/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_rmo_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:48:39,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:48:40,031 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:48:40,036 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:48:40,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:48:40,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:48:40,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:48:40,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:48:40,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:48:40,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:48:40,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:48:40,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:48:40,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:48:40,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:48:40,065 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:48:40,065 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:48:40,065 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:48:40,065 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:48:40,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:48:40,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:48:40,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:48:40,066 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:48:40,066 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:48:40,066 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:48:40,066 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:48:40,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:48:40,066 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:48:40,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:48:40,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:48:40,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:48:40,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:48:40,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:48:40,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:48:40,068 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:48:40,068 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:48:40,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:48:40,069 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:48:40,069 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:48:40,069 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:48:40,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:48:40,069 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:48:40,069 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:48:40,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:48:40,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:48:40,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:48:40,237 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:48:40,237 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:48:40,238 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_rmo_bound2.i [2023-08-03 18:48:41,191 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:48:41,330 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:48:41,330 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_rmo_bound2.i [2023-08-03 18:48:41,340 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01740f63/a15d088bd1544be1bb7fc0779fd1da31/FLAGfdcb136cb [2023-08-03 18:48:41,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01740f63/a15d088bd1544be1bb7fc0779fd1da31 [2023-08-03 18:48:41,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:48:41,352 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:48:41,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:48:41,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:48:41,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:48:41,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b264ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41, skipping insertion in model container [2023-08-03 18:48:41,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,384 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:48:41,479 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_safe028_rmo_bound2.i[988,1001] [2023-08-03 18:48:41,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:48:41,635 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:48:41,644 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_safe028_rmo_bound2.i[988,1001] [2023-08-03 18:48:41,661 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:48:41,662 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:48:41,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:48:41,726 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:48:41,727 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:48:41,731 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:48:41,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41 WrapperNode [2023-08-03 18:48:41,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:48:41,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:48:41,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:48:41,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:48:41,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,775 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-03 18:48:41,775 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:48:41,776 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:48:41,776 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:48:41,776 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:48:41,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:48:41,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:48:41,800 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:48:41,800 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:48:41,801 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (1/1) ... [2023-08-03 18:48:41,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:48:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:48:41,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 18:48:41,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:48:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:48:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:48:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:48:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:48:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:48:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:48:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:48:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:48:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:48:41,851 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 18:48:41,956 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:48:41,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:48:42,248 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:48:42,424 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:48:42,424 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:48:42,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:48:42 BoogieIcfgContainer [2023-08-03 18:48:42,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:48:42,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:48:42,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:48:42,433 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:48:42,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:48:41" (1/3) ... [2023-08-03 18:48:42,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65552797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:48:42, skipping insertion in model container [2023-08-03 18:48:42,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:48:41" (2/3) ... [2023-08-03 18:48:42,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65552797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:48:42, skipping insertion in model container [2023-08-03 18:48:42,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:48:42" (3/3) ... [2023-08-03 18:48:42,437 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe028_rmo_bound2.i [2023-08-03 18:48:42,443 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:48:42,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:48:42,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:48:42,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:48:42,502 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:48:42,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 18:48:42,665 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-03 18:48:42,665 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:48:42,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 463 events. 30/463 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1921 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 284. Up to 16 conditions per place. [2023-08-03 18:48:42,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 18:48:42,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 133 transitions, 281 flow [2023-08-03 18:48:42,679 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:48:42,691 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 18:48:42,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 18:48:42,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 133 transitions, 281 flow [2023-08-03 18:48:42,732 INFO L124 PetriNetUnfolderBase]: 22/367 cut-off events. [2023-08-03 18:48:42,732 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:48:42,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 367 events. 22/367 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1373 event pairs, 0 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 236. Up to 16 conditions per place. [2023-08-03 18:48:42,737 INFO L119 LiptonReduction]: Number of co-enabled transitions 1806 [2023-08-03 18:48:47,120 INFO L134 LiptonReduction]: Checked pairs total: 5388 [2023-08-03 18:48:47,120 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-03 18:48:47,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:48:47,133 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;@286a8b37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:48:47,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:48:47,136 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:48:47,136 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 18:48:47,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:48:47,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:48:47,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:48:47,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:48:47,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:48:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1924187989, now seen corresponding path program 1 times [2023-08-03 18:48:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:48:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109452231] [2023-08-03 18:48:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:48:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:48:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:48:47,257 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:48:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:48:47,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:48:47,287 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:48:47,288 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 18:48:47,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 18:48:47,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 18:48:47,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 18:48:47,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:48:47,294 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 18:48:47,298 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:48:47,298 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:48:47,328 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:48:47,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 370 flow [2023-08-03 18:48:47,483 INFO L124 PetriNetUnfolderBase]: 93/1386 cut-off events. [2023-08-03 18:48:47,483 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:48:47,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 1386 events. 93/1386 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9305 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1009. Up to 54 conditions per place. [2023-08-03 18:48:47,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 167 transitions, 370 flow [2023-08-03 18:48:47,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 155 transitions, 346 flow [2023-08-03 18:48:47,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:48:47,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 155 transitions, 346 flow [2023-08-03 18:48:47,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 155 transitions, 346 flow [2023-08-03 18:48:47,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 155 transitions, 346 flow [2023-08-03 18:48:47,574 INFO L124 PetriNetUnfolderBase]: 66/1062 cut-off events. [2023-08-03 18:48:47,574 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:48:47,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 1062 events. 66/1062 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6602 event pairs, 0 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 793. Up to 54 conditions per place. [2023-08-03 18:48:47,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 4444 [2023-08-03 18:48:52,353 INFO L134 LiptonReduction]: Checked pairs total: 15588 [2023-08-03 18:48:52,353 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-03 18:48:52,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:48:52,355 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;@286a8b37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:48:52,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:48:52,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:48:52,359 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-08-03 18:48:52,359 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 18:48:52,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:48:52,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:48:52,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:48:52,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:48:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1212542843, now seen corresponding path program 1 times [2023-08-03 18:48:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:48:52,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34333359] [2023-08-03 18:48:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:48:52,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:48:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:48:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:48:52,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:48:52,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34333359] [2023-08-03 18:48:52,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34333359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:48:52,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:48:52,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:48:52,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780745221] [2023-08-03 18:48:52,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:48:52,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:48:52,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:48:52,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:48:52,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:48:52,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:48:52,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:48:52,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:48:52,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:48:52,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:49:28,908 INFO L124 PetriNetUnfolderBase]: 272349/357532 cut-off events. [2023-08-03 18:49:28,908 INFO L125 PetriNetUnfolderBase]: For 6236/6236 co-relation queries the response was YES. [2023-08-03 18:49:29,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709233 conditions, 357532 events. 272349/357532 cut-off events. For 6236/6236 co-relation queries the response was YES. Maximal size of possible extension queue 7914. Compared 2332313 event pairs, 218772 based on Foata normal form. 8820/345308 useless extension candidates. Maximal degree in co-relation 153260. Up to 343786 conditions per place. [2023-08-03 18:49:30,866 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 2 changer transitions 1/51 dead transitions. [2023-08-03 18:49:30,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 224 flow [2023-08-03 18:49:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:49:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:49:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-03 18:49:30,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512367491166078 [2023-08-03 18:49:30,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-03 18:49:30,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-03 18:49:30,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:49:30,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-03 18:49:30,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:49:30,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:49:30,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:49:30,886 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 130 flow. Second operand 3 states and 468 transitions. [2023-08-03 18:49:30,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 224 flow [2023-08-03 18:49:30,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 218 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:49:30,899 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 132 flow [2023-08-03 18:49:30,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-08-03 18:49:30,902 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-03 18:49:30,902 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 132 flow [2023-08-03 18:49:30,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:49:30,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:49:30,903 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:49:30,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:49:30,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:49:30,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:49:30,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2086334846, now seen corresponding path program 1 times [2023-08-03 18:49:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:49:30,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021185011] [2023-08-03 18:49:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:49:30,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:49:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:49:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:49:30,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:49:30,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021185011] [2023-08-03 18:49:30,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021185011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:49:30,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045064963] [2023-08-03 18:49:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:49:30,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:49:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:49:30,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:49:30,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 18:49:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:49:31,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:49:31,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:49:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:49:31,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:49:31,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045064963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:49:31,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:49:31,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:49:31,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601116676] [2023-08-03 18:49:31,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:49:31,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:49:31,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:49:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:49:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:49:31,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-03 18:49:31,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:49:31,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:49:31,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-03 18:49:31,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:50:01,607 INFO L124 PetriNetUnfolderBase]: 237738/312709 cut-off events. [2023-08-03 18:50:01,607 INFO L125 PetriNetUnfolderBase]: For 5284/5284 co-relation queries the response was YES. [2023-08-03 18:50:02,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620142 conditions, 312709 events. 237738/312709 cut-off events. For 5284/5284 co-relation queries the response was YES. Maximal size of possible extension queue 6932. Compared 2023951 event pairs, 153240 based on Foata normal form. 16/300925 useless extension candidates. Maximal degree in co-relation 162850. Up to 300296 conditions per place. [2023-08-03 18:50:03,487 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 45 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-03 18:50:03,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 250 flow [2023-08-03 18:50:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:50:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:50:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 750 transitions. [2023-08-03 18:50:03,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300353356890459 [2023-08-03 18:50:03,492 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 750 transitions. [2023-08-03 18:50:03,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 750 transitions. [2023-08-03 18:50:03,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:50:03,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 750 transitions. [2023-08-03 18:50:03,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:03,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:03,500 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:03,500 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 132 flow. Second operand 5 states and 750 transitions. [2023-08-03 18:50:03,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 250 flow [2023-08-03 18:50:03,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:50:03,504 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 146 flow [2023-08-03 18:50:03,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-03 18:50:03,505 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2023-08-03 18:50:03,505 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 146 flow [2023-08-03 18:50:03,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:03,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:50:03,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:50:03,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 18:50:03,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:50:03,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:50:03,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:50:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1916280231, now seen corresponding path program 1 times [2023-08-03 18:50:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:50:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976068752] [2023-08-03 18:50:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:50:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:50:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:50:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:50:03,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:50:03,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976068752] [2023-08-03 18:50:03,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976068752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:50:03,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646516649] [2023-08-03 18:50:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:50:03,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:50:03,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:50:03,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:50:03,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 18:50:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:50:03,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:50:03,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:50:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:50:03,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:50:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646516649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:50:03,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:50:03,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:50:03,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059527232] [2023-08-03 18:50:03,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:50:03,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:50:03,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:50:03,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:50:03,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:50:03,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:50:03,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:03,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:50:03,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:50:03,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:50:34,651 INFO L124 PetriNetUnfolderBase]: 230316/305627 cut-off events. [2023-08-03 18:50:34,651 INFO L125 PetriNetUnfolderBase]: For 4820/4820 co-relation queries the response was YES. [2023-08-03 18:50:35,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602921 conditions, 305627 events. 230316/305627 cut-off events. For 4820/4820 co-relation queries the response was YES. Maximal size of possible extension queue 7020. Compared 2015972 event pairs, 185514 based on Foata normal form. 0/296007 useless extension candidates. Maximal degree in co-relation 130121. Up to 289721 conditions per place. [2023-08-03 18:50:36,234 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 47 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 18:50:36,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 268 flow [2023-08-03 18:50:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:50:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:50:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-03 18:50:36,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559481743227326 [2023-08-03 18:50:36,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-03 18:50:36,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-03 18:50:36,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:50:36,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-03 18:50:36,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:36,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:36,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:36,239 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 146 flow. Second operand 3 states and 472 transitions. [2023-08-03 18:50:36,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 268 flow [2023-08-03 18:50:36,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 261 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:50:36,240 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 154 flow [2023-08-03 18:50:36,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-03 18:50:36,241 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-03 18:50:36,241 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 154 flow [2023-08-03 18:50:36,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:36,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:50:36,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:50:36,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 18:50:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 18:50:36,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:50:36,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:50:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash -836038139, now seen corresponding path program 1 times [2023-08-03 18:50:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:50:36,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071195715] [2023-08-03 18:50:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:50:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:50:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:50:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:50:36,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:50:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071195715] [2023-08-03 18:50:36,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071195715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:50:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71958070] [2023-08-03 18:50:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:50:36,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:50:36,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:50:36,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:50:36,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 18:50:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:50:36,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:50:36,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:50:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:50:36,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:50:36,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71958070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:50:36,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:50:36,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:50:36,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042033376] [2023-08-03 18:50:36,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:50:36,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:50:36,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:50:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:50:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:50:36,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:50:36,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:50:36,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:50:36,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:50:36,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand