/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-divine_ring_2w1r-1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:49:06,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:49:06,922 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:49:06,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:49:06,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:49:06,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:49:06,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:49:06,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:49:06,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:49:06,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:49:06,980 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:49:06,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:49:06,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:49:06,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:49:06,982 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:49:06,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:49:06,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:49:06,983 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:49:06,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:49:06,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:49:06,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:49:06,984 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:49:06,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:49:06,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:49:06,985 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:49:06,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:49:06,985 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:49:06,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:49:06,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:49:06,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:49:06,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:49:06,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:49:06,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:49:06,987 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:49:06,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:49:06,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:49:06,988 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:49:06,988 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:49:06,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:49:06,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:49:06,988 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:49:06,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:49:07,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:49:07,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:49:07,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:49:07,244 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:49:07,245 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:49:07,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-divine_ring_2w1r-1_bound2.i [2023-08-04 04:49:08,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:49:08,717 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:49:08,717 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-divine_ring_2w1r-1_bound2.i [2023-08-04 04:49:08,739 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd2ee52e7/ae16e24c563e487fbbf1da5964560c8c/FLAGa213c2020 [2023-08-04 04:49:08,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd2ee52e7/ae16e24c563e487fbbf1da5964560c8c [2023-08-04 04:49:08,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:49:08,756 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:49:08,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:49:08,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:49:08,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:49:08,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:49:08" (1/1) ... [2023-08-04 04:49:08,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e6bf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:08, skipping insertion in model container [2023-08-04 04:49:08,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:49:08" (1/1) ... [2023-08-04 04:49:08,811 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:49:08,931 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 04:49:09,210 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-divine_ring_2w1r-1_bound2.i[39095,39108] [2023-08-04 04:49:09,212 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-divine_ring_2w1r-1_bound2.i[39180,39193] [2023-08-04 04:49:09,213 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-divine_ring_2w1r-1_bound2.i[39232,39245] [2023-08-04 04:49:09,280 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-divine_ring_2w1r-1_bound2.i[49388,49401] [2023-08-04 04:49:09,282 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-divine_ring_2w1r-1_bound2.i[49437,49450] [2023-08-04 04:49:09,287 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-divine_ring_2w1r-1_bound2.i[49565,49578] [2023-08-04 04:49:09,288 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-divine_ring_2w1r-1_bound2.i[49623,49636] [2023-08-04 04:49:09,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:49:09,311 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:49:09,320 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 04:49:09,332 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-04 04:49:09,334 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-04 04:49:09,344 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile long [805] [2023-08-04 04:49:09,345 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [806] [2023-08-04 04:49:09,345 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile long [807] [2023-08-04 04:49:09,345 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [809] [2023-08-04 04:49:09,347 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [814] [2023-08-04 04:49:09,347 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [815] [2023-08-04 04:49:09,349 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [827] [2023-08-04 04:49:09,365 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-divine_ring_2w1r-1_bound2.i[39095,39108] [2023-08-04 04:49:09,366 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-divine_ring_2w1r-1_bound2.i[39180,39193] [2023-08-04 04:49:09,366 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-divine_ring_2w1r-1_bound2.i[39232,39245] [2023-08-04 04:49:09,367 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [843] [2023-08-04 04:49:09,369 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [899] [2023-08-04 04:49:09,373 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1054] [2023-08-04 04:49:09,376 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-divine_ring_2w1r-1_bound2.i[49388,49401] [2023-08-04 04:49:09,376 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-divine_ring_2w1r-1_bound2.i[49437,49450] [2023-08-04 04:49:09,377 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-divine_ring_2w1r-1_bound2.i[49565,49578] [2023-08-04 04:49:09,378 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-divine_ring_2w1r-1_bound2.i[49623,49636] [2023-08-04 04:49:09,387 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1078] [2023-08-04 04:49:09,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:49:09,463 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 04:49:09,470 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:49:09,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09 WrapperNode [2023-08-04 04:49:09,470 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:49:09,471 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:49:09,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:49:09,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:49:09,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,546 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 235 [2023-08-04 04:49:09,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:49:09,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:49:09,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:49:09,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:49:09,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,584 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:49:09,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:49:09,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:49:09,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:49:09,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (1/1) ... [2023-08-04 04:49:09,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:49:09,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:49:09,633 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 04:49:09,640 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 04:49:09,664 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-08-04 04:49:09,665 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-08-04 04:49:09,665 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:49:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:49:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:49:09,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:49:09,667 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 04:49:09,785 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:49:09,787 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:49:10,123 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:49:10,132 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:49:10,132 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 04:49:10,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:49:10 BoogieIcfgContainer [2023-08-04 04:49:10,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:49:10,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:49:10,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:49:10,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:49:10,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:49:08" (1/3) ... [2023-08-04 04:49:10,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c04946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:49:10, skipping insertion in model container [2023-08-04 04:49:10,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:49:09" (2/3) ... [2023-08-04 04:49:10,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c04946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:49:10, skipping insertion in model container [2023-08-04 04:49:10,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:49:10" (3/3) ... [2023-08-04 04:49:10,146 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-divine_ring_2w1r-1_bound2.i [2023-08-04 04:49:10,152 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:49:10,160 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:49:10,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-04 04:49:10,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:49:10,272 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 04:49:10,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:10,501 INFO L124 PetriNetUnfolderBase]: 55/500 cut-off events. [2023-08-04 04:49:10,501 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:49:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 500 events. 55/500 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2276 event pairs, 0 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 278. Up to 8 conditions per place. [2023-08-04 04:49:10,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:10,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:10,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:49:10,540 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:10,542 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:10,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:10,636 INFO L124 PetriNetUnfolderBase]: 55/500 cut-off events. [2023-08-04 04:49:10,636 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:49:10,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 500 events. 55/500 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2276 event pairs, 0 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 278. Up to 8 conditions per place. [2023-08-04 04:49:10,661 INFO L119 LiptonReduction]: Number of co-enabled transitions 26898 [2023-08-04 04:49:15,961 INFO L134 LiptonReduction]: Checked pairs total: 53477 [2023-08-04 04:49:15,962 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-08-04 04:49:15,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:49:15,978 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;@65fc72ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:49:15,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-04 04:49:15,992 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:49:15,992 INFO L124 PetriNetUnfolderBase]: 26/146 cut-off events. [2023-08-04 04:49:15,992 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 04:49:15,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:15,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:49:15,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-04 04:49:15,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:15,998 INFO L85 PathProgramCache]: Analyzing trace with hash -577584768, now seen corresponding path program 1 times [2023-08-04 04:49:16,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:16,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810142332] [2023-08-04 04:49:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:17,194 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 04:49:17,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:49:17,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810142332] [2023-08-04 04:49:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810142332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:49:17,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:49:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:49:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484502770] [2023-08-04 04:49:17,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:49:17,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:49:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:49:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:49:17,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:49:17,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 455 [2023-08-04 04:49:17,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 208.42857142857142) internal successors, (1459), 7 states have internal predecessors, (1459), 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 04:49:17,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:49:17,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 455 [2023-08-04 04:49:17,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:49:18,815 INFO L124 PetriNetUnfolderBase]: 6092/9245 cut-off events. [2023-08-04 04:49:18,815 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-08-04 04:49:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18181 conditions, 9245 events. 6092/9245 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 53278 event pairs, 4130 based on Foata normal form. 733/7225 useless extension candidates. Maximal degree in co-relation 17327. Up to 8646 conditions per place. [2023-08-04 04:49:18,877 INFO L140 encePairwiseOnDemand]: 438/455 looper letters, 77 selfloop transitions, 17 changer transitions 53/164 dead transitions. [2023-08-04 04:49:18,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 164 transitions, 650 flow [2023-08-04 04:49:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-04 04:49:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-04 04:49:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2852 transitions. [2023-08-04 04:49:18,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48216398985629755 [2023-08-04 04:49:18,901 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2852 transitions. [2023-08-04 04:49:18,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2852 transitions. [2023-08-04 04:49:18,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:49:18,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2852 transitions. [2023-08-04 04:49:18,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 219.3846153846154) internal successors, (2852), 13 states have internal predecessors, (2852), 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 04:49:18,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 455.0) internal successors, (6370), 14 states have internal predecessors, (6370), 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 04:49:18,935 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 455.0) internal successors, (6370), 14 states have internal predecessors, (6370), 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 04:49:18,937 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 174 flow. Second operand 13 states and 2852 transitions. [2023-08-04 04:49:18,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 164 transitions, 650 flow [2023-08-04 04:49:18,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 164 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:49:18,947 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 296 flow [2023-08-04 04:49:18,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=296, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2023-08-04 04:49:18,952 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2023-08-04 04:49:18,952 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 296 flow [2023-08-04 04:49:18,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 208.42857142857142) internal successors, (1459), 7 states have internal predecessors, (1459), 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 04:49:18,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:18,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:49:18,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:49:18,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-04 04:49:18,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash -137351923, now seen corresponding path program 1 times [2023-08-04 04:49:18,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:18,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363897174] [2023-08-04 04:49:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:18,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:19,569 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 04:49:19,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:49:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363897174] [2023-08-04 04:49:19,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363897174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:49:19,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382460582] [2023-08-04 04:49:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:19,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:49:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:49:19,577 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 04:49:19,586 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 04:49:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:19,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-04 04:49:19,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:49:19,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-04 04:49:19,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-08-04 04:49:19,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 04:49:19,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 04:49:20,024 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 04:49:20,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:49:20,199 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 04:49:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382460582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:49:20,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:49:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-04 04:49:20,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637176043] [2023-08-04 04:49:20,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:49:20,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 04:49:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:49:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 04:49:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=211, Unknown=10, NotChecked=0, Total=272 [2023-08-04 04:49:21,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 455 [2023-08-04 04:49:21,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 296 flow. Second operand has 17 states, 17 states have (on average 163.05882352941177) internal successors, (2772), 17 states have internal predecessors, (2772), 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 04:49:21,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:49:21,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 455 [2023-08-04 04:49:21,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:49:23,829 INFO L124 PetriNetUnfolderBase]: 10395/15412 cut-off events. [2023-08-04 04:49:23,830 INFO L125 PetriNetUnfolderBase]: For 8305/8309 co-relation queries the response was YES. [2023-08-04 04:49:23,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 15412 events. 10395/15412 cut-off events. For 8305/8309 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 81426 event pairs, 6424 based on Foata normal form. 4/12251 useless extension candidates. Maximal degree in co-relation 37204. Up to 15006 conditions per place. [2023-08-04 04:49:23,954 INFO L140 encePairwiseOnDemand]: 443/455 looper letters, 97 selfloop transitions, 15 changer transitions 33/150 dead transitions. [2023-08-04 04:49:23,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 150 transitions, 746 flow [2023-08-04 04:49:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:49:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:49:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1103 transitions. [2023-08-04 04:49:23,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40402930402930404 [2023-08-04 04:49:23,957 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1103 transitions. [2023-08-04 04:49:23,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1103 transitions. [2023-08-04 04:49:23,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:49:23,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1103 transitions. [2023-08-04 04:49:23,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.83333333333334) internal successors, (1103), 6 states have internal predecessors, (1103), 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 04:49:23,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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 04:49:23,966 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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 04:49:23,966 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 296 flow. Second operand 6 states and 1103 transitions. [2023-08-04 04:49:23,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 150 transitions, 746 flow [2023-08-04 04:49:24,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 150 transitions, 726 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-04 04:49:24,064 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 330 flow [2023-08-04 04:49:24,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-04 04:49:24,065 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-04 04:49:24,066 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 330 flow [2023-08-04 04:49:24,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.05882352941177) internal successors, (2772), 17 states have internal predecessors, (2772), 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 04:49:24,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:24,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:49:24,078 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 04:49:24,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:49:24,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-04 04:49:24,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1858074213, now seen corresponding path program 2 times [2023-08-04 04:49:24,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:24,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091901323] [2023-08-04 04:49:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:24,967 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 04:49:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:49:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091901323] [2023-08-04 04:49:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091901323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:49:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976825475] [2023-08-04 04:49:24,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 04:49:24,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:49:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:49:24,971 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 04:49:24,974 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 04:49:25,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 04:49:25,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 04:49:25,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-04 04:49:25,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:49:25,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-08-04 04:49:25,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-04 04:49:25,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 04:49:25,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-08-04 04:49:25,349 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 04:49:25,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:49:25,380 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#reader~0#1.base| v_ArrVal_114) |c_reader_twoThread1of1ForFork1_ring_empty_~r#1.base|) (+ |c_reader_twoThread1of1ForFork1_ring_empty_~r#1.offset| 20)) |c_reader_twoThread1of1ForFork1_ring_empty_#t~mem11#1|)) is different from false [2023-08-04 04:49:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-04 04:49:25,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976825475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:49:25,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:49:25,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 17 [2023-08-04 04:49:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946977496] [2023-08-04 04:49:25,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:49:25,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 04:49:25,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:49:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 04:49:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=213, Unknown=9, NotChecked=30, Total=306 [2023-08-04 04:49:25,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 455 [2023-08-04 04:49:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 330 flow. Second operand has 18 states, 18 states have (on average 162.88888888888889) internal successors, (2932), 18 states have internal predecessors, (2932), 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 04:49:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:49:25,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 455 [2023-08-04 04:49:25,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:49:27,555 INFO L124 PetriNetUnfolderBase]: 10393/15392 cut-off events. [2023-08-04 04:49:27,555 INFO L125 PetriNetUnfolderBase]: For 7667/7671 co-relation queries the response was YES. [2023-08-04 04:49:27,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37101 conditions, 15392 events. 10393/15392 cut-off events. For 7667/7671 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 81026 event pairs, 6416 based on Foata normal form. 4/12236 useless extension candidates. Maximal degree in co-relation 37043. Up to 14989 conditions per place. [2023-08-04 04:49:27,758 INFO L140 encePairwiseOnDemand]: 433/455 looper letters, 92 selfloop transitions, 22 changer transitions 37/155 dead transitions. [2023-08-04 04:49:27,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 155 transitions, 796 flow [2023-08-04 04:49:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 04:49:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 04:49:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1431 transitions. [2023-08-04 04:49:27,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931318681318681 [2023-08-04 04:49:27,763 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1431 transitions. [2023-08-04 04:49:27,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1431 transitions. [2023-08-04 04:49:27,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:49:27,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1431 transitions. [2023-08-04 04:49:27,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.875) internal successors, (1431), 8 states have internal predecessors, (1431), 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 04:49:27,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 455.0) internal successors, (4095), 9 states have internal predecessors, (4095), 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 04:49:27,772 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 455.0) internal successors, (4095), 9 states have internal predecessors, (4095), 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 04:49:27,772 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 330 flow. Second operand 8 states and 1431 transitions. [2023-08-04 04:49:27,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 155 transitions, 796 flow [2023-08-04 04:49:27,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 155 transitions, 742 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-04 04:49:27,813 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 391 flow [2023-08-04 04:49:27,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=391, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2023-08-04 04:49:27,814 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 22 predicate places. [2023-08-04 04:49:27,815 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 391 flow [2023-08-04 04:49:27,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.88888888888889) internal successors, (2932), 18 states have internal predecessors, (2932), 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 04:49:27,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:27,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:49:27,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 04:49:28,023 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,SelfDestructingSolverStorable2 [2023-08-04 04:49:28,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-04 04:49:28,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 986717495, now seen corresponding path program 1 times [2023-08-04 04:49:28,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:28,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069808101] [2023-08-04 04:49:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:28,073 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 04:49:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:49:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069808101] [2023-08-04 04:49:28,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069808101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:49:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230574139] [2023-08-04 04:49:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:28,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:49:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:49:28,076 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 04:49:28,080 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 04:49:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:28,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:49:28,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:49:28,197 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 04:49:28,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:49:28,211 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 04:49:28,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230574139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:49:28,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:49:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:49:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799452076] [2023-08-04 04:49:28,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:49:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:49:28,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:49:28,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:49:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:49:28,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 455 [2023-08-04 04:49:28,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 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 04:49:28,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:49:28,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 455 [2023-08-04 04:49:28,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:49:28,243 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-08-04 04:49:28,244 INFO L125 PetriNetUnfolderBase]: For 43/45 co-relation queries the response was YES. [2023-08-04 04:49:28,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 23 events. 4/23 cut-off events. For 43/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 6/29 useless extension candidates. Maximal degree in co-relation 80. Up to 8 conditions per place. [2023-08-04 04:49:28,244 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 04:49:28,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 21 transitions, 143 flow [2023-08-04 04:49:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:49:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:49:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 900 transitions. [2023-08-04 04:49:28,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2023-08-04 04:49:28,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 900 transitions. [2023-08-04 04:49:28,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 900 transitions. [2023-08-04 04:49:28,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:49:28,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 900 transitions. [2023-08-04 04:49:28,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 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 04:49:28,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 455.0) internal successors, (2275), 5 states have internal predecessors, (2275), 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 04:49:28,253 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 455.0) internal successors, (2275), 5 states have internal predecessors, (2275), 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 04:49:28,253 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 391 flow. Second operand 4 states and 900 transitions. [2023-08-04 04:49:28,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 21 transitions, 143 flow [2023-08-04 04:49:28,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 81 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-08-04 04:49:28,254 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-04 04:49:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-04 04:49:28,255 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -39 predicate places. [2023-08-04 04:49:28,255 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-04 04:49:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 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 04:49:28,259 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2023-08-04 04:49:28,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-04 04:49:28,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-04 04:49:28,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-04 04:49:28,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-04 04:49:28,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-04 04:49:28,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-04 04:49:28,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location reader_twoErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-04 04:49:28,267 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 04:49:28,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:49:28,467 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-08-04 04:49:28,469 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 04:49:28,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:28,518 INFO L124 PetriNetUnfolderBase]: 55/500 cut-off events. [2023-08-04 04:49:28,519 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:49:28,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 500 events. 55/500 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2276 event pairs, 0 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 278. Up to 8 conditions per place. [2023-08-04 04:49:28,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:28,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:28,525 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:49:28,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:28,525 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:28,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 247 transitions, 516 flow [2023-08-04 04:49:28,567 INFO L124 PetriNetUnfolderBase]: 55/500 cut-off events. [2023-08-04 04:49:28,568 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:49:28,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 500 events. 55/500 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2276 event pairs, 0 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 278. Up to 8 conditions per place. [2023-08-04 04:49:28,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 26898 [2023-08-04 04:49:33,317 INFO L134 LiptonReduction]: Checked pairs total: 50178 [2023-08-04 04:49:33,318 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-08-04 04:49:33,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:49:33,319 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;@65fc72ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:49:33,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:49:33,323 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:49:33,324 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-04 04:49:33,324 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:49:33,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:33,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:49:33,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:49:33,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash 364278220, now seen corresponding path program 1 times [2023-08-04 04:49:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:33,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715088719] [2023-08-04 04:49:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:49:33,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:49:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:49:33,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:49:33,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:49:33,373 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 04:49:33,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 04:49:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 04:49:33,373 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:49:33,374 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 04:49:33,374 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:49:33,375 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:49:33,440 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 04:49:33,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 373 transitions, 794 flow [2023-08-04 04:49:33,677 INFO L124 PetriNetUnfolderBase]: 179/1338 cut-off events. [2023-08-04 04:49:33,677 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:49:33,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 1338 events. 179/1338 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8608 event pairs, 1 based on Foata normal form. 0/1164 useless extension candidates. Maximal degree in co-relation 864. Up to 32 conditions per place. [2023-08-04 04:49:33,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 373 transitions, 794 flow [2023-08-04 04:49:33,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 340 places, 373 transitions, 794 flow [2023-08-04 04:49:33,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:49:33,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 340 places, 373 transitions, 794 flow [2023-08-04 04:49:33,710 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 340 places, 373 transitions, 794 flow [2023-08-04 04:49:33,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 373 transitions, 794 flow [2023-08-04 04:49:33,953 INFO L124 PetriNetUnfolderBase]: 179/1338 cut-off events. [2023-08-04 04:49:33,954 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:49:33,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 1338 events. 179/1338 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8608 event pairs, 1 based on Foata normal form. 0/1164 useless extension candidates. Maximal degree in co-relation 864. Up to 32 conditions per place. [2023-08-04 04:49:34,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 85104 [2023-08-04 04:49:39,730 INFO L134 LiptonReduction]: Checked pairs total: 184563 [2023-08-04 04:49:39,730 INFO L136 LiptonReduction]: Total number of compositions: 313 [2023-08-04 04:49:39,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:49:39,732 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;@65fc72ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:49:39,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-04 04:49:39,755 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:49:39,755 INFO L124 PetriNetUnfolderBase]: 60/320 cut-off events. [2023-08-04 04:49:39,755 INFO L125 PetriNetUnfolderBase]: For 37/48 co-relation queries the response was YES. [2023-08-04 04:49:39,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:39,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:49:39,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-08-04 04:49:39,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2101635839, now seen corresponding path program 1 times [2023-08-04 04:49:39,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:39,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332736958] [2023-08-04 04:49:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:40,074 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 04:49:40,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:49:40,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332736958] [2023-08-04 04:49:40,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332736958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:49:40,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:49:40,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:49:40,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353013650] [2023-08-04 04:49:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:49:40,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:49:40,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:49:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:49:40,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:49:40,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 686 [2023-08-04 04:49:40,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 124 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 316.2857142857143) internal successors, (2214), 7 states have internal predecessors, (2214), 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 04:49:40,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:49:40,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 686 [2023-08-04 04:49:40,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand