08-04 01:16:55,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 135 flow. Second operand has 11 states, 11 states have (on average 77.18181818181819) internal successors, (849), 11 states have internal predecessors, (849), 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 01:16:55,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:16:55,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 161 [2023-08-04 01:16:55,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:16:55,709 INFO L124 PetriNetUnfolderBase]: 3274/4800 cut-off events. [2023-08-04 01:16:55,709 INFO L125 PetriNetUnfolderBase]: For 3936/3936 co-relation queries the response was YES. [2023-08-04 01:16:55,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12762 conditions, 4800 events. 3274/4800 cut-off events. For 3936/3936 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24673 event pairs, 170 based on Foata normal form. 258/5055 useless extension candidates. Maximal degree in co-relation 6610. Up to 1401 conditions per place. [2023-08-04 01:16:55,742 INFO L140 encePairwiseOnDemand]: 148/161 looper letters, 129 selfloop transitions, 100 changer transitions 0/231 dead transitions. [2023-08-04 01:16:55,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 231 transitions, 1292 flow [2023-08-04 01:16:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 01:16:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 01:16:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1464 transitions. [2023-08-04 01:16:55,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348922177566678 [2023-08-04 01:16:55,747 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1464 transitions. [2023-08-04 01:16:55,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1464 transitions. [2023-08-04 01:16:55,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:16:55,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1464 transitions. [2023-08-04 01:16:55,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 86.11764705882354) internal successors, (1464), 17 states have internal predecessors, (1464), 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 01:16:55,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 161.0) internal successors, (2898), 18 states have internal predecessors, (2898), 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 01:16:55,755 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 161.0) internal successors, (2898), 18 states have internal predecessors, (2898), 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 01:16:55,755 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 135 flow. Second operand 17 states and 1464 transitions. [2023-08-04 01:16:55,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 231 transitions, 1292 flow [2023-08-04 01:16:55,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 231 transitions, 1283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:16:55,762 INFO L231 Difference]: Finished difference. Result has 69 places, 144 transitions, 878 flow [2023-08-04 01:16:55,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=878, PETRI_PLACES=69, PETRI_TRANSITIONS=144} [2023-08-04 01:16:55,763 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 34 predicate places. [2023-08-04 01:16:55,763 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 144 transitions, 878 flow [2023-08-04 01:16:55,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.18181818181819) internal successors, (849), 11 states have internal predecessors, (849), 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 01:16:55,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:16:55,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:55,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 01:16:55,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:16:55,969 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:16:55,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:16:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1764166727, now seen corresponding path program 1 times [2023-08-04 01:16:55,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:16:55,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588139365] [2023-08-04 01:16:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:16:55,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:16:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:16:55,987 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:16:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:16:56,005 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:16:56,006 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:16:56,006 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 01:16:56,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 01:16:56,006 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:16:56,007 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-04 01:16:56,008 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 01:16:56,009 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 01:16:56,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 01:16:56 BasicIcfg [2023-08-04 01:16:56,053 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 01:16:56,054 INFO L158 Benchmark]: Toolchain (without parser) took 11439.96ms. Allocated memory was 580.9MB in the beginning and 698.4MB in the end (delta: 117.4MB). Free memory was 528.7MB in the beginning and 314.5MB in the end (delta: 214.2MB). Peak memory consumption was 332.8MB. Max. memory is 16.0GB. [2023-08-04 01:16:56,054 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 350.2MB. Free memory is still 301.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 01:16:56,054 INFO L158 Benchmark]: CACSL2BoogieTranslator took 468.80ms. Allocated memory is still 580.9MB. Free memory was 528.4MB in the beginning and 508.4MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 01:16:56,054 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.71ms. Allocated memory is still 580.9MB. Free memory was 508.4MB in the beginning and 506.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 01:16:56,055 INFO L158 Benchmark]: Boogie Preprocessor took 23.73ms. Allocated memory is still 580.9MB. Free memory was 506.3MB in the beginning and 504.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 01:16:56,055 INFO L158 Benchmark]: RCFGBuilder took 427.87ms. Allocated memory is still 580.9MB. Free memory was 504.8MB in the beginning and 541.7MB in the end (delta: -36.9MB). Peak memory consumption was 18.0MB. Max. memory is 16.0GB. [2023-08-04 01:16:56,055 INFO L158 Benchmark]: TraceAbstraction took 10458.20ms. Allocated memory was 580.9MB in the beginning and 698.4MB in the end (delta: 117.4MB). Free memory was 541.3MB in the beginning and 314.5MB in the end (delta: 226.8MB). Peak memory consumption was 344.2MB. Max. memory is 16.0GB. [2023-08-04 01:16:56,056 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 350.2MB. Free memory is still 301.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 468.80ms. Allocated memory is still 580.9MB. Free memory was 528.4MB in the beginning and 508.4MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.71ms. Allocated memory is still 580.9MB. Free memory was 508.4MB in the beginning and 506.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.73ms. Allocated memory is still 580.9MB. Free memory was 506.3MB in the beginning and 504.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 427.87ms. Allocated memory is still 580.9MB. Free memory was 504.8MB in the beginning and 541.7MB in the end (delta: -36.9MB). Peak memory consumption was 18.0MB. Max. memory is 16.0GB. * TraceAbstraction took 10458.20ms. Allocated memory was 580.9MB in the beginning and 698.4MB in the end (delta: 117.4MB). Free memory was 541.3MB in the beginning and 314.5MB in the end (delta: 226.8MB). Peak memory consumption was 344.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 60 PlacesBefore, 20 PlacesAfterwards, 56 TransitionsBefore, 15 TransitionsAfterwards, 492 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 45 TotalNumberOfCompositions, 910 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 514, independent: 468, independent conditional: 0, independent unconditional: 468, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 259, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 514, independent: 215, independent conditional: 0, independent unconditional: 215, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 259, unknown conditional: 0, unknown unconditional: 259] , Statistics on independence cache: Total cache size (in pairs): 28, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 78 PlacesBefore, 34 PlacesAfterwards, 70 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 49 TotalNumberOfCompositions, 3084 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1760, independent: 1663, independent conditional: 0, independent unconditional: 1663, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 677, independent: 658, independent conditional: 0, independent unconditional: 658, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1760, independent: 1005, independent conditional: 0, independent unconditional: 1005, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 677, unknown conditional: 0, unknown unconditional: 677] , Statistics on independence cache: Total cache size (in pairs): 101, Positive cache size: 92, Positive conditional cache size: 0, Positive unconditional cache size: 92, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 90 PlacesBefore, 35 PlacesAfterwards, 84 TransitionsBefore, 27 TransitionsAfterwards, 2016 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 65 TotalNumberOfCompositions, 4205 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1946, independent: 1838, independent conditional: 0, independent unconditional: 1838, dependent: 108, dependent conditional: 0, dependent unconditional: 108, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1042, independent: 1013, independent conditional: 0, independent unconditional: 1013, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1946, independent: 825, independent conditional: 0, independent unconditional: 825, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 1042, unknown conditional: 0, unknown unconditional: 1042] , Statistics on independence cache: Total cache size (in pairs): 88, Positive cache size: 77, Positive conditional cache size: 0, Positive unconditional cache size: 77, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p0_EAX = 0; [L712] 0 int __unbuffered_p1_EAX = 0; [L713] 0 _Bool main$tmp_guard0; [L714] 0 _Bool main$tmp_guard1; [L716] 0 int x = 0; [L718] 0 int y = 0; [L764] 0 pthread_t t2625[2]; [L765] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=0] [L765] COND TRUE 0 asdf<2 [L765] FCALL, FORK 0 pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0))=-3, t2625={5:0}, x=0, y=0] [L765] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=0] [L765] COND TRUE 0 asdf<2 [L722] 1 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L727] 1 __unbuffered_p0_EAX = x VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L765] FCALL, FORK 0 pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0))=-2, t2625={5:0}, x=0, y=1] [L765] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=1] [L722] 2 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L727] 2 __unbuffered_p0_EAX = x VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L765] COND FALSE 0 !(asdf<2) [L766] 0 pthread_t t2626[2]; [L767] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] COND TRUE 0 asdf<2 [L767] FCALL, FORK 0 pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0))=-1, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] COND TRUE 0 asdf<2 [L767] FCALL, FORK 0 pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0))=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L732] 1 __unbuffered_cnt = __unbuffered_cnt + 1 [L734] 1 return 0; [L732] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L734] 2 return 0; [L767] COND FALSE 0 !(asdf<2) [L769] 0 main$tmp_guard0 = __unbuffered_cnt == 2 [L771] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) VAL [\old(cond)=1, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, cond=1, main$tmp_guard0=1, main$tmp_guard1=0, x=0, y=1] [L771] RET 0 assume_abort_if_not(main$tmp_guard0) [L775] 0 main$tmp_guard1 = !(__unbuffered_p0_EAX == 0 && __unbuffered_p1_EAX == 0) [L777] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=0, y=1] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.1s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28 IncrementalHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 28 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.0s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 105 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 74 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 220 IncrementalHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 1 mSDtfsCounter, 220 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 0 NumberOfNonLiveVariables, 220 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 42/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.2s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 283 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 239 mSDsluCounter, 48 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 651 IncrementalHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 19 mSDtfsCounter, 651 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=878occurred in iteration=6, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 762 SizeOfPredicates, 1 NumberOfNonLiveVariables, 510 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 54/77 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 01:16:56,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...