./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/szymanski.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i ./goblint.2024-06-19_11-23-25.files/protection/szymanski.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:48:33,580 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:48:33,647 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:48:33,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:48:33,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:48:33,678 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:48:33,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:48:33,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:48:33,680 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:48:33,682 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:48:33,683 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:48:33,683 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:48:33,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:48:33,685 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:48:33,685 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:48:33,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:48:33,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:48:33,685 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:48:33,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:48:33,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:48:33,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:48:33,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:48:33,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:48:33,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:48:33,687 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:48:33,687 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:48:33,687 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:48:33,687 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:48:33,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:48:33,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:48:33,689 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:48:33,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:48:33,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:48:33,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:48:33,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:48:33,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:48:33,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:48:33,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:48:33,690 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:48:33,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:48:33,690 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:48:33,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:48:33,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:48:33,691 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:48:33,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:48:33,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:48:33,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:48:33,885 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:48:33,886 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:48:33,886 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/szymanski.yml/witness.yml [2024-06-27 17:48:33,985 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:48:33,985 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:48:33,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-27 17:48:34,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:48:35,185 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:48:35,185 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-27 17:48:35,200 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7476d8dc1/e1a741d4f33c4696ae3391d0c3ef0de6/FLAGe4dd2a961 [2024-06-27 17:48:35,502 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7476d8dc1/e1a741d4f33c4696ae3391d0c3ef0de6 [2024-06-27 17:48:35,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:48:35,503 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:48:35,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:48:35,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:48:35,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:48:35,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:48:33" (1/2) ... [2024-06-27 17:48:35,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f0a9a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:48:35, skipping insertion in model container [2024-06-27 17:48:35,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:48:33" (1/2) ... [2024-06-27 17:48:35,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17cac967 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:48:35, skipping insertion in model container [2024-06-27 17:48:35,515 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:48:35" (2/2) ... [2024-06-27 17:48:35,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f0a9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35, skipping insertion in model container [2024-06-27 17:48:35,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:48:35" (2/2) ... [2024-06-27 17:48:35,516 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:48:35,534 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:48:35,535 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] ((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4))) && (! multithreaded || ((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4)) [2024-06-27 17:48:35,535 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4))) && (! multithreaded || ((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4)) [2024-06-27 17:48:35,536 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:48:35,536 INFO L106 edCorrectnessWitness]: ghost_update [L818-L818] multithreaded = 1; [2024-06-27 17:48:35,573 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:48:35,826 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2024-06-27 17:48:35,834 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] [2024-06-27 17:48:35,842 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:48:35,853 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:48:35,910 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2024-06-27 17:48:35,913 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:48:35,926 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:48:35,953 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:48:35,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35 WrapperNode [2024-06-27 17:48:35,953 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:48:35,954 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:48:35,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:48:35,955 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:48:35,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:35,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:35,988 INFO L138 Inliner]: procedures = 169, calls = 64, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2024-06-27 17:48:35,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:48:35,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:48:35,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:48:35,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:48:35,996 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:35,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:35,999 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,008 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:48:36,008 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,009 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,012 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,020 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,023 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,024 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:48:36,025 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:48:36,025 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:48:36,025 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:48:36,026 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (1/1) ... [2024-06-27 17:48:36,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:48:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:48:36,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:48:36,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:48:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-27 17:48:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-27 17:48:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 17:48:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 17:48:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:48:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:48:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:48:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:48:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:48:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:48:36,087 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:48:36,168 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:48:36,169 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:48:36,332 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:48:36,333 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:48:36,418 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:48:36,418 INFO L320 CfgBuilder]: Removed 8 assume(true) statements. [2024-06-27 17:48:36,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:48:36 BoogieIcfgContainer [2024-06-27 17:48:36,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:48:36,421 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:48:36,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:48:36,424 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:48:36,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:48:33" (1/4) ... [2024-06-27 17:48:36,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d378ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:48:36, skipping insertion in model container [2024-06-27 17:48:36,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:48:35" (2/4) ... [2024-06-27 17:48:36,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d378ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:48:36, skipping insertion in model container [2024-06-27 17:48:36,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:48:35" (3/4) ... [2024-06-27 17:48:36,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d378ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:48:36, skipping insertion in model container [2024-06-27 17:48:36,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:48:36" (4/4) ... [2024-06-27 17:48:36,428 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2024-06-27 17:48:36,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:48:36,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:48:36,444 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:48:36,518 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:48:36,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 75 transitions, 164 flow [2024-06-27 17:48:36,581 INFO L124 PetriNetUnfolderBase]: 12/73 cut-off events. [2024-06-27 17:48:36,582 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:48:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 12/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-06-27 17:48:36,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 75 transitions, 164 flow [2024-06-27 17:48:36,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 71 transitions, 151 flow [2024-06-27 17:48:36,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:48:36,601 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=LoopHeads, 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;@76169700, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:48:36,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 17:48:36,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:48:36,603 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:48:36,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:48:36,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:36,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:48:36,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:36,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash 279476103, now seen corresponding path program 1 times [2024-06-27 17:48:36,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:36,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185776885] [2024-06-27 17:48:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:36,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:36,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185776885] [2024-06-27 17:48:36,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185776885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:36,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:48:36,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048329393] [2024-06-27 17:48:36,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:36,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:48:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:48:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:48:36,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 75 [2024-06-27 17:48:36,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2024-06-27 17:48:36,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:36,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 75 [2024-06-27 17:48:36,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:37,184 INFO L124 PetriNetUnfolderBase]: 729/1596 cut-off events. [2024-06-27 17:48:37,185 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-06-27 17:48:37,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1596 events. 729/1596 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9935 event pairs, 366 based on Foata normal form. 69/1591 useless extension candidates. Maximal degree in co-relation 2554. Up to 980 conditions per place. [2024-06-27 17:48:37,199 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 32 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2024-06-27 17:48:37,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 232 flow [2024-06-27 17:48:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:48:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:48:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-06-27 17:48:37,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-06-27 17:48:37,211 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 151 flow. Second operand 3 states and 165 transitions. [2024-06-27 17:48:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 232 flow [2024-06-27 17:48:37,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:48:37,220 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 163 flow [2024-06-27 17:48:37,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-27 17:48:37,224 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-06-27 17:48:37,225 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 163 flow [2024-06-27 17:48:37,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2024-06-27 17:48:37,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:37,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:37,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:48:37,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:37,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2003428164, now seen corresponding path program 1 times [2024-06-27 17:48:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:37,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057555527] [2024-06-27 17:48:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:37,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:37,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:37,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057555527] [2024-06-27 17:48:37,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057555527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:37,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:37,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:48:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731509567] [2024-06-27 17:48:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:37,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:37,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:37,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-27 17:48:37,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2024-06-27 17:48:37,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:37,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-27 17:48:37,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:37,558 INFO L124 PetriNetUnfolderBase]: 775/1698 cut-off events. [2024-06-27 17:48:37,558 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-06-27 17:48:37,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1698 events. 775/1698 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10770 event pairs, 167 based on Foata normal form. 11/1654 useless extension candidates. Maximal degree in co-relation 2224. Up to 919 conditions per place. [2024-06-27 17:48:37,568 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 43 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-06-27 17:48:37,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 302 flow [2024-06-27 17:48:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:48:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:48:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-06-27 17:48:37,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-06-27 17:48:37,575 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 163 flow. Second operand 4 states and 215 transitions. [2024-06-27 17:48:37,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 302 flow [2024-06-27 17:48:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:37,578 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 194 flow [2024-06-27 17:48:37,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-27 17:48:37,579 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 4 predicate places. [2024-06-27 17:48:37,579 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 194 flow [2024-06-27 17:48:37,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2024-06-27 17:48:37,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:37,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:48:37,583 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:37,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1660336074, now seen corresponding path program 1 times [2024-06-27 17:48:37,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:37,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672610182] [2024-06-27 17:48:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:37,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:37,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:37,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672610182] [2024-06-27 17:48:37,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672610182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:37,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:37,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:48:37,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466896616] [2024-06-27 17:48:37,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:37,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:37,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:37,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:37,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-27 17:48:37,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 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) [2024-06-27 17:48:37,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:37,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-27 17:48:37,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:37,858 INFO L124 PetriNetUnfolderBase]: 779/1727 cut-off events. [2024-06-27 17:48:37,858 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2024-06-27 17:48:37,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1727 events. 779/1727 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10906 event pairs, 168 based on Foata normal form. 2/1678 useless extension candidates. Maximal degree in co-relation 2484. Up to 918 conditions per place. [2024-06-27 17:48:37,870 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 43 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-27 17:48:37,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 342 flow [2024-06-27 17:48:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:48:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:48:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-06-27 17:48:37,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-06-27 17:48:37,881 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 194 flow. Second operand 4 states and 215 transitions. [2024-06-27 17:48:37,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 342 flow [2024-06-27 17:48:37,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 335 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:37,883 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 226 flow [2024-06-27 17:48:37,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 17:48:37,884 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2024-06-27 17:48:37,884 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 226 flow [2024-06-27 17:48:37,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 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) [2024-06-27 17:48:37,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:37,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:37,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:48:37,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:37,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash 639549999, now seen corresponding path program 1 times [2024-06-27 17:48:37,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:37,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801792506] [2024-06-27 17:48:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:37,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:37,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:37,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801792506] [2024-06-27 17:48:37,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801792506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:37,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:37,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:48:37,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438242780] [2024-06-27 17:48:37,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:37,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:37,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:38,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-27 17:48:38,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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) [2024-06-27 17:48:38,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:38,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-27 17:48:38,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:38,123 INFO L124 PetriNetUnfolderBase]: 771/1641 cut-off events. [2024-06-27 17:48:38,124 INFO L125 PetriNetUnfolderBase]: For 1040/1048 co-relation queries the response was YES. [2024-06-27 17:48:38,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3401 conditions, 1641 events. 771/1641 cut-off events. For 1040/1048 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10210 event pairs, 303 based on Foata normal form. 2/1588 useless extension candidates. Maximal degree in co-relation 3120. Up to 1016 conditions per place. [2024-06-27 17:48:38,133 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 44 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2024-06-27 17:48:38,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 368 flow [2024-06-27 17:48:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:48:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:48:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2024-06-27 17:48:38,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-27 17:48:38,135 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 226 flow. Second operand 4 states and 210 transitions. [2024-06-27 17:48:38,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 368 flow [2024-06-27 17:48:38,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 361 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:38,140 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 262 flow [2024-06-27 17:48:38,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-27 17:48:38,141 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2024-06-27 17:48:38,142 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 262 flow [2024-06-27 17:48:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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) [2024-06-27 17:48:38,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:38,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:38,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:48:38,142 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:38,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:38,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1970755372, now seen corresponding path program 1 times [2024-06-27 17:48:38,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:38,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291187015] [2024-06-27 17:48:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:38,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291187015] [2024-06-27 17:48:38,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291187015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:38,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:38,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:38,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715538139] [2024-06-27 17:48:38,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:38,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:38,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:38,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 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) [2024-06-27 17:48:38,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:38,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:38,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:38,447 INFO L124 PetriNetUnfolderBase]: 872/1823 cut-off events. [2024-06-27 17:48:38,447 INFO L125 PetriNetUnfolderBase]: For 1877/1877 co-relation queries the response was YES. [2024-06-27 17:48:38,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1823 events. 872/1823 cut-off events. For 1877/1877 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11338 event pairs, 284 based on Foata normal form. 47/1811 useless extension candidates. Maximal degree in co-relation 3082. Up to 667 conditions per place. [2024-06-27 17:48:38,458 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 60 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-27 17:48:38,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 503 flow [2024-06-27 17:48:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-27 17:48:38,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-27 17:48:38,459 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 262 flow. Second operand 5 states and 267 transitions. [2024-06-27 17:48:38,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 503 flow [2024-06-27 17:48:38,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 501 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:48:38,468 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 334 flow [2024-06-27 17:48:38,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-27 17:48:38,470 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 18 predicate places. [2024-06-27 17:48:38,470 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 334 flow [2024-06-27 17:48:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 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) [2024-06-27 17:48:38,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:38,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:38,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:48:38,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:38,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1943973232, now seen corresponding path program 2 times [2024-06-27 17:48:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925751132] [2024-06-27 17:48:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:38,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:38,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:38,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925751132] [2024-06-27 17:48:38,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925751132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:38,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:38,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680947126] [2024-06-27 17:48:38,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:38,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:38,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 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) [2024-06-27 17:48:38,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:38,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:38,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:38,780 INFO L124 PetriNetUnfolderBase]: 891/1871 cut-off events. [2024-06-27 17:48:38,781 INFO L125 PetriNetUnfolderBase]: For 3047/3055 co-relation queries the response was YES. [2024-06-27 17:48:38,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4600 conditions, 1871 events. 891/1871 cut-off events. For 3047/3055 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11491 event pairs, 235 based on Foata normal form. 12/1827 useless extension candidates. Maximal degree in co-relation 4082. Up to 610 conditions per place. [2024-06-27 17:48:38,791 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 61 selfloop transitions, 15 changer transitions 0/114 dead transitions. [2024-06-27 17:48:38,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 585 flow [2024-06-27 17:48:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-27 17:48:38,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-27 17:48:38,793 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 334 flow. Second operand 5 states and 266 transitions. [2024-06-27 17:48:38,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 585 flow [2024-06-27 17:48:38,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 571 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:38,801 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 370 flow [2024-06-27 17:48:38,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-06-27 17:48:38,803 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 22 predicate places. [2024-06-27 17:48:38,804 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 370 flow [2024-06-27 17:48:38,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 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) [2024-06-27 17:48:38,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:38,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:38,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:48:38,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:38,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:38,805 INFO L85 PathProgramCache]: Analyzing trace with hash -733680217, now seen corresponding path program 1 times [2024-06-27 17:48:38,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:38,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255783053] [2024-06-27 17:48:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:38,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:38,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:38,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255783053] [2024-06-27 17:48:38,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255783053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:38,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:38,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:38,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058131537] [2024-06-27 17:48:38,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:38,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:38,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:38,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:38,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:38,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2024-06-27 17:48:38,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2024-06-27 17:48:38,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:38,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2024-06-27 17:48:38,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:39,127 INFO L124 PetriNetUnfolderBase]: 1330/3041 cut-off events. [2024-06-27 17:48:39,127 INFO L125 PetriNetUnfolderBase]: For 2604/2640 co-relation queries the response was YES. [2024-06-27 17:48:39,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 3041 events. 1330/3041 cut-off events. For 2604/2640 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 22146 event pairs, 300 based on Foata normal form. 61/2910 useless extension candidates. Maximal degree in co-relation 6135. Up to 1033 conditions per place. [2024-06-27 17:48:39,144 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 79 selfloop transitions, 20 changer transitions 1/142 dead transitions. [2024-06-27 17:48:39,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 736 flow [2024-06-27 17:48:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2024-06-27 17:48:39,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.736 [2024-06-27 17:48:39,145 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 370 flow. Second operand 5 states and 276 transitions. [2024-06-27 17:48:39,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 736 flow [2024-06-27 17:48:39,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 142 transitions, 699 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:39,151 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 491 flow [2024-06-27 17:48:39,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-27 17:48:39,152 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 27 predicate places. [2024-06-27 17:48:39,152 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 491 flow [2024-06-27 17:48:39,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2024-06-27 17:48:39,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:39,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:39,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:48:39,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:39,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1376536195, now seen corresponding path program 1 times [2024-06-27 17:48:39,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:39,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273457067] [2024-06-27 17:48:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:39,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:39,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:39,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273457067] [2024-06-27 17:48:39,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273457067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:39,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:39,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:48:39,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308042916] [2024-06-27 17:48:39,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:39,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:39,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:39,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:39,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-27 17:48:39,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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) [2024-06-27 17:48:39,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:39,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-27 17:48:39,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:39,502 INFO L124 PetriNetUnfolderBase]: 1412/2978 cut-off events. [2024-06-27 17:48:39,502 INFO L125 PetriNetUnfolderBase]: For 6697/6730 co-relation queries the response was YES. [2024-06-27 17:48:39,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 2978 events. 1412/2978 cut-off events. For 6697/6730 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 20643 event pairs, 567 based on Foata normal form. 6/2882 useless extension candidates. Maximal degree in co-relation 7402. Up to 1887 conditions per place. [2024-06-27 17:48:39,519 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 52 selfloop transitions, 9 changer transitions 0/113 dead transitions. [2024-06-27 17:48:39,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 113 transitions, 665 flow [2024-06-27 17:48:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:48:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:48:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2024-06-27 17:48:39,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 17:48:39,521 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 491 flow. Second operand 4 states and 212 transitions. [2024-06-27 17:48:39,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 113 transitions, 665 flow [2024-06-27 17:48:39,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 113 transitions, 665 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:48:39,527 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 531 flow [2024-06-27 17:48:39,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=531, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-27 17:48:39,528 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2024-06-27 17:48:39,528 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 531 flow [2024-06-27 17:48:39,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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) [2024-06-27 17:48:39,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:39,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:48:39,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:39,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash 360956095, now seen corresponding path program 1 times [2024-06-27 17:48:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:39,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947446300] [2024-06-27 17:48:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:39,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:39,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947446300] [2024-06-27 17:48:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947446300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:39,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:39,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:48:39,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983321754] [2024-06-27 17:48:39,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:39,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:39,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:39,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-27 17:48:39,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 531 flow. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 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) [2024-06-27 17:48:39,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:39,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-27 17:48:39,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:39,819 INFO L124 PetriNetUnfolderBase]: 1444/3019 cut-off events. [2024-06-27 17:48:39,819 INFO L125 PetriNetUnfolderBase]: For 9436/9466 co-relation queries the response was YES. [2024-06-27 17:48:39,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8634 conditions, 3019 events. 1444/3019 cut-off events. For 9436/9466 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 20610 event pairs, 640 based on Foata normal form. 1/2904 useless extension candidates. Maximal degree in co-relation 8389. Up to 2012 conditions per place. [2024-06-27 17:48:39,838 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 53 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2024-06-27 17:48:39,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 114 transitions, 703 flow [2024-06-27 17:48:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:48:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:48:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2024-06-27 17:48:39,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-06-27 17:48:39,840 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 531 flow. Second operand 4 states and 211 transitions. [2024-06-27 17:48:39,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 114 transitions, 703 flow [2024-06-27 17:48:39,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 114 transitions, 694 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:39,847 INFO L231 Difference]: Finished difference. Result has 100 places, 105 transitions, 564 flow [2024-06-27 17:48:39,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=564, PETRI_PLACES=100, PETRI_TRANSITIONS=105} [2024-06-27 17:48:39,848 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2024-06-27 17:48:39,848 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 105 transitions, 564 flow [2024-06-27 17:48:39,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 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) [2024-06-27 17:48:39,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:39,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:39,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:48:39,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:39,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 664495948, now seen corresponding path program 1 times [2024-06-27 17:48:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:39,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351411337] [2024-06-27 17:48:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:39,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:39,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351411337] [2024-06-27 17:48:39,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351411337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:39,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:39,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:39,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40620136] [2024-06-27 17:48:39,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:39,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:39,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:39,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 105 transitions, 564 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:39,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:39,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:39,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:40,178 INFO L124 PetriNetUnfolderBase]: 1526/3256 cut-off events. [2024-06-27 17:48:40,179 INFO L125 PetriNetUnfolderBase]: For 11439/11492 co-relation queries the response was YES. [2024-06-27 17:48:40,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9452 conditions, 3256 events. 1526/3256 cut-off events. For 11439/11492 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 22821 event pairs, 496 based on Foata normal form. 4/3144 useless extension candidates. Maximal degree in co-relation 8842. Up to 1117 conditions per place. [2024-06-27 17:48:40,201 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 69 selfloop transitions, 17 changer transitions 0/136 dead transitions. [2024-06-27 17:48:40,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 874 flow [2024-06-27 17:48:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-27 17:48:40,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-27 17:48:40,203 INFO L175 Difference]: Start difference. First operand has 100 places, 105 transitions, 564 flow. Second operand 5 states and 266 transitions. [2024-06-27 17:48:40,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 874 flow [2024-06-27 17:48:40,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 866 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:40,215 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 645 flow [2024-06-27 17:48:40,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=645, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-27 17:48:40,216 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 39 predicate places. [2024-06-27 17:48:40,217 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 645 flow [2024-06-27 17:48:40,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:40,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:40,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:40,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:48:40,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:40,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1712885632, now seen corresponding path program 2 times [2024-06-27 17:48:40,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:40,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915794037] [2024-06-27 17:48:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:40,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:40,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915794037] [2024-06-27 17:48:40,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915794037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:40,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:40,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:40,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74019212] [2024-06-27 17:48:40,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:40,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:40,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:40,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 645 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:40,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:40,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:40,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:40,552 INFO L124 PetriNetUnfolderBase]: 1561/3195 cut-off events. [2024-06-27 17:48:40,553 INFO L125 PetriNetUnfolderBase]: For 15406/15482 co-relation queries the response was YES. [2024-06-27 17:48:40,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10462 conditions, 3195 events. 1561/3195 cut-off events. For 15406/15482 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 21725 event pairs, 458 based on Foata normal form. 4/3086 useless extension candidates. Maximal degree in co-relation 9863. Up to 1028 conditions per place. [2024-06-27 17:48:40,574 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 67 selfloop transitions, 22 changer transitions 0/139 dead transitions. [2024-06-27 17:48:40,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 963 flow [2024-06-27 17:48:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-27 17:48:40,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-27 17:48:40,576 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 645 flow. Second operand 5 states and 266 transitions. [2024-06-27 17:48:40,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 963 flow [2024-06-27 17:48:40,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 953 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 17:48:40,588 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 713 flow [2024-06-27 17:48:40,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=713, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-06-27 17:48:40,589 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 44 predicate places. [2024-06-27 17:48:40,589 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 713 flow [2024-06-27 17:48:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:40,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:40,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:48:40,590 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:40,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:40,590 INFO L85 PathProgramCache]: Analyzing trace with hash 292660528, now seen corresponding path program 1 times [2024-06-27 17:48:40,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:40,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672103559] [2024-06-27 17:48:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:40,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:40,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:40,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672103559] [2024-06-27 17:48:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672103559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:40,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:40,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114121886] [2024-06-27 17:48:40,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:40,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:40,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 713 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:40,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:40,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:40,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:40,932 INFO L124 PetriNetUnfolderBase]: 1525/3218 cut-off events. [2024-06-27 17:48:40,932 INFO L125 PetriNetUnfolderBase]: For 18176/18217 co-relation queries the response was YES. [2024-06-27 17:48:40,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10579 conditions, 3218 events. 1525/3218 cut-off events. For 18176/18217 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 22533 event pairs, 490 based on Foata normal form. 12/3114 useless extension candidates. Maximal degree in co-relation 7959. Up to 1080 conditions per place. [2024-06-27 17:48:40,955 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 72 selfloop transitions, 19 changer transitions 0/141 dead transitions. [2024-06-27 17:48:40,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 141 transitions, 1027 flow [2024-06-27 17:48:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-27 17:48:40,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 17:48:40,957 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 713 flow. Second operand 5 states and 265 transitions. [2024-06-27 17:48:40,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 141 transitions, 1027 flow [2024-06-27 17:48:40,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 141 transitions, 993 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:40,971 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 748 flow [2024-06-27 17:48:40,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=748, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-27 17:48:40,971 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 47 predicate places. [2024-06-27 17:48:40,972 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 748 flow [2024-06-27 17:48:40,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:40,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:40,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:40,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:48:40,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:40,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash 315669624, now seen corresponding path program 2 times [2024-06-27 17:48:40,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:40,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260417594] [2024-06-27 17:48:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260417594] [2024-06-27 17:48:41,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260417594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:41,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:41,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:41,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802135272] [2024-06-27 17:48:41,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:41,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:41,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 748 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:41,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:41,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:41,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:41,321 INFO L124 PetriNetUnfolderBase]: 1585/3365 cut-off events. [2024-06-27 17:48:41,322 INFO L125 PetriNetUnfolderBase]: For 22080/22133 co-relation queries the response was YES. [2024-06-27 17:48:41,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11540 conditions, 3365 events. 1585/3365 cut-off events. For 22080/22133 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 23669 event pairs, 492 based on Foata normal form. 10/3290 useless extension candidates. Maximal degree in co-relation 10809. Up to 1182 conditions per place. [2024-06-27 17:48:41,344 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 76 selfloop transitions, 22 changer transitions 0/148 dead transitions. [2024-06-27 17:48:41,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 1119 flow [2024-06-27 17:48:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-27 17:48:41,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-27 17:48:41,346 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 748 flow. Second operand 5 states and 267 transitions. [2024-06-27 17:48:41,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 1119 flow [2024-06-27 17:48:41,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 148 transitions, 1090 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:41,363 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 805 flow [2024-06-27 17:48:41,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=805, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-06-27 17:48:41,364 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 50 predicate places. [2024-06-27 17:48:41,364 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 805 flow [2024-06-27 17:48:41,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:41,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:41,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:41,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:48:41,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:41,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1195118576, now seen corresponding path program 1 times [2024-06-27 17:48:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:41,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862953971] [2024-06-27 17:48:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:41,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:41,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:41,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862953971] [2024-06-27 17:48:41,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862953971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:41,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:41,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:41,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259833610] [2024-06-27 17:48:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:41,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2024-06-27 17:48:41,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 805 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-06-27 17:48:41,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:41,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2024-06-27 17:48:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:41,760 INFO L124 PetriNetUnfolderBase]: 2263/4825 cut-off events. [2024-06-27 17:48:41,760 INFO L125 PetriNetUnfolderBase]: For 16923/17260 co-relation queries the response was YES. [2024-06-27 17:48:41,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14537 conditions, 4825 events. 2263/4825 cut-off events. For 16923/17260 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 37500 event pairs, 556 based on Foata normal form. 80/4498 useless extension candidates. Maximal degree in co-relation 14231. Up to 1864 conditions per place. [2024-06-27 17:48:41,791 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 96 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-27 17:48:41,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 181 transitions, 1319 flow [2024-06-27 17:48:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 274 transitions. [2024-06-27 17:48:41,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7306666666666667 [2024-06-27 17:48:41,793 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 805 flow. Second operand 5 states and 274 transitions. [2024-06-27 17:48:41,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 181 transitions, 1319 flow [2024-06-27 17:48:41,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 181 transitions, 1291 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:41,818 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 943 flow [2024-06-27 17:48:41,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=943, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-27 17:48:41,819 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 56 predicate places. [2024-06-27 17:48:41,819 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 943 flow [2024-06-27 17:48:41,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-06-27 17:48:41,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:41,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:48:41,820 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:41,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1353068182, now seen corresponding path program 1 times [2024-06-27 17:48:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:41,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328266964] [2024-06-27 17:48:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:41,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:41,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328266964] [2024-06-27 17:48:41,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328266964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:41,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:41,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:48:41,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374202631] [2024-06-27 17:48:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:41,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:41,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-27 17:48:41,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 943 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2024-06-27 17:48:41,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:41,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-27 17:48:41,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:42,385 INFO L124 PetriNetUnfolderBase]: 2299/4918 cut-off events. [2024-06-27 17:48:42,386 INFO L125 PetriNetUnfolderBase]: For 41497/41604 co-relation queries the response was YES. [2024-06-27 17:48:42,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 4918 events. 2299/4918 cut-off events. For 41497/41604 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 38064 event pairs, 975 based on Foata normal form. 3/4805 useless extension candidates. Maximal degree in co-relation 19020. Up to 3239 conditions per place. [2024-06-27 17:48:42,417 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 67 selfloop transitions, 8 changer transitions 0/140 dead transitions. [2024-06-27 17:48:42,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 140 transitions, 1107 flow [2024-06-27 17:48:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:48:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:48:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2024-06-27 17:48:42,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-06-27 17:48:42,419 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 943 flow. Second operand 4 states and 207 transitions. [2024-06-27 17:48:42,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 140 transitions, 1107 flow [2024-06-27 17:48:42,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 140 transitions, 1107 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:48:42,448 INFO L231 Difference]: Finished difference. Result has 126 places, 134 transitions, 964 flow [2024-06-27 17:48:42,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=964, PETRI_PLACES=126, PETRI_TRANSITIONS=134} [2024-06-27 17:48:42,450 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 60 predicate places. [2024-06-27 17:48:42,450 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 134 transitions, 964 flow [2024-06-27 17:48:42,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2024-06-27 17:48:42,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:42,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:42,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:48:42,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:42,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1205678665, now seen corresponding path program 1 times [2024-06-27 17:48:42,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:42,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443346280] [2024-06-27 17:48:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:42,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443346280] [2024-06-27 17:48:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443346280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:42,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861463750] [2024-06-27 17:48:42,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:42,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:42,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:42,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 134 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:42,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:42,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:42,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:43,046 INFO L124 PetriNetUnfolderBase]: 2421/5088 cut-off events. [2024-06-27 17:48:43,046 INFO L125 PetriNetUnfolderBase]: For 47880/48002 co-relation queries the response was YES. [2024-06-27 17:48:43,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20316 conditions, 5088 events. 2421/5088 cut-off events. For 47880/48002 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 38662 event pairs, 757 based on Foata normal form. 16/5012 useless extension candidates. Maximal degree in co-relation 14394. Up to 1499 conditions per place. [2024-06-27 17:48:43,093 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 89 selfloop transitions, 18 changer transitions 0/169 dead transitions. [2024-06-27 17:48:43,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 169 transitions, 1396 flow [2024-06-27 17:48:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-06-27 17:48:43,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7146666666666667 [2024-06-27 17:48:43,095 INFO L175 Difference]: Start difference. First operand has 126 places, 134 transitions, 964 flow. Second operand 5 states and 268 transitions. [2024-06-27 17:48:43,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 169 transitions, 1396 flow [2024-06-27 17:48:43,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 169 transitions, 1366 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:48:43,254 INFO L231 Difference]: Finished difference. Result has 129 places, 140 transitions, 1064 flow [2024-06-27 17:48:43,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1064, PETRI_PLACES=129, PETRI_TRANSITIONS=140} [2024-06-27 17:48:43,254 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 63 predicate places. [2024-06-27 17:48:43,255 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 140 transitions, 1064 flow [2024-06-27 17:48:43,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:43,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:43,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:48:43,255 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:43,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash 412776755, now seen corresponding path program 2 times [2024-06-27 17:48:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:43,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948651915] [2024-06-27 17:48:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948651915] [2024-06-27 17:48:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948651915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:43,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:43,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:43,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384891304] [2024-06-27 17:48:43,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:43,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:43,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:43,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:43,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 140 transitions, 1064 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:43,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:43,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:43,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:43,813 INFO L124 PetriNetUnfolderBase]: 2451/5075 cut-off events. [2024-06-27 17:48:43,813 INFO L125 PetriNetUnfolderBase]: For 57117/57268 co-relation queries the response was YES. [2024-06-27 17:48:43,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21814 conditions, 5075 events. 2451/5075 cut-off events. For 57117/57268 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 38220 event pairs, 821 based on Foata normal form. 16/4957 useless extension candidates. Maximal degree in co-relation 15392. Up to 1641 conditions per place. [2024-06-27 17:48:43,850 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 81 selfloop transitions, 26 changer transitions 0/169 dead transitions. [2024-06-27 17:48:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 169 transitions, 1467 flow [2024-06-27 17:48:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-27 17:48:43,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-27 17:48:43,851 INFO L175 Difference]: Start difference. First operand has 129 places, 140 transitions, 1064 flow. Second operand 5 states and 267 transitions. [2024-06-27 17:48:43,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 169 transitions, 1467 flow [2024-06-27 17:48:43,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 169 transitions, 1448 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:43,899 INFO L231 Difference]: Finished difference. Result has 134 places, 144 transitions, 1178 flow [2024-06-27 17:48:43,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1178, PETRI_PLACES=134, PETRI_TRANSITIONS=144} [2024-06-27 17:48:43,900 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 68 predicate places. [2024-06-27 17:48:43,900 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 144 transitions, 1178 flow [2024-06-27 17:48:43,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:43,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:43,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:43,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:48:43,901 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:43,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 379525070, now seen corresponding path program 1 times [2024-06-27 17:48:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:43,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957654495] [2024-06-27 17:48:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:43,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:43,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:43,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957654495] [2024-06-27 17:48:43,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957654495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:43,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:48:43,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782057341] [2024-06-27 17:48:43,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:43,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:43,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:43,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:43,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-06-27 17:48:43,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 144 transitions, 1178 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-06-27 17:48:43,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:43,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-06-27 17:48:43,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:44,399 INFO L124 PetriNetUnfolderBase]: 2215/4921 cut-off events. [2024-06-27 17:48:44,400 INFO L125 PetriNetUnfolderBase]: For 29975/30417 co-relation queries the response was YES. [2024-06-27 17:48:44,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18000 conditions, 4921 events. 2215/4921 cut-off events. For 29975/30417 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 39124 event pairs, 1001 based on Foata normal form. 132/4794 useless extension candidates. Maximal degree in co-relation 13512. Up to 2637 conditions per place. [2024-06-27 17:48:44,526 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 89 selfloop transitions, 46 changer transitions 0/202 dead transitions. [2024-06-27 17:48:44,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 1787 flow [2024-06-27 17:48:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 278 transitions. [2024-06-27 17:48:44,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7413333333333333 [2024-06-27 17:48:44,528 INFO L175 Difference]: Start difference. First operand has 134 places, 144 transitions, 1178 flow. Second operand 5 states and 278 transitions. [2024-06-27 17:48:44,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 1787 flow [2024-06-27 17:48:44,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 202 transitions, 1744 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:44,582 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1549 flow [2024-06-27 17:48:44,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1549, PETRI_PLACES=139, PETRI_TRANSITIONS=174} [2024-06-27 17:48:44,583 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 73 predicate places. [2024-06-27 17:48:44,583 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1549 flow [2024-06-27 17:48:44,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-06-27 17:48:44,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:44,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:48:44,584 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:44,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash 380601483, now seen corresponding path program 1 times [2024-06-27 17:48:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:44,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908562503] [2024-06-27 17:48:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:44,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:44,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908562503] [2024-06-27 17:48:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908562503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:44,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:44,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126436323] [2024-06-27 17:48:44,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:44,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:44,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:44,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:44,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 174 transitions, 1549 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:44,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:44,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:44,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:45,286 INFO L124 PetriNetUnfolderBase]: 2721/5663 cut-off events. [2024-06-27 17:48:45,286 INFO L125 PetriNetUnfolderBase]: For 74262/74514 co-relation queries the response was YES. [2024-06-27 17:48:45,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26700 conditions, 5663 events. 2721/5663 cut-off events. For 74262/74514 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 43643 event pairs, 932 based on Foata normal form. 19/5499 useless extension candidates. Maximal degree in co-relation 19852. Up to 1904 conditions per place. [2024-06-27 17:48:45,335 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 88 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-27 17:48:45,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 1939 flow [2024-06-27 17:48:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-27 17:48:45,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 17:48:45,337 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1549 flow. Second operand 5 states and 265 transitions. [2024-06-27 17:48:45,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 1939 flow [2024-06-27 17:48:45,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 1895 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:45,424 INFO L231 Difference]: Finished difference. Result has 143 places, 175 transitions, 1581 flow [2024-06-27 17:48:45,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1581, PETRI_PLACES=143, PETRI_TRANSITIONS=175} [2024-06-27 17:48:45,424 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 77 predicate places. [2024-06-27 17:48:45,425 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 175 transitions, 1581 flow [2024-06-27 17:48:45,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:45,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:45,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:45,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:48:45,425 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:45,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1617343698, now seen corresponding path program 2 times [2024-06-27 17:48:45,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:45,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659624236] [2024-06-27 17:48:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:45,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659624236] [2024-06-27 17:48:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659624236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:45,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:45,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:45,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140191623] [2024-06-27 17:48:45,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:45,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:45,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:45,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:45,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:45,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 175 transitions, 1581 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:45,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:45,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:45,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:46,011 INFO L124 PetriNetUnfolderBase]: 2709/5689 cut-off events. [2024-06-27 17:48:46,011 INFO L125 PetriNetUnfolderBase]: For 80551/80803 co-relation queries the response was YES. [2024-06-27 17:48:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27166 conditions, 5689 events. 2709/5689 cut-off events. For 80551/80803 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 43993 event pairs, 954 based on Foata normal form. 23/5586 useless extension candidates. Maximal degree in co-relation 20146. Up to 2102 conditions per place. [2024-06-27 17:48:46,063 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 88 selfloop transitions, 32 changer transitions 0/204 dead transitions. [2024-06-27 17:48:46,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 204 transitions, 2058 flow [2024-06-27 17:48:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-27 17:48:46,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 17:48:46,065 INFO L175 Difference]: Start difference. First operand has 143 places, 175 transitions, 1581 flow. Second operand 5 states and 265 transitions. [2024-06-27 17:48:46,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 204 transitions, 2058 flow [2024-06-27 17:48:46,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 204 transitions, 2016 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:46,165 INFO L231 Difference]: Finished difference. Result has 146 places, 180 transitions, 1677 flow [2024-06-27 17:48:46,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1677, PETRI_PLACES=146, PETRI_TRANSITIONS=180} [2024-06-27 17:48:46,166 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 80 predicate places. [2024-06-27 17:48:46,166 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 180 transitions, 1677 flow [2024-06-27 17:48:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:46,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:46,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:48:46,166 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:46,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1614695058, now seen corresponding path program 3 times [2024-06-27 17:48:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:46,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167621951] [2024-06-27 17:48:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:46,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:46,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167621951] [2024-06-27 17:48:46,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167621951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:46,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:46,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443371710] [2024-06-27 17:48:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:46,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:46,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:46,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:46,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 180 transitions, 1677 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:46,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:46,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:46,848 INFO L124 PetriNetUnfolderBase]: 2664/5613 cut-off events. [2024-06-27 17:48:46,849 INFO L125 PetriNetUnfolderBase]: For 88377/88610 co-relation queries the response was YES. [2024-06-27 17:48:46,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27451 conditions, 5613 events. 2664/5613 cut-off events. For 88377/88610 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 43325 event pairs, 887 based on Foata normal form. 45/5547 useless extension candidates. Maximal degree in co-relation 20311. Up to 1903 conditions per place. [2024-06-27 17:48:46,894 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 96 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-27 17:48:46,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2202 flow [2024-06-27 17:48:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-27 17:48:46,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-27 17:48:46,895 INFO L175 Difference]: Start difference. First operand has 146 places, 180 transitions, 1677 flow. Second operand 5 states and 267 transitions. [2024-06-27 17:48:46,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2202 flow [2024-06-27 17:48:46,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 211 transitions, 2142 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:46,985 INFO L231 Difference]: Finished difference. Result has 149 places, 186 transitions, 1779 flow [2024-06-27 17:48:46,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1779, PETRI_PLACES=149, PETRI_TRANSITIONS=186} [2024-06-27 17:48:46,985 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 83 predicate places. [2024-06-27 17:48:46,985 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 186 transitions, 1779 flow [2024-06-27 17:48:46,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:46,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:46,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:46,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:48:46,986 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:46,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1766438545, now seen corresponding path program 1 times [2024-06-27 17:48:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958680017] [2024-06-27 17:48:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:47,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:47,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958680017] [2024-06-27 17:48:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958680017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:47,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:47,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:48:47,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450626784] [2024-06-27 17:48:47,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:47,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:47,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:47,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2024-06-27 17:48:47,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 186 transitions, 1779 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2024-06-27 17:48:47,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:47,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2024-06-27 17:48:47,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:47,597 INFO L124 PetriNetUnfolderBase]: 2715/5848 cut-off events. [2024-06-27 17:48:47,597 INFO L125 PetriNetUnfolderBase]: For 51702/52163 co-relation queries the response was YES. [2024-06-27 17:48:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24678 conditions, 5848 events. 2715/5848 cut-off events. For 51702/52163 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 47460 event pairs, 1216 based on Foata normal form. 146/5672 useless extension candidates. Maximal degree in co-relation 16249. Up to 3044 conditions per place. [2024-06-27 17:48:47,635 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 144 selfloop transitions, 36 changer transitions 0/246 dead transitions. [2024-06-27 17:48:47,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 246 transitions, 2684 flow [2024-06-27 17:48:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-27 17:48:47,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-27 17:48:47,637 INFO L175 Difference]: Start difference. First operand has 149 places, 186 transitions, 1779 flow. Second operand 5 states and 263 transitions. [2024-06-27 17:48:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 246 transitions, 2684 flow [2024-06-27 17:48:47,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 246 transitions, 2605 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:47,715 INFO L231 Difference]: Finished difference. Result has 155 places, 199 transitions, 2052 flow [2024-06-27 17:48:47,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2052, PETRI_PLACES=155, PETRI_TRANSITIONS=199} [2024-06-27 17:48:47,715 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 89 predicate places. [2024-06-27 17:48:47,715 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 199 transitions, 2052 flow [2024-06-27 17:48:47,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2024-06-27 17:48:47,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:47,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:48:47,716 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:47,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash 831115357, now seen corresponding path program 1 times [2024-06-27 17:48:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098685702] [2024-06-27 17:48:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:47,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:47,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098685702] [2024-06-27 17:48:47,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098685702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:47,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:47,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:47,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190464291] [2024-06-27 17:48:47,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:47,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:47,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:47,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 199 transitions, 2052 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:47,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:47,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:47,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:48,381 INFO L124 PetriNetUnfolderBase]: 2894/6144 cut-off events. [2024-06-27 17:48:48,381 INFO L125 PetriNetUnfolderBase]: For 111312/111548 co-relation queries the response was YES. [2024-06-27 17:48:48,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31370 conditions, 6144 events. 2894/6144 cut-off events. For 111312/111548 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 49182 event pairs, 1149 based on Foata normal form. 12/5972 useless extension candidates. Maximal degree in co-relation 17526. Up to 2424 conditions per place. [2024-06-27 17:48:48,430 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 103 selfloop transitions, 26 changer transitions 0/221 dead transitions. [2024-06-27 17:48:48,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 2483 flow [2024-06-27 17:48:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-06-27 17:48:48,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6986666666666667 [2024-06-27 17:48:48,431 INFO L175 Difference]: Start difference. First operand has 155 places, 199 transitions, 2052 flow. Second operand 5 states and 262 transitions. [2024-06-27 17:48:48,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 2483 flow [2024-06-27 17:48:48,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 221 transitions, 2471 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 17:48:48,546 INFO L231 Difference]: Finished difference. Result has 160 places, 200 transitions, 2119 flow [2024-06-27 17:48:48,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2119, PETRI_PLACES=160, PETRI_TRANSITIONS=200} [2024-06-27 17:48:48,547 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 94 predicate places. [2024-06-27 17:48:48,547 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 200 transitions, 2119 flow [2024-06-27 17:48:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:48,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:48,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:48,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:48:48,547 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:48,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1773693487, now seen corresponding path program 2 times [2024-06-27 17:48:48,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:48,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571384189] [2024-06-27 17:48:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:48,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571384189] [2024-06-27 17:48:48,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571384189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:48,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:48,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:48,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711054940] [2024-06-27 17:48:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:48,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:48,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:48,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:48,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:48,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 200 transitions, 2119 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:48,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:48,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:48,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:49,288 INFO L124 PetriNetUnfolderBase]: 2888/6106 cut-off events. [2024-06-27 17:48:49,288 INFO L125 PetriNetUnfolderBase]: For 122270/122524 co-relation queries the response was YES. [2024-06-27 17:48:49,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32102 conditions, 6106 events. 2888/6106 cut-off events. For 122270/122524 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 48662 event pairs, 1218 based on Foata normal form. 10/5921 useless extension candidates. Maximal degree in co-relation 17918. Up to 2426 conditions per place. [2024-06-27 17:48:49,333 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 104 selfloop transitions, 28 changer transitions 0/224 dead transitions. [2024-06-27 17:48:49,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 224 transitions, 2599 flow [2024-06-27 17:48:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-27 17:48:49,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-27 17:48:49,334 INFO L175 Difference]: Start difference. First operand has 160 places, 200 transitions, 2119 flow. Second operand 5 states and 263 transitions. [2024-06-27 17:48:49,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 224 transitions, 2599 flow [2024-06-27 17:48:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2560 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:49,454 INFO L231 Difference]: Finished difference. Result has 163 places, 203 transitions, 2203 flow [2024-06-27 17:48:49,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2203, PETRI_PLACES=163, PETRI_TRANSITIONS=203} [2024-06-27 17:48:49,454 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 97 predicate places. [2024-06-27 17:48:49,454 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 203 transitions, 2203 flow [2024-06-27 17:48:49,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:49,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:49,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:49,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:48:49,455 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:49,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1884697179, now seen corresponding path program 3 times [2024-06-27 17:48:49,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:49,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662232134] [2024-06-27 17:48:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:49,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:49,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662232134] [2024-06-27 17:48:49,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662232134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:49,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:49,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:49,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803534913] [2024-06-27 17:48:49,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:49,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:49,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:49,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:49,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:49,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 203 transitions, 2203 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:49,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:49,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:49,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:50,149 INFO L124 PetriNetUnfolderBase]: 2934/6179 cut-off events. [2024-06-27 17:48:50,149 INFO L125 PetriNetUnfolderBase]: For 132868/133145 co-relation queries the response was YES. [2024-06-27 17:48:50,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32896 conditions, 6179 events. 2934/6179 cut-off events. For 132868/133145 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48460 event pairs, 1164 based on Foata normal form. 19/6063 useless extension candidates. Maximal degree in co-relation 19654. Up to 2107 conditions per place. [2024-06-27 17:48:50,197 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 124 selfloop transitions, 17 changer transitions 0/233 dead transitions. [2024-06-27 17:48:50,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 233 transitions, 2756 flow [2024-06-27 17:48:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-27 17:48:50,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 17:48:50,199 INFO L175 Difference]: Start difference. First operand has 163 places, 203 transitions, 2203 flow. Second operand 5 states and 265 transitions. [2024-06-27 17:48:50,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 233 transitions, 2756 flow [2024-06-27 17:48:50,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 233 transitions, 2711 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:50,342 INFO L231 Difference]: Finished difference. Result has 166 places, 203 transitions, 2198 flow [2024-06-27 17:48:50,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2198, PETRI_PLACES=166, PETRI_TRANSITIONS=203} [2024-06-27 17:48:50,342 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 100 predicate places. [2024-06-27 17:48:50,342 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 203 transitions, 2198 flow [2024-06-27 17:48:50,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:50,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:50,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:50,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:48:50,343 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:50,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1753707756, now seen corresponding path program 1 times [2024-06-27 17:48:50,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:50,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011840276] [2024-06-27 17:48:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:50,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:50,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011840276] [2024-06-27 17:48:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011840276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:50,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:50,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492113651] [2024-06-27 17:48:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:50,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:50,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:50,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:50,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:50,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:50,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 203 transitions, 2198 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:50,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:50,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:50,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:51,221 INFO L124 PetriNetUnfolderBase]: 3324/6855 cut-off events. [2024-06-27 17:48:51,221 INFO L125 PetriNetUnfolderBase]: For 163926/164234 co-relation queries the response was YES. [2024-06-27 17:48:51,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37094 conditions, 6855 events. 3324/6855 cut-off events. For 163926/164234 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 54426 event pairs, 1267 based on Foata normal form. 40/6747 useless extension candidates. Maximal degree in co-relation 36610. Up to 3335 conditions per place. [2024-06-27 17:48:51,285 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 115 selfloop transitions, 23 changer transitions 1/231 dead transitions. [2024-06-27 17:48:51,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 231 transitions, 2724 flow [2024-06-27 17:48:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 261 transitions. [2024-06-27 17:48:51,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696 [2024-06-27 17:48:51,287 INFO L175 Difference]: Start difference. First operand has 166 places, 203 transitions, 2198 flow. Second operand 5 states and 261 transitions. [2024-06-27 17:48:51,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 231 transitions, 2724 flow [2024-06-27 17:48:51,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 231 transitions, 2607 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:48:51,498 INFO L231 Difference]: Finished difference. Result has 167 places, 209 transitions, 2237 flow [2024-06-27 17:48:51,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2237, PETRI_PLACES=167, PETRI_TRANSITIONS=209} [2024-06-27 17:48:51,498 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 101 predicate places. [2024-06-27 17:48:51,498 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 209 transitions, 2237 flow [2024-06-27 17:48:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2024-06-27 17:48:51,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:51,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:51,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:48:51,499 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:51,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:51,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1943668790, now seen corresponding path program 1 times [2024-06-27 17:48:51,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:51,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569920845] [2024-06-27 17:48:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:51,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:51,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569920845] [2024-06-27 17:48:51,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569920845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:51,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:51,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:51,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296038575] [2024-06-27 17:48:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:51,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:51,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:51,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:51,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 209 transitions, 2237 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:51,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:51,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:51,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:52,428 INFO L124 PetriNetUnfolderBase]: 3099/6608 cut-off events. [2024-06-27 17:48:52,428 INFO L125 PetriNetUnfolderBase]: For 176464/176725 co-relation queries the response was YES. [2024-06-27 17:48:52,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37251 conditions, 6608 events. 3099/6608 cut-off events. For 176464/176725 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 53195 event pairs, 865 based on Foata normal form. 31/6478 useless extension candidates. Maximal degree in co-relation 36858. Up to 3257 conditions per place. [2024-06-27 17:48:52,492 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 129 selfloop transitions, 16 changer transitions 2/239 dead transitions. [2024-06-27 17:48:52,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 239 transitions, 2780 flow [2024-06-27 17:48:52,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2024-06-27 17:48:52,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704 [2024-06-27 17:48:52,493 INFO L175 Difference]: Start difference. First operand has 167 places, 209 transitions, 2237 flow. Second operand 5 states and 264 transitions. [2024-06-27 17:48:52,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 239 transitions, 2780 flow [2024-06-27 17:48:52,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 239 transitions, 2756 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:52,688 INFO L231 Difference]: Finished difference. Result has 172 places, 211 transitions, 2304 flow [2024-06-27 17:48:52,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2304, PETRI_PLACES=172, PETRI_TRANSITIONS=211} [2024-06-27 17:48:52,688 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 106 predicate places. [2024-06-27 17:48:52,688 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 211 transitions, 2304 flow [2024-06-27 17:48:52,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-06-27 17:48:52,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:52,688 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] [2024-06-27 17:48:52,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:48:52,689 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:52,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash -213596841, now seen corresponding path program 1 times [2024-06-27 17:48:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:52,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011682850] [2024-06-27 17:48:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:52,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:52,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:52,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011682850] [2024-06-27 17:48:52,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011682850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:52,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:52,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:48:52,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56619565] [2024-06-27 17:48:52,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:52,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:52,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:52,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:52,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 211 transitions, 2304 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:52,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:52,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:52,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:53,627 INFO L124 PetriNetUnfolderBase]: 3315/6832 cut-off events. [2024-06-27 17:48:53,628 INFO L125 PetriNetUnfolderBase]: For 194139/194445 co-relation queries the response was YES. [2024-06-27 17:48:53,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39760 conditions, 6832 events. 3315/6832 cut-off events. For 194139/194445 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 54674 event pairs, 2044 based on Foata normal form. 13/6611 useless extension candidates. Maximal degree in co-relation 29797. Up to 4670 conditions per place. [2024-06-27 17:48:53,703 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 109 selfloop transitions, 27 changer transitions 0/228 dead transitions. [2024-06-27 17:48:53,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 228 transitions, 2698 flow [2024-06-27 17:48:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2024-06-27 17:48:53,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826666666666666 [2024-06-27 17:48:53,705 INFO L175 Difference]: Start difference. First operand has 172 places, 211 transitions, 2304 flow. Second operand 5 states and 256 transitions. [2024-06-27 17:48:53,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 228 transitions, 2698 flow [2024-06-27 17:48:53,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 228 transitions, 2685 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:48:53,953 INFO L231 Difference]: Finished difference. Result has 176 places, 213 transitions, 2377 flow [2024-06-27 17:48:53,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2377, PETRI_PLACES=176, PETRI_TRANSITIONS=213} [2024-06-27 17:48:53,953 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 110 predicate places. [2024-06-27 17:48:53,954 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 213 transitions, 2377 flow [2024-06-27 17:48:53,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:53,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:53,954 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] [2024-06-27 17:48:53,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:48:53,954 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:53,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1701642415, now seen corresponding path program 2 times [2024-06-27 17:48:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:53,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818139743] [2024-06-27 17:48:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:53,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818139743] [2024-06-27 17:48:53,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818139743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:53,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:53,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:48:53,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135793372] [2024-06-27 17:48:53,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:53,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:54,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:54,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 213 transitions, 2377 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:54,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:54,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:54,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:54,854 INFO L124 PetriNetUnfolderBase]: 3406/7060 cut-off events. [2024-06-27 17:48:54,854 INFO L125 PetriNetUnfolderBase]: For 208214/208526 co-relation queries the response was YES. [2024-06-27 17:48:54,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41536 conditions, 7060 events. 3406/7060 cut-off events. For 208214/208526 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 56216 event pairs, 1527 based on Foata normal form. 28/6933 useless extension candidates. Maximal degree in co-relation 31359. Up to 2921 conditions per place. [2024-06-27 17:48:54,916 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 132 selfloop transitions, 24 changer transitions 0/248 dead transitions. [2024-06-27 17:48:54,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 248 transitions, 3086 flow [2024-06-27 17:48:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-06-27 17:48:54,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6906666666666667 [2024-06-27 17:48:54,917 INFO L175 Difference]: Start difference. First operand has 176 places, 213 transitions, 2377 flow. Second operand 5 states and 259 transitions. [2024-06-27 17:48:54,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 248 transitions, 3086 flow [2024-06-27 17:48:55,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 248 transitions, 3048 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:48:55,157 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 2477 flow [2024-06-27 17:48:55,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2477, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2024-06-27 17:48:55,158 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 113 predicate places. [2024-06-27 17:48:55,158 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 2477 flow [2024-06-27 17:48:55,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:55,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:55,159 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] [2024-06-27 17:48:55,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:48:55,159 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:55,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1686061195, now seen corresponding path program 3 times [2024-06-27 17:48:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:55,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544391049] [2024-06-27 17:48:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:55,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:55,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544391049] [2024-06-27 17:48:55,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544391049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:55,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:55,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:48:55,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151244278] [2024-06-27 17:48:55,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:55,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:55,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:55,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 2477 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:55,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:55,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:55,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:56,010 INFO L124 PetriNetUnfolderBase]: 3174/6627 cut-off events. [2024-06-27 17:48:56,011 INFO L125 PetriNetUnfolderBase]: For 211337/211648 co-relation queries the response was YES. [2024-06-27 17:48:56,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40042 conditions, 6627 events. 3174/6627 cut-off events. For 211337/211648 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 52353 event pairs, 1398 based on Foata normal form. 158/6641 useless extension candidates. Maximal degree in co-relation 30697. Up to 2915 conditions per place. [2024-06-27 17:48:56,074 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 135 selfloop transitions, 28 changer transitions 0/255 dead transitions. [2024-06-27 17:48:56,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 255 transitions, 3185 flow [2024-06-27 17:48:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-06-27 17:48:56,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7146666666666667 [2024-06-27 17:48:56,076 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 2477 flow. Second operand 5 states and 268 transitions. [2024-06-27 17:48:56,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 255 transitions, 3185 flow [2024-06-27 17:48:56,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 255 transitions, 3165 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 17:48:56,341 INFO L231 Difference]: Finished difference. Result has 185 places, 221 transitions, 2567 flow [2024-06-27 17:48:56,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2567, PETRI_PLACES=185, PETRI_TRANSITIONS=221} [2024-06-27 17:48:56,342 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 119 predicate places. [2024-06-27 17:48:56,342 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 221 transitions, 2567 flow [2024-06-27 17:48:56,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-06-27 17:48:56,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:56,343 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] [2024-06-27 17:48:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:48:56,343 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:56,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1564046821, now seen corresponding path program 1 times [2024-06-27 17:48:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:56,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377229659] [2024-06-27 17:48:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:56,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377229659] [2024-06-27 17:48:56,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377229659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:56,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:56,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:48:56,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106650823] [2024-06-27 17:48:56,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:56,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:56,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:56,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2024-06-27 17:48:56,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 221 transitions, 2567 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-06-27 17:48:56,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:56,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2024-06-27 17:48:56,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:57,002 INFO L124 PetriNetUnfolderBase]: 2572/5640 cut-off events. [2024-06-27 17:48:57,003 INFO L125 PetriNetUnfolderBase]: For 103357/103947 co-relation queries the response was YES. [2024-06-27 17:48:57,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28561 conditions, 5640 events. 2572/5640 cut-off events. For 103357/103947 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 44946 event pairs, 986 based on Foata normal form. 109/5441 useless extension candidates. Maximal degree in co-relation 20483. Up to 2175 conditions per place. [2024-06-27 17:48:57,050 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 147 selfloop transitions, 58 changer transitions 0/278 dead transitions. [2024-06-27 17:48:57,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 278 transitions, 3412 flow [2024-06-27 17:48:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 271 transitions. [2024-06-27 17:48:57,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7226666666666667 [2024-06-27 17:48:57,051 INFO L175 Difference]: Start difference. First operand has 185 places, 221 transitions, 2567 flow. Second operand 5 states and 271 transitions. [2024-06-27 17:48:57,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 278 transitions, 3412 flow [2024-06-27 17:48:57,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 278 transitions, 3372 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:48:57,192 INFO L231 Difference]: Finished difference. Result has 190 places, 250 transitions, 3109 flow [2024-06-27 17:48:57,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3109, PETRI_PLACES=190, PETRI_TRANSITIONS=250} [2024-06-27 17:48:57,193 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 124 predicate places. [2024-06-27 17:48:57,193 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 250 transitions, 3109 flow [2024-06-27 17:48:57,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-06-27 17:48:57,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:57,193 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] [2024-06-27 17:48:57,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:48:57,194 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:57,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash -213020445, now seen corresponding path program 1 times [2024-06-27 17:48:57,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:57,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656011906] [2024-06-27 17:48:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:57,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:57,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:57,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656011906] [2024-06-27 17:48:57,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656011906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:57,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:57,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:57,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802219540] [2024-06-27 17:48:57,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:57,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:57,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:57,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:57,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 250 transitions, 3109 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:48:57,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:57,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:57,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:58,074 INFO L124 PetriNetUnfolderBase]: 2928/6164 cut-off events. [2024-06-27 17:48:58,074 INFO L125 PetriNetUnfolderBase]: For 223372/223742 co-relation queries the response was YES. [2024-06-27 17:48:58,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39950 conditions, 6164 events. 2928/6164 cut-off events. For 223372/223742 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 47949 event pairs, 1229 based on Foata normal form. 33/6021 useless extension candidates. Maximal degree in co-relation 27360. Up to 2554 conditions per place. [2024-06-27 17:48:58,120 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 131 selfloop transitions, 28 changer transitions 0/275 dead transitions. [2024-06-27 17:48:58,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 275 transitions, 3755 flow [2024-06-27 17:48:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 261 transitions. [2024-06-27 17:48:58,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696 [2024-06-27 17:48:58,123 INFO L175 Difference]: Start difference. First operand has 190 places, 250 transitions, 3109 flow. Second operand 5 states and 261 transitions. [2024-06-27 17:48:58,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 275 transitions, 3755 flow [2024-06-27 17:48:58,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 275 transitions, 3683 flow, removed 36 selfloop flow, removed 0 redundant places. [2024-06-27 17:48:58,342 INFO L231 Difference]: Finished difference. Result has 195 places, 254 transitions, 3170 flow [2024-06-27 17:48:58,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3170, PETRI_PLACES=195, PETRI_TRANSITIONS=254} [2024-06-27 17:48:58,342 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 129 predicate places. [2024-06-27 17:48:58,342 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 254 transitions, 3170 flow [2024-06-27 17:48:58,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:48:58,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:58,342 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] [2024-06-27 17:48:58,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:48:58,343 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:58,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:58,343 INFO L85 PathProgramCache]: Analyzing trace with hash 609554495, now seen corresponding path program 2 times [2024-06-27 17:48:58,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:58,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627847846] [2024-06-27 17:48:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:58,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:58,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:58,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627847846] [2024-06-27 17:48:58,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627847846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:58,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:58,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:48:58,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724237121] [2024-06-27 17:48:58,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:58,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:48:58,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:58,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:48:58,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:48:58,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2024-06-27 17:48:58,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 254 transitions, 3170 flow. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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) [2024-06-27 17:48:58,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:58,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2024-06-27 17:48:58,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:59,032 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([368] L749-1-->L756: Formula: (= v_~flag1~0_11 0) InVars {} OutVars{~flag1~0=v_~flag1~0_11} AuxVars[] AssignedVars[~flag1~0][224], [Black: 257#(and (= ~flag2~0 4) (= ~flag1~0 1) (= ~x~0 1)), 154#(<= ~flag1~0 0), Black: 130#(and (= ~x~0 0) (= ~flag1~0 3)), Black: 131#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 3)), Black: 263#(and (= ~flag2~0 4) (= ~flag1~0 1) (= ~x~0 1)), Black: 138#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 3)), 239#(= ~flag1~0 0), Black: 268#(and (= ~flag2~0 4) (= ~x~0 1)), Black: 269#(and (= ~flag2~0 4) (= ~flag1~0 1) (= ~x~0 1)), Black: 144#(and (= ~x~0 0) (= ~flag1~0 1) (= ~flag2~0 3)), Black: 150#(and (= ~x~0 0) (= ~flag1~0 1) (= ~flag2~0 3)), Black: 277#(and (= ~flag1~0 4) (= thr2Thread1of1ForFork1_~f12~0 4)), Black: 274#(= ~flag1~0 4), Black: 272#true, 142#(= ~x~0 0), 285#(= ~x~0 0), Black: 157#(and (<= ~flag1~0 0) (<= thr2Thread1of1ForFork1_~f12~0 0)), 261#(= ~flag2~0 4), Black: 287#(and (= ~x~0 0) (= 2 ~flag1~0) (= ~flag2~0 3)), Black: 155#(<= thr2Thread1of1ForFork1_~f12~0 0), 289#true, Black: 164#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 4)), 148#(= ~x~0 0), 108#true, Black: 170#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 4)), Black: 169#(and (= ~x~0 0) (= ~flag1~0 4)), Black: 177#(and (= ~x~0 0) (= ~flag2~0 1)), Black: 178#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 4)), 31#L799true, Black: 183#(= ~flag1~0 3), Black: 186#(and (= 3 thr2Thread1of1ForFork1_~f12~0) (= ~flag1~0 3)), Black: 184#(= 3 thr2Thread1of1ForFork1_~f12~0), Black: 195#(and (= ~x~0 0) (= ~flag2~0 1) (= 2 ~flag1~0)), 88#true, thr2Thread1of1ForFork1InUse, Black: 201#(and (= ~x~0 0) (= ~flag2~0 3) (= ~flag1~0 3)), Black: 75#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 0)), 275#(= thr2Thread1of1ForFork1_~f12~0 4), 209#true, Black: 207#(and (= ~x~0 0) (= ~flag2~0 3) (= ~flag1~0 3)), Black: 80#(and (= ~x~0 0) (= ~flag1~0 1) (= ~flag2~0 0)), Black: 211#(= ~flag1~0 1), Black: 86#(and (= ~x~0 0) (= ~flag1~0 3) (= ~flag2~0 0)), Black: 214#(and (= thr2Thread1of1ForFork1_~f12~0 1) (= ~flag1~0 1)), 168#(= ~x~0 0), Black: 212#(= thr2Thread1of1ForFork1_~f12~0 1), Black: 90#(and (= ~flag1~0 0) (= ~x~0 0)), Black: 91#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 1)), Black: 223#(and (= ~x~0 0) (= ~flag1~0 1) (= 2 ~flag2~0)), Black: 98#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 1)), Black: 94#true, 29#ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANTtrue, Black: 229#(and (= ~x~0 0) (= ~flag2~0 4) (= ~flag1~0 1)), Black: 106#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 1)), 234#(and (= ~x~0 0) (= ~flag2~0 4)), Black: 235#(and (= ~x~0 0) (= ~flag2~0 4) (= ~flag1~0 1)), 267#(= ~flag2~0 4), 17#L756true, Black: 240#(and (= ~flag1~0 0) (= ~flag2~0 4)), Black: 111#(= thr1Thread1of1ForFork0_~f21~0 0), Black: 113#(and (= thr1Thread1of1ForFork0_~f21~0 0) (= ~flag2~0 0)), Black: 241#(and (= ~flag1~0 0) (= ~flag2~0 4) (= ~x~0 1)), Black: 110#(= ~flag2~0 0), Black: 120#(and (= ~x~0 0) (= ~flag1~0 4) (= ~flag2~0 0)), Black: 248#(and (= ~x~0 0) (= ~flag2~0 0)), 129#(= ~x~0 0), Black: 249#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 0)), Black: 125#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 3))]) [2024-06-27 17:48:59,033 INFO L294 olderBase$Statistics]: this new event has 34 ancestors and is cut-off event [2024-06-27 17:48:59,033 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-06-27 17:48:59,033 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-06-27 17:48:59,033 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-06-27 17:48:59,208 INFO L124 PetriNetUnfolderBase]: 2928/6131 cut-off events. [2024-06-27 17:48:59,209 INFO L125 PetriNetUnfolderBase]: For 134067/134885 co-relation queries the response was YES. [2024-06-27 17:48:59,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33887 conditions, 6131 events. 2928/6131 cut-off events. For 134067/134885 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 48187 event pairs, 1498 based on Foata normal form. 129/5861 useless extension candidates. Maximal degree in co-relation 23388. Up to 3679 conditions per place. [2024-06-27 17:48:59,261 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 111 selfloop transitions, 26 changer transitions 1/298 dead transitions. [2024-06-27 17:48:59,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 298 transitions, 3753 flow [2024-06-27 17:48:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:48:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:48:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-06-27 17:48:59,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6853333333333333 [2024-06-27 17:48:59,262 INFO L175 Difference]: Start difference. First operand has 195 places, 254 transitions, 3170 flow. Second operand 5 states and 257 transitions. [2024-06-27 17:48:59,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 298 transitions, 3753 flow [2024-06-27 17:48:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 298 transitions, 3645 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 17:48:59,468 INFO L231 Difference]: Finished difference. Result has 200 places, 258 transitions, 3195 flow [2024-06-27 17:48:59,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3195, PETRI_PLACES=200, PETRI_TRANSITIONS=258} [2024-06-27 17:48:59,468 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 134 predicate places. [2024-06-27 17:48:59,468 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 258 transitions, 3195 flow [2024-06-27 17:48:59,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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) [2024-06-27 17:48:59,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:59,469 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] [2024-06-27 17:48:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:48:59,469 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:48:59,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1930488173, now seen corresponding path program 3 times [2024-06-27 17:48:59,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499453302] [2024-06-27 17:48:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499453302] [2024-06-27 17:48:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499453302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:48:59,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:48:59,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:48:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914494355] [2024-06-27 17:48:59,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:48:59,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:48:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:48:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:48:59,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:48:59,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 258 transitions, 3195 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:48:59,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:59,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:48:59,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:00,335 INFO L124 PetriNetUnfolderBase]: 2857/6192 cut-off events. [2024-06-27 17:49:00,335 INFO L125 PetriNetUnfolderBase]: For 242259/242617 co-relation queries the response was YES. [2024-06-27 17:49:00,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 6192 events. 2857/6192 cut-off events. For 242259/242617 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 49433 event pairs, 1088 based on Foata normal form. 45/6060 useless extension candidates. Maximal degree in co-relation 31043. Up to 2322 conditions per place. [2024-06-27 17:49:00,395 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 120 selfloop transitions, 44 changer transitions 0/285 dead transitions. [2024-06-27 17:49:00,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 285 transitions, 3849 flow [2024-06-27 17:49:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2024-06-27 17:49:00,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704 [2024-06-27 17:49:00,396 INFO L175 Difference]: Start difference. First operand has 200 places, 258 transitions, 3195 flow. Second operand 5 states and 264 transitions. [2024-06-27 17:49:00,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 285 transitions, 3849 flow [2024-06-27 17:49:00,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 285 transitions, 3845 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:00,741 INFO L231 Difference]: Finished difference. Result has 206 places, 264 transitions, 3437 flow [2024-06-27 17:49:00,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3437, PETRI_PLACES=206, PETRI_TRANSITIONS=264} [2024-06-27 17:49:00,742 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 140 predicate places. [2024-06-27 17:49:00,742 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 264 transitions, 3437 flow [2024-06-27 17:49:00,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:00,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:00,743 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] [2024-06-27 17:49:00,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:49:00,743 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:00,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -277146627, now seen corresponding path program 1 times [2024-06-27 17:49:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054296274] [2024-06-27 17:49:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054296274] [2024-06-27 17:49:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054296274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:00,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:00,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:00,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267717670] [2024-06-27 17:49:00,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:00,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:00,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:00,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:00,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:00,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 264 transitions, 3437 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:00,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:00,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:00,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:01,781 INFO L124 PetriNetUnfolderBase]: 2929/6350 cut-off events. [2024-06-27 17:49:01,783 INFO L125 PetriNetUnfolderBase]: For 255918/256299 co-relation queries the response was YES. [2024-06-27 17:49:01,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43275 conditions, 6350 events. 2929/6350 cut-off events. For 255918/256299 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 50810 event pairs, 1155 based on Foata normal form. 32/6213 useless extension candidates. Maximal degree in co-relation 32642. Up to 2569 conditions per place. [2024-06-27 17:49:01,844 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 117 selfloop transitions, 49 changer transitions 0/287 dead transitions. [2024-06-27 17:49:01,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 287 transitions, 4066 flow [2024-06-27 17:49:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-06-27 17:49:01,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6986666666666667 [2024-06-27 17:49:01,845 INFO L175 Difference]: Start difference. First operand has 206 places, 264 transitions, 3437 flow. Second operand 5 states and 262 transitions. [2024-06-27 17:49:01,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 287 transitions, 4066 flow [2024-06-27 17:49:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 287 transitions, 3990 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:02,126 INFO L231 Difference]: Finished difference. Result has 209 places, 268 transitions, 3542 flow [2024-06-27 17:49:02,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3542, PETRI_PLACES=209, PETRI_TRANSITIONS=268} [2024-06-27 17:49:02,126 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 143 predicate places. [2024-06-27 17:49:02,127 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 268 transitions, 3542 flow [2024-06-27 17:49:02,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:02,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:02,127 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] [2024-06-27 17:49:02,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:49:02,127 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:02,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash -277978047, now seen corresponding path program 2 times [2024-06-27 17:49:02,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:02,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544003553] [2024-06-27 17:49:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:02,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:02,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544003553] [2024-06-27 17:49:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544003553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:02,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:02,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445615766] [2024-06-27 17:49:02,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:02,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:02,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 268 transitions, 3542 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:02,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:02,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:02,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:03,069 INFO L124 PetriNetUnfolderBase]: 2882/6257 cut-off events. [2024-06-27 17:49:03,069 INFO L125 PetriNetUnfolderBase]: For 267952/268278 co-relation queries the response was YES. [2024-06-27 17:49:03,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42907 conditions, 6257 events. 2882/6257 cut-off events. For 267952/268278 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 49891 event pairs, 1161 based on Foata normal form. 27/6123 useless extension candidates. Maximal degree in co-relation 32208. Up to 2376 conditions per place. [2024-06-27 17:49:03,134 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 152 selfloop transitions, 24 changer transitions 0/297 dead transitions. [2024-06-27 17:49:03,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 297 transitions, 4286 flow [2024-06-27 17:49:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-27 17:49:03,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-27 17:49:03,135 INFO L175 Difference]: Start difference. First operand has 209 places, 268 transitions, 3542 flow. Second operand 5 states and 263 transitions. [2024-06-27 17:49:03,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 297 transitions, 4286 flow [2024-06-27 17:49:03,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 297 transitions, 4200 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:03,517 INFO L231 Difference]: Finished difference. Result has 212 places, 272 transitions, 3603 flow [2024-06-27 17:49:03,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3603, PETRI_PLACES=212, PETRI_TRANSITIONS=272} [2024-06-27 17:49:03,517 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 146 predicate places. [2024-06-27 17:49:03,517 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 272 transitions, 3603 flow [2024-06-27 17:49:03,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:03,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:03,518 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] [2024-06-27 17:49:03,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:49:03,518 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:03,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 579941435, now seen corresponding path program 1 times [2024-06-27 17:49:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:03,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970674848] [2024-06-27 17:49:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:03,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:03,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:03,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970674848] [2024-06-27 17:49:03,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970674848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:03,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:03,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:03,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971746348] [2024-06-27 17:49:03,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:03,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:03,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:03,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:03,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:03,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:03,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 272 transitions, 3603 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:03,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:03,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:03,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:04,441 INFO L124 PetriNetUnfolderBase]: 2900/6278 cut-off events. [2024-06-27 17:49:04,441 INFO L125 PetriNetUnfolderBase]: For 282537/282911 co-relation queries the response was YES. [2024-06-27 17:49:04,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43497 conditions, 6278 events. 2900/6278 cut-off events. For 282537/282911 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 50057 event pairs, 1179 based on Foata normal form. 25/6136 useless extension candidates. Maximal degree in co-relation 32663. Up to 2563 conditions per place. [2024-06-27 17:49:04,502 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 116 selfloop transitions, 58 changer transitions 0/295 dead transitions. [2024-06-27 17:49:04,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 295 transitions, 4268 flow [2024-06-27 17:49:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-06-27 17:49:04,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6986666666666667 [2024-06-27 17:49:04,503 INFO L175 Difference]: Start difference. First operand has 212 places, 272 transitions, 3603 flow. Second operand 5 states and 262 transitions. [2024-06-27 17:49:04,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 295 transitions, 4268 flow [2024-06-27 17:49:04,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 295 transitions, 4175 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:04,906 INFO L231 Difference]: Finished difference. Result has 214 places, 276 transitions, 3722 flow [2024-06-27 17:49:04,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3722, PETRI_PLACES=214, PETRI_TRANSITIONS=276} [2024-06-27 17:49:04,906 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 148 predicate places. [2024-06-27 17:49:04,906 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 276 transitions, 3722 flow [2024-06-27 17:49:04,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:04,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:04,907 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] [2024-06-27 17:49:04,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:49:04,907 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:04,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:04,907 INFO L85 PathProgramCache]: Analyzing trace with hash 608569563, now seen corresponding path program 2 times [2024-06-27 17:49:04,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:04,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996409185] [2024-06-27 17:49:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:04,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:04,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996409185] [2024-06-27 17:49:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996409185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:04,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51641532] [2024-06-27 17:49:04,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:04,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:04,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 276 transitions, 3722 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:04,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:04,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:04,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:05,966 INFO L124 PetriNetUnfolderBase]: 2805/6092 cut-off events. [2024-06-27 17:49:05,966 INFO L125 PetriNetUnfolderBase]: For 292835/293168 co-relation queries the response was YES. [2024-06-27 17:49:06,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42587 conditions, 6092 events. 2805/6092 cut-off events. For 292835/293168 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 48413 event pairs, 1079 based on Foata normal form. 36/5962 useless extension candidates. Maximal degree in co-relation 31854. Up to 2280 conditions per place. [2024-06-27 17:49:06,040 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 137 selfloop transitions, 41 changer transitions 0/299 dead transitions. [2024-06-27 17:49:06,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 299 transitions, 4335 flow [2024-06-27 17:49:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-27 17:49:06,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-27 17:49:06,041 INFO L175 Difference]: Start difference. First operand has 214 places, 276 transitions, 3722 flow. Second operand 5 states and 266 transitions. [2024-06-27 17:49:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 299 transitions, 4335 flow [2024-06-27 17:49:06,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 299 transitions, 4237 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:06,534 INFO L231 Difference]: Finished difference. Result has 217 places, 277 transitions, 3728 flow [2024-06-27 17:49:06,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3728, PETRI_PLACES=217, PETRI_TRANSITIONS=277} [2024-06-27 17:49:06,534 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 151 predicate places. [2024-06-27 17:49:06,534 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 277 transitions, 3728 flow [2024-06-27 17:49:06,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:06,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:06,534 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] [2024-06-27 17:49:06,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:49:06,535 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:06,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:06,535 INFO L85 PathProgramCache]: Analyzing trace with hash -928898769, now seen corresponding path program 2 times [2024-06-27 17:49:06,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:06,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617439315] [2024-06-27 17:49:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:06,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617439315] [2024-06-27 17:49:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617439315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:06,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:06,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:06,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733135773] [2024-06-27 17:49:06,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:06,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:06,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:06,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2024-06-27 17:49:06,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 277 transitions, 3728 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-06-27 17:49:06,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:06,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2024-06-27 17:49:06,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:07,328 INFO L124 PetriNetUnfolderBase]: 1922/4246 cut-off events. [2024-06-27 17:49:07,328 INFO L125 PetriNetUnfolderBase]: For 115005/115395 co-relation queries the response was YES. [2024-06-27 17:49:07,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25458 conditions, 4246 events. 1922/4246 cut-off events. For 115005/115395 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 32049 event pairs, 660 based on Foata normal form. 159/4226 useless extension candidates. Maximal degree in co-relation 21434. Up to 1660 conditions per place. [2024-06-27 17:49:07,376 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 110 selfloop transitions, 42 changer transitions 1/303 dead transitions. [2024-06-27 17:49:07,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 303 transitions, 4156 flow [2024-06-27 17:49:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 269 transitions. [2024-06-27 17:49:07,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2024-06-27 17:49:07,377 INFO L175 Difference]: Start difference. First operand has 217 places, 277 transitions, 3728 flow. Second operand 5 states and 269 transitions. [2024-06-27 17:49:07,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 303 transitions, 4156 flow [2024-06-27 17:49:07,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 303 transitions, 3961 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:07,671 INFO L231 Difference]: Finished difference. Result has 215 places, 269 transitions, 3628 flow [2024-06-27 17:49:07,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3628, PETRI_PLACES=215, PETRI_TRANSITIONS=269} [2024-06-27 17:49:07,672 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 149 predicate places. [2024-06-27 17:49:07,672 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 269 transitions, 3628 flow [2024-06-27 17:49:07,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-06-27 17:49:07,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:07,672 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] [2024-06-27 17:49:07,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:49:07,672 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:07,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash -857755619, now seen corresponding path program 3 times [2024-06-27 17:49:07,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:07,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084897873] [2024-06-27 17:49:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:07,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:07,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084897873] [2024-06-27 17:49:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084897873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:07,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:07,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967134405] [2024-06-27 17:49:07,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:07,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:07,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:07,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:07,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-06-27 17:49:07,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 269 transitions, 3628 flow. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2024-06-27 17:49:07,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:07,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-06-27 17:49:07,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:08,175 INFO L124 PetriNetUnfolderBase]: 1311/3127 cut-off events. [2024-06-27 17:49:08,175 INFO L125 PetriNetUnfolderBase]: For 79662/80059 co-relation queries the response was YES. [2024-06-27 17:49:08,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18722 conditions, 3127 events. 1311/3127 cut-off events. For 79662/80059 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 22829 event pairs, 647 based on Foata normal form. 120/3114 useless extension candidates. Maximal degree in co-relation 15358. Up to 1663 conditions per place. [2024-06-27 17:49:08,203 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 103 selfloop transitions, 49 changer transitions 1/276 dead transitions. [2024-06-27 17:49:08,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 276 transitions, 3831 flow [2024-06-27 17:49:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-27 17:49:08,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-27 17:49:08,204 INFO L175 Difference]: Start difference. First operand has 215 places, 269 transitions, 3628 flow. Second operand 5 states and 263 transitions. [2024-06-27 17:49:08,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 276 transitions, 3831 flow [2024-06-27 17:49:08,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 276 transitions, 3577 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:08,400 INFO L231 Difference]: Finished difference. Result has 215 places, 256 transitions, 3314 flow [2024-06-27 17:49:08,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3314, PETRI_PLACES=215, PETRI_TRANSITIONS=256} [2024-06-27 17:49:08,401 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 149 predicate places. [2024-06-27 17:49:08,401 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 256 transitions, 3314 flow [2024-06-27 17:49:08,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2024-06-27 17:49:08,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:08,401 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] [2024-06-27 17:49:08,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:49:08,401 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:08,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:08,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1093701351, now seen corresponding path program 1 times [2024-06-27 17:49:08,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446990708] [2024-06-27 17:49:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:08,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:08,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:08,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446990708] [2024-06-27 17:49:08,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446990708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:08,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:08,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:08,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136884493] [2024-06-27 17:49:08,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:08,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:08,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:08,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:08,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:08,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 256 transitions, 3314 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:08,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:08,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:08,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:08,953 INFO L124 PetriNetUnfolderBase]: 1424/3419 cut-off events. [2024-06-27 17:49:08,953 INFO L125 PetriNetUnfolderBase]: For 144533/144758 co-relation queries the response was YES. [2024-06-27 17:49:08,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23154 conditions, 3419 events. 1424/3419 cut-off events. For 144533/144758 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 25139 event pairs, 378 based on Foata normal form. 69/3439 useless extension candidates. Maximal degree in co-relation 22671. Up to 1418 conditions per place. [2024-06-27 17:49:08,987 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 130 selfloop transitions, 25 changer transitions 2/276 dead transitions. [2024-06-27 17:49:08,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 276 transitions, 3866 flow [2024-06-27 17:49:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-06-27 17:49:08,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773333333333333 [2024-06-27 17:49:08,991 INFO L175 Difference]: Start difference. First operand has 215 places, 256 transitions, 3314 flow. Second operand 5 states and 254 transitions. [2024-06-27 17:49:08,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 276 transitions, 3866 flow [2024-06-27 17:49:09,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 276 transitions, 3778 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:09,207 INFO L231 Difference]: Finished difference. Result has 219 places, 258 transitions, 3327 flow [2024-06-27 17:49:09,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3327, PETRI_PLACES=219, PETRI_TRANSITIONS=258} [2024-06-27 17:49:09,207 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 153 predicate places. [2024-06-27 17:49:09,208 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 258 transitions, 3327 flow [2024-06-27 17:49:09,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-06-27 17:49:09,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:09,208 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] [2024-06-27 17:49:09,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:49:09,208 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:09,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 94153764, now seen corresponding path program 1 times [2024-06-27 17:49:09,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:09,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355201680] [2024-06-27 17:49:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355201680] [2024-06-27 17:49:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355201680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106877180] [2024-06-27 17:49:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:09,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:09,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 258 transitions, 3327 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:09,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:09,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:09,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:09,775 INFO L124 PetriNetUnfolderBase]: 1406/3355 cut-off events. [2024-06-27 17:49:09,775 INFO L125 PetriNetUnfolderBase]: For 141843/142070 co-relation queries the response was YES. [2024-06-27 17:49:09,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22593 conditions, 3355 events. 1406/3355 cut-off events. For 141843/142070 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24731 event pairs, 419 based on Foata normal form. 68/3327 useless extension candidates. Maximal degree in co-relation 18625. Up to 1087 conditions per place. [2024-06-27 17:49:09,811 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 128 selfloop transitions, 30 changer transitions 2/279 dead transitions. [2024-06-27 17:49:09,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3914 flow [2024-06-27 17:49:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 258 transitions. [2024-06-27 17:49:09,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.688 [2024-06-27 17:49:09,812 INFO L175 Difference]: Start difference. First operand has 219 places, 258 transitions, 3327 flow. Second operand 5 states and 258 transitions. [2024-06-27 17:49:09,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3914 flow [2024-06-27 17:49:10,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 279 transitions, 3773 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:10,087 INFO L231 Difference]: Finished difference. Result has 218 places, 259 transitions, 3278 flow [2024-06-27 17:49:10,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3278, PETRI_PLACES=218, PETRI_TRANSITIONS=259} [2024-06-27 17:49:10,087 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 152 predicate places. [2024-06-27 17:49:10,087 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 259 transitions, 3278 flow [2024-06-27 17:49:10,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:10,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:10,088 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] [2024-06-27 17:49:10,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:49:10,088 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:10,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1408417440, now seen corresponding path program 2 times [2024-06-27 17:49:10,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:10,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581246302] [2024-06-27 17:49:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:10,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:10,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:10,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581246302] [2024-06-27 17:49:10,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581246302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:10,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:10,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970069360] [2024-06-27 17:49:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:10,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:10,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:10,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 259 transitions, 3278 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:10,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:10,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:10,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:10,697 INFO L124 PetriNetUnfolderBase]: 1431/3413 cut-off events. [2024-06-27 17:49:10,697 INFO L125 PetriNetUnfolderBase]: For 139214/139453 co-relation queries the response was YES. [2024-06-27 17:49:10,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22778 conditions, 3413 events. 1431/3413 cut-off events. For 139214/139453 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 25023 event pairs, 248 based on Foata normal form. 59/3411 useless extension candidates. Maximal degree in co-relation 21609. Up to 923 conditions per place. [2024-06-27 17:49:10,731 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 132 selfloop transitions, 28 changer transitions 2/281 dead transitions. [2024-06-27 17:49:10,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 281 transitions, 3874 flow [2024-06-27 17:49:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-06-27 17:49:10,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6906666666666667 [2024-06-27 17:49:10,732 INFO L175 Difference]: Start difference. First operand has 218 places, 259 transitions, 3278 flow. Second operand 5 states and 259 transitions. [2024-06-27 17:49:10,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 281 transitions, 3874 flow [2024-06-27 17:49:10,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 281 transitions, 3795 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:10,997 INFO L231 Difference]: Finished difference. Result has 220 places, 259 transitions, 3267 flow [2024-06-27 17:49:10,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3267, PETRI_PLACES=220, PETRI_TRANSITIONS=259} [2024-06-27 17:49:10,998 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 154 predicate places. [2024-06-27 17:49:10,998 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 259 transitions, 3267 flow [2024-06-27 17:49:10,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:10,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:10,998 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] [2024-06-27 17:49:10,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:49:10,999 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:10,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:10,999 INFO L85 PathProgramCache]: Analyzing trace with hash -241737146, now seen corresponding path program 1 times [2024-06-27 17:49:10,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:10,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821099314] [2024-06-27 17:49:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:10,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:11,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:11,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821099314] [2024-06-27 17:49:11,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821099314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:11,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101233498] [2024-06-27 17:49:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:11,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:11,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:11,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:11,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 259 transitions, 3267 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:11,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:11,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:11,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:11,548 INFO L124 PetriNetUnfolderBase]: 1429/3385 cut-off events. [2024-06-27 17:49:11,549 INFO L125 PetriNetUnfolderBase]: For 137348/137571 co-relation queries the response was YES. [2024-06-27 17:49:11,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22451 conditions, 3385 events. 1429/3385 cut-off events. For 137348/137571 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 24614 event pairs, 462 based on Foata normal form. 65/3381 useless extension candidates. Maximal degree in co-relation 18415. Up to 1142 conditions per place. [2024-06-27 17:49:11,580 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 128 selfloop transitions, 31 changer transitions 1/279 dead transitions. [2024-06-27 17:49:11,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 279 transitions, 3908 flow [2024-06-27 17:49:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-06-27 17:49:11,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773333333333333 [2024-06-27 17:49:11,582 INFO L175 Difference]: Start difference. First operand has 220 places, 259 transitions, 3267 flow. Second operand 5 states and 254 transitions. [2024-06-27 17:49:11,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 279 transitions, 3908 flow [2024-06-27 17:49:11,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 279 transitions, 3786 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:11,814 INFO L231 Difference]: Finished difference. Result has 219 places, 264 transitions, 3324 flow [2024-06-27 17:49:11,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3324, PETRI_PLACES=219, PETRI_TRANSITIONS=264} [2024-06-27 17:49:11,814 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 153 predicate places. [2024-06-27 17:49:11,814 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 264 transitions, 3324 flow [2024-06-27 17:49:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:11,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:11,815 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] [2024-06-27 17:49:11,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:49:11,815 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:11,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1871600358, now seen corresponding path program 1 times [2024-06-27 17:49:11,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:11,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974853748] [2024-06-27 17:49:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:11,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:11,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974853748] [2024-06-27 17:49:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974853748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:11,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:11,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98516892] [2024-06-27 17:49:11,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:11,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:11,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:11,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:11,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2024-06-27 17:49:11,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 264 transitions, 3324 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-06-27 17:49:11,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:11,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2024-06-27 17:49:11,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:12,247 INFO L124 PetriNetUnfolderBase]: 1196/2819 cut-off events. [2024-06-27 17:49:12,247 INFO L125 PetriNetUnfolderBase]: For 55774/56037 co-relation queries the response was YES. [2024-06-27 17:49:12,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15858 conditions, 2819 events. 1196/2819 cut-off events. For 55774/56037 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 19834 event pairs, 645 based on Foata normal form. 69/2793 useless extension candidates. Maximal degree in co-relation 13638. Up to 1650 conditions per place. [2024-06-27 17:49:12,271 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 113 selfloop transitions, 28 changer transitions 1/250 dead transitions. [2024-06-27 17:49:12,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 250 transitions, 3357 flow [2024-06-27 17:49:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2024-06-27 17:49:12,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826666666666666 [2024-06-27 17:49:12,274 INFO L175 Difference]: Start difference. First operand has 219 places, 264 transitions, 3324 flow. Second operand 5 states and 256 transitions. [2024-06-27 17:49:12,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 250 transitions, 3357 flow [2024-06-27 17:49:12,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 250 transitions, 3182 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:12,458 INFO L231 Difference]: Finished difference. Result has 216 places, 233 transitions, 2828 flow [2024-06-27 17:49:12,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2828, PETRI_PLACES=216, PETRI_TRANSITIONS=233} [2024-06-27 17:49:12,459 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 150 predicate places. [2024-06-27 17:49:12,459 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 233 transitions, 2828 flow [2024-06-27 17:49:12,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-06-27 17:49:12,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:12,459 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] [2024-06-27 17:49:12,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:49:12,460 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:12,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:12,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1231873310, now seen corresponding path program 1 times [2024-06-27 17:49:12,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:12,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782105385] [2024-06-27 17:49:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:12,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:12,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:12,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782105385] [2024-06-27 17:49:12,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782105385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:12,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:12,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:12,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430284073] [2024-06-27 17:49:12,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:12,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:12,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:12,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 233 transitions, 2828 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:12,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:12,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:12,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:12,924 INFO L124 PetriNetUnfolderBase]: 1131/2787 cut-off events. [2024-06-27 17:49:12,928 INFO L125 PetriNetUnfolderBase]: For 93973/94115 co-relation queries the response was YES. [2024-06-27 17:49:12,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17022 conditions, 2787 events. 1131/2787 cut-off events. For 93973/94115 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 20027 event pairs, 347 based on Foata normal form. 39/2775 useless extension candidates. Maximal degree in co-relation 15552. Up to 835 conditions per place. [2024-06-27 17:49:12,957 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 114 selfloop transitions, 34 changer transitions 1/253 dead transitions. [2024-06-27 17:49:12,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 253 transitions, 3400 flow [2024-06-27 17:49:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-06-27 17:49:12,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6853333333333333 [2024-06-27 17:49:12,959 INFO L175 Difference]: Start difference. First operand has 216 places, 233 transitions, 2828 flow. Second operand 5 states and 257 transitions. [2024-06-27 17:49:12,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 253 transitions, 3400 flow [2024-06-27 17:49:13,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 253 transitions, 3305 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:13,132 INFO L231 Difference]: Finished difference. Result has 219 places, 236 transitions, 2866 flow [2024-06-27 17:49:13,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2866, PETRI_PLACES=219, PETRI_TRANSITIONS=236} [2024-06-27 17:49:13,132 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 153 predicate places. [2024-06-27 17:49:13,133 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 236 transitions, 2866 flow [2024-06-27 17:49:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:13,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:13,133 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] [2024-06-27 17:49:13,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:49:13,133 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:13,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash 200363948, now seen corresponding path program 2 times [2024-06-27 17:49:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363048976] [2024-06-27 17:49:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:13,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:13,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:13,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363048976] [2024-06-27 17:49:13,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363048976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:13,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:13,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:13,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836206708] [2024-06-27 17:49:13,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:13,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:13,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:13,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:13,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:13,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:13,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 236 transitions, 2866 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:13,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:13,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:13,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:13,576 INFO L124 PetriNetUnfolderBase]: 1106/2750 cut-off events. [2024-06-27 17:49:13,576 INFO L125 PetriNetUnfolderBase]: For 94213/94352 co-relation queries the response was YES. [2024-06-27 17:49:13,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16259 conditions, 2750 events. 1106/2750 cut-off events. For 94213/94352 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 19783 event pairs, 348 based on Foata normal form. 53/2751 useless extension candidates. Maximal degree in co-relation 14943. Up to 860 conditions per place. [2024-06-27 17:49:13,601 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 125 selfloop transitions, 26 changer transitions 1/256 dead transitions. [2024-06-27 17:49:13,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 256 transitions, 3461 flow [2024-06-27 17:49:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-06-27 17:49:13,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6906666666666667 [2024-06-27 17:49:13,602 INFO L175 Difference]: Start difference. First operand has 219 places, 236 transitions, 2866 flow. Second operand 5 states and 259 transitions. [2024-06-27 17:49:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 256 transitions, 3461 flow [2024-06-27 17:49:13,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 256 transitions, 3399 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:13,775 INFO L231 Difference]: Finished difference. Result has 223 places, 239 transitions, 2960 flow [2024-06-27 17:49:13,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2960, PETRI_PLACES=223, PETRI_TRANSITIONS=239} [2024-06-27 17:49:13,775 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 157 predicate places. [2024-06-27 17:49:13,776 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 239 transitions, 2960 flow [2024-06-27 17:49:13,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:13,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:13,776 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] [2024-06-27 17:49:13,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:49:13,776 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:13,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1591131256, now seen corresponding path program 1 times [2024-06-27 17:49:13,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:13,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130773431] [2024-06-27 17:49:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:13,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:13,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:13,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130773431] [2024-06-27 17:49:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130773431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:13,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219087679] [2024-06-27 17:49:13,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:13,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:13,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 239 transitions, 2960 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:13,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:13,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:13,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:14,245 INFO L124 PetriNetUnfolderBase]: 1111/2781 cut-off events. [2024-06-27 17:49:14,245 INFO L125 PetriNetUnfolderBase]: For 84816/84944 co-relation queries the response was YES. [2024-06-27 17:49:14,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16267 conditions, 2781 events. 1111/2781 cut-off events. For 84816/84944 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 20129 event pairs, 334 based on Foata normal form. 41/2775 useless extension candidates. Maximal degree in co-relation 14933. Up to 835 conditions per place. [2024-06-27 17:49:14,272 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 111 selfloop transitions, 35 changer transitions 9/255 dead transitions. [2024-06-27 17:49:14,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 255 transitions, 3471 flow [2024-06-27 17:49:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2024-06-27 17:49:14,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 17:49:14,273 INFO L175 Difference]: Start difference. First operand has 223 places, 239 transitions, 2960 flow. Second operand 5 states and 255 transitions. [2024-06-27 17:49:14,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 255 transitions, 3471 flow [2024-06-27 17:49:14,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 255 transitions, 3389 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:14,485 INFO L231 Difference]: Finished difference. Result has 225 places, 231 transitions, 2847 flow [2024-06-27 17:49:14,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2847, PETRI_PLACES=225, PETRI_TRANSITIONS=231} [2024-06-27 17:49:14,486 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 159 predicate places. [2024-06-27 17:49:14,486 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 231 transitions, 2847 flow [2024-06-27 17:49:14,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:14,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:14,487 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] [2024-06-27 17:49:14,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:49:14,487 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:14,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash 94422668, now seen corresponding path program 2 times [2024-06-27 17:49:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93357094] [2024-06-27 17:49:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:14,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:14,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93357094] [2024-06-27 17:49:14,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93357094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:14,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:14,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:14,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690980734] [2024-06-27 17:49:14,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:14,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:14,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:14,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:14,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 231 transitions, 2847 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:14,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:14,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:14,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:14,921 INFO L124 PetriNetUnfolderBase]: 1085/2746 cut-off events. [2024-06-27 17:49:14,921 INFO L125 PetriNetUnfolderBase]: For 81333/81453 co-relation queries the response was YES. [2024-06-27 17:49:14,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15836 conditions, 2746 events. 1085/2746 cut-off events. For 81333/81453 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 19921 event pairs, 347 based on Foata normal form. 36/2737 useless extension candidates. Maximal degree in co-relation 14579. Up to 868 conditions per place. [2024-06-27 17:49:14,944 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 104 selfloop transitions, 18 changer transitions 35/244 dead transitions. [2024-06-27 17:49:14,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 244 transitions, 3327 flow [2024-06-27 17:49:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 252 transitions. [2024-06-27 17:49:14,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.672 [2024-06-27 17:49:14,945 INFO L175 Difference]: Start difference. First operand has 225 places, 231 transitions, 2847 flow. Second operand 5 states and 252 transitions. [2024-06-27 17:49:14,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 244 transitions, 3327 flow [2024-06-27 17:49:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 244 transitions, 3181 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:15,147 INFO L231 Difference]: Finished difference. Result has 224 places, 198 transitions, 2331 flow [2024-06-27 17:49:15,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2331, PETRI_PLACES=224, PETRI_TRANSITIONS=198} [2024-06-27 17:49:15,148 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 158 predicate places. [2024-06-27 17:49:15,148 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 198 transitions, 2331 flow [2024-06-27 17:49:15,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:15,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:15,148 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] [2024-06-27 17:49:15,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:49:15,148 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:15,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1545084690, now seen corresponding path program 2 times [2024-06-27 17:49:15,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:15,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345289808] [2024-06-27 17:49:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:15,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:15,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345289808] [2024-06-27 17:49:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345289808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:15,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757301572] [2024-06-27 17:49:15,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:15,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2024-06-27 17:49:15,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 198 transitions, 2331 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-06-27 17:49:15,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:15,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2024-06-27 17:49:15,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:15,425 INFO L124 PetriNetUnfolderBase]: 733/1847 cut-off events. [2024-06-27 17:49:15,425 INFO L125 PetriNetUnfolderBase]: For 29645/29750 co-relation queries the response was YES. [2024-06-27 17:49:15,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9383 conditions, 1847 events. 733/1847 cut-off events. For 29645/29750 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12497 event pairs, 439 based on Foata normal form. 45/1836 useless extension candidates. Maximal degree in co-relation 9020. Up to 1073 conditions per place. [2024-06-27 17:49:15,439 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 62 selfloop transitions, 0 changer transitions 50/174 dead transitions. [2024-06-27 17:49:15,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 174 transitions, 2212 flow [2024-06-27 17:49:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-27 17:49:15,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648 [2024-06-27 17:49:15,439 INFO L175 Difference]: Start difference. First operand has 224 places, 198 transitions, 2331 flow. Second operand 5 states and 243 transitions. [2024-06-27 17:49:15,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 174 transitions, 2212 flow [2024-06-27 17:49:15,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 174 transitions, 1928 flow, removed 29 selfloop flow, removed 23 redundant places. [2024-06-27 17:49:15,538 INFO L231 Difference]: Finished difference. Result has 201 places, 124 transitions, 1251 flow [2024-06-27 17:49:15,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1251, PETRI_PLACES=201, PETRI_TRANSITIONS=124} [2024-06-27 17:49:15,539 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 135 predicate places. [2024-06-27 17:49:15,539 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 124 transitions, 1251 flow [2024-06-27 17:49:15,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-06-27 17:49:15,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:15,539 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] [2024-06-27 17:49:15,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:49:15,539 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:15,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:15,540 INFO L85 PathProgramCache]: Analyzing trace with hash 830788142, now seen corresponding path program 2 times [2024-06-27 17:49:15,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:15,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105355227] [2024-06-27 17:49:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:15,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:15,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:15,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105355227] [2024-06-27 17:49:15,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105355227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:15,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:15,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188478511] [2024-06-27 17:49:15,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:15,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:15,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:15,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 124 transitions, 1251 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:15,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:15,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:15,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:15,792 INFO L124 PetriNetUnfolderBase]: 467/1283 cut-off events. [2024-06-27 17:49:15,792 INFO L125 PetriNetUnfolderBase]: For 30537/30605 co-relation queries the response was YES. [2024-06-27 17:49:15,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6414 conditions, 1283 events. 467/1283 cut-off events. For 30537/30605 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7980 event pairs, 198 based on Foata normal form. 34/1303 useless extension candidates. Maximal degree in co-relation 6345. Up to 458 conditions per place. [2024-06-27 17:49:15,800 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 58 selfloop transitions, 10 changer transitions 34/135 dead transitions. [2024-06-27 17:49:15,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 135 transitions, 1587 flow [2024-06-27 17:49:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-27 17:49:15,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-27 17:49:15,801 INFO L175 Difference]: Start difference. First operand has 201 places, 124 transitions, 1251 flow. Second operand 5 states and 245 transitions. [2024-06-27 17:49:15,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 135 transitions, 1587 flow [2024-06-27 17:49:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 135 transitions, 1449 flow, removed 45 selfloop flow, removed 16 redundant places. [2024-06-27 17:49:15,846 INFO L231 Difference]: Finished difference. Result has 175 places, 93 transitions, 899 flow [2024-06-27 17:49:15,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=899, PETRI_PLACES=175, PETRI_TRANSITIONS=93} [2024-06-27 17:49:15,847 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 109 predicate places. [2024-06-27 17:49:15,847 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 93 transitions, 899 flow [2024-06-27 17:49:15,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:15,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:15,847 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] [2024-06-27 17:49:15,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:49:15,848 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:15,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1915978206, now seen corresponding path program 1 times [2024-06-27 17:49:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:15,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671890892] [2024-06-27 17:49:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:15,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:15,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671890892] [2024-06-27 17:49:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671890892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:15,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:15,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:15,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868331877] [2024-06-27 17:49:15,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:15,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:15,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:15,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:15,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 93 transitions, 899 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:15,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:15,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:15,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,038 INFO L124 PetriNetUnfolderBase]: 389/1020 cut-off events. [2024-06-27 17:49:16,039 INFO L125 PetriNetUnfolderBase]: For 20807/20868 co-relation queries the response was YES. [2024-06-27 17:49:16,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4809 conditions, 1020 events. 389/1020 cut-off events. For 20807/20868 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5931 event pairs, 249 based on Foata normal form. 33/1032 useless extension candidates. Maximal degree in co-relation 4751. Up to 586 conditions per place. [2024-06-27 17:49:16,044 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 58 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-27 17:49:16,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 106 transitions, 1143 flow [2024-06-27 17:49:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-27 17:49:16,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648 [2024-06-27 17:49:16,045 INFO L175 Difference]: Start difference. First operand has 175 places, 93 transitions, 899 flow. Second operand 5 states and 243 transitions. [2024-06-27 17:49:16,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 106 transitions, 1143 flow [2024-06-27 17:49:16,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 106 transitions, 1013 flow, removed 31 selfloop flow, removed 17 redundant places. [2024-06-27 17:49:16,067 INFO L231 Difference]: Finished difference. Result has 147 places, 94 transitions, 832 flow [2024-06-27 17:49:16,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=832, PETRI_PLACES=147, PETRI_TRANSITIONS=94} [2024-06-27 17:49:16,067 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 81 predicate places. [2024-06-27 17:49:16,067 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 94 transitions, 832 flow [2024-06-27 17:49:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:16,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,068 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] [2024-06-27 17:49:16,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:49:16,068 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:16,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1219841048, now seen corresponding path program 2 times [2024-06-27 17:49:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214954866] [2024-06-27 17:49:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214954866] [2024-06-27 17:49:16,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214954866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:16,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443872543] [2024-06-27 17:49:16,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:16,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:16,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:16,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 94 transitions, 832 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:16,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:16,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,245 INFO L124 PetriNetUnfolderBase]: 397/1048 cut-off events. [2024-06-27 17:49:16,245 INFO L125 PetriNetUnfolderBase]: For 12549/12611 co-relation queries the response was YES. [2024-06-27 17:49:16,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4184 conditions, 1048 events. 397/1048 cut-off events. For 12549/12611 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6034 event pairs, 179 based on Foata normal form. 36/1073 useless extension candidates. Maximal degree in co-relation 4135. Up to 450 conditions per place. [2024-06-27 17:49:16,251 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 63 selfloop transitions, 12 changer transitions 1/109 dead transitions. [2024-06-27 17:49:16,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 109 transitions, 1127 flow [2024-06-27 17:49:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2024-06-27 17:49:16,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586666666666666 [2024-06-27 17:49:16,256 INFO L175 Difference]: Start difference. First operand has 147 places, 94 transitions, 832 flow. Second operand 5 states and 247 transitions. [2024-06-27 17:49:16,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 109 transitions, 1127 flow [2024-06-27 17:49:16,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 109 transitions, 1098 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:16,278 INFO L231 Difference]: Finished difference. Result has 148 places, 95 transitions, 843 flow [2024-06-27 17:49:16,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=148, PETRI_TRANSITIONS=95} [2024-06-27 17:49:16,278 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 82 predicate places. [2024-06-27 17:49:16,278 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 95 transitions, 843 flow [2024-06-27 17:49:16,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:16,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,279 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] [2024-06-27 17:49:16,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:49:16,279 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:16,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1219901498, now seen corresponding path program 3 times [2024-06-27 17:49:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243781980] [2024-06-27 17:49:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243781980] [2024-06-27 17:49:16,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243781980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:16,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88078986] [2024-06-27 17:49:16,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:16,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:16,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:16,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 95 transitions, 843 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:16,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:16,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,498 INFO L124 PetriNetUnfolderBase]: 389/1038 cut-off events. [2024-06-27 17:49:16,498 INFO L125 PetriNetUnfolderBase]: For 10773/10839 co-relation queries the response was YES. [2024-06-27 17:49:16,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 1038 events. 389/1038 cut-off events. For 10773/10839 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5987 event pairs, 181 based on Foata normal form. 30/1058 useless extension candidates. Maximal degree in co-relation 4059. Up to 450 conditions per place. [2024-06-27 17:49:16,503 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 57 selfloop transitions, 15 changer transitions 2/107 dead transitions. [2024-06-27 17:49:16,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 107 transitions, 1075 flow [2024-06-27 17:49:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-27 17:49:16,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506666666666666 [2024-06-27 17:49:16,507 INFO L175 Difference]: Start difference. First operand has 148 places, 95 transitions, 843 flow. Second operand 5 states and 244 transitions. [2024-06-27 17:49:16,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 107 transitions, 1075 flow [2024-06-27 17:49:16,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 107 transitions, 1043 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:16,527 INFO L231 Difference]: Finished difference. Result has 150 places, 95 transitions, 845 flow [2024-06-27 17:49:16,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=845, PETRI_PLACES=150, PETRI_TRANSITIONS=95} [2024-06-27 17:49:16,527 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 84 predicate places. [2024-06-27 17:49:16,527 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 95 transitions, 845 flow [2024-06-27 17:49:16,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2024-06-27 17:49:16,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,527 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] [2024-06-27 17:49:16,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:49:16,528 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:16,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash 401807442, now seen corresponding path program 1 times [2024-06-27 17:49:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63284908] [2024-06-27 17:49:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63284908] [2024-06-27 17:49:16,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63284908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:16,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828544296] [2024-06-27 17:49:16,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:16,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:16,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:16,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 95 transitions, 845 flow. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,723 INFO L124 PetriNetUnfolderBase]: 374/1023 cut-off events. [2024-06-27 17:49:16,723 INFO L125 PetriNetUnfolderBase]: For 9579/9638 co-relation queries the response was YES. [2024-06-27 17:49:16,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3905 conditions, 1023 events. 374/1023 cut-off events. For 9579/9638 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5973 event pairs, 95 based on Foata normal form. 34/1049 useless extension candidates. Maximal degree in co-relation 3857. Up to 340 conditions per place. [2024-06-27 17:49:16,728 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 53 selfloop transitions, 22 changer transitions 2/110 dead transitions. [2024-06-27 17:49:16,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 110 transitions, 1129 flow [2024-06-27 17:49:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2024-06-27 17:49:16,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.664 [2024-06-27 17:49:16,729 INFO L175 Difference]: Start difference. First operand has 150 places, 95 transitions, 845 flow. Second operand 5 states and 249 transitions. [2024-06-27 17:49:16,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 110 transitions, 1129 flow [2024-06-27 17:49:16,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 110 transitions, 1098 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:16,749 INFO L231 Difference]: Finished difference. Result has 151 places, 95 transitions, 867 flow [2024-06-27 17:49:16,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=867, PETRI_PLACES=151, PETRI_TRANSITIONS=95} [2024-06-27 17:49:16,750 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 85 predicate places. [2024-06-27 17:49:16,750 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 95 transitions, 867 flow [2024-06-27 17:49:16,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,750 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] [2024-06-27 17:49:16,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:49:16,750 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:16,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1849005290, now seen corresponding path program 1 times [2024-06-27 17:49:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251475694] [2024-06-27 17:49:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251475694] [2024-06-27 17:49:16,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251475694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927725439] [2024-06-27 17:49:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:16,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:16,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 95 transitions, 867 flow. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:16,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,922 INFO L124 PetriNetUnfolderBase]: 377/1016 cut-off events. [2024-06-27 17:49:16,922 INFO L125 PetriNetUnfolderBase]: For 10221/10263 co-relation queries the response was YES. [2024-06-27 17:49:16,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3955 conditions, 1016 events. 377/1016 cut-off events. For 10221/10263 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5818 event pairs, 169 based on Foata normal form. 30/1044 useless extension candidates. Maximal degree in co-relation 3906. Up to 440 conditions per place. [2024-06-27 17:49:16,929 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 53 selfloop transitions, 18 changer transitions 2/106 dead transitions. [2024-06-27 17:49:16,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 106 transitions, 1091 flow [2024-06-27 17:49:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2024-06-27 17:49:16,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453333333333333 [2024-06-27 17:49:16,930 INFO L175 Difference]: Start difference. First operand has 151 places, 95 transitions, 867 flow. Second operand 5 states and 242 transitions. [2024-06-27 17:49:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 106 transitions, 1091 flow [2024-06-27 17:49:16,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 106 transitions, 1043 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:16,954 INFO L231 Difference]: Finished difference. Result has 152 places, 95 transitions, 864 flow [2024-06-27 17:49:16,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=864, PETRI_PLACES=152, PETRI_TRANSITIONS=95} [2024-06-27 17:49:16,954 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 86 predicate places. [2024-06-27 17:49:16,954 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 95 transitions, 864 flow [2024-06-27 17:49:16,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,954 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, 1, 1, 1] [2024-06-27 17:49:16,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:49:16,955 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:16,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2079875995, now seen corresponding path program 1 times [2024-06-27 17:49:16,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826320413] [2024-06-27 17:49:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826320413] [2024-06-27 17:49:16,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826320413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:16,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546641196] [2024-06-27 17:49:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:16,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:17,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:17,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 95 transitions, 864 flow. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 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) [2024-06-27 17:49:17,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:17,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:17,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:17,126 INFO L124 PetriNetUnfolderBase]: 356/973 cut-off events. [2024-06-27 17:49:17,126 INFO L125 PetriNetUnfolderBase]: For 7983/8026 co-relation queries the response was YES. [2024-06-27 17:49:17,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3617 conditions, 973 events. 356/973 cut-off events. For 7983/8026 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5573 event pairs, 87 based on Foata normal form. 34/1003 useless extension candidates. Maximal degree in co-relation 3567. Up to 300 conditions per place. [2024-06-27 17:49:17,131 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 37 selfloop transitions, 10 changer transitions 38/109 dead transitions. [2024-06-27 17:49:17,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 109 transitions, 1102 flow [2024-06-27 17:49:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2024-06-27 17:49:17,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6613333333333333 [2024-06-27 17:49:17,133 INFO L175 Difference]: Start difference. First operand has 152 places, 95 transitions, 864 flow. Second operand 5 states and 248 transitions. [2024-06-27 17:49:17,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 109 transitions, 1102 flow [2024-06-27 17:49:17,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 109 transitions, 1065 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:17,150 INFO L231 Difference]: Finished difference. Result has 154 places, 65 transitions, 561 flow [2024-06-27 17:49:17,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=561, PETRI_PLACES=154, PETRI_TRANSITIONS=65} [2024-06-27 17:49:17,151 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 88 predicate places. [2024-06-27 17:49:17,151 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 65 transitions, 561 flow [2024-06-27 17:49:17,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 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) [2024-06-27 17:49:17,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:17,151 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, 1, 1, 1] [2024-06-27 17:49:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:49:17,151 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:17,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1907193507, now seen corresponding path program 1 times [2024-06-27 17:49:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:17,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259784115] [2024-06-27 17:49:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:17,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259784115] [2024-06-27 17:49:17,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259784115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:17,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:17,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:17,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120743309] [2024-06-27 17:49:17,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:17,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:17,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:17,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:17,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 65 transitions, 561 flow. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 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) [2024-06-27 17:49:17,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:17,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:17,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:17,307 INFO L124 PetriNetUnfolderBase]: 173/460 cut-off events. [2024-06-27 17:49:17,307 INFO L125 PetriNetUnfolderBase]: For 6349/6371 co-relation queries the response was YES. [2024-06-27 17:49:17,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 460 events. 173/460 cut-off events. For 6349/6371 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1960 event pairs, 54 based on Foata normal form. 18/465 useless extension candidates. Maximal degree in co-relation 1882. Up to 155 conditions per place. [2024-06-27 17:49:17,310 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 34 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-27 17:49:17,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 70 transitions, 663 flow [2024-06-27 17:49:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-06-27 17:49:17,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186666666666667 [2024-06-27 17:49:17,310 INFO L175 Difference]: Start difference. First operand has 154 places, 65 transitions, 561 flow. Second operand 5 states and 232 transitions. [2024-06-27 17:49:17,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 70 transitions, 663 flow [2024-06-27 17:49:17,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 70 transitions, 490 flow, removed 19 selfloop flow, removed 44 redundant places. [2024-06-27 17:49:17,320 INFO L231 Difference]: Finished difference. Result has 100 places, 65 transitions, 416 flow [2024-06-27 17:49:17,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=416, PETRI_PLACES=100, PETRI_TRANSITIONS=65} [2024-06-27 17:49:17,321 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2024-06-27 17:49:17,321 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 65 transitions, 416 flow [2024-06-27 17:49:17,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 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) [2024-06-27 17:49:17,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:17,321 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, 1, 1, 1, 1, 1] [2024-06-27 17:49:17,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:49:17,321 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 17:49:17,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:17,322 INFO L85 PathProgramCache]: Analyzing trace with hash -272269859, now seen corresponding path program 1 times [2024-06-27 17:49:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:17,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135369441] [2024-06-27 17:49:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:17,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:17,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:17,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135369441] [2024-06-27 17:49:17,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135369441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:17,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:17,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021002373] [2024-06-27 17:49:17,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:17,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:17,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-27 17:49:17,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 65 transitions, 416 flow. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 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) [2024-06-27 17:49:17,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:17,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-27 17:49:17,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:17,439 INFO L124 PetriNetUnfolderBase]: 151/429 cut-off events. [2024-06-27 17:49:17,439 INFO L125 PetriNetUnfolderBase]: For 2149/2175 co-relation queries the response was YES. [2024-06-27 17:49:17,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 429 events. 151/429 cut-off events. For 2149/2175 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1892 event pairs, 64 based on Foata normal form. 30/453 useless extension candidates. Maximal degree in co-relation 1254. Up to 154 conditions per place. [2024-06-27 17:49:17,441 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 0 selfloop transitions, 0 changer transitions 69/69 dead transitions. [2024-06-27 17:49:17,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 69 transitions, 480 flow [2024-06-27 17:49:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-06-27 17:49:17,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-27 17:49:17,442 INFO L175 Difference]: Start difference. First operand has 100 places, 65 transitions, 416 flow. Second operand 5 states and 230 transitions. [2024-06-27 17:49:17,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 69 transitions, 480 flow [2024-06-27 17:49:17,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 69 transitions, 404 flow, removed 0 selfloop flow, removed 21 redundant places. [2024-06-27 17:49:17,444 INFO L231 Difference]: Finished difference. Result has 82 places, 0 transitions, 0 flow [2024-06-27 17:49:17,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=82, PETRI_TRANSITIONS=0} [2024-06-27 17:49:17,445 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2024-06-27 17:49:17,445 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 0 transitions, 0 flow [2024-06-27 17:49:17,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 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) [2024-06-27 17:49:17,449 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2024-06-27 17:49:17,449 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-06-27 17:49:17,452 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 8 remaining) [2024-06-27 17:49:17,452 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 8 remaining) [2024-06-27 17:49:17,452 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2024-06-27 17:49:17,453 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2024-06-27 17:49:17,453 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-06-27 17:49:17,453 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-06-27 17:49:17,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:49:17,453 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:17,457 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 17:49:17,458 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 17:49:17,460 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 17:49:17,460 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 17:49:17,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 05:49:17 BasicIcfg [2024-06-27 17:49:17,461 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 17:49:17,464 INFO L158 Benchmark]: Toolchain (without parser) took 41958.29ms. Allocated memory was 134.2MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 58.1MB in the beginning and 2.9GB in the end (delta: -2.9GB). Peak memory consumption was 514.5MB. Max. memory is 16.1GB. [2024-06-27 17:49:17,464 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 94.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:49:17,465 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory was 104.7MB in the beginning and 104.5MB in the end (delta: 181.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:49:17,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 447.66ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 57.9MB in the beginning and 113.1MB in the end (delta: -55.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-06-27 17:49:17,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.01ms. Allocated memory is still 161.5MB. Free memory was 113.1MB in the beginning and 111.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:49:17,465 INFO L158 Benchmark]: Boogie Preprocessor took 35.66ms. Allocated memory is still 161.5MB. Free memory was 111.1MB in the beginning and 109.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:49:17,465 INFO L158 Benchmark]: RCFGBuilder took 394.50ms. Allocated memory is still 161.5MB. Free memory was 109.0MB in the beginning and 88.8MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-27 17:49:17,465 INFO L158 Benchmark]: TraceAbstraction took 41040.49ms. Allocated memory was 161.5MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 88.0MB in the beginning and 2.9GB in the end (delta: -2.8GB). Peak memory consumption was 514.5MB. Max. memory is 16.1GB. [2024-06-27 17:49:17,467 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 94.5MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory was 104.7MB in the beginning and 104.5MB in the end (delta: 181.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 447.66ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 57.9MB in the beginning and 113.1MB in the end (delta: -55.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.01ms. Allocated memory is still 161.5MB. Free memory was 113.1MB in the beginning and 111.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.66ms. Allocated memory is still 161.5MB. Free memory was 111.1MB in the beginning and 109.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 394.50ms. Allocated memory is still 161.5MB. Free memory was 109.0MB in the beginning and 88.8MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 41040.49ms. Allocated memory was 161.5MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 88.0MB in the beginning and 2.9GB in the end (delta: -2.8GB). Peak memory consumption was 514.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 802]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 745]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 819]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 820]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 116 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 40.9s, OverallIterations: 59, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 38.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7343 SdHoareTripleChecker+Valid, 4.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4683 mSDsluCounter, 2669 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1873 mSDsCounter, 450 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9277 IncrementalHoareTripleChecker+Invalid, 9727 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 450 mSolverCounterUnsat, 796 mSDtfsCounter, 9277 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3728occurred in iteration=38, InterpolantAutomatonStates: 287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 1154 NumberOfCodeBlocks, 1154 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 1095 ConstructedInterpolants, 0 QuantifiedInterpolants, 3694 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 59 InterpolantComputations, 59 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 17:49:17,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE