/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 23:48:59,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 23:48:59,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-23 23:48:59,326 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 23:48:59,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 23:48:59,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 23:48:59,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 23:48:59,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 23:48:59,359 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 23:48:59,362 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 23:48:59,362 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 23:48:59,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 23:48:59,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 23:48:59,364 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 23:48:59,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 23:48:59,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 23:48:59,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 23:48:59,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 23:48:59,365 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 23:48:59,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 23:48:59,365 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 23:48:59,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 23:48:59,366 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 23:48:59,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 23:48:59,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 23:48:59,367 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 23:48:59,367 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 23:48:59,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:48:59,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 23:48:59,368 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 23:48:59,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 23:48:59,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 23:48:59,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 23:48:59,369 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 23:48:59,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 23:48:59,370 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 23:48:59,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 23:48:59,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 23:48:59,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 23:48:59,679 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 23:48:59,681 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 23:48:59,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-08-23 23:49:00,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 23:49:01,155 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 23:49:01,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-08-23 23:49:01,171 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5a0aaeba/4ecb08aae8134f30a8795694895b3550/FLAG85e2e4c70 [2023-08-23 23:49:01,187 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5a0aaeba/4ecb08aae8134f30a8795694895b3550 [2023-08-23 23:49:01,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 23:49:01,193 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 23:49:01,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 23:49:01,195 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 23:49:01,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 23:49:01,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@694f0d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01, skipping insertion in model container [2023-08-23 23:49:01,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,261 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 23:49:01,412 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 23:49:01,640 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39095,39108] [2023-08-23 23:49:01,641 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39180,39193] [2023-08-23 23:49:01,642 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39232,39245] [2023-08-23 23:49:01,691 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49388,49401] [2023-08-23 23:49:01,693 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49437,49450] [2023-08-23 23:49:01,694 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49565,49578] [2023-08-23 23:49:01,695 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49623,49636] [2023-08-23 23:49:01,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:49:01,708 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 23:49:01,721 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 23:49:01,739 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-23 23:49:01,740 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-23 23:49:01,764 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile long [805] [2023-08-23 23:49:01,766 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [806] [2023-08-23 23:49:01,766 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile long [807] [2023-08-23 23:49:01,767 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [809] [2023-08-23 23:49:01,768 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [814] [2023-08-23 23:49:01,769 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [815] [2023-08-23 23:49:01,770 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [827] [2023-08-23 23:49:01,771 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39095,39108] [2023-08-23 23:49:01,772 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39180,39193] [2023-08-23 23:49:01,772 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[39232,39245] [2023-08-23 23:49:01,773 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [843] [2023-08-23 23:49:01,775 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [899] [2023-08-23 23:49:01,779 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1054] [2023-08-23 23:49:01,782 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49388,49401] [2023-08-23 23:49:01,782 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49437,49450] [2023-08-23 23:49:01,783 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49565,49578] [2023-08-23 23:49:01,784 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i[49623,49636] [2023-08-23 23:49:01,786 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1078] [2023-08-23 23:49:01,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:49:01,839 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 23:49:01,845 INFO L206 MainTranslator]: Completed translation [2023-08-23 23:49:01,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01 WrapperNode [2023-08-23 23:49:01,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 23:49:01,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 23:49:01,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 23:49:01,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 23:49:01,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,909 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 206 [2023-08-23 23:49:01,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 23:49:01,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 23:49:01,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 23:49:01,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 23:49:01,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,922 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 23:49:01,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 23:49:01,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 23:49:01,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 23:49:01,940 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (1/1) ... [2023-08-23 23:49:01,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:49:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:49:01,974 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) [2023-08-23 23:49:01,987 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 [2023-08-23 23:49:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-08-23 23:49:02,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-08-23 23:49:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-08-23 23:49:02,014 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-08-23 23:49:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 23:49:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 23:49:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 23:49:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 23:49:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-23 23:49:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 23:49:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 23:49:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 23:49:02,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 23:49:02,019 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 23:49:02,141 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 23:49:02,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 23:49:02,552 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 23:49:02,560 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 23:49:02,560 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-23 23:49:02,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:49:02 BoogieIcfgContainer [2023-08-23 23:49:02,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 23:49:02,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 23:49:02,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 23:49:02,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 23:49:02,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 11:49:01" (1/3) ... [2023-08-23 23:49:02,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f856a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:49:02, skipping insertion in model container [2023-08-23 23:49:02,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:49:01" (2/3) ... [2023-08-23 23:49:02,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f856a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:49:02, skipping insertion in model container [2023-08-23 23:49:02,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:49:02" (3/3) ... [2023-08-23 23:49:02,572 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2023-08-23 23:49:02,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 23:49:02,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-23 23:49:02,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 23:49:02,692 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-23 23:49:02,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2023-08-23 23:49:02,828 INFO L124 PetriNetUnfolderBase]: 17/218 cut-off events. [2023-08-23 23:49:02,829 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 23:49:02,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 468 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-23 23:49:02,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2023-08-23 23:49:02,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 208 transitions, 425 flow [2023-08-23 23:49:02,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:49:02,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 208 transitions, 425 flow [2023-08-23 23:49:02,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 208 transitions, 425 flow [2023-08-23 23:49:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 208 transitions, 425 flow [2023-08-23 23:49:02,918 INFO L124 PetriNetUnfolderBase]: 17/208 cut-off events. [2023-08-23 23:49:02,918 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 23:49:02,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 208 events. 17/208 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 421 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-23 23:49:02,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 17492 [2023-08-23 23:49:08,005 INFO L134 LiptonReduction]: Checked pairs total: 30229 [2023-08-23 23:49:08,006 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-23 23:49:08,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:49:08,021 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=false, 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;@31146cc5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:49:08,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-23 23:49:08,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:49:08,029 INFO L124 PetriNetUnfolderBase]: 8/48 cut-off events. [2023-08-23 23:49:08,029 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 23:49:08,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:08,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:49:08,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:08,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash 783077020, now seen corresponding path program 1 times [2023-08-23 23:49:08,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:08,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553378350] [2023-08-23 23:49:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:08,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:09,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553378350] [2023-08-23 23:49:09,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553378350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:09,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-23 23:49:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806381432] [2023-08-23 23:49:09,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 23:49:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 23:49:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-23 23:49:09,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 404 [2023-08-23 23:49:09,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 144.66666666666666) internal successors, (868), 6 states have internal predecessors, (868), 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) [2023-08-23 23:49:09,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:09,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 404 [2023-08-23 23:49:09,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:10,013 INFO L124 PetriNetUnfolderBase]: 5862/8420 cut-off events. [2023-08-23 23:49:10,013 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-23 23:49:10,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16905 conditions, 8420 events. 5862/8420 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 38166 event pairs, 3643 based on Foata normal form. 203/6709 useless extension candidates. Maximal degree in co-relation 16801. Up to 8407 conditions per place. [2023-08-23 23:49:10,131 INFO L140 encePairwiseOnDemand]: 393/404 looper letters, 54 selfloop transitions, 8 changer transitions 5/68 dead transitions. [2023-08-23 23:49:10,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 279 flow [2023-08-23 23:49:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:49:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:49:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 925 transitions. [2023-08-23 23:49:10,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816006600660066 [2023-08-23 23:49:10,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 925 transitions. [2023-08-23 23:49:10,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 925 transitions. [2023-08-23 23:49:10,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:10,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 925 transitions. [2023-08-23 23:49:10,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.16666666666666) internal successors, (925), 6 states have internal predecessors, (925), 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) [2023-08-23 23:49:10,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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) [2023-08-23 23:49:10,171 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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) [2023-08-23 23:49:10,173 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 127 flow. Second operand 6 states and 925 transitions. [2023-08-23 23:49:10,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 279 flow [2023-08-23 23:49:10,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 274 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-23 23:49:10,179 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 149 flow [2023-08-23 23:49:10,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-08-23 23:49:10,183 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-23 23:49:10,183 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 149 flow [2023-08-23 23:49:10,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.66666666666666) internal successors, (868), 6 states have internal predecessors, (868), 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) [2023-08-23 23:49:10,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:10,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:49:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 23:49:10,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:10,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:10,185 INFO L85 PathProgramCache]: Analyzing trace with hash 580708536, now seen corresponding path program 1 times [2023-08-23 23:49:10,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:10,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975597270] [2023-08-23 23:49:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:10,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975597270] [2023-08-23 23:49:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975597270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:10,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:10,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-23 23:49:10,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401866148] [2023-08-23 23:49:10,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:10,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:49:10,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:49:10,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:49:10,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 404 [2023-08-23 23:49:10,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 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) [2023-08-23 23:49:10,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:10,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 404 [2023-08-23 23:49:10,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:11,977 INFO L124 PetriNetUnfolderBase]: 7114/10233 cut-off events. [2023-08-23 23:49:11,977 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-08-23 23:49:11,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21257 conditions, 10233 events. 7114/10233 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 48187 event pairs, 1356 based on Foata normal form. 0/8136 useless extension candidates. Maximal degree in co-relation 16521. Up to 7924 conditions per place. [2023-08-23 23:49:12,026 INFO L140 encePairwiseOnDemand]: 392/404 looper letters, 106 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2023-08-23 23:49:12,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 125 transitions, 551 flow [2023-08-23 23:49:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:49:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:49:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 956 transitions. [2023-08-23 23:49:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943894389438944 [2023-08-23 23:49:12,030 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 956 transitions. [2023-08-23 23:49:12,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 956 transitions. [2023-08-23 23:49:12,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:12,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 956 transitions. [2023-08-23 23:49:12,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 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) [2023-08-23 23:49:12,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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) [2023-08-23 23:49:12,039 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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) [2023-08-23 23:49:12,039 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 149 flow. Second operand 6 states and 956 transitions. [2023-08-23 23:49:12,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 125 transitions, 551 flow [2023-08-23 23:49:12,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 125 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-23 23:49:12,060 INFO L231 Difference]: Finished difference. Result has 61 places, 68 transitions, 247 flow [2023-08-23 23:49:12,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=61, PETRI_TRANSITIONS=68} [2023-08-23 23:49:12,062 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-23 23:49:12,062 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 68 transitions, 247 flow [2023-08-23 23:49:12,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 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) [2023-08-23 23:49:12,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:12,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:49:12,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 23:49:12,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:12,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:12,066 INFO L85 PathProgramCache]: Analyzing trace with hash -962420307, now seen corresponding path program 1 times [2023-08-23 23:49:12,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:12,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744732322] [2023-08-23 23:49:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:12,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:12,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744732322] [2023-08-23 23:49:12,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744732322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:12,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:12,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-23 23:49:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112659797] [2023-08-23 23:49:12,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:12,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:49:12,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:49:12,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:49:12,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 404 [2023-08-23 23:49:12,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 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) [2023-08-23 23:49:12,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:12,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 404 [2023-08-23 23:49:12,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:13,756 INFO L124 PetriNetUnfolderBase]: 6466/9355 cut-off events. [2023-08-23 23:49:13,757 INFO L125 PetriNetUnfolderBase]: For 2017/2047 co-relation queries the response was YES. [2023-08-23 23:49:13,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21322 conditions, 9355 events. 6466/9355 cut-off events. For 2017/2047 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 42608 event pairs, 1400 based on Foata normal form. 26/7558 useless extension candidates. Maximal degree in co-relation 20715. Up to 7644 conditions per place. [2023-08-23 23:49:13,802 INFO L140 encePairwiseOnDemand]: 396/404 looper letters, 101 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2023-08-23 23:49:13,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 590 flow [2023-08-23 23:49:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:49:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:49:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 947 transitions. [2023-08-23 23:49:13,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39067656765676567 [2023-08-23 23:49:13,806 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 947 transitions. [2023-08-23 23:49:13,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 947 transitions. [2023-08-23 23:49:13,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:13,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 947 transitions. [2023-08-23 23:49:13,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.83333333333334) internal successors, (947), 6 states have internal predecessors, (947), 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) [2023-08-23 23:49:13,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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) [2023-08-23 23:49:13,814 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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) [2023-08-23 23:49:13,814 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 247 flow. Second operand 6 states and 947 transitions. [2023-08-23 23:49:13,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 590 flow [2023-08-23 23:49:13,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 119 transitions, 572 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-23 23:49:13,840 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 277 flow [2023-08-23 23:49:13,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2023-08-23 23:49:13,841 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-23 23:49:13,841 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 277 flow [2023-08-23 23:49:13,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 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) [2023-08-23 23:49:13,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:13,842 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, 1, 1, 1] [2023-08-23 23:49:13,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 23:49:13,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:13,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash 175845992, now seen corresponding path program 1 times [2023-08-23 23:49:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:13,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24865959] [2023-08-23 23:49:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:14,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24865959] [2023-08-23 23:49:14,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24865959] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:14,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:14,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:49:14,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511508037] [2023-08-23 23:49:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-23 23:49:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-23 23:49:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-23 23:49:14,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-23 23:49:14,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 277 flow. Second operand has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 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) [2023-08-23 23:49:14,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:14,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-23 23:49:14,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:17,600 INFO L124 PetriNetUnfolderBase]: 8466/12275 cut-off events. [2023-08-23 23:49:17,600 INFO L125 PetriNetUnfolderBase]: For 5448/5450 co-relation queries the response was YES. [2023-08-23 23:49:17,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28844 conditions, 12275 events. 8466/12275 cut-off events. For 5448/5450 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 60922 event pairs, 760 based on Foata normal form. 2/10143 useless extension candidates. Maximal degree in co-relation 25556. Up to 7919 conditions per place. [2023-08-23 23:49:17,654 INFO L140 encePairwiseOnDemand]: 385/404 looper letters, 273 selfloop transitions, 91 changer transitions 0/365 dead transitions. [2023-08-23 23:49:17,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 365 transitions, 2035 flow [2023-08-23 23:49:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-23 23:49:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-23 23:49:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2914 transitions. [2023-08-23 23:49:17,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36064356435643563 [2023-08-23 23:49:17,664 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2914 transitions. [2023-08-23 23:49:17,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2914 transitions. [2023-08-23 23:49:17,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:17,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2914 transitions. [2023-08-23 23:49:17,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 145.7) internal successors, (2914), 20 states have internal predecessors, (2914), 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) [2023-08-23 23:49:17,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 404.0) internal successors, (8484), 21 states have internal predecessors, (8484), 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) [2023-08-23 23:49:17,686 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 404.0) internal successors, (8484), 21 states have internal predecessors, (8484), 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) [2023-08-23 23:49:17,686 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 277 flow. Second operand 20 states and 2914 transitions. [2023-08-23 23:49:17,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 365 transitions, 2035 flow [2023-08-23 23:49:17,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 365 transitions, 1969 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-23 23:49:17,705 INFO L231 Difference]: Finished difference. Result has 88 places, 151 transitions, 1084 flow [2023-08-23 23:49:17,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1084, PETRI_PLACES=88, PETRI_TRANSITIONS=151} [2023-08-23 23:49:17,706 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2023-08-23 23:49:17,706 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 151 transitions, 1084 flow [2023-08-23 23:49:17,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 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) [2023-08-23 23:49:17,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:17,708 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, 1, 1, 1] [2023-08-23 23:49:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 23:49:17,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:17,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1114646708, now seen corresponding path program 2 times [2023-08-23 23:49:17,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:17,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511551980] [2023-08-23 23:49:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:17,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511551980] [2023-08-23 23:49:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511551980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:18,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:18,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-23 23:49:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233594477] [2023-08-23 23:49:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-23 23:49:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-23 23:49:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-23 23:49:18,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-23 23:49:18,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 151 transitions, 1084 flow. Second operand has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 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) [2023-08-23 23:49:18,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:18,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-23 23:49:18,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:20,724 INFO L124 PetriNetUnfolderBase]: 9590/13973 cut-off events. [2023-08-23 23:49:20,725 INFO L125 PetriNetUnfolderBase]: For 11310/11384 co-relation queries the response was YES. [2023-08-23 23:49:20,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39128 conditions, 13973 events. 9590/13973 cut-off events. For 11310/11384 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 70854 event pairs, 1532 based on Foata normal form. 74/12377 useless extension candidates. Maximal degree in co-relation 37513. Up to 8589 conditions per place. [2023-08-23 23:49:20,964 INFO L140 encePairwiseOnDemand]: 386/404 looper letters, 202 selfloop transitions, 126 changer transitions 0/329 dead transitions. [2023-08-23 23:49:20,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 329 transitions, 2407 flow [2023-08-23 23:49:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-23 23:49:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-23 23:49:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2044 transitions. [2023-08-23 23:49:20,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3613861386138614 [2023-08-23 23:49:20,976 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2044 transitions. [2023-08-23 23:49:20,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2044 transitions. [2023-08-23 23:49:20,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:20,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2044 transitions. [2023-08-23 23:49:20,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 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) [2023-08-23 23:49:20,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 404.0) internal successors, (6060), 15 states have internal predecessors, (6060), 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) [2023-08-23 23:49:20,991 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 404.0) internal successors, (6060), 15 states have internal predecessors, (6060), 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) [2023-08-23 23:49:20,991 INFO L175 Difference]: Start difference. First operand has 88 places, 151 transitions, 1084 flow. Second operand 14 states and 2044 transitions. [2023-08-23 23:49:20,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 329 transitions, 2407 flow [2023-08-23 23:49:21,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 329 transitions, 2341 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-08-23 23:49:21,138 INFO L231 Difference]: Finished difference. Result has 106 places, 199 transitions, 1788 flow [2023-08-23 23:49:21,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1788, PETRI_PLACES=106, PETRI_TRANSITIONS=199} [2023-08-23 23:49:21,139 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2023-08-23 23:49:21,139 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 199 transitions, 1788 flow [2023-08-23 23:49:21,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 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) [2023-08-23 23:49:21,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:21,140 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, 1, 1, 1] [2023-08-23 23:49:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 23:49:21,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:21,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1893333899, now seen corresponding path program 1 times [2023-08-23 23:49:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:21,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638898447] [2023-08-23 23:49:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:21,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:22,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638898447] [2023-08-23 23:49:22,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638898447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:22,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:22,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:49:22,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595331025] [2023-08-23 23:49:22,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-23 23:49:22,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-23 23:49:22,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-23 23:49:22,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-23 23:49:22,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 199 transitions, 1788 flow. Second operand has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 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) [2023-08-23 23:49:22,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:22,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-23 23:49:22,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:25,586 INFO L124 PetriNetUnfolderBase]: 10348/15221 cut-off events. [2023-08-23 23:49:25,586 INFO L125 PetriNetUnfolderBase]: For 24990/25010 co-relation queries the response was YES. [2023-08-23 23:49:25,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47015 conditions, 15221 events. 10348/15221 cut-off events. For 24990/25010 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 80166 event pairs, 1592 based on Foata normal form. 20/13749 useless extension candidates. Maximal degree in co-relation 46370. Up to 9677 conditions per place. [2023-08-23 23:49:25,653 INFO L140 encePairwiseOnDemand]: 385/404 looper letters, 453 selfloop transitions, 298 changer transitions 0/752 dead transitions. [2023-08-23 23:49:25,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 752 transitions, 8105 flow [2023-08-23 23:49:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-23 23:49:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-23 23:49:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3306 transitions. [2023-08-23 23:49:25,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557899268187688 [2023-08-23 23:49:25,663 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3306 transitions. [2023-08-23 23:49:25,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3306 transitions. [2023-08-23 23:49:25,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:25,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3306 transitions. [2023-08-23 23:49:25,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.7391304347826) internal successors, (3306), 23 states have internal predecessors, (3306), 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) [2023-08-23 23:49:25,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 404.0) internal successors, (9696), 24 states have internal predecessors, (9696), 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) [2023-08-23 23:49:25,686 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 404.0) internal successors, (9696), 24 states have internal predecessors, (9696), 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) [2023-08-23 23:49:25,686 INFO L175 Difference]: Start difference. First operand has 106 places, 199 transitions, 1788 flow. Second operand 23 states and 3306 transitions. [2023-08-23 23:49:25,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 752 transitions, 8105 flow [2023-08-23 23:49:25,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 752 transitions, 8065 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 23:49:25,855 INFO L231 Difference]: Finished difference. Result has 132 places, 414 transitions, 5185 flow [2023-08-23 23:49:25,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5185, PETRI_PLACES=132, PETRI_TRANSITIONS=414} [2023-08-23 23:49:25,856 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2023-08-23 23:49:25,856 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 414 transitions, 5185 flow [2023-08-23 23:49:25,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 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) [2023-08-23 23:49:25,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:25,857 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, 1, 1, 1] [2023-08-23 23:49:25,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 23:49:25,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:25,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash 527367123, now seen corresponding path program 2 times [2023-08-23 23:49:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:25,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681252090] [2023-08-23 23:49:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:26,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:26,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681252090] [2023-08-23 23:49:26,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681252090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:26,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:26,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:49:26,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48058763] [2023-08-23 23:49:26,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:26,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:49:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:26,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:49:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:49:26,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-23 23:49:26,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 414 transitions, 5185 flow. Second operand has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 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) [2023-08-23 23:49:26,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:26,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-23 23:49:26,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:30,174 INFO L124 PetriNetUnfolderBase]: 11659/17176 cut-off events. [2023-08-23 23:49:30,174 INFO L125 PetriNetUnfolderBase]: For 41566/41590 co-relation queries the response was YES. [2023-08-23 23:49:30,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61573 conditions, 17176 events. 11659/17176 cut-off events. For 41566/41590 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 93284 event pairs, 2213 based on Foata normal form. 24/16522 useless extension candidates. Maximal degree in co-relation 60569. Up to 10496 conditions per place. [2023-08-23 23:49:30,281 INFO L140 encePairwiseOnDemand]: 386/404 looper letters, 307 selfloop transitions, 427 changer transitions 0/735 dead transitions. [2023-08-23 23:49:30,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 735 transitions, 9678 flow [2023-08-23 23:49:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-23 23:49:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-23 23:49:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2319 transitions. [2023-08-23 23:49:30,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587561881188119 [2023-08-23 23:49:30,289 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2319 transitions. [2023-08-23 23:49:30,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2319 transitions. [2023-08-23 23:49:30,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:30,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2319 transitions. [2023-08-23 23:49:30,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 144.9375) internal successors, (2319), 16 states have internal predecessors, (2319), 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) [2023-08-23 23:49:30,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 404.0) internal successors, (6868), 17 states have internal predecessors, (6868), 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) [2023-08-23 23:49:30,305 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 404.0) internal successors, (6868), 17 states have internal predecessors, (6868), 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) [2023-08-23 23:49:30,305 INFO L175 Difference]: Start difference. First operand has 132 places, 414 transitions, 5185 flow. Second operand 16 states and 2319 transitions. [2023-08-23 23:49:30,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 735 transitions, 9678 flow [2023-08-23 23:49:30,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 735 transitions, 9622 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-23 23:49:30,863 INFO L231 Difference]: Finished difference. Result has 154 places, 556 transitions, 8269 flow [2023-08-23 23:49:30,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=5149, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8269, PETRI_PLACES=154, PETRI_TRANSITIONS=556} [2023-08-23 23:49:30,864 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2023-08-23 23:49:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 556 transitions, 8269 flow [2023-08-23 23:49:30,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 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) [2023-08-23 23:49:30,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:30,866 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, 1, 1, 1] [2023-08-23 23:49:30,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 23:49:30,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:30,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:30,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1462617299, now seen corresponding path program 3 times [2023-08-23 23:49:30,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:30,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218700420] [2023-08-23 23:49:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:30,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:31,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:31,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218700420] [2023-08-23 23:49:31,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218700420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:31,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:31,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:49:31,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718116343] [2023-08-23 23:49:31,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:31,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:49:31,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:31,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:49:31,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:49:31,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-23 23:49:31,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 556 transitions, 8269 flow. Second operand has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 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) [2023-08-23 23:49:31,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:31,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-23 23:49:31,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:34,577 INFO L124 PetriNetUnfolderBase]: 11557/17144 cut-off events. [2023-08-23 23:49:34,577 INFO L125 PetriNetUnfolderBase]: For 53064/53108 co-relation queries the response was YES. [2023-08-23 23:49:34,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66050 conditions, 17144 events. 11557/17144 cut-off events. For 53064/53108 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 92557 event pairs, 3525 based on Foata normal form. 44/16552 useless extension candidates. Maximal degree in co-relation 63752. Up to 11304 conditions per place. [2023-08-23 23:49:34,687 INFO L140 encePairwiseOnDemand]: 390/404 looper letters, 264 selfloop transitions, 491 changer transitions 0/756 dead transitions. [2023-08-23 23:49:34,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 756 transitions, 12074 flow [2023-08-23 23:49:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-23 23:49:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-23 23:49:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1713 transitions. [2023-08-23 23:49:34,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533415841584158 [2023-08-23 23:49:34,692 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1713 transitions. [2023-08-23 23:49:34,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1713 transitions. [2023-08-23 23:49:34,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:34,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1713 transitions. [2023-08-23 23:49:34,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 142.75) internal successors, (1713), 12 states have internal predecessors, (1713), 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) [2023-08-23 23:49:34,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 404.0) internal successors, (5252), 13 states have internal predecessors, (5252), 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) [2023-08-23 23:49:34,703 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 404.0) internal successors, (5252), 13 states have internal predecessors, (5252), 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) [2023-08-23 23:49:34,703 INFO L175 Difference]: Start difference. First operand has 154 places, 556 transitions, 8269 flow. Second operand 12 states and 1713 transitions. [2023-08-23 23:49:34,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 756 transitions, 12074 flow [2023-08-23 23:49:35,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 756 transitions, 11694 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-23 23:49:35,413 INFO L231 Difference]: Finished difference. Result has 169 places, 650 transitions, 10866 flow [2023-08-23 23:49:35,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10866, PETRI_PLACES=169, PETRI_TRANSITIONS=650} [2023-08-23 23:49:35,414 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2023-08-23 23:49:35,414 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 650 transitions, 10866 flow [2023-08-23 23:49:35,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 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) [2023-08-23 23:49:35,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:35,414 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, 1, 1, 1] [2023-08-23 23:49:35,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 23:49:35,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:35,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1064228212, now seen corresponding path program 3 times [2023-08-23 23:49:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:35,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649048335] [2023-08-23 23:49:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:36,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649048335] [2023-08-23 23:49:36,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649048335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:36,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:36,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:49:36,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679734206] [2023-08-23 23:49:36,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:36,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-23 23:49:36,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:36,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-23 23:49:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-08-23 23:49:36,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-23 23:49:36,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 650 transitions, 10866 flow. Second operand has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 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) [2023-08-23 23:49:36,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:36,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-23 23:49:36,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:39,065 INFO L124 PetriNetUnfolderBase]: 11719/17410 cut-off events. [2023-08-23 23:49:39,065 INFO L125 PetriNetUnfolderBase]: For 65650/65694 co-relation queries the response was YES. [2023-08-23 23:49:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70974 conditions, 17410 events. 11719/17410 cut-off events. For 65650/65694 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 94308 event pairs, 3788 based on Foata normal form. 44/16860 useless extension candidates. Maximal degree in co-relation 69445. Up to 11198 conditions per place. [2023-08-23 23:49:39,202 INFO L140 encePairwiseOnDemand]: 390/404 looper letters, 306 selfloop transitions, 607 changer transitions 0/914 dead transitions. [2023-08-23 23:49:39,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 914 transitions, 16286 flow [2023-08-23 23:49:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-23 23:49:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-23 23:49:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1575 transitions. [2023-08-23 23:49:39,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544104410441044 [2023-08-23 23:49:39,206 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1575 transitions. [2023-08-23 23:49:39,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1575 transitions. [2023-08-23 23:49:39,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:39,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1575 transitions. [2023-08-23 23:49:39,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 143.1818181818182) internal successors, (1575), 11 states have internal predecessors, (1575), 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) [2023-08-23 23:49:39,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 404.0) internal successors, (4848), 12 states have internal predecessors, (4848), 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) [2023-08-23 23:49:39,214 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 404.0) internal successors, (4848), 12 states have internal predecessors, (4848), 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) [2023-08-23 23:49:39,215 INFO L175 Difference]: Start difference. First operand has 169 places, 650 transitions, 10866 flow. Second operand 11 states and 1575 transitions. [2023-08-23 23:49:39,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 914 transitions, 16286 flow [2023-08-23 23:49:40,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 914 transitions, 15096 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-23 23:49:40,180 INFO L231 Difference]: Finished difference. Result has 179 places, 785 transitions, 13878 flow [2023-08-23 23:49:40,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=9884, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13878, PETRI_PLACES=179, PETRI_TRANSITIONS=785} [2023-08-23 23:49:40,181 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2023-08-23 23:49:40,181 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 785 transitions, 13878 flow [2023-08-23 23:49:40,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 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) [2023-08-23 23:49:40,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:40,182 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, 1, 1, 1, 1, 1] [2023-08-23 23:49:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 23:49:40,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:40,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash 814000538, now seen corresponding path program 1 times [2023-08-23 23:49:40,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:40,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660231134] [2023-08-23 23:49:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660231134] [2023-08-23 23:49:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660231134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:49:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512235538] [2023-08-23 23:49:41,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:41,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:49:41,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:49:41,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:49:41,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:49:41,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 785 transitions, 13878 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:49:41,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:41,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:49:41,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:46,013 INFO L124 PetriNetUnfolderBase]: 15781/23065 cut-off events. [2023-08-23 23:49:46,013 INFO L125 PetriNetUnfolderBase]: For 81015/81037 co-relation queries the response was YES. [2023-08-23 23:49:46,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90845 conditions, 23065 events. 15781/23065 cut-off events. For 81015/81037 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 124967 event pairs, 2977 based on Foata normal form. 191/22114 useless extension candidates. Maximal degree in co-relation 89324. Up to 10109 conditions per place. [2023-08-23 23:49:46,154 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 851 selfloop transitions, 286 changer transitions 0/1138 dead transitions. [2023-08-23 23:49:46,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 1138 transitions, 18566 flow [2023-08-23 23:49:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-23 23:49:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-23 23:49:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2515 transitions. [2023-08-23 23:49:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34584708470847086 [2023-08-23 23:49:46,159 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2515 transitions. [2023-08-23 23:49:46,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2515 transitions. [2023-08-23 23:49:46,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:46,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2515 transitions. [2023-08-23 23:49:46,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.72222222222223) internal successors, (2515), 18 states have internal predecessors, (2515), 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) [2023-08-23 23:49:46,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:49:46,170 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:49:46,170 INFO L175 Difference]: Start difference. First operand has 179 places, 785 transitions, 13878 flow. Second operand 18 states and 2515 transitions. [2023-08-23 23:49:46,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 1138 transitions, 18566 flow [2023-08-23 23:49:47,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1138 transitions, 17890 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-23 23:49:47,334 INFO L231 Difference]: Finished difference. Result has 196 places, 810 transitions, 13949 flow [2023-08-23 23:49:47,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=13202, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13949, PETRI_PLACES=196, PETRI_TRANSITIONS=810} [2023-08-23 23:49:47,335 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2023-08-23 23:49:47,335 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 810 transitions, 13949 flow [2023-08-23 23:49:47,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:49:47,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:47,336 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, 1, 1, 1, 1, 1] [2023-08-23 23:49:47,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 23:49:47,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:47,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1729072997, now seen corresponding path program 1 times [2023-08-23 23:49:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:47,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342442306] [2023-08-23 23:49:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:47,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:48,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:48,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342442306] [2023-08-23 23:49:48,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342442306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:48,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:48,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:49:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207315334] [2023-08-23 23:49:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:49:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:48,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:49:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:49:48,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:49:48,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 810 transitions, 13949 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:49:48,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:48,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:49:48,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:49:54,570 INFO L124 PetriNetUnfolderBase]: 21539/31459 cut-off events. [2023-08-23 23:49:54,570 INFO L125 PetriNetUnfolderBase]: For 116248/116286 co-relation queries the response was YES. [2023-08-23 23:49:54,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127974 conditions, 31459 events. 21539/31459 cut-off events. For 116248/116286 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 178000 event pairs, 4448 based on Foata normal form. 458/30654 useless extension candidates. Maximal degree in co-relation 126519. Up to 17559 conditions per place. [2023-08-23 23:49:54,795 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 976 selfloop transitions, 304 changer transitions 0/1281 dead transitions. [2023-08-23 23:49:54,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1281 transitions, 21531 flow [2023-08-23 23:49:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-23 23:49:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-23 23:49:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2514 transitions. [2023-08-23 23:49:54,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457095709570957 [2023-08-23 23:49:54,798 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2514 transitions. [2023-08-23 23:49:54,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2514 transitions. [2023-08-23 23:49:54,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:49:54,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2514 transitions. [2023-08-23 23:49:54,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.66666666666666) internal successors, (2514), 18 states have internal predecessors, (2514), 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) [2023-08-23 23:49:54,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:49:54,806 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:49:54,806 INFO L175 Difference]: Start difference. First operand has 196 places, 810 transitions, 13949 flow. Second operand 18 states and 2514 transitions. [2023-08-23 23:49:54,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1281 transitions, 21531 flow [2023-08-23 23:49:56,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1281 transitions, 21149 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-23 23:49:56,825 INFO L231 Difference]: Finished difference. Result has 213 places, 894 transitions, 15555 flow [2023-08-23 23:49:56,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=13619, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15555, PETRI_PLACES=213, PETRI_TRANSITIONS=894} [2023-08-23 23:49:56,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 158 predicate places. [2023-08-23 23:49:56,826 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 894 transitions, 15555 flow [2023-08-23 23:49:56,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:49:56,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:49:56,826 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, 1, 1, 1, 1, 1] [2023-08-23 23:49:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 23:49:56,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:49:56,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:49:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash 372971985, now seen corresponding path program 2 times [2023-08-23 23:49:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:49:56,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371938672] [2023-08-23 23:49:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:49:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:49:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:49:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:49:57,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:49:57,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371938672] [2023-08-23 23:49:57,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371938672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:49:57,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:49:57,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:49:57,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899693648] [2023-08-23 23:49:57,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:49:57,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:49:57,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:49:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:49:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:49:57,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:49:57,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 894 transitions, 15555 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:49:57,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:49:57,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:49:57,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:50:05,646 INFO L124 PetriNetUnfolderBase]: 27021/39368 cut-off events. [2023-08-23 23:50:05,647 INFO L125 PetriNetUnfolderBase]: For 160151/160264 co-relation queries the response was YES. [2023-08-23 23:50:05,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166727 conditions, 39368 events. 27021/39368 cut-off events. For 160151/160264 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 231200 event pairs, 4738 based on Foata normal form. 387/38083 useless extension candidates. Maximal degree in co-relation 165268. Up to 23964 conditions per place. [2023-08-23 23:50:06,062 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 1058 selfloop transitions, 383 changer transitions 0/1442 dead transitions. [2023-08-23 23:50:06,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1442 transitions, 24040 flow [2023-08-23 23:50:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-23 23:50:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-23 23:50:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2646 transitions. [2023-08-23 23:50:06,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447107868681605 [2023-08-23 23:50:06,066 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2646 transitions. [2023-08-23 23:50:06,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2646 transitions. [2023-08-23 23:50:06,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:50:06,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2646 transitions. [2023-08-23 23:50:06,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.26315789473685) internal successors, (2646), 19 states have internal predecessors, (2646), 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) [2023-08-23 23:50:06,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 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) [2023-08-23 23:50:06,075 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 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) [2023-08-23 23:50:06,076 INFO L175 Difference]: Start difference. First operand has 213 places, 894 transitions, 15555 flow. Second operand 19 states and 2646 transitions. [2023-08-23 23:50:06,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1442 transitions, 24040 flow [2023-08-23 23:50:09,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1442 transitions, 23832 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-23 23:50:09,114 INFO L231 Difference]: Finished difference. Result has 232 places, 971 transitions, 17483 flow [2023-08-23 23:50:09,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=15347, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=17483, PETRI_PLACES=232, PETRI_TRANSITIONS=971} [2023-08-23 23:50:09,115 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2023-08-23 23:50:09,115 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 971 transitions, 17483 flow [2023-08-23 23:50:09,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:50:09,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:50:09,116 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, 1, 1, 1, 1, 1] [2023-08-23 23:50:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-23 23:50:09,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:50:09,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:50:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1967284911, now seen corresponding path program 3 times [2023-08-23 23:50:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:50:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852797763] [2023-08-23 23:50:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:50:09,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:50:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:50:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:50:10,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:50:10,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852797763] [2023-08-23 23:50:10,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852797763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:50:10,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:50:10,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:50:10,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394040784] [2023-08-23 23:50:10,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:50:10,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:50:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:50:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:50:10,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:50:10,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:50:10,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 971 transitions, 17483 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:50:10,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:50:10,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:50:10,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:50:19,397 INFO L124 PetriNetUnfolderBase]: 31241/45494 cut-off events. [2023-08-23 23:50:19,397 INFO L125 PetriNetUnfolderBase]: For 211351/211483 co-relation queries the response was YES. [2023-08-23 23:50:19,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196369 conditions, 45494 events. 31241/45494 cut-off events. For 211351/211483 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 271615 event pairs, 6057 based on Foata normal form. 406/43819 useless extension candidates. Maximal degree in co-relation 194860. Up to 27883 conditions per place. [2023-08-23 23:50:19,886 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 995 selfloop transitions, 399 changer transitions 0/1395 dead transitions. [2023-08-23 23:50:19,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1395 transitions, 23409 flow [2023-08-23 23:50:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-23 23:50:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-23 23:50:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2508 transitions. [2023-08-23 23:50:19,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448844884488449 [2023-08-23 23:50:19,889 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2508 transitions. [2023-08-23 23:50:19,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2508 transitions. [2023-08-23 23:50:19,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:50:19,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2508 transitions. [2023-08-23 23:50:19,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.33333333333334) internal successors, (2508), 18 states have internal predecessors, (2508), 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) [2023-08-23 23:50:19,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:50:19,898 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:50:19,898 INFO L175 Difference]: Start difference. First operand has 232 places, 971 transitions, 17483 flow. Second operand 18 states and 2508 transitions. [2023-08-23 23:50:19,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1395 transitions, 23409 flow [2023-08-23 23:50:23,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1395 transitions, 23096 flow, removed 101 selfloop flow, removed 5 redundant places. [2023-08-23 23:50:23,045 INFO L231 Difference]: Finished difference. Result has 247 places, 997 transitions, 18319 flow [2023-08-23 23:50:23,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=17186, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18319, PETRI_PLACES=247, PETRI_TRANSITIONS=997} [2023-08-23 23:50:23,046 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 192 predicate places. [2023-08-23 23:50:23,046 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 997 transitions, 18319 flow [2023-08-23 23:50:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:50:23,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:50:23,047 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, 1, 1, 1, 1, 1] [2023-08-23 23:50:23,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-23 23:50:23,047 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:50:23,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:50:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1197017553, now seen corresponding path program 4 times [2023-08-23 23:50:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:50:23,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955861353] [2023-08-23 23:50:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:50:23,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:50:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:50:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:50:23,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:50:23,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955861353] [2023-08-23 23:50:23,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955861353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:50:23,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:50:23,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:50:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622136150] [2023-08-23 23:50:23,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:50:23,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:50:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:50:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:50:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:50:23,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:50:23,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 997 transitions, 18319 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:50:23,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:50:23,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:50:23,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:50:33,108 INFO L124 PetriNetUnfolderBase]: 30882/45135 cut-off events. [2023-08-23 23:50:33,108 INFO L125 PetriNetUnfolderBase]: For 213433/213473 co-relation queries the response was YES. [2023-08-23 23:50:33,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194372 conditions, 45135 events. 30882/45135 cut-off events. For 213433/213473 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 269216 event pairs, 7541 based on Foata normal form. 126/43180 useless extension candidates. Maximal degree in co-relation 192827. Up to 29611 conditions per place. [2023-08-23 23:50:33,629 INFO L140 encePairwiseOnDemand]: 389/404 looper letters, 941 selfloop transitions, 380 changer transitions 0/1322 dead transitions. [2023-08-23 23:50:33,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1322 transitions, 23291 flow [2023-08-23 23:50:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-23 23:50:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-23 23:50:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2508 transitions. [2023-08-23 23:50:33,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448844884488449 [2023-08-23 23:50:33,633 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2508 transitions. [2023-08-23 23:50:33,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2508 transitions. [2023-08-23 23:50:33,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:50:33,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2508 transitions. [2023-08-23 23:50:33,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.33333333333334) internal successors, (2508), 18 states have internal predecessors, (2508), 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) [2023-08-23 23:50:33,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:50:33,640 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:50:33,640 INFO L175 Difference]: Start difference. First operand has 247 places, 997 transitions, 18319 flow. Second operand 18 states and 2508 transitions. [2023-08-23 23:50:33,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1322 transitions, 23291 flow [2023-08-23 23:50:36,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1322 transitions, 22740 flow, removed 99 selfloop flow, removed 7 redundant places. [2023-08-23 23:50:36,700 INFO L231 Difference]: Finished difference. Result has 257 places, 994 transitions, 18512 flow [2023-08-23 23:50:36,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=17752, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18512, PETRI_PLACES=257, PETRI_TRANSITIONS=994} [2023-08-23 23:50:36,701 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2023-08-23 23:50:36,701 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 994 transitions, 18512 flow [2023-08-23 23:50:36,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:50:36,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:50:36,702 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, 1, 1, 1, 1, 1] [2023-08-23 23:50:36,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-23 23:50:36,702 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:50:36,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:50:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash -43978566, now seen corresponding path program 1 times [2023-08-23 23:50:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:50:36,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916033678] [2023-08-23 23:50:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:50:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:50:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:50:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:50:37,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:50:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916033678] [2023-08-23 23:50:37,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916033678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:50:37,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:50:37,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:50:37,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573532388] [2023-08-23 23:50:37,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:50:37,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:50:37,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:50:37,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:50:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:50:37,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:50:37,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 994 transitions, 18512 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:50:37,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:50:37,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:50:37,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:50:47,200 INFO L124 PetriNetUnfolderBase]: 34450/50143 cut-off events. [2023-08-23 23:50:47,200 INFO L125 PetriNetUnfolderBase]: For 241727/241942 co-relation queries the response was YES. [2023-08-23 23:50:47,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212206 conditions, 50143 events. 34450/50143 cut-off events. For 241727/241942 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 303144 event pairs, 7902 based on Foata normal form. 798/48451 useless extension candidates. Maximal degree in co-relation 210742. Up to 35188 conditions per place. [2023-08-23 23:50:47,800 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 989 selfloop transitions, 380 changer transitions 0/1370 dead transitions. [2023-08-23 23:50:47,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1370 transitions, 24740 flow [2023-08-23 23:50:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-23 23:50:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-23 23:50:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2370 transitions. [2023-08-23 23:50:47,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34507862550960977 [2023-08-23 23:50:47,803 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2370 transitions. [2023-08-23 23:50:47,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2370 transitions. [2023-08-23 23:50:47,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:50:47,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2370 transitions. [2023-08-23 23:50:47,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.41176470588235) internal successors, (2370), 17 states have internal predecessors, (2370), 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) [2023-08-23 23:50:47,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:50:47,809 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:50:47,809 INFO L175 Difference]: Start difference. First operand has 257 places, 994 transitions, 18512 flow. Second operand 17 states and 2370 transitions. [2023-08-23 23:50:47,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1370 transitions, 24740 flow [2023-08-23 23:50:50,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1370 transitions, 23762 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-08-23 23:50:50,981 INFO L231 Difference]: Finished difference. Result has 261 places, 1016 transitions, 18856 flow [2023-08-23 23:50:50,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=17758, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18856, PETRI_PLACES=261, PETRI_TRANSITIONS=1016} [2023-08-23 23:50:50,982 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 206 predicate places. [2023-08-23 23:50:50,982 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 1016 transitions, 18856 flow [2023-08-23 23:50:50,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:50:50,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:50:50,983 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, 1, 1, 1, 1, 1] [2023-08-23 23:50:50,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-23 23:50:50,983 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:50:50,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:50:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash 81182322, now seen corresponding path program 2 times [2023-08-23 23:50:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:50:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978205828] [2023-08-23 23:50:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:50:50,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:50:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:50:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:50:51,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:50:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978205828] [2023-08-23 23:50:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978205828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:50:51,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:50:51,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:50:51,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245458108] [2023-08-23 23:50:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:50:51,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:50:51,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:50:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:50:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:50:51,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:50:51,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 1016 transitions, 18856 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:50:51,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:50:51,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:50:51,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:51:02,054 INFO L124 PetriNetUnfolderBase]: 34187/49790 cut-off events. [2023-08-23 23:51:02,054 INFO L125 PetriNetUnfolderBase]: For 261804/261930 co-relation queries the response was YES. [2023-08-23 23:51:02,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217704 conditions, 49790 events. 34187/49790 cut-off events. For 261804/261930 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 302454 event pairs, 7681 based on Foata normal form. 212/47561 useless extension candidates. Maximal degree in co-relation 216220. Up to 35419 conditions per place. [2023-08-23 23:51:02,632 INFO L140 encePairwiseOnDemand]: 389/404 looper letters, 1102 selfloop transitions, 381 changer transitions 0/1484 dead transitions. [2023-08-23 23:51:02,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1484 transitions, 26545 flow [2023-08-23 23:51:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-23 23:51:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-23 23:51:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2642 transitions. [2023-08-23 23:51:02,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34418968212610734 [2023-08-23 23:51:02,635 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2642 transitions. [2023-08-23 23:51:02,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2642 transitions. [2023-08-23 23:51:02,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:51:02,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2642 transitions. [2023-08-23 23:51:02,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.05263157894737) internal successors, (2642), 19 states have internal predecessors, (2642), 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) [2023-08-23 23:51:02,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 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) [2023-08-23 23:51:02,642 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 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) [2023-08-23 23:51:02,643 INFO L175 Difference]: Start difference. First operand has 261 places, 1016 transitions, 18856 flow. Second operand 19 states and 2642 transitions. [2023-08-23 23:51:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1484 transitions, 26545 flow [2023-08-23 23:51:06,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1484 transitions, 25950 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-23 23:51:06,359 INFO L231 Difference]: Finished difference. Result has 274 places, 1014 transitions, 19181 flow [2023-08-23 23:51:06,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=18411, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=19181, PETRI_PLACES=274, PETRI_TRANSITIONS=1014} [2023-08-23 23:51:06,361 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 219 predicate places. [2023-08-23 23:51:06,361 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1014 transitions, 19181 flow [2023-08-23 23:51:06,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:51:06,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:51:06,362 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, 1, 1, 1, 1, 1] [2023-08-23 23:51:06,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-23 23:51:06,362 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:51:06,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:51:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 522817811, now seen corresponding path program 5 times [2023-08-23 23:51:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:51:06,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016754372] [2023-08-23 23:51:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:51:06,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:51:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:51:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:51:07,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:51:07,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016754372] [2023-08-23 23:51:07,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016754372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:51:07,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:51:07,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:51:07,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729856184] [2023-08-23 23:51:07,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:51:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:51:07,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:51:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:51:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:51:07,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:51:07,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1014 transitions, 19181 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:51:07,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:51:07,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:51:07,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:51:18,803 INFO L124 PetriNetUnfolderBase]: 39346/57170 cut-off events. [2023-08-23 23:51:18,803 INFO L125 PetriNetUnfolderBase]: For 320280/320406 co-relation queries the response was YES. [2023-08-23 23:51:19,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251596 conditions, 57170 events. 39346/57170 cut-off events. For 320280/320406 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 353863 event pairs, 7332 based on Foata normal form. 400/54699 useless extension candidates. Maximal degree in co-relation 250091. Up to 35572 conditions per place. [2023-08-23 23:51:19,494 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1010 selfloop transitions, 433 changer transitions 0/1444 dead transitions. [2023-08-23 23:51:19,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1444 transitions, 25530 flow [2023-08-23 23:51:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-23 23:51:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-23 23:51:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2657 transitions. [2023-08-23 23:51:19,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3461438249088067 [2023-08-23 23:51:19,498 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2657 transitions. [2023-08-23 23:51:19,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2657 transitions. [2023-08-23 23:51:19,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:51:19,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2657 transitions. [2023-08-23 23:51:19,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.8421052631579) internal successors, (2657), 19 states have internal predecessors, (2657), 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) [2023-08-23 23:51:19,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 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) [2023-08-23 23:51:19,507 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 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) [2023-08-23 23:51:19,507 INFO L175 Difference]: Start difference. First operand has 274 places, 1014 transitions, 19181 flow. Second operand 19 states and 2657 transitions. [2023-08-23 23:51:19,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1444 transitions, 25530 flow [2023-08-23 23:51:23,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1444 transitions, 24801 flow, removed 0 selfloop flow, removed 17 redundant places. [2023-08-23 23:51:23,671 INFO L231 Difference]: Finished difference. Result has 281 places, 1048 transitions, 19971 flow [2023-08-23 23:51:23,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=18452, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=19971, PETRI_PLACES=281, PETRI_TRANSITIONS=1048} [2023-08-23 23:51:23,672 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 226 predicate places. [2023-08-23 23:51:23,672 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1048 transitions, 19971 flow [2023-08-23 23:51:23,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:51:23,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:51:23,672 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, 1, 1, 1, 1, 1] [2023-08-23 23:51:23,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-23 23:51:23,673 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:51:23,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:51:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash -962456401, now seen corresponding path program 6 times [2023-08-23 23:51:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:51:23,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835230646] [2023-08-23 23:51:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:51:23,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:51:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:51:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:51:24,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:51:24,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835230646] [2023-08-23 23:51:24,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835230646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:51:24,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:51:24,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 23:51:24,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864877969] [2023-08-23 23:51:24,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:51:24,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 23:51:24,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:51:24,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 23:51:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 23:51:24,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:51:24,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1048 transitions, 19971 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:51:24,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:51:24,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:51:24,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:51:37,571 INFO L124 PetriNetUnfolderBase]: 42592/61888 cut-off events. [2023-08-23 23:51:37,571 INFO L125 PetriNetUnfolderBase]: For 401201/401288 co-relation queries the response was YES. [2023-08-23 23:51:38,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276475 conditions, 61888 events. 42592/61888 cut-off events. For 401201/401288 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 386350 event pairs, 10719 based on Foata normal form. 361/58990 useless extension candidates. Maximal degree in co-relation 274953. Up to 47405 conditions per place. [2023-08-23 23:51:38,413 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1202 selfloop transitions, 352 changer transitions 0/1555 dead transitions. [2023-08-23 23:51:38,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1555 transitions, 29186 flow [2023-08-23 23:51:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-23 23:51:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-23 23:51:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2510 transitions. [2023-08-23 23:51:38,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34515951595159516 [2023-08-23 23:51:38,416 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2510 transitions. [2023-08-23 23:51:38,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2510 transitions. [2023-08-23 23:51:38,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:51:38,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2510 transitions. [2023-08-23 23:51:38,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.44444444444446) internal successors, (2510), 18 states have internal predecessors, (2510), 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) [2023-08-23 23:51:38,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:51:38,424 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:51:38,424 INFO L175 Difference]: Start difference. First operand has 281 places, 1048 transitions, 19971 flow. Second operand 18 states and 2510 transitions. [2023-08-23 23:51:38,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1555 transitions, 29186 flow [2023-08-23 23:51:43,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1555 transitions, 28517 flow, removed 163 selfloop flow, removed 6 redundant places. [2023-08-23 23:51:43,690 INFO L231 Difference]: Finished difference. Result has 294 places, 1065 transitions, 20306 flow [2023-08-23 23:51:43,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=19253, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=20306, PETRI_PLACES=294, PETRI_TRANSITIONS=1065} [2023-08-23 23:51:43,691 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 239 predicate places. [2023-08-23 23:51:43,691 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 1065 transitions, 20306 flow [2023-08-23 23:51:43,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 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) [2023-08-23 23:51:43,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:51:43,691 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, 1, 1, 1, 1, 1] [2023-08-23 23:51:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-23 23:51:43,691 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:51:43,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:51:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash 601648512, now seen corresponding path program 2 times [2023-08-23 23:51:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:51:43,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664336717] [2023-08-23 23:51:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:51:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:51:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:51:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:51:44,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:51:44,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664336717] [2023-08-23 23:51:44,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664336717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:51:44,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:51:44,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:51:44,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895414] [2023-08-23 23:51:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:51:44,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:51:44,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:51:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:51:44,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:51:44,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:51:44,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 1065 transitions, 20306 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:51:44,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:51:44,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:51:44,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:51:59,544 INFO L124 PetriNetUnfolderBase]: 47863/69539 cut-off events. [2023-08-23 23:51:59,544 INFO L125 PetriNetUnfolderBase]: For 472039/472318 co-relation queries the response was YES. [2023-08-23 23:52:00,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312358 conditions, 69539 events. 47863/69539 cut-off events. For 472039/472318 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 441861 event pairs, 12894 based on Foata normal form. 686/66557 useless extension candidates. Maximal degree in co-relation 310833. Up to 53870 conditions per place. [2023-08-23 23:52:01,323 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 1154 selfloop transitions, 417 changer transitions 0/1572 dead transitions. [2023-08-23 23:52:01,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1572 transitions, 29510 flow [2023-08-23 23:52:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-23 23:52:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-23 23:52:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2508 transitions. [2023-08-23 23:52:01,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448844884488449 [2023-08-23 23:52:01,344 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2508 transitions. [2023-08-23 23:52:01,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2508 transitions. [2023-08-23 23:52:01,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:52:01,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2508 transitions. [2023-08-23 23:52:01,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.33333333333334) internal successors, (2508), 18 states have internal predecessors, (2508), 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) [2023-08-23 23:52:01,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:52:01,353 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:52:01,353 INFO L175 Difference]: Start difference. First operand has 294 places, 1065 transitions, 20306 flow. Second operand 18 states and 2508 transitions. [2023-08-23 23:52:01,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1572 transitions, 29510 flow [2023-08-23 23:52:07,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1572 transitions, 28093 flow, removed 191 selfloop flow, removed 14 redundant places. [2023-08-23 23:52:07,587 INFO L231 Difference]: Finished difference. Result has 303 places, 1147 transitions, 22305 flow [2023-08-23 23:52:07,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=19477, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22305, PETRI_PLACES=303, PETRI_TRANSITIONS=1147} [2023-08-23 23:52:07,588 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 248 predicate places. [2023-08-23 23:52:07,589 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 1147 transitions, 22305 flow [2023-08-23 23:52:07,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:52:07,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:52:07,589 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, 1, 1, 1, 1, 1] [2023-08-23 23:52:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-23 23:52:07,589 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:52:07,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:52:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1357840904, now seen corresponding path program 3 times [2023-08-23 23:52:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:52:07,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417347783] [2023-08-23 23:52:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:52:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:52:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:52:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:52:08,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:52:08,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417347783] [2023-08-23 23:52:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417347783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:52:08,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:52:08,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:52:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773107087] [2023-08-23 23:52:08,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:52:08,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:52:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:52:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:52:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:52:08,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:52:08,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 1147 transitions, 22305 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:52:08,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:52:08,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:52:08,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:52:24,166 INFO L124 PetriNetUnfolderBase]: 52147/75729 cut-off events. [2023-08-23 23:52:24,166 INFO L125 PetriNetUnfolderBase]: For 570215/570506 co-relation queries the response was YES. [2023-08-23 23:52:24,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346846 conditions, 75729 events. 52147/75729 cut-off events. For 570215/570506 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 486225 event pairs, 13653 based on Foata normal form. 548/72200 useless extension candidates. Maximal degree in co-relation 345310. Up to 57848 conditions per place. [2023-08-23 23:52:25,207 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1133 selfloop transitions, 441 changer transitions 0/1575 dead transitions. [2023-08-23 23:52:25,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1575 transitions, 29099 flow [2023-08-23 23:52:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-23 23:52:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-23 23:52:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2372 transitions. [2023-08-23 23:52:25,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34536983110075714 [2023-08-23 23:52:25,210 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2372 transitions. [2023-08-23 23:52:25,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2372 transitions. [2023-08-23 23:52:25,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:52:25,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2372 transitions. [2023-08-23 23:52:25,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.52941176470588) internal successors, (2372), 17 states have internal predecessors, (2372), 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) [2023-08-23 23:52:25,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:52:25,215 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:52:25,215 INFO L175 Difference]: Start difference. First operand has 303 places, 1147 transitions, 22305 flow. Second operand 17 states and 2372 transitions. [2023-08-23 23:52:25,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1575 transitions, 29099 flow [2023-08-23 23:52:32,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1575 transitions, 28811 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-08-23 23:52:32,776 INFO L231 Difference]: Finished difference. Result has 318 places, 1173 transitions, 23422 flow [2023-08-23 23:52:32,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=22025, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23422, PETRI_PLACES=318, PETRI_TRANSITIONS=1173} [2023-08-23 23:52:32,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 263 predicate places. [2023-08-23 23:52:32,777 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 1173 transitions, 23422 flow [2023-08-23 23:52:32,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:52:32,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:52:32,777 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, 1, 1, 1, 1, 1] [2023-08-23 23:52:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-23 23:52:32,777 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:52:32,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:52:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1332005844, now seen corresponding path program 4 times [2023-08-23 23:52:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:52:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53877627] [2023-08-23 23:52:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:52:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:52:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:52:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:52:33,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:52:33,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53877627] [2023-08-23 23:52:33,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53877627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:52:33,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:52:33,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:52:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519708124] [2023-08-23 23:52:33,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:52:33,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:52:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:52:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:52:33,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:52:33,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:52:33,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1173 transitions, 23422 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:52:33,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:52:33,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:52:33,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:52:51,365 INFO L124 PetriNetUnfolderBase]: 57440/83243 cut-off events. [2023-08-23 23:52:51,366 INFO L125 PetriNetUnfolderBase]: For 716734/717025 co-relation queries the response was YES. [2023-08-23 23:52:52,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388292 conditions, 83243 events. 57440/83243 cut-off events. For 716734/717025 co-relation queries the response was YES. Maximal size of possible extension queue 1274. Compared 541696 event pairs, 14593 based on Foata normal form. 548/79284 useless extension candidates. Maximal degree in co-relation 386715. Up to 61451 conditions per place. [2023-08-23 23:52:52,613 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1142 selfloop transitions, 468 changer transitions 0/1611 dead transitions. [2023-08-23 23:52:52,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1611 transitions, 30513 flow [2023-08-23 23:52:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-23 23:52:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-23 23:52:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2521 transitions. [2023-08-23 23:52:52,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34667216721672167 [2023-08-23 23:52:52,615 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2521 transitions. [2023-08-23 23:52:52,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2521 transitions. [2023-08-23 23:52:52,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:52:52,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2521 transitions. [2023-08-23 23:52:52,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 140.05555555555554) internal successors, (2521), 18 states have internal predecessors, (2521), 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) [2023-08-23 23:52:52,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:52:52,621 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 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) [2023-08-23 23:52:52,621 INFO L175 Difference]: Start difference. First operand has 318 places, 1173 transitions, 23422 flow. Second operand 18 states and 2521 transitions. [2023-08-23 23:52:52,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1611 transitions, 30513 flow [2023-08-23 23:53:01,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1611 transitions, 29899 flow, removed 123 selfloop flow, removed 6 redundant places. [2023-08-23 23:53:01,045 INFO L231 Difference]: Finished difference. Result has 335 places, 1207 transitions, 24616 flow [2023-08-23 23:53:01,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=22832, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24616, PETRI_PLACES=335, PETRI_TRANSITIONS=1207} [2023-08-23 23:53:01,046 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 280 predicate places. [2023-08-23 23:53:01,046 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1207 transitions, 24616 flow [2023-08-23 23:53:01,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:53:01,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:01,046 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, 1, 1, 1, 1, 1] [2023-08-23 23:53:01,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-23 23:53:01,047 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:53:01,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash 198905401, now seen corresponding path program 1 times [2023-08-23 23:53:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:01,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516694700] [2023-08-23 23:53:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:01,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:01,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:01,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516694700] [2023-08-23 23:53:01,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516694700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:53:01,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:53:01,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:53:01,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965551444] [2023-08-23 23:53:01,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:53:01,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:53:01,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:01,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:53:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:53:01,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:53:01,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1207 transitions, 24616 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:53:01,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:01,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:53:01,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:22,013 INFO L124 PetriNetUnfolderBase]: 60803/88078 cut-off events. [2023-08-23 23:53:22,014 INFO L125 PetriNetUnfolderBase]: For 821300/821553 co-relation queries the response was YES. [2023-08-23 23:53:23,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419338 conditions, 88078 events. 60803/88078 cut-off events. For 821300/821553 co-relation queries the response was YES. Maximal size of possible extension queue 1391. Compared 576913 event pairs, 18389 based on Foata normal form. 371/83554 useless extension candidates. Maximal degree in co-relation 417719. Up to 71809 conditions per place. [2023-08-23 23:53:23,456 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1169 selfloop transitions, 397 changer transitions 0/1567 dead transitions. [2023-08-23 23:53:23,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1567 transitions, 31020 flow [2023-08-23 23:53:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-23 23:53:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-23 23:53:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2374 transitions. [2023-08-23 23:53:23,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456610366919045 [2023-08-23 23:53:23,459 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2374 transitions. [2023-08-23 23:53:23,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2374 transitions. [2023-08-23 23:53:23,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:23,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2374 transitions. [2023-08-23 23:53:23,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.64705882352942) internal successors, (2374), 17 states have internal predecessors, (2374), 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) [2023-08-23 23:53:23,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:53:23,467 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:53:23,467 INFO L175 Difference]: Start difference. First operand has 335 places, 1207 transitions, 24616 flow. Second operand 17 states and 2374 transitions. [2023-08-23 23:53:23,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1567 transitions, 31020 flow [2023-08-23 23:53:34,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1567 transitions, 29954 flow, removed 186 selfloop flow, removed 6 redundant places. [2023-08-23 23:53:34,155 INFO L231 Difference]: Finished difference. Result has 347 places, 1227 transitions, 24884 flow [2023-08-23 23:53:34,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=23503, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24884, PETRI_PLACES=347, PETRI_TRANSITIONS=1227} [2023-08-23 23:53:34,156 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 292 predicate places. [2023-08-23 23:53:34,156 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1227 transitions, 24884 flow [2023-08-23 23:53:34,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:53:34,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:34,157 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, 1, 1, 1, 1, 1] [2023-08-23 23:53:34,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-23 23:53:34,157 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:53:34,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash 198905402, now seen corresponding path program 5 times [2023-08-23 23:53:34,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:34,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194786818] [2023-08-23 23:53:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:34,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:34,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194786818] [2023-08-23 23:53:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194786818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:53:34,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:53:34,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-23 23:53:34,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770648678] [2023-08-23 23:53:34,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:53:34,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 23:53:34,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 23:53:34,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-23 23:53:34,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:53:34,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1227 transitions, 24884 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:53:34,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:34,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:53:34,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:55,399 INFO L124 PetriNetUnfolderBase]: 60664/87939 cut-off events. [2023-08-23 23:53:55,400 INFO L125 PetriNetUnfolderBase]: For 755730/755983 co-relation queries the response was YES. [2023-08-23 23:53:56,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411388 conditions, 87939 events. 60664/87939 cut-off events. For 755730/755983 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 576533 event pairs, 18352 based on Foata normal form. 371/83415 useless extension candidates. Maximal degree in co-relation 409779. Up to 71809 conditions per place. [2023-08-23 23:53:56,915 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1167 selfloop transitions, 395 changer transitions 0/1563 dead transitions. [2023-08-23 23:53:56,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1563 transitions, 30670 flow [2023-08-23 23:53:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-23 23:53:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-23 23:53:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2371 transitions. [2023-08-23 23:53:56,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34522422830518346 [2023-08-23 23:53:56,917 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2371 transitions. [2023-08-23 23:53:56,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2371 transitions. [2023-08-23 23:53:56,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:56,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2371 transitions. [2023-08-23 23:53:56,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.47058823529412) internal successors, (2371), 17 states have internal predecessors, (2371), 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) [2023-08-23 23:53:56,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:53:56,925 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 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) [2023-08-23 23:53:56,925 INFO L175 Difference]: Start difference. First operand has 347 places, 1227 transitions, 24884 flow. Second operand 17 states and 2371 transitions. [2023-08-23 23:53:56,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1563 transitions, 30670 flow [2023-08-23 23:54:05,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1563 transitions, 29723 flow, removed 113 selfloop flow, removed 10 redundant places. [2023-08-23 23:54:05,901 INFO L231 Difference]: Finished difference. Result has 353 places, 1224 transitions, 24582 flow [2023-08-23 23:54:05,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=23792, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24582, PETRI_PLACES=353, PETRI_TRANSITIONS=1224} [2023-08-23 23:54:05,903 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 298 predicate places. [2023-08-23 23:54:05,903 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1224 transitions, 24582 flow [2023-08-23 23:54:05,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 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) [2023-08-23 23:54:05,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:54:05,904 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:54:05,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-23 23:54:05,904 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-23 23:54:05,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:54:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2032699491, now seen corresponding path program 1 times [2023-08-23 23:54:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:54:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816396091] [2023-08-23 23:54:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:54:05,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:54:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:54:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:54:06,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:54:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816396091] [2023-08-23 23:54:06,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816396091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:54:06,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432501702] [2023-08-23 23:54:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:54:06,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:54:06,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:54:06,725 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) [2023-08-23 23:54:06,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 23:54:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:54:06,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 85 conjunts are in the unsatisfiable core [2023-08-23 23:54:06,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:54:07,016 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2023-08-23 23:54:07,025 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 [2023-08-23 23:54:07,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-23 23:54:07,065 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 [2023-08-23 23:54:07,262 INFO L322 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-23 23:54:07,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 35 [2023-08-23 23:54:07,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 23:54:07,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-08-23 23:54:07,430 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 23:54:07,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-08-23 23:54:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:54:07,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:54:08,393 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_709 (Array Int Int)) (v_ArrVal_712 Int) (v_ArrVal_710 Int)) (or (< v_ArrVal_710 1) (<= 1 (let ((.cse1 (+ |c_ULTIMATE.start_main_~#r~3#1.offset| 20))) (let ((.cse0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#writer~0#1.base| v_ArrVal_709) |c_ULTIMATE.start_main_~#r~3#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#r~3#1.offset| (* (select .cse2 .cse1) 4) 4) v_ArrVal_710)))) (select (store .cse0 .cse1 v_ArrVal_712) (+ |c_ULTIMATE.start_main_~#r~3#1.offset| (* (select .cse0 |c_ULTIMATE.start_main_~#r~3#1.offset|) 4) 4))))))) is different from false [2023-08-23 23:54:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:54:08,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432501702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:54:08,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:54:08,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2023-08-23 23:54:08,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104432492] [2023-08-23 23:54:08,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:54:08,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-23 23:54:08,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:54:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-23 23:54:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=775, Unknown=8, NotChecked=56, Total=930 [2023-08-23 23:54:08,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-23 23:54:08,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1224 transitions, 24582 flow. Second operand has 31 states, 31 states have (on average 123.06451612903226) internal successors, (3815), 31 states have internal predecessors, (3815), 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) [2023-08-23 23:54:08,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:54:08,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-23 23:54:08,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand