./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_tso.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-wmm/safe012_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_tso.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 21:50:13,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:50:13,273 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:50:13,281 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:50:13,282 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:50:13,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:50:13,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:50:13,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:50:13,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:50:13,333 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:50:13,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:50:13,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:50:13,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:50:13,336 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:50:13,337 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:50:13,337 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:50:13,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:50:13,338 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:50:13,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:50:13,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:50:13,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:50:13,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:50:13,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:50:13,339 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:50:13,340 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:50:13,340 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:50:13,340 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:50:13,341 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:50:13,341 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:50:13,342 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:50:13,343 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:50:13,343 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:50:13,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:50:13,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:50:13,344 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:50:13,344 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:50:13,344 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:50:13,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:50:13,345 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:50:13,345 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:50:13,345 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:50:13,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:50:13,346 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:50:13,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:50:13,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:50:13,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:50:13,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:50:13,629 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:50:13,629 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:50:13,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-27 21:50:14,821 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:50:15,086 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:50:15,087 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-27 21:50:15,107 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3b5740c/9caa6fa2ea5642599c7bbfbc5bb48444/FLAGcbedd4968 [2024-06-27 21:50:15,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3b5740c/9caa6fa2ea5642599c7bbfbc5bb48444 [2024-06-27 21:50:15,125 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:50:15,125 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:50:15,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_tso.yml/witness.yml [2024-06-27 21:50:15,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:50:15,214 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:50:15,215 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:50:15,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:50:15,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:50:15,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:50:15" (1/2) ... [2024-06-27 21:50:15,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516f899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:50:15, skipping insertion in model container [2024-06-27 21:50:15,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:50:15" (1/2) ... [2024-06-27 21:50:15,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@234b6100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:50:15, skipping insertion in model container [2024-06-27 21:50:15,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:50:15" (2/2) ... [2024-06-27 21:50:15,225 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516f899 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15, skipping insertion in model container [2024-06-27 21:50:15,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:50:15" (2/2) ... [2024-06-27 21:50:15,227 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:50:15,256 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:50:15,257 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) [2024-06-27 21:50:15,257 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) [2024-06-27 21:50:15,258 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) [2024-06-27 21:50:15,258 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:50:15,258 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 21:50:15,305 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:50:15,493 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-wmm/safe012_tso.i[945,958] [2024-06-27 21:50:15,645 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:50:15,655 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 21:50:15,696 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-wmm/safe012_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:50:15,743 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:50:15,775 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:50:15,775 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15 WrapperNode [2024-06-27 21:50:15,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:50:15,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:50:15,777 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:50:15,777 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:50:15,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,816 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,844 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-06-27 21:50:15,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:50:15,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:50:15,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:50:15,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:50:15,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,863 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,888 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 21:50:15,888 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,901 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:50:15,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:50:15,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:50:15,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:50:15,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (1/1) ... [2024-06-27 21:50:15,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:50:15,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:50:15,958 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 21:50:15,980 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 21:50:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:50:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:50:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:50:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:50:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:50:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:50:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:50:16,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:50:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:50:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:50:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:50:16,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:50:16,007 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 21:50:16,133 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:50:16,135 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:50:16,335 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:50:16,335 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:50:16,404 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:50:16,404 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:50:16,404 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:50:16 BoogieIcfgContainer [2024-06-27 21:50:16,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:50:16,406 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:50:16,407 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:50:16,410 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:50:16,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:50:15" (1/4) ... [2024-06-27 21:50:16,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1125f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:50:16, skipping insertion in model container [2024-06-27 21:50:16,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:50:15" (2/4) ... [2024-06-27 21:50:16,411 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1125f00 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:50:16, skipping insertion in model container [2024-06-27 21:50:16,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:50:15" (3/4) ... [2024-06-27 21:50:16,411 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1125f00 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:50:16, skipping insertion in model container [2024-06-27 21:50:16,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:50:16" (4/4) ... [2024-06-27 21:50:16,413 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_tso.i [2024-06-27 21:50:16,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:50:16,430 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:50:16,430 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:50:16,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:50:16,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 21:50:16,518 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-27 21:50:16,519 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:50:16,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-27 21:50:16,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 21:50:16,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-27 21:50:16,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:50:16,540 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;@48c7d52a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:50:16,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 21:50:16,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:50:16,544 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:50:16,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:50:16,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:16,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:50:16,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:16,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash 209495808, now seen corresponding path program 1 times [2024-06-27 21:50:16,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:16,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48486446] [2024-06-27 21:50:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:16,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:16,914 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 21:50:16,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:16,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48486446] [2024-06-27 21:50:16,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48486446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:16,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:16,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:50:16,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502372507] [2024-06-27 21:50:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:16,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:50:16,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:50:16,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:50:17,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 45 [2024-06-27 21:50:17,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 21:50:17,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:17,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 45 [2024-06-27 21:50:17,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:17,184 INFO L124 PetriNetUnfolderBase]: 242/501 cut-off events. [2024-06-27 21:50:17,184 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 21:50:17,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 501 events. 242/501 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2776 event pairs, 167 based on Foata normal form. 2/477 useless extension candidates. Maximal degree in co-relation 913. Up to 368 conditions per place. [2024-06-27 21:50:17,195 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 25 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-06-27 21:50:17,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 162 flow [2024-06-27 21:50:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:50:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:50:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-27 21:50:17,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-06-27 21:50:17,211 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 100 transitions. [2024-06-27 21:50:17,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 162 flow [2024-06-27 21:50:17,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:17,223 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 103 flow [2024-06-27 21:50:17,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-27 21:50:17,229 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2024-06-27 21:50:17,229 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 103 flow [2024-06-27 21:50:17,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 21:50:17,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:17,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:17,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:50:17,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:17,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1748125855, now seen corresponding path program 1 times [2024-06-27 21:50:17,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:17,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518565582] [2024-06-27 21:50:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:17,410 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 21:50:17,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518565582] [2024-06-27 21:50:17,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518565582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:17,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:17,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:50:17,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847818315] [2024-06-27 21:50:17,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:17,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:50:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:50:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:50:17,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 45 [2024-06-27 21:50:17,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 21:50:17,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:17,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 45 [2024-06-27 21:50:17,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:17,646 INFO L124 PetriNetUnfolderBase]: 396/800 cut-off events. [2024-06-27 21:50:17,646 INFO L125 PetriNetUnfolderBase]: For 94/97 co-relation queries the response was YES. [2024-06-27 21:50:17,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 800 events. 396/800 cut-off events. For 94/97 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4590 event pairs, 147 based on Foata normal form. 4/777 useless extension candidates. Maximal degree in co-relation 1631. Up to 603 conditions per place. [2024-06-27 21:50:17,654 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 36 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-06-27 21:50:17,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 245 flow [2024-06-27 21:50:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 21:50:17,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7277777777777777 [2024-06-27 21:50:17,662 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 103 flow. Second operand 4 states and 131 transitions. [2024-06-27 21:50:17,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 245 flow [2024-06-27 21:50:17,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:50:17,666 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 154 flow [2024-06-27 21:50:17,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 21:50:17,667 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2024-06-27 21:50:17,667 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 154 flow [2024-06-27 21:50:17,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 21:50:17,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:17,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:17,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:50:17,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:17,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1621223139, now seen corresponding path program 1 times [2024-06-27 21:50:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:17,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904761850] [2024-06-27 21:50:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:17,803 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 21:50:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:17,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904761850] [2024-06-27 21:50:17,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904761850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:17,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:17,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:50:17,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387130557] [2024-06-27 21:50:17,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:17,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:50:17,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:50:17,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:50:17,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:17,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 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 21:50:17,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:17,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:17,979 INFO L124 PetriNetUnfolderBase]: 510/977 cut-off events. [2024-06-27 21:50:17,979 INFO L125 PetriNetUnfolderBase]: For 362/362 co-relation queries the response was YES. [2024-06-27 21:50:17,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 977 events. 510/977 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5712 event pairs, 188 based on Foata normal form. 4/954 useless extension candidates. Maximal degree in co-relation 2303. Up to 743 conditions per place. [2024-06-27 21:50:17,989 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 50 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 21:50:17,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 357 flow [2024-06-27 21:50:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 21:50:17,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7022222222222222 [2024-06-27 21:50:17,995 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 154 flow. Second operand 5 states and 158 transitions. [2024-06-27 21:50:17,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 357 flow [2024-06-27 21:50:17,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 355 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:50:18,000 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 230 flow [2024-06-27 21:50:18,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 21:50:18,002 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-06-27 21:50:18,002 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 230 flow [2024-06-27 21:50:18,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 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 21:50:18,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:18,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:50:18,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:18,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1762064786, now seen corresponding path program 1 times [2024-06-27 21:50:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:18,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822162048] [2024-06-27 21:50:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:18,256 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 21:50:18,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:18,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822162048] [2024-06-27 21:50:18,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822162048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:18,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:18,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292710958] [2024-06-27 21:50:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:18,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:18,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 21:50:18,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:18,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:18,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:18,495 INFO L124 PetriNetUnfolderBase]: 684/1402 cut-off events. [2024-06-27 21:50:18,495 INFO L125 PetriNetUnfolderBase]: For 1184/1204 co-relation queries the response was YES. [2024-06-27 21:50:18,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3541 conditions, 1402 events. 684/1402 cut-off events. For 1184/1204 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8763 event pairs, 146 based on Foata normal form. 11/1385 useless extension candidates. Maximal degree in co-relation 3521. Up to 872 conditions per place. [2024-06-27 21:50:18,507 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 39 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-27 21:50:18,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 380 flow [2024-06-27 21:50:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-27 21:50:18,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-06-27 21:50:18,509 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 230 flow. Second operand 4 states and 129 transitions. [2024-06-27 21:50:18,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 380 flow [2024-06-27 21:50:18,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 378 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:50:18,516 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 282 flow [2024-06-27 21:50:18,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-06-27 21:50:18,517 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2024-06-27 21:50:18,517 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 282 flow [2024-06-27 21:50:18,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 21:50:18,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:18,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:18,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:50:18,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:18,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash -694329884, now seen corresponding path program 2 times [2024-06-27 21:50:18,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:18,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57370909] [2024-06-27 21:50:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:18,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:18,650 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 21:50:18,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:18,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57370909] [2024-06-27 21:50:18,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57370909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:18,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:18,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:18,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647462123] [2024-06-27 21:50:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:18,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:18,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:18,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:18,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:18,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 21:50:18,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:18,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:18,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:18,874 INFO L124 PetriNetUnfolderBase]: 673/1382 cut-off events. [2024-06-27 21:50:18,874 INFO L125 PetriNetUnfolderBase]: For 2098/2120 co-relation queries the response was YES. [2024-06-27 21:50:18,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 1382 events. 673/1382 cut-off events. For 2098/2120 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8631 event pairs, 143 based on Foata normal form. 13/1371 useless extension candidates. Maximal degree in co-relation 3853. Up to 823 conditions per place. [2024-06-27 21:50:18,886 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 46 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-27 21:50:18,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 470 flow [2024-06-27 21:50:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 21:50:18,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 21:50:18,889 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 282 flow. Second operand 5 states and 159 transitions. [2024-06-27 21:50:18,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 470 flow [2024-06-27 21:50:18,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 440 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:18,897 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 308 flow [2024-06-27 21:50:18,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-06-27 21:50:18,900 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-06-27 21:50:18,900 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 308 flow [2024-06-27 21:50:18,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 21:50:18,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:18,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:18,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:50:18,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:18,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash -142481310, now seen corresponding path program 1 times [2024-06-27 21:50:18,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:18,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2628516] [2024-06-27 21:50:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:19,064 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 21:50:19,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:19,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2628516] [2024-06-27 21:50:19,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2628516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:19,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:19,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841485934] [2024-06-27 21:50:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:19,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:19,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:19,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 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 21:50:19,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:19,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:19,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:19,324 INFO L124 PetriNetUnfolderBase]: 773/1470 cut-off events. [2024-06-27 21:50:19,324 INFO L125 PetriNetUnfolderBase]: For 1863/1869 co-relation queries the response was YES. [2024-06-27 21:50:19,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4161 conditions, 1470 events. 773/1470 cut-off events. For 1863/1869 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9080 event pairs, 59 based on Foata normal form. 9/1454 useless extension candidates. Maximal degree in co-relation 4137. Up to 923 conditions per place. [2024-06-27 21:50:19,335 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 59 selfloop transitions, 13 changer transitions 0/88 dead transitions. [2024-06-27 21:50:19,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 538 flow [2024-06-27 21:50:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 21:50:19,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977777777777778 [2024-06-27 21:50:19,337 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 308 flow. Second operand 5 states and 157 transitions. [2024-06-27 21:50:19,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 538 flow [2024-06-27 21:50:19,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 502 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:19,343 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 355 flow [2024-06-27 21:50:19,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-06-27 21:50:19,344 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2024-06-27 21:50:19,344 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 355 flow [2024-06-27 21:50:19,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 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 21:50:19,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:19,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:19,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:50:19,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:19,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -714318780, now seen corresponding path program 2 times [2024-06-27 21:50:19,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:19,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405325159] [2024-06-27 21:50:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:19,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:19,470 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 21:50:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405325159] [2024-06-27 21:50:19,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405325159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:19,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:19,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:19,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392141378] [2024-06-27 21:50:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:19,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:19,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 355 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 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 21:50:19,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:19,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:19,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:19,716 INFO L124 PetriNetUnfolderBase]: 813/1566 cut-off events. [2024-06-27 21:50:19,716 INFO L125 PetriNetUnfolderBase]: For 2159/2165 co-relation queries the response was YES. [2024-06-27 21:50:19,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4554 conditions, 1566 events. 813/1566 cut-off events. For 2159/2165 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9992 event pairs, 55 based on Foata normal form. 9/1554 useless extension candidates. Maximal degree in co-relation 4527. Up to 817 conditions per place. [2024-06-27 21:50:19,728 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 65 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-06-27 21:50:19,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 611 flow [2024-06-27 21:50:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 21:50:19,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 21:50:19,731 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 355 flow. Second operand 6 states and 183 transitions. [2024-06-27 21:50:19,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 611 flow [2024-06-27 21:50:19,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 605 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 21:50:19,739 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 413 flow [2024-06-27 21:50:19,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-06-27 21:50:19,740 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2024-06-27 21:50:19,741 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 413 flow [2024-06-27 21:50:19,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 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 21:50:19,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:19,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:19,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:50:19,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:19,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:19,742 INFO L85 PathProgramCache]: Analyzing trace with hash -49389240, now seen corresponding path program 3 times [2024-06-27 21:50:19,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:19,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740649355] [2024-06-27 21:50:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:19,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:19,887 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 21:50:19,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:19,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740649355] [2024-06-27 21:50:19,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740649355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:19,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:19,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:19,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722731099] [2024-06-27 21:50:19,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:19,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:19,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:19,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:19,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 413 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 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 21:50:19,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:19,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:19,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:20,114 INFO L124 PetriNetUnfolderBase]: 801/1606 cut-off events. [2024-06-27 21:50:20,114 INFO L125 PetriNetUnfolderBase]: For 3231/3237 co-relation queries the response was YES. [2024-06-27 21:50:20,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4808 conditions, 1606 events. 801/1606 cut-off events. For 3231/3237 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10355 event pairs, 91 based on Foata normal form. 9/1593 useless extension candidates. Maximal degree in co-relation 4777. Up to 813 conditions per place. [2024-06-27 21:50:20,129 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 64 selfloop transitions, 15 changer transitions 0/95 dead transitions. [2024-06-27 21:50:20,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 623 flow [2024-06-27 21:50:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 21:50:20,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 21:50:20,131 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 413 flow. Second operand 6 states and 181 transitions. [2024-06-27 21:50:20,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 623 flow [2024-06-27 21:50:20,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 95 transitions, 606 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:20,138 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 416 flow [2024-06-27 21:50:20,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-06-27 21:50:20,160 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-06-27 21:50:20,160 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 416 flow [2024-06-27 21:50:20,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 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 21:50:20,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:20,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:20,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:50:20,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:20,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1759928195, now seen corresponding path program 1 times [2024-06-27 21:50:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:20,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701217827] [2024-06-27 21:50:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:20,294 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 21:50:20,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:20,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701217827] [2024-06-27 21:50:20,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701217827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:20,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:20,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:50:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489979178] [2024-06-27 21:50:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:20,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:50:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:50:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:50:20,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:20,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 416 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 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 21:50:20,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:20,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:20,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:20,484 INFO L124 PetriNetUnfolderBase]: 736/1472 cut-off events. [2024-06-27 21:50:20,485 INFO L125 PetriNetUnfolderBase]: For 3345/3352 co-relation queries the response was YES. [2024-06-27 21:50:20,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 1472 events. 736/1472 cut-off events. For 3345/3352 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9546 event pairs, 320 based on Foata normal form. 9/1426 useless extension candidates. Maximal degree in co-relation 4486. Up to 1075 conditions per place. [2024-06-27 21:50:20,500 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 56 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-06-27 21:50:20,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 85 transitions, 631 flow [2024-06-27 21:50:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-27 21:50:20,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 21:50:20,505 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 416 flow. Second operand 4 states and 124 transitions. [2024-06-27 21:50:20,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 85 transitions, 631 flow [2024-06-27 21:50:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 583 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:20,516 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 454 flow [2024-06-27 21:50:20,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2024-06-27 21:50:20,518 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-06-27 21:50:20,518 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 454 flow [2024-06-27 21:50:20,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 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 21:50:20,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:20,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:20,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:50:20,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:20,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash 514492974, now seen corresponding path program 1 times [2024-06-27 21:50:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:20,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805043341] [2024-06-27 21:50:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:20,666 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 21:50:20,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805043341] [2024-06-27 21:50:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805043341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:20,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:20,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:20,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802255182] [2024-06-27 21:50:20,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:20,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:20,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:20,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:20,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:20,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 454 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:20,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:20,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:20,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:20,889 INFO L124 PetriNetUnfolderBase]: 763/1512 cut-off events. [2024-06-27 21:50:20,889 INFO L125 PetriNetUnfolderBase]: For 3496/3508 co-relation queries the response was YES. [2024-06-27 21:50:20,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4582 conditions, 1512 events. 763/1512 cut-off events. For 3496/3508 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10040 event pairs, 147 based on Foata normal form. 17/1480 useless extension candidates. Maximal degree in co-relation 4549. Up to 1002 conditions per place. [2024-06-27 21:50:20,902 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 49 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-27 21:50:20,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 610 flow [2024-06-27 21:50:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 21:50:20,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-27 21:50:20,903 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 454 flow. Second operand 4 states and 123 transitions. [2024-06-27 21:50:20,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 610 flow [2024-06-27 21:50:20,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 608 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:50:20,914 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 494 flow [2024-06-27 21:50:20,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=494, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-06-27 21:50:20,914 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2024-06-27 21:50:20,915 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 494 flow [2024-06-27 21:50:20,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:20,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:20,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:20,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:50:20,916 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:20,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash 480946944, now seen corresponding path program 2 times [2024-06-27 21:50:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127824467] [2024-06-27 21:50:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:20,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:21,037 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 21:50:21,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127824467] [2024-06-27 21:50:21,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127824467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:21,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:21,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:21,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219963058] [2024-06-27 21:50:21,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:21,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:21,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:21,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:21,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:21,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 494 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:21,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:21,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:21,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:21,251 INFO L124 PetriNetUnfolderBase]: 750/1515 cut-off events. [2024-06-27 21:50:21,251 INFO L125 PetriNetUnfolderBase]: For 4407/4429 co-relation queries the response was YES. [2024-06-27 21:50:21,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 1515 events. 750/1515 cut-off events. For 4407/4429 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10106 event pairs, 249 based on Foata normal form. 27/1488 useless extension candidates. Maximal degree in co-relation 4635. Up to 949 conditions per place. [2024-06-27 21:50:21,263 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 53 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-27 21:50:21,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 664 flow [2024-06-27 21:50:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 21:50:21,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 21:50:21,265 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 494 flow. Second operand 5 states and 149 transitions. [2024-06-27 21:50:21,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 664 flow [2024-06-27 21:50:21,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 638 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:21,273 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 500 flow [2024-06-27 21:50:21,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2024-06-27 21:50:21,274 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2024-06-27 21:50:21,274 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 500 flow [2024-06-27 21:50:21,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:21,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:21,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:21,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:50:21,275 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:21,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash -932758850, now seen corresponding path program 1 times [2024-06-27 21:50:21,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:21,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711500791] [2024-06-27 21:50:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:21,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:21,385 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 21:50:21,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:21,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711500791] [2024-06-27 21:50:21,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711500791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:21,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:21,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:21,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402362755] [2024-06-27 21:50:21,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:21,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:21,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:21,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:21,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:21,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 500 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:21,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:21,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:21,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:21,621 INFO L124 PetriNetUnfolderBase]: 771/1581 cut-off events. [2024-06-27 21:50:21,621 INFO L125 PetriNetUnfolderBase]: For 4276/4281 co-relation queries the response was YES. [2024-06-27 21:50:21,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4956 conditions, 1581 events. 771/1581 cut-off events. For 4276/4281 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10617 event pairs, 173 based on Foata normal form. 9/1550 useless extension candidates. Maximal degree in co-relation 4919. Up to 1024 conditions per place. [2024-06-27 21:50:21,637 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 64 selfloop transitions, 20 changer transitions 0/103 dead transitions. [2024-06-27 21:50:21,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 776 flow [2024-06-27 21:50:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 21:50:21,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-27 21:50:21,638 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 500 flow. Second operand 6 states and 187 transitions. [2024-06-27 21:50:21,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 776 flow [2024-06-27 21:50:21,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 103 transitions, 746 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:21,650 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 547 flow [2024-06-27 21:50:21,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=547, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2024-06-27 21:50:21,651 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2024-06-27 21:50:21,651 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 547 flow [2024-06-27 21:50:21,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:21,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:21,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:21,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:50:21,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:21,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1103456444, now seen corresponding path program 1 times [2024-06-27 21:50:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:21,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530634698] [2024-06-27 21:50:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:21,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:21,771 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 21:50:21,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:21,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530634698] [2024-06-27 21:50:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530634698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:21,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:21,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096200064] [2024-06-27 21:50:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:21,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:21,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 547 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 21:50:21,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:21,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:21,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:22,034 INFO L124 PetriNetUnfolderBase]: 894/1715 cut-off events. [2024-06-27 21:50:22,035 INFO L125 PetriNetUnfolderBase]: For 4406/4406 co-relation queries the response was YES. [2024-06-27 21:50:22,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5570 conditions, 1715 events. 894/1715 cut-off events. For 4406/4406 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11166 event pairs, 196 based on Foata normal form. 2/1665 useless extension candidates. Maximal degree in co-relation 5532. Up to 1276 conditions per place. [2024-06-27 21:50:22,047 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 81 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2024-06-27 21:50:22,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 113 transitions, 916 flow [2024-06-27 21:50:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 21:50:22,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:50:22,049 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 547 flow. Second operand 6 states and 180 transitions. [2024-06-27 21:50:22,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 113 transitions, 916 flow [2024-06-27 21:50:22,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 864 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:22,068 INFO L231 Difference]: Finished difference. Result has 95 places, 86 transitions, 641 flow [2024-06-27 21:50:22,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=641, PETRI_PLACES=95, PETRI_TRANSITIONS=86} [2024-06-27 21:50:22,069 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 46 predicate places. [2024-06-27 21:50:22,069 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 86 transitions, 641 flow [2024-06-27 21:50:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 21:50:22,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:22,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:50:22,070 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:22,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1103456630, now seen corresponding path program 2 times [2024-06-27 21:50:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:22,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387855135] [2024-06-27 21:50:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:22,198 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 21:50:22,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:22,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387855135] [2024-06-27 21:50:22,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387855135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:22,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:22,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:22,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598147962] [2024-06-27 21:50:22,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:22,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:22,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:22,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:22,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 86 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:22,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:22,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:22,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:22,453 INFO L124 PetriNetUnfolderBase]: 864/1692 cut-off events. [2024-06-27 21:50:22,453 INFO L125 PetriNetUnfolderBase]: For 5032/5037 co-relation queries the response was YES. [2024-06-27 21:50:22,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 1692 events. 864/1692 cut-off events. For 5032/5037 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11273 event pairs, 200 based on Foata normal form. 9/1646 useless extension candidates. Maximal degree in co-relation 5517. Up to 1200 conditions per place. [2024-06-27 21:50:22,470 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 66 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-27 21:50:22,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 113 transitions, 920 flow [2024-06-27 21:50:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 21:50:22,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 21:50:22,473 INFO L175 Difference]: Start difference. First operand has 95 places, 86 transitions, 641 flow. Second operand 6 states and 182 transitions. [2024-06-27 21:50:22,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 113 transitions, 920 flow [2024-06-27 21:50:22,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 894 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:22,491 INFO L231 Difference]: Finished difference. Result has 99 places, 91 transitions, 722 flow [2024-06-27 21:50:22,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=722, PETRI_PLACES=99, PETRI_TRANSITIONS=91} [2024-06-27 21:50:22,492 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-06-27 21:50:22,493 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 91 transitions, 722 flow [2024-06-27 21:50:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:22,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:22,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:22,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:50:22,493 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:22,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:22,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1088408938, now seen corresponding path program 2 times [2024-06-27 21:50:22,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798518184] [2024-06-27 21:50:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:22,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:22,609 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 21:50:22,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:22,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798518184] [2024-06-27 21:50:22,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798518184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:22,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:22,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:22,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35694890] [2024-06-27 21:50:22,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:22,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:22,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:22,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:22,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 91 transitions, 722 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 21:50:22,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:22,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:22,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:22,834 INFO L124 PetriNetUnfolderBase]: 959/1833 cut-off events. [2024-06-27 21:50:22,835 INFO L125 PetriNetUnfolderBase]: For 5924/5930 co-relation queries the response was YES. [2024-06-27 21:50:22,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6167 conditions, 1833 events. 959/1833 cut-off events. For 5924/5930 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12106 event pairs, 200 based on Foata normal form. 6/1786 useless extension candidates. Maximal degree in co-relation 6125. Up to 1359 conditions per place. [2024-06-27 21:50:22,852 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 80 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-06-27 21:50:22,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 114 transitions, 1019 flow [2024-06-27 21:50:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 21:50:22,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:50:22,854 INFO L175 Difference]: Start difference. First operand has 99 places, 91 transitions, 722 flow. Second operand 5 states and 150 transitions. [2024-06-27 21:50:22,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 114 transitions, 1019 flow [2024-06-27 21:50:22,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 114 transitions, 959 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:22,872 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 745 flow [2024-06-27 21:50:22,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=745, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2024-06-27 21:50:22,874 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-06-27 21:50:22,874 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 745 flow [2024-06-27 21:50:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 21:50:22,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:22,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:22,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:50:22,875 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:22,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash 480715560, now seen corresponding path program 3 times [2024-06-27 21:50:22,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:22,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847293988] [2024-06-27 21:50:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:22,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:22,989 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 21:50:22,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:22,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847293988] [2024-06-27 21:50:22,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847293988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:22,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:22,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:22,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719214745] [2024-06-27 21:50:22,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:22,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:23,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 21:50:23,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 745 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:23,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:23,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 21:50:23,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:23,267 INFO L124 PetriNetUnfolderBase]: 870/1710 cut-off events. [2024-06-27 21:50:23,268 INFO L125 PetriNetUnfolderBase]: For 5554/5559 co-relation queries the response was YES. [2024-06-27 21:50:23,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5683 conditions, 1710 events. 870/1710 cut-off events. For 5554/5559 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11447 event pairs, 156 based on Foata normal form. 9/1676 useless extension candidates. Maximal degree in co-relation 5639. Up to 1126 conditions per place. [2024-06-27 21:50:23,282 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 65 selfloop transitions, 28 changer transitions 0/117 dead transitions. [2024-06-27 21:50:23,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 117 transitions, 983 flow [2024-06-27 21:50:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 21:50:23,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 21:50:23,284 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 745 flow. Second operand 5 states and 159 transitions. [2024-06-27 21:50:23,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 117 transitions, 983 flow [2024-06-27 21:50:23,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 117 transitions, 959 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 21:50:23,302 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 791 flow [2024-06-27 21:50:23,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=791, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2024-06-27 21:50:23,303 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2024-06-27 21:50:23,303 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 791 flow [2024-06-27 21:50:23,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 21:50:23,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:23,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:23,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:50:23,304 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:23,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:23,305 INFO L85 PathProgramCache]: Analyzing trace with hash 480715746, now seen corresponding path program 3 times [2024-06-27 21:50:23,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:23,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16462754] [2024-06-27 21:50:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:23,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:23,424 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 21:50:23,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16462754] [2024-06-27 21:50:23,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16462754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:23,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:23,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458762305] [2024-06-27 21:50:23,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:23,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:23,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:23,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:23,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:23,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 791 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 21:50:23,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:23,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:23,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:23,672 INFO L124 PetriNetUnfolderBase]: 944/1799 cut-off events. [2024-06-27 21:50:23,672 INFO L125 PetriNetUnfolderBase]: For 5958/5958 co-relation queries the response was YES. [2024-06-27 21:50:23,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6156 conditions, 1799 events. 944/1799 cut-off events. For 5958/5958 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11792 event pairs, 191 based on Foata normal form. 2/1752 useless extension candidates. Maximal degree in co-relation 6110. Up to 1341 conditions per place. [2024-06-27 21:50:23,685 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 82 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2024-06-27 21:50:23,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 117 transitions, 1048 flow [2024-06-27 21:50:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 21:50:23,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 21:50:23,687 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 791 flow. Second operand 5 states and 153 transitions. [2024-06-27 21:50:23,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 117 transitions, 1048 flow [2024-06-27 21:50:23,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 117 transitions, 986 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:23,707 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 775 flow [2024-06-27 21:50:23,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=775, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2024-06-27 21:50:23,708 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 58 predicate places. [2024-06-27 21:50:23,708 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 775 flow [2024-06-27 21:50:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 21:50:23,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:23,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:50:23,709 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:23,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash 148864998, now seen corresponding path program 1 times [2024-06-27 21:50:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078583844] [2024-06-27 21:50:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:23,821 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 21:50:23,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:23,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078583844] [2024-06-27 21:50:23,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078583844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:23,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:23,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:23,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323889077] [2024-06-27 21:50:23,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:23,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:23,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:23,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:23,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 775 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:23,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:23,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:23,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:24,122 INFO L124 PetriNetUnfolderBase]: 972/1867 cut-off events. [2024-06-27 21:50:24,122 INFO L125 PetriNetUnfolderBase]: For 5996/5996 co-relation queries the response was YES. [2024-06-27 21:50:24,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6245 conditions, 1867 events. 972/1867 cut-off events. For 5996/5996 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12426 event pairs, 321 based on Foata normal form. 4/1816 useless extension candidates. Maximal degree in co-relation 6198. Up to 1201 conditions per place. [2024-06-27 21:50:24,171 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 99 selfloop transitions, 22 changer transitions 0/137 dead transitions. [2024-06-27 21:50:24,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 137 transitions, 1168 flow [2024-06-27 21:50:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 21:50:24,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:50:24,173 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 775 flow. Second operand 7 states and 210 transitions. [2024-06-27 21:50:24,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 137 transitions, 1168 flow [2024-06-27 21:50:24,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 137 transitions, 1132 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:24,196 INFO L231 Difference]: Finished difference. Result has 112 places, 99 transitions, 828 flow [2024-06-27 21:50:24,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=112, PETRI_TRANSITIONS=99} [2024-06-27 21:50:24,197 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-27 21:50:24,197 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 99 transitions, 828 flow [2024-06-27 21:50:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:24,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:24,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:24,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:50:24,198 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:24,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -932070676, now seen corresponding path program 2 times [2024-06-27 21:50:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:24,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236998856] [2024-06-27 21:50:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:24,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:24,333 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 21:50:24,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:24,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236998856] [2024-06-27 21:50:24,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236998856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:24,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:24,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:24,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322197055] [2024-06-27 21:50:24,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:24,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:24,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:24,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 99 transitions, 828 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:24,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:24,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:24,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:24,645 INFO L124 PetriNetUnfolderBase]: 1036/1991 cut-off events. [2024-06-27 21:50:24,645 INFO L125 PetriNetUnfolderBase]: For 6702/6702 co-relation queries the response was YES. [2024-06-27 21:50:24,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6822 conditions, 1991 events. 1036/1991 cut-off events. For 6702/6702 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13495 event pairs, 191 based on Foata normal form. 4/1944 useless extension candidates. Maximal degree in co-relation 6773. Up to 1391 conditions per place. [2024-06-27 21:50:24,663 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 104 selfloop transitions, 23 changer transitions 0/143 dead transitions. [2024-06-27 21:50:24,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 143 transitions, 1229 flow [2024-06-27 21:50:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:50:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:50:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-06-27 21:50:24,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 21:50:24,667 INFO L175 Difference]: Start difference. First operand has 112 places, 99 transitions, 828 flow. Second operand 9 states and 258 transitions. [2024-06-27 21:50:24,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 143 transitions, 1229 flow [2024-06-27 21:50:24,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 143 transitions, 1183 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:24,726 INFO L231 Difference]: Finished difference. Result has 119 places, 103 transitions, 867 flow [2024-06-27 21:50:24,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=867, PETRI_PLACES=119, PETRI_TRANSITIONS=103} [2024-06-27 21:50:24,727 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 70 predicate places. [2024-06-27 21:50:24,727 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 103 transitions, 867 flow [2024-06-27 21:50:24,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:24,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:24,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:24,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:50:24,728 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:24,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 152584068, now seen corresponding path program 3 times [2024-06-27 21:50:24,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:24,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294785625] [2024-06-27 21:50:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:24,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:24,856 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 21:50:24,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294785625] [2024-06-27 21:50:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294785625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:24,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:24,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057279198] [2024-06-27 21:50:24,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:24,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:24,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:24,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 103 transitions, 867 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:24,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:24,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:24,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:25,190 INFO L124 PetriNetUnfolderBase]: 1028/2007 cut-off events. [2024-06-27 21:50:25,191 INFO L125 PetriNetUnfolderBase]: For 7325/7325 co-relation queries the response was YES. [2024-06-27 21:50:25,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 2007 events. 1028/2007 cut-off events. For 7325/7325 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13758 event pairs, 219 based on Foata normal form. 4/1958 useless extension candidates. Maximal degree in co-relation 6700. Up to 1387 conditions per place. [2024-06-27 21:50:25,209 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 97 selfloop transitions, 22 changer transitions 0/135 dead transitions. [2024-06-27 21:50:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 135 transitions, 1180 flow [2024-06-27 21:50:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 21:50:25,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 21:50:25,211 INFO L175 Difference]: Start difference. First operand has 119 places, 103 transitions, 867 flow. Second operand 7 states and 207 transitions. [2024-06-27 21:50:25,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 135 transitions, 1180 flow [2024-06-27 21:50:25,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 135 transitions, 1167 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:25,234 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 902 flow [2024-06-27 21:50:25,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2024-06-27 21:50:25,235 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2024-06-27 21:50:25,235 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 902 flow [2024-06-27 21:50:25,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:25,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:25,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:25,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:50:25,236 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:25,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:25,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2017281702, now seen corresponding path program 4 times [2024-06-27 21:50:25,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:25,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929268899] [2024-06-27 21:50:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:25,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:25,356 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 21:50:25,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:25,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929268899] [2024-06-27 21:50:25,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929268899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:25,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:25,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:25,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741553487] [2024-06-27 21:50:25,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:25,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:25,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:25,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:25,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:25,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:25,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 902 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:25,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:25,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:25,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:25,708 INFO L124 PetriNetUnfolderBase]: 1056/2055 cut-off events. [2024-06-27 21:50:25,708 INFO L125 PetriNetUnfolderBase]: For 7484/7484 co-relation queries the response was YES. [2024-06-27 21:50:25,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7082 conditions, 2055 events. 1056/2055 cut-off events. For 7484/7484 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14124 event pairs, 329 based on Foata normal form. 4/2002 useless extension candidates. Maximal degree in co-relation 7029. Up to 1303 conditions per place. [2024-06-27 21:50:25,725 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 96 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2024-06-27 21:50:25,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 137 transitions, 1266 flow [2024-06-27 21:50:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 21:50:25,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 21:50:25,727 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 902 flow. Second operand 6 states and 185 transitions. [2024-06-27 21:50:25,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 137 transitions, 1266 flow [2024-06-27 21:50:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1222 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:25,750 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 941 flow [2024-06-27 21:50:25,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=941, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2024-06-27 21:50:25,752 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 75 predicate places. [2024-06-27 21:50:25,752 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 941 flow [2024-06-27 21:50:25,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:25,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:25,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:25,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:50:25,753 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:25,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2017287282, now seen corresponding path program 5 times [2024-06-27 21:50:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661965568] [2024-06-27 21:50:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:25,867 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 21:50:25,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:25,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661965568] [2024-06-27 21:50:25,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661965568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:25,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:25,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:25,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982428292] [2024-06-27 21:50:25,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:25,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:25,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:25,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:25,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:25,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 941 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:25,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:25,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:25,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:26,222 INFO L124 PetriNetUnfolderBase]: 1084/2075 cut-off events. [2024-06-27 21:50:26,223 INFO L125 PetriNetUnfolderBase]: For 8420/8420 co-relation queries the response was YES. [2024-06-27 21:50:26,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7438 conditions, 2075 events. 1084/2075 cut-off events. For 8420/8420 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14146 event pairs, 185 based on Foata normal form. 4/2030 useless extension candidates. Maximal degree in co-relation 7383. Up to 1319 conditions per place. [2024-06-27 21:50:26,241 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 103 selfloop transitions, 28 changer transitions 0/147 dead transitions. [2024-06-27 21:50:26,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1341 flow [2024-06-27 21:50:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 21:50:26,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 21:50:26,244 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 941 flow. Second operand 8 states and 237 transitions. [2024-06-27 21:50:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1341 flow [2024-06-27 21:50:26,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 147 transitions, 1287 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:26,276 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 960 flow [2024-06-27 21:50:26,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=960, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2024-06-27 21:50:26,277 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2024-06-27 21:50:26,277 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 960 flow [2024-06-27 21:50:26,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:26,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:26,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:26,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:50:26,278 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:26,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2024638932, now seen corresponding path program 6 times [2024-06-27 21:50:26,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:26,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280618597] [2024-06-27 21:50:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:26,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:26,405 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 21:50:26,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280618597] [2024-06-27 21:50:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280618597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:26,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:26,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:26,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075328264] [2024-06-27 21:50:26,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:26,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:26,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:26,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 960 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:26,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:26,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:26,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:26,749 INFO L124 PetriNetUnfolderBase]: 1076/2092 cut-off events. [2024-06-27 21:50:26,749 INFO L125 PetriNetUnfolderBase]: For 8956/8965 co-relation queries the response was YES. [2024-06-27 21:50:26,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7399 conditions, 2092 events. 1076/2092 cut-off events. For 8956/8965 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 14516 event pairs, 189 based on Foata normal form. 10/2053 useless extension candidates. Maximal degree in co-relation 7344. Up to 1315 conditions per place. [2024-06-27 21:50:26,767 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 98 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2024-06-27 21:50:26,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 142 transitions, 1302 flow [2024-06-27 21:50:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 21:50:26,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 21:50:26,770 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 960 flow. Second operand 8 states and 231 transitions. [2024-06-27 21:50:26,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 142 transitions, 1302 flow [2024-06-27 21:50:26,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 142 transitions, 1252 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:26,799 INFO L231 Difference]: Finished difference. Result has 129 places, 107 transitions, 979 flow [2024-06-27 21:50:26,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=979, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2024-06-27 21:50:26,801 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 80 predicate places. [2024-06-27 21:50:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 979 flow [2024-06-27 21:50:26,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:26,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:26,801 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 21:50:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:50:26,802 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:26,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1655927301, now seen corresponding path program 1 times [2024-06-27 21:50:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:26,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580613080] [2024-06-27 21:50:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:26,920 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 21:50:26,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580613080] [2024-06-27 21:50:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580613080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:26,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:26,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40603447] [2024-06-27 21:50:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:26,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:26,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 979 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:26,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:26,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:27,282 INFO L124 PetriNetUnfolderBase]: 1117/2210 cut-off events. [2024-06-27 21:50:27,282 INFO L125 PetriNetUnfolderBase]: For 9056/9065 co-relation queries the response was YES. [2024-06-27 21:50:27,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7712 conditions, 2210 events. 1117/2210 cut-off events. For 9056/9065 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15368 event pairs, 266 based on Foata normal form. 8/2157 useless extension candidates. Maximal degree in co-relation 7657. Up to 1483 conditions per place. [2024-06-27 21:50:27,299 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 90 selfloop transitions, 38 changer transitions 0/144 dead transitions. [2024-06-27 21:50:27,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 144 transitions, 1377 flow [2024-06-27 21:50:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 21:50:27,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:50:27,301 INFO L175 Difference]: Start difference. First operand has 129 places, 107 transitions, 979 flow. Second operand 8 states and 236 transitions. [2024-06-27 21:50:27,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 144 transitions, 1377 flow [2024-06-27 21:50:27,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 144 transitions, 1329 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:27,331 INFO L231 Difference]: Finished difference. Result has 133 places, 113 transitions, 1067 flow [2024-06-27 21:50:27,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1067, PETRI_PLACES=133, PETRI_TRANSITIONS=113} [2024-06-27 21:50:27,332 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 84 predicate places. [2024-06-27 21:50:27,332 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 113 transitions, 1067 flow [2024-06-27 21:50:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:27,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:27,333 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 21:50:27,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:50:27,333 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:27,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash 793519873, now seen corresponding path program 2 times [2024-06-27 21:50:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:27,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666630382] [2024-06-27 21:50:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:27,466 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 21:50:27,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:27,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666630382] [2024-06-27 21:50:27,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666630382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:27,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:27,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749758318] [2024-06-27 21:50:27,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:27,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:27,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:27,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 113 transitions, 1067 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:27,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:27,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:27,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:27,794 INFO L124 PetriNetUnfolderBase]: 1135/2170 cut-off events. [2024-06-27 21:50:27,794 INFO L125 PetriNetUnfolderBase]: For 9367/9376 co-relation queries the response was YES. [2024-06-27 21:50:27,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7888 conditions, 2170 events. 1135/2170 cut-off events. For 9367/9376 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14974 event pairs, 230 based on Foata normal form. 8/2116 useless extension candidates. Maximal degree in co-relation 7830. Up to 1499 conditions per place. [2024-06-27 21:50:27,810 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 89 selfloop transitions, 38 changer transitions 0/143 dead transitions. [2024-06-27 21:50:27,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 143 transitions, 1437 flow [2024-06-27 21:50:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 21:50:27,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 21:50:27,812 INFO L175 Difference]: Start difference. First operand has 133 places, 113 transitions, 1067 flow. Second operand 7 states and 209 transitions. [2024-06-27 21:50:27,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 143 transitions, 1437 flow [2024-06-27 21:50:27,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 143 transitions, 1387 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:27,847 INFO L231 Difference]: Finished difference. Result has 137 places, 115 transitions, 1125 flow [2024-06-27 21:50:27,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1125, PETRI_PLACES=137, PETRI_TRANSITIONS=115} [2024-06-27 21:50:27,848 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 88 predicate places. [2024-06-27 21:50:27,848 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 115 transitions, 1125 flow [2024-06-27 21:50:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:27,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:27,848 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 21:50:27,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:50:27,849 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:27,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:27,849 INFO L85 PathProgramCache]: Analyzing trace with hash 793757023, now seen corresponding path program 3 times [2024-06-27 21:50:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014414360] [2024-06-27 21:50:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:27,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:27,961 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 21:50:27,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:27,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014414360] [2024-06-27 21:50:27,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014414360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:27,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:27,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034742902] [2024-06-27 21:50:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:27,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:27,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:27,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 115 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:27,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:27,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:27,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:28,276 INFO L124 PetriNetUnfolderBase]: 1130/2205 cut-off events. [2024-06-27 21:50:28,277 INFO L125 PetriNetUnfolderBase]: For 11319/11337 co-relation queries the response was YES. [2024-06-27 21:50:28,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8047 conditions, 2205 events. 1130/2205 cut-off events. For 11319/11337 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15514 event pairs, 236 based on Foata normal form. 14/2143 useless extension candidates. Maximal degree in co-relation 7987. Up to 1495 conditions per place. [2024-06-27 21:50:28,297 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 82 selfloop transitions, 34 changer transitions 0/132 dead transitions. [2024-06-27 21:50:28,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1395 flow [2024-06-27 21:50:28,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 21:50:28,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-27 21:50:28,299 INFO L175 Difference]: Start difference. First operand has 137 places, 115 transitions, 1125 flow. Second operand 5 states and 152 transitions. [2024-06-27 21:50:28,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1395 flow [2024-06-27 21:50:28,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 1309 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:28,336 INFO L231 Difference]: Finished difference. Result has 136 places, 115 transitions, 1115 flow [2024-06-27 21:50:28,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1115, PETRI_PLACES=136, PETRI_TRANSITIONS=115} [2024-06-27 21:50:28,337 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 87 predicate places. [2024-06-27 21:50:28,337 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 115 transitions, 1115 flow [2024-06-27 21:50:28,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:28,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:28,337 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 21:50:28,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:50:28,338 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1191501439, now seen corresponding path program 4 times [2024-06-27 21:50:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481156366] [2024-06-27 21:50:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:28,448 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 21:50:28,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:28,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481156366] [2024-06-27 21:50:28,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481156366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:28,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:28,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:28,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267148020] [2024-06-27 21:50:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:28,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:28,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:28,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:28,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:28,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:28,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 115 transitions, 1115 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:28,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:28,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:28,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:28,786 INFO L124 PetriNetUnfolderBase]: 1148/2277 cut-off events. [2024-06-27 21:50:28,787 INFO L125 PetriNetUnfolderBase]: For 10463/10472 co-relation queries the response was YES. [2024-06-27 21:50:28,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8100 conditions, 2277 events. 1148/2277 cut-off events. For 10463/10472 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15957 event pairs, 303 based on Foata normal form. 8/2214 useless extension candidates. Maximal degree in co-relation 8041. Up to 1448 conditions per place. [2024-06-27 21:50:28,804 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 95 selfloop transitions, 39 changer transitions 0/150 dead transitions. [2024-06-27 21:50:28,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 150 transitions, 1527 flow [2024-06-27 21:50:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 21:50:28,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:50:28,806 INFO L175 Difference]: Start difference. First operand has 136 places, 115 transitions, 1115 flow. Second operand 7 states and 210 transitions. [2024-06-27 21:50:28,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 150 transitions, 1527 flow [2024-06-27 21:50:28,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 150 transitions, 1452 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:28,838 INFO L231 Difference]: Finished difference. Result has 139 places, 121 transitions, 1187 flow [2024-06-27 21:50:28,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1187, PETRI_PLACES=139, PETRI_TRANSITIONS=121} [2024-06-27 21:50:28,839 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 90 predicate places. [2024-06-27 21:50:28,839 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 121 transitions, 1187 flow [2024-06-27 21:50:28,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:28,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:28,839 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 21:50:28,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:50:28,841 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:28,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1542130393, now seen corresponding path program 5 times [2024-06-27 21:50:28,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:28,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286606180] [2024-06-27 21:50:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:28,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:28,945 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 21:50:28,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:28,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286606180] [2024-06-27 21:50:28,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286606180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:28,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:28,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:28,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413002351] [2024-06-27 21:50:28,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:28,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:28,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:28,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:28,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 121 transitions, 1187 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:28,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:28,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:28,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:29,232 INFO L124 PetriNetUnfolderBase]: 1166/2215 cut-off events. [2024-06-27 21:50:29,232 INFO L125 PetriNetUnfolderBase]: For 9047/9056 co-relation queries the response was YES. [2024-06-27 21:50:29,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8303 conditions, 2215 events. 1166/2215 cut-off events. For 9047/9056 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 15269 event pairs, 242 based on Foata normal form. 8/2157 useless extension candidates. Maximal degree in co-relation 8243. Up to 1464 conditions per place. [2024-06-27 21:50:29,249 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 91 selfloop transitions, 42 changer transitions 0/149 dead transitions. [2024-06-27 21:50:29,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 149 transitions, 1567 flow [2024-06-27 21:50:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 21:50:29,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 21:50:29,251 INFO L175 Difference]: Start difference. First operand has 139 places, 121 transitions, 1187 flow. Second operand 6 states and 183 transitions. [2024-06-27 21:50:29,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 149 transitions, 1567 flow [2024-06-27 21:50:29,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 149 transitions, 1536 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:29,291 INFO L231 Difference]: Finished difference. Result has 143 places, 123 transitions, 1268 flow [2024-06-27 21:50:29,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1268, PETRI_PLACES=143, PETRI_TRANSITIONS=123} [2024-06-27 21:50:29,291 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 94 predicate places. [2024-06-27 21:50:29,292 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 123 transitions, 1268 flow [2024-06-27 21:50:29,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:29,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:29,292 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 21:50:29,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:50:29,292 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:29,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1666423329, now seen corresponding path program 6 times [2024-06-27 21:50:29,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:29,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821256447] [2024-06-27 21:50:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:29,403 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 21:50:29,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821256447] [2024-06-27 21:50:29,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821256447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:29,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:29,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:29,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179380147] [2024-06-27 21:50:29,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:29,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:29,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:29,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:29,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:29,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:29,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 123 transitions, 1268 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:29,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:29,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:29,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:29,761 INFO L124 PetriNetUnfolderBase]: 1184/2283 cut-off events. [2024-06-27 21:50:29,761 INFO L125 PetriNetUnfolderBase]: For 12124/12142 co-relation queries the response was YES. [2024-06-27 21:50:29,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8699 conditions, 2283 events. 1184/2283 cut-off events. For 12124/12142 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 16015 event pairs, 244 based on Foata normal form. 14/2217 useless extension candidates. Maximal degree in co-relation 8636. Up to 1480 conditions per place. [2024-06-27 21:50:29,784 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 89 selfloop transitions, 42 changer transitions 0/147 dead transitions. [2024-06-27 21:50:29,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 147 transitions, 1640 flow [2024-06-27 21:50:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 21:50:29,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 21:50:29,786 INFO L175 Difference]: Start difference. First operand has 143 places, 123 transitions, 1268 flow. Second operand 6 states and 179 transitions. [2024-06-27 21:50:29,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 147 transitions, 1640 flow [2024-06-27 21:50:29,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 147 transitions, 1566 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:29,826 INFO L231 Difference]: Finished difference. Result has 145 places, 125 transitions, 1309 flow [2024-06-27 21:50:29,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=145, PETRI_TRANSITIONS=125} [2024-06-27 21:50:29,829 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 96 predicate places. [2024-06-27 21:50:29,829 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 125 transitions, 1309 flow [2024-06-27 21:50:29,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:29,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:29,830 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 21:50:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:50:29,830 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:29,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:29,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1660709409, now seen corresponding path program 7 times [2024-06-27 21:50:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:29,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302189881] [2024-06-27 21:50:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:29,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:29,937 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 21:50:29,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:29,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302189881] [2024-06-27 21:50:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302189881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:29,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:29,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974588531] [2024-06-27 21:50:29,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:29,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:29,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 125 transitions, 1309 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:29,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:29,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:29,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:30,268 INFO L124 PetriNetUnfolderBase]: 1179/2276 cut-off events. [2024-06-27 21:50:30,269 INFO L125 PetriNetUnfolderBase]: For 11909/11927 co-relation queries the response was YES. [2024-06-27 21:50:30,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8627 conditions, 2276 events. 1179/2276 cut-off events. For 11909/11927 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 16037 event pairs, 248 based on Foata normal form. 14/2206 useless extension candidates. Maximal degree in co-relation 8564. Up to 1476 conditions per place. [2024-06-27 21:50:30,289 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 89 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-27 21:50:30,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 146 transitions, 1615 flow [2024-06-27 21:50:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 21:50:30,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 21:50:30,291 INFO L175 Difference]: Start difference. First operand has 145 places, 125 transitions, 1309 flow. Second operand 6 states and 178 transitions. [2024-06-27 21:50:30,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 146 transitions, 1615 flow [2024-06-27 21:50:30,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 146 transitions, 1492 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:30,330 INFO L231 Difference]: Finished difference. Result has 147 places, 125 transitions, 1273 flow [2024-06-27 21:50:30,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1273, PETRI_PLACES=147, PETRI_TRANSITIONS=125} [2024-06-27 21:50:30,331 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 98 predicate places. [2024-06-27 21:50:30,332 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 125 transitions, 1273 flow [2024-06-27 21:50:30,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 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 21:50:30,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:30,332 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 21:50:30,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:50:30,332 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:30,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash -518947048, now seen corresponding path program 1 times [2024-06-27 21:50:30,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97195743] [2024-06-27 21:50:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:30,457 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 21:50:30,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:30,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97195743] [2024-06-27 21:50:30,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97195743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:30,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:30,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:50:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350209225] [2024-06-27 21:50:30,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:30,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:50:30,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:50:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:50:30,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 45 [2024-06-27 21:50:30,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 125 transitions, 1273 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 21:50:30,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:30,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 45 [2024-06-27 21:50:30,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:30,746 INFO L124 PetriNetUnfolderBase]: 1061/2501 cut-off events. [2024-06-27 21:50:30,747 INFO L125 PetriNetUnfolderBase]: For 1473/1495 co-relation queries the response was YES. [2024-06-27 21:50:30,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 2501 events. 1061/2501 cut-off events. For 1473/1495 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20616 event pairs, 161 based on Foata normal form. 131/2508 useless extension candidates. Maximal degree in co-relation 5009. Up to 970 conditions per place. [2024-06-27 21:50:30,763 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 30 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2024-06-27 21:50:30,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 142 transitions, 1381 flow [2024-06-27 21:50:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-27 21:50:30,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7611111111111111 [2024-06-27 21:50:30,768 INFO L175 Difference]: Start difference. First operand has 147 places, 125 transitions, 1273 flow. Second operand 4 states and 137 transitions. [2024-06-27 21:50:30,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 142 transitions, 1381 flow [2024-06-27 21:50:30,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 142 transitions, 1296 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:30,781 INFO L231 Difference]: Finished difference. Result has 148 places, 129 transitions, 1226 flow [2024-06-27 21:50:30,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1226, PETRI_PLACES=148, PETRI_TRANSITIONS=129} [2024-06-27 21:50:30,781 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2024-06-27 21:50:30,782 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 129 transitions, 1226 flow [2024-06-27 21:50:30,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 21:50:30,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:30,782 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 21:50:30,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:50:30,783 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:30,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1109809711, now seen corresponding path program 1 times [2024-06-27 21:50:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:30,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105725004] [2024-06-27 21:50:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:30,920 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 21:50:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:30,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105725004] [2024-06-27 21:50:30,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105725004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:30,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:30,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:30,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524610283] [2024-06-27 21:50:30,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:30,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:30,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:30,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 129 transitions, 1226 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:30,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:30,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:30,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:31,348 INFO L124 PetriNetUnfolderBase]: 1732/3386 cut-off events. [2024-06-27 21:50:31,349 INFO L125 PetriNetUnfolderBase]: For 14532/14604 co-relation queries the response was YES. [2024-06-27 21:50:31,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11611 conditions, 3386 events. 1732/3386 cut-off events. For 14532/14604 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25474 event pairs, 368 based on Foata normal form. 16/3146 useless extension candidates. Maximal degree in co-relation 11546. Up to 1913 conditions per place. [2024-06-27 21:50:31,378 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 98 selfloop transitions, 41 changer transitions 0/159 dead transitions. [2024-06-27 21:50:31,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 159 transitions, 1642 flow [2024-06-27 21:50:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 21:50:31,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-27 21:50:31,381 INFO L175 Difference]: Start difference. First operand has 148 places, 129 transitions, 1226 flow. Second operand 6 states and 187 transitions. [2024-06-27 21:50:31,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 159 transitions, 1642 flow [2024-06-27 21:50:31,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 159 transitions, 1640 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:50:31,429 INFO L231 Difference]: Finished difference. Result has 153 places, 131 transitions, 1337 flow [2024-06-27 21:50:31,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1337, PETRI_PLACES=153, PETRI_TRANSITIONS=131} [2024-06-27 21:50:31,430 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 104 predicate places. [2024-06-27 21:50:31,430 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 131 transitions, 1337 flow [2024-06-27 21:50:31,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:31,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:31,430 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 21:50:31,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:50:31,431 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:31,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:31,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1260483809, now seen corresponding path program 1 times [2024-06-27 21:50:31,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:31,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388514933] [2024-06-27 21:50:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:31,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:31,554 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 21:50:31,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:31,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388514933] [2024-06-27 21:50:31,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388514933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:31,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:31,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:31,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768657831] [2024-06-27 21:50:31,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:31,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:31,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:31,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:31,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:31,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:31,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 131 transitions, 1337 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:31,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:31,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:31,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:32,082 INFO L124 PetriNetUnfolderBase]: 1910/3766 cut-off events. [2024-06-27 21:50:32,082 INFO L125 PetriNetUnfolderBase]: For 19259/19337 co-relation queries the response was YES. [2024-06-27 21:50:32,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13397 conditions, 3766 events. 1910/3766 cut-off events. For 19259/19337 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 29196 event pairs, 533 based on Foata normal form. 18/3473 useless extension candidates. Maximal degree in co-relation 13330. Up to 2269 conditions per place. [2024-06-27 21:50:32,115 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 110 selfloop transitions, 48 changer transitions 0/178 dead transitions. [2024-06-27 21:50:32,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 178 transitions, 1992 flow [2024-06-27 21:50:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 21:50:32,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730158730158731 [2024-06-27 21:50:32,116 INFO L175 Difference]: Start difference. First operand has 153 places, 131 transitions, 1337 flow. Second operand 7 states and 212 transitions. [2024-06-27 21:50:32,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 178 transitions, 1992 flow [2024-06-27 21:50:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 178 transitions, 1935 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:32,186 INFO L231 Difference]: Finished difference. Result has 159 places, 147 transitions, 1656 flow [2024-06-27 21:50:32,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1656, PETRI_PLACES=159, PETRI_TRANSITIONS=147} [2024-06-27 21:50:32,187 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 110 predicate places. [2024-06-27 21:50:32,187 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 147 transitions, 1656 flow [2024-06-27 21:50:32,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:32,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:32,187 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 21:50:32,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:50:32,188 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:32,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -492763183, now seen corresponding path program 2 times [2024-06-27 21:50:32,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:32,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359674237] [2024-06-27 21:50:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:32,317 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 21:50:32,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:32,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359674237] [2024-06-27 21:50:32,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359674237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:32,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:32,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:32,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684136002] [2024-06-27 21:50:32,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:32,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:32,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:32,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:32,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 147 transitions, 1656 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:32,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:32,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:32,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:32,785 INFO L124 PetriNetUnfolderBase]: 1973/3786 cut-off events. [2024-06-27 21:50:32,785 INFO L125 PetriNetUnfolderBase]: For 20407/20487 co-relation queries the response was YES. [2024-06-27 21:50:32,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14255 conditions, 3786 events. 1973/3786 cut-off events. For 20407/20487 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 28904 event pairs, 607 based on Foata normal form. 19/3460 useless extension candidates. Maximal degree in co-relation 14185. Up to 2577 conditions per place. [2024-06-27 21:50:32,809 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 108 selfloop transitions, 43 changer transitions 0/171 dead transitions. [2024-06-27 21:50:32,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 171 transitions, 2036 flow [2024-06-27 21:50:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 21:50:32,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 21:50:32,810 INFO L175 Difference]: Start difference. First operand has 159 places, 147 transitions, 1656 flow. Second operand 6 states and 182 transitions. [2024-06-27 21:50:32,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 171 transitions, 2036 flow [2024-06-27 21:50:32,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 171 transitions, 2007 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:32,872 INFO L231 Difference]: Finished difference. Result has 163 places, 148 transitions, 1737 flow [2024-06-27 21:50:32,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1627, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1737, PETRI_PLACES=163, PETRI_TRANSITIONS=148} [2024-06-27 21:50:32,873 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 114 predicate places. [2024-06-27 21:50:32,873 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 148 transitions, 1737 flow [2024-06-27 21:50:32,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:32,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:32,873 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 21:50:32,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:50:32,874 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:32,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 323925531, now seen corresponding path program 2 times [2024-06-27 21:50:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:32,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010964880] [2024-06-27 21:50:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:33,005 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 21:50:33,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:33,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010964880] [2024-06-27 21:50:33,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010964880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:33,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:33,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:33,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451499545] [2024-06-27 21:50:33,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:33,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:33,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:33,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:33,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:33,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 148 transitions, 1737 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:33,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:33,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:33,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:33,582 INFO L124 PetriNetUnfolderBase]: 2008/3948 cut-off events. [2024-06-27 21:50:33,583 INFO L125 PetriNetUnfolderBase]: For 22001/22084 co-relation queries the response was YES. [2024-06-27 21:50:33,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14897 conditions, 3948 events. 2008/3948 cut-off events. For 22001/22084 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30670 event pairs, 535 based on Foata normal form. 20/3663 useless extension candidates. Maximal degree in co-relation 14825. Up to 2371 conditions per place. [2024-06-27 21:50:33,606 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 111 selfloop transitions, 49 changer transitions 0/180 dead transitions. [2024-06-27 21:50:33,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 180 transitions, 2212 flow [2024-06-27 21:50:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 21:50:33,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 21:50:33,607 INFO L175 Difference]: Start difference. First operand has 163 places, 148 transitions, 1737 flow. Second operand 7 states and 211 transitions. [2024-06-27 21:50:33,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 180 transitions, 2212 flow [2024-06-27 21:50:33,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 180 transitions, 2118 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:33,667 INFO L231 Difference]: Finished difference. Result has 167 places, 150 transitions, 1806 flow [2024-06-27 21:50:33,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1806, PETRI_PLACES=167, PETRI_TRANSITIONS=150} [2024-06-27 21:50:33,667 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2024-06-27 21:50:33,667 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 150 transitions, 1806 flow [2024-06-27 21:50:33,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:33,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:33,668 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 21:50:33,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:50:33,668 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:33,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash 323688381, now seen corresponding path program 3 times [2024-06-27 21:50:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895896796] [2024-06-27 21:50:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:33,797 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 21:50:33,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895896796] [2024-06-27 21:50:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895896796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:33,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:33,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:33,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481504412] [2024-06-27 21:50:33,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:33,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:33,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:33,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 150 transitions, 1806 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:33,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:33,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:33,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:34,330 INFO L124 PetriNetUnfolderBase]: 1992/3874 cut-off events. [2024-06-27 21:50:34,331 INFO L125 PetriNetUnfolderBase]: For 23895/23975 co-relation queries the response was YES. [2024-06-27 21:50:34,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14960 conditions, 3874 events. 1992/3874 cut-off events. For 23895/23975 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29962 event pairs, 532 based on Foata normal form. 20/3575 useless extension candidates. Maximal degree in co-relation 14886. Up to 2362 conditions per place. [2024-06-27 21:50:34,358 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 106 selfloop transitions, 49 changer transitions 0/175 dead transitions. [2024-06-27 21:50:34,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 175 transitions, 2186 flow [2024-06-27 21:50:34,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 21:50:34,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 21:50:34,361 INFO L175 Difference]: Start difference. First operand has 167 places, 150 transitions, 1806 flow. Second operand 6 states and 183 transitions. [2024-06-27 21:50:34,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 175 transitions, 2186 flow [2024-06-27 21:50:34,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 175 transitions, 2122 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:34,513 INFO L231 Difference]: Finished difference. Result has 169 places, 150 transitions, 1858 flow [2024-06-27 21:50:34,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1858, PETRI_PLACES=169, PETRI_TRANSITIONS=150} [2024-06-27 21:50:34,514 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-27 21:50:34,514 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 150 transitions, 1858 flow [2024-06-27 21:50:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:34,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:34,514 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 21:50:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:50:34,514 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:34,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash 323688195, now seen corresponding path program 3 times [2024-06-27 21:50:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:34,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046898132] [2024-06-27 21:50:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:34,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:34,644 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 21:50:34,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:34,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046898132] [2024-06-27 21:50:34,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046898132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:34,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:34,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:34,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398298596] [2024-06-27 21:50:34,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:34,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:34,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:34,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:34,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 150 transitions, 1858 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:34,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:34,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:34,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:35,124 INFO L124 PetriNetUnfolderBase]: 1996/3889 cut-off events. [2024-06-27 21:50:35,125 INFO L125 PetriNetUnfolderBase]: For 21664/21743 co-relation queries the response was YES. [2024-06-27 21:50:35,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14913 conditions, 3889 events. 1996/3889 cut-off events. For 21664/21743 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 30078 event pairs, 428 based on Foata normal form. 20/3603 useless extension candidates. Maximal degree in co-relation 14839. Up to 2362 conditions per place. [2024-06-27 21:50:35,154 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 104 selfloop transitions, 48 changer transitions 0/172 dead transitions. [2024-06-27 21:50:35,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 172 transitions, 2224 flow [2024-06-27 21:50:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 21:50:35,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7022222222222222 [2024-06-27 21:50:35,155 INFO L175 Difference]: Start difference. First operand has 169 places, 150 transitions, 1858 flow. Second operand 5 states and 158 transitions. [2024-06-27 21:50:35,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 172 transitions, 2224 flow [2024-06-27 21:50:35,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 172 transitions, 2120 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:35,213 INFO L231 Difference]: Finished difference. Result has 169 places, 150 transitions, 1876 flow [2024-06-27 21:50:35,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1876, PETRI_PLACES=169, PETRI_TRANSITIONS=150} [2024-06-27 21:50:35,214 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-27 21:50:35,214 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 150 transitions, 1876 flow [2024-06-27 21:50:35,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:35,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:35,214 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 21:50:35,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:50:35,214 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:35,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1255559441, now seen corresponding path program 4 times [2024-06-27 21:50:35,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:35,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445506898] [2024-06-27 21:50:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:35,316 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 21:50:35,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:35,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445506898] [2024-06-27 21:50:35,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445506898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:35,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:35,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:35,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143917484] [2024-06-27 21:50:35,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:35,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:35,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:35,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:35,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:35,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 150 transitions, 1876 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:35,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:35,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:35,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:35,902 INFO L124 PetriNetUnfolderBase]: 2108/4086 cut-off events. [2024-06-27 21:50:35,902 INFO L125 PetriNetUnfolderBase]: For 24233/24317 co-relation queries the response was YES. [2024-06-27 21:50:35,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15800 conditions, 4086 events. 2108/4086 cut-off events. For 24233/24317 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32045 event pairs, 415 based on Foata normal form. 22/3782 useless extension candidates. Maximal degree in co-relation 15725. Up to 1896 conditions per place. [2024-06-27 21:50:35,941 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 116 selfloop transitions, 50 changer transitions 0/186 dead transitions. [2024-06-27 21:50:35,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 186 transitions, 2422 flow [2024-06-27 21:50:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 21:50:35,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 21:50:35,943 INFO L175 Difference]: Start difference. First operand has 169 places, 150 transitions, 1876 flow. Second operand 7 states and 211 transitions. [2024-06-27 21:50:35,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 186 transitions, 2422 flow [2024-06-27 21:50:36,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 186 transitions, 2282 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:36,035 INFO L231 Difference]: Finished difference. Result has 170 places, 152 transitions, 1876 flow [2024-06-27 21:50:36,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1876, PETRI_PLACES=170, PETRI_TRANSITIONS=152} [2024-06-27 21:50:36,036 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 121 predicate places. [2024-06-27 21:50:36,036 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 152 transitions, 1876 flow [2024-06-27 21:50:36,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:36,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:36,036 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 21:50:36,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:50:36,037 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:36,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2071717455, now seen corresponding path program 5 times [2024-06-27 21:50:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:36,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676337086] [2024-06-27 21:50:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:36,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:36,145 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 21:50:36,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676337086] [2024-06-27 21:50:36,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676337086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:36,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:36,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158053827] [2024-06-27 21:50:36,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:36,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:36,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:36,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:36,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 152 transitions, 1876 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:36,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:36,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:36,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:36,721 INFO L124 PetriNetUnfolderBase]: 2176/4198 cut-off events. [2024-06-27 21:50:36,721 INFO L125 PetriNetUnfolderBase]: For 23346/23433 co-relation queries the response was YES. [2024-06-27 21:50:36,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16215 conditions, 4198 events. 2176/4198 cut-off events. For 23346/23433 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32856 event pairs, 452 based on Foata normal form. 23/3877 useless extension candidates. Maximal degree in co-relation 16141. Up to 1937 conditions per place. [2024-06-27 21:50:36,764 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 123 selfloop transitions, 45 changer transitions 0/188 dead transitions. [2024-06-27 21:50:36,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 188 transitions, 2410 flow [2024-06-27 21:50:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 21:50:36,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 21:50:36,766 INFO L175 Difference]: Start difference. First operand has 170 places, 152 transitions, 1876 flow. Second operand 7 states and 211 transitions. [2024-06-27 21:50:36,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 188 transitions, 2410 flow [2024-06-27 21:50:36,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 188 transitions, 2331 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:36,833 INFO L231 Difference]: Finished difference. Result has 174 places, 153 transitions, 1905 flow [2024-06-27 21:50:36,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1905, PETRI_PLACES=174, PETRI_TRANSITIONS=153} [2024-06-27 21:50:36,834 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 125 predicate places. [2024-06-27 21:50:36,834 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 153 transitions, 1905 flow [2024-06-27 21:50:36,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:36,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:36,834 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 21:50:36,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:50:36,835 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:36,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:36,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1250317217, now seen corresponding path program 4 times [2024-06-27 21:50:36,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:36,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143154003] [2024-06-27 21:50:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:36,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:36,941 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 21:50:36,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:36,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143154003] [2024-06-27 21:50:36,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143154003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:36,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:36,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:36,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673954146] [2024-06-27 21:50:36,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:36,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:36,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:36,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:36,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 153 transitions, 1905 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:36,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:36,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:36,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:37,558 INFO L124 PetriNetUnfolderBase]: 2313/4530 cut-off events. [2024-06-27 21:50:37,558 INFO L125 PetriNetUnfolderBase]: For 27825/27916 co-relation queries the response was YES. [2024-06-27 21:50:37,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17185 conditions, 4530 events. 2313/4530 cut-off events. For 27825/27916 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36219 event pairs, 594 based on Foata normal form. 24/4196 useless extension candidates. Maximal degree in co-relation 17110. Up to 2521 conditions per place. [2024-06-27 21:50:37,592 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 116 selfloop transitions, 67 changer transitions 0/203 dead transitions. [2024-06-27 21:50:37,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 203 transitions, 2482 flow [2024-06-27 21:50:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:50:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:50:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-06-27 21:50:37,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-27 21:50:37,594 INFO L175 Difference]: Start difference. First operand has 174 places, 153 transitions, 1905 flow. Second operand 10 states and 291 transitions. [2024-06-27 21:50:37,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 203 transitions, 2482 flow [2024-06-27 21:50:37,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 203 transitions, 2320 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:37,656 INFO L231 Difference]: Finished difference. Result has 178 places, 157 transitions, 1918 flow [2024-06-27 21:50:37,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1918, PETRI_PLACES=178, PETRI_TRANSITIONS=157} [2024-06-27 21:50:37,656 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 129 predicate places. [2024-06-27 21:50:37,657 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 157 transitions, 1918 flow [2024-06-27 21:50:37,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:37,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:37,657 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 21:50:37,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:50:37,658 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:37,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1250317031, now seen corresponding path program 6 times [2024-06-27 21:50:37,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:37,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900200858] [2024-06-27 21:50:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:37,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:37,794 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 21:50:37,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900200858] [2024-06-27 21:50:37,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900200858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:37,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:37,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867187073] [2024-06-27 21:50:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:37,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:37,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:37,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 157 transitions, 1918 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:37,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:38,426 INFO L124 PetriNetUnfolderBase]: 2389/4735 cut-off events. [2024-06-27 21:50:38,426 INFO L125 PetriNetUnfolderBase]: For 27502/27593 co-relation queries the response was YES. [2024-06-27 21:50:38,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17383 conditions, 4735 events. 2389/4735 cut-off events. For 27502/27593 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38119 event pairs, 814 based on Foata normal form. 24/4349 useless extension candidates. Maximal degree in co-relation 17308. Up to 3142 conditions per place. [2024-06-27 21:50:38,467 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 125 selfloop transitions, 43 changer transitions 0/188 dead transitions. [2024-06-27 21:50:38,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 188 transitions, 2349 flow [2024-06-27 21:50:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 21:50:38,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 21:50:38,469 INFO L175 Difference]: Start difference. First operand has 178 places, 157 transitions, 1918 flow. Second operand 7 states and 208 transitions. [2024-06-27 21:50:38,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 188 transitions, 2349 flow [2024-06-27 21:50:38,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 188 transitions, 2212 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:38,544 INFO L231 Difference]: Finished difference. Result has 179 places, 158 transitions, 1882 flow [2024-06-27 21:50:38,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=179, PETRI_TRANSITIONS=158} [2024-06-27 21:50:38,544 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 130 predicate places. [2024-06-27 21:50:38,545 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 158 transitions, 1882 flow [2024-06-27 21:50:38,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:38,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:38,545 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 21:50:38,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:50:38,545 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:38,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1255858343, now seen corresponding path program 1 times [2024-06-27 21:50:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:38,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554144257] [2024-06-27 21:50:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:38,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:38,678 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 21:50:38,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:38,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554144257] [2024-06-27 21:50:38,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554144257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:38,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:38,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:38,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050993078] [2024-06-27 21:50:38,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:38,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:38,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:38,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 158 transitions, 1882 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:38,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:38,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:38,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:39,235 INFO L124 PetriNetUnfolderBase]: 2465/4841 cut-off events. [2024-06-27 21:50:39,235 INFO L125 PetriNetUnfolderBase]: For 27912/28035 co-relation queries the response was YES. [2024-06-27 21:50:39,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17582 conditions, 4841 events. 2465/4841 cut-off events. For 27912/28035 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39455 event pairs, 806 based on Foata normal form. 29/4498 useless extension candidates. Maximal degree in co-relation 17506. Up to 2656 conditions per place. [2024-06-27 21:50:39,273 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 111 selfloop transitions, 70 changer transitions 0/201 dead transitions. [2024-06-27 21:50:39,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 201 transitions, 2424 flow [2024-06-27 21:50:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:50:39,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:50:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-06-27 21:50:39,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422222222222222 [2024-06-27 21:50:39,274 INFO L175 Difference]: Start difference. First operand has 179 places, 158 transitions, 1882 flow. Second operand 10 states and 289 transitions. [2024-06-27 21:50:39,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 201 transitions, 2424 flow [2024-06-27 21:50:39,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 201 transitions, 2334 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:39,364 INFO L231 Difference]: Finished difference. Result has 184 places, 160 transitions, 1956 flow [2024-06-27 21:50:39,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1956, PETRI_PLACES=184, PETRI_TRANSITIONS=160} [2024-06-27 21:50:39,364 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-27 21:50:39,364 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 160 transitions, 1956 flow [2024-06-27 21:50:39,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:39,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:39,365 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 21:50:39,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:50:39,367 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:39,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1255857971, now seen corresponding path program 7 times [2024-06-27 21:50:39,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:39,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547907561] [2024-06-27 21:50:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:39,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:39,474 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 21:50:39,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:39,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547907561] [2024-06-27 21:50:39,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547907561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:39,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:39,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641974490] [2024-06-27 21:50:39,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:39,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:39,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:39,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:39,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:39,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 160 transitions, 1956 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:39,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:39,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:39,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:40,055 INFO L124 PetriNetUnfolderBase]: 2535/4995 cut-off events. [2024-06-27 21:50:40,055 INFO L125 PetriNetUnfolderBase]: For 30990/31088 co-relation queries the response was YES. [2024-06-27 21:50:40,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18406 conditions, 4995 events. 2535/4995 cut-off events. For 30990/31088 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 40880 event pairs, 501 based on Foata normal form. 24/4661 useless extension candidates. Maximal degree in co-relation 18329. Up to 2326 conditions per place. [2024-06-27 21:50:40,093 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 115 selfloop transitions, 56 changer transitions 0/191 dead transitions. [2024-06-27 21:50:40,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 191 transitions, 2443 flow [2024-06-27 21:50:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 21:50:40,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 21:50:40,097 INFO L175 Difference]: Start difference. First operand has 184 places, 160 transitions, 1956 flow. Second operand 7 states and 208 transitions. [2024-06-27 21:50:40,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 191 transitions, 2443 flow [2024-06-27 21:50:40,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 191 transitions, 2340 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:50:40,207 INFO L231 Difference]: Finished difference. Result has 184 places, 161 transitions, 1980 flow [2024-06-27 21:50:40,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1980, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2024-06-27 21:50:40,208 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-27 21:50:40,208 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 1980 flow [2024-06-27 21:50:40,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:40,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:40,209 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 21:50:40,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:50:40,209 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:40,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1259582807, now seen corresponding path program 5 times [2024-06-27 21:50:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:40,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6931764] [2024-06-27 21:50:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:40,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:40,314 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 21:50:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6931764] [2024-06-27 21:50:40,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6931764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:40,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:40,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:40,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710427457] [2024-06-27 21:50:40,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:40,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:40,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:40,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:40,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:40,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 161 transitions, 1980 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:40,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:40,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:40,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:41,068 INFO L124 PetriNetUnfolderBase]: 2659/5298 cut-off events. [2024-06-27 21:50:41,068 INFO L125 PetriNetUnfolderBase]: For 34579/34681 co-relation queries the response was YES. [2024-06-27 21:50:41,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 5298 events. 2659/5298 cut-off events. For 34579/34681 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 43805 event pairs, 773 based on Foata normal form. 25/4911 useless extension candidates. Maximal degree in co-relation 19674. Up to 2919 conditions per place. [2024-06-27 21:50:41,117 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 119 selfloop transitions, 66 changer transitions 0/205 dead transitions. [2024-06-27 21:50:41,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 205 transitions, 2599 flow [2024-06-27 21:50:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:50:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:50:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-06-27 21:50:41,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6567901234567901 [2024-06-27 21:50:41,122 INFO L175 Difference]: Start difference. First operand has 184 places, 161 transitions, 1980 flow. Second operand 9 states and 266 transitions. [2024-06-27 21:50:41,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 205 transitions, 2599 flow [2024-06-27 21:50:41,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 205 transitions, 2509 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:41,227 INFO L231 Difference]: Finished difference. Result has 189 places, 165 transitions, 2060 flow [2024-06-27 21:50:41,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=189, PETRI_TRANSITIONS=165} [2024-06-27 21:50:41,228 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 140 predicate places. [2024-06-27 21:50:41,228 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 165 transitions, 2060 flow [2024-06-27 21:50:41,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:41,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:41,229 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 21:50:41,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:50:41,229 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:41,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:41,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1259577041, now seen corresponding path program 8 times [2024-06-27 21:50:41,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:41,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054097332] [2024-06-27 21:50:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:41,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:41,351 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 21:50:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054097332] [2024-06-27 21:50:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054097332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:41,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:41,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846653827] [2024-06-27 21:50:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:41,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:41,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 165 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:41,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:41,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:41,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:42,061 INFO L124 PetriNetUnfolderBase]: 2779/5422 cut-off events. [2024-06-27 21:50:42,061 INFO L125 PetriNetUnfolderBase]: For 38395/38500 co-relation queries the response was YES. [2024-06-27 21:50:42,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20467 conditions, 5422 events. 2779/5422 cut-off events. For 38395/38500 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44686 event pairs, 819 based on Foata normal form. 25/4963 useless extension candidates. Maximal degree in co-relation 20388. Up to 3472 conditions per place. [2024-06-27 21:50:42,106 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 127 selfloop transitions, 49 changer transitions 0/196 dead transitions. [2024-06-27 21:50:42,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 196 transitions, 2570 flow [2024-06-27 21:50:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 21:50:42,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 21:50:42,108 INFO L175 Difference]: Start difference. First operand has 189 places, 165 transitions, 2060 flow. Second operand 7 states and 209 transitions. [2024-06-27 21:50:42,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 196 transitions, 2570 flow [2024-06-27 21:50:42,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 196 transitions, 2511 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:42,199 INFO L231 Difference]: Finished difference. Result has 194 places, 167 transitions, 2141 flow [2024-06-27 21:50:42,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2001, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2141, PETRI_PLACES=194, PETRI_TRANSITIONS=167} [2024-06-27 21:50:42,199 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-27 21:50:42,199 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 167 transitions, 2141 flow [2024-06-27 21:50:42,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:42,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:42,200 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 21:50:42,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:50:42,200 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:42,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash 174917089, now seen corresponding path program 2 times [2024-06-27 21:50:42,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:42,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210906958] [2024-06-27 21:50:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:42,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:42,314 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 21:50:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:42,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210906958] [2024-06-27 21:50:42,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210906958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:42,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:42,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:42,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41859059] [2024-06-27 21:50:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:42,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:42,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 167 transitions, 2141 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:42,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:42,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:42,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:43,079 INFO L124 PetriNetUnfolderBase]: 2894/5649 cut-off events. [2024-06-27 21:50:43,079 INFO L125 PetriNetUnfolderBase]: For 44012/44144 co-relation queries the response was YES. [2024-06-27 21:50:43,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21485 conditions, 5649 events. 2894/5649 cut-off events. For 44012/44144 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 47153 event pairs, 1106 based on Foata normal form. 31/5170 useless extension candidates. Maximal degree in co-relation 21404. Up to 3709 conditions per place. [2024-06-27 21:50:43,129 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 125 selfloop transitions, 61 changer transitions 0/206 dead transitions. [2024-06-27 21:50:43,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 206 transitions, 2710 flow [2024-06-27 21:50:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:50:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:50:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-27 21:50:43,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 21:50:43,130 INFO L175 Difference]: Start difference. First operand has 194 places, 167 transitions, 2141 flow. Second operand 10 states and 285 transitions. [2024-06-27 21:50:43,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 206 transitions, 2710 flow [2024-06-27 21:50:43,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 206 transitions, 2619 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:43,239 INFO L231 Difference]: Finished difference. Result has 201 places, 171 transitions, 2241 flow [2024-06-27 21:50:43,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2241, PETRI_PLACES=201, PETRI_TRANSITIONS=171} [2024-06-27 21:50:43,240 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 152 predicate places. [2024-06-27 21:50:43,240 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 171 transitions, 2241 flow [2024-06-27 21:50:43,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:43,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:43,240 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 21:50:43,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:50:43,241 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:43,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash 174911137, now seen corresponding path program 9 times [2024-06-27 21:50:43,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:43,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30921555] [2024-06-27 21:50:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:43,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:43,355 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 21:50:43,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30921555] [2024-06-27 21:50:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30921555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:43,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:43,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388483358] [2024-06-27 21:50:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:43,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:43,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:43,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:43,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 171 transitions, 2241 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:43,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:44,050 INFO L124 PetriNetUnfolderBase]: 2911/5640 cut-off events. [2024-06-27 21:50:44,050 INFO L125 PetriNetUnfolderBase]: For 43896/44003 co-relation queries the response was YES. [2024-06-27 21:50:44,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21584 conditions, 5640 events. 2911/5640 cut-off events. For 43896/44003 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46698 event pairs, 853 based on Foata normal form. 26/5151 useless extension candidates. Maximal degree in co-relation 21501. Up to 3638 conditions per place. [2024-06-27 21:50:44,096 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 135 selfloop transitions, 53 changer transitions 0/208 dead transitions. [2024-06-27 21:50:44,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 208 transitions, 2723 flow [2024-06-27 21:50:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:50:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:50:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-06-27 21:50:44,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-27 21:50:44,097 INFO L175 Difference]: Start difference. First operand has 201 places, 171 transitions, 2241 flow. Second operand 9 states and 260 transitions. [2024-06-27 21:50:44,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 208 transitions, 2723 flow [2024-06-27 21:50:44,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 208 transitions, 2643 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:44,214 INFO L231 Difference]: Finished difference. Result has 204 places, 171 transitions, 2271 flow [2024-06-27 21:50:44,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2271, PETRI_PLACES=204, PETRI_TRANSITIONS=171} [2024-06-27 21:50:44,215 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 155 predicate places. [2024-06-27 21:50:44,215 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 171 transitions, 2271 flow [2024-06-27 21:50:44,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:44,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:44,215 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 21:50:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:50:44,216 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:44,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash 174922669, now seen corresponding path program 3 times [2024-06-27 21:50:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744502653] [2024-06-27 21:50:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:44,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:44,334 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 21:50:44,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:44,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744502653] [2024-06-27 21:50:44,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744502653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:44,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:44,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:44,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324633593] [2024-06-27 21:50:44,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:44,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:44,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:44,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:44,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:44,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:44,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 171 transitions, 2271 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:44,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:44,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:44,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:45,073 INFO L124 PetriNetUnfolderBase]: 2860/5572 cut-off events. [2024-06-27 21:50:45,073 INFO L125 PetriNetUnfolderBase]: For 42425/42550 co-relation queries the response was YES. [2024-06-27 21:50:45,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21580 conditions, 5572 events. 2860/5572 cut-off events. For 42425/42550 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 46295 event pairs, 1115 based on Foata normal form. 29/5093 useless extension candidates. Maximal degree in co-relation 21495. Up to 3679 conditions per place. [2024-06-27 21:50:45,120 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 128 selfloop transitions, 61 changer transitions 0/209 dead transitions. [2024-06-27 21:50:45,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 209 transitions, 2755 flow [2024-06-27 21:50:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:50:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:50:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 310 transitions. [2024-06-27 21:50:45,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2024-06-27 21:50:45,122 INFO L175 Difference]: Start difference. First operand has 204 places, 171 transitions, 2271 flow. Second operand 11 states and 310 transitions. [2024-06-27 21:50:45,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 209 transitions, 2755 flow [2024-06-27 21:50:45,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 209 transitions, 2620 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:50:45,240 INFO L231 Difference]: Finished difference. Result has 207 places, 171 transitions, 2265 flow [2024-06-27 21:50:45,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2265, PETRI_PLACES=207, PETRI_TRANSITIONS=171} [2024-06-27 21:50:45,240 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2024-06-27 21:50:45,241 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 171 transitions, 2265 flow [2024-06-27 21:50:45,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:45,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:45,241 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 21:50:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:50:45,241 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:45,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash 174911323, now seen corresponding path program 6 times [2024-06-27 21:50:45,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:45,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312968996] [2024-06-27 21:50:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:45,349 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 21:50:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312968996] [2024-06-27 21:50:45,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312968996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:45,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:45,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:45,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256457529] [2024-06-27 21:50:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:45,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:45,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 171 transitions, 2265 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:45,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:45,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:45,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:46,056 INFO L124 PetriNetUnfolderBase]: 2881/5742 cut-off events. [2024-06-27 21:50:46,056 INFO L125 PetriNetUnfolderBase]: For 42942/43045 co-relation queries the response was YES. [2024-06-27 21:50:46,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21692 conditions, 5742 events. 2881/5742 cut-off events. For 42942/43045 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 48082 event pairs, 841 based on Foata normal form. 26/5317 useless extension candidates. Maximal degree in co-relation 21606. Up to 3245 conditions per place. [2024-06-27 21:50:46,105 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 131 selfloop transitions, 68 changer transitions 0/219 dead transitions. [2024-06-27 21:50:46,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 219 transitions, 2861 flow [2024-06-27 21:50:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:50:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:50:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 317 transitions. [2024-06-27 21:50:46,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6404040404040404 [2024-06-27 21:50:46,106 INFO L175 Difference]: Start difference. First operand has 207 places, 171 transitions, 2265 flow. Second operand 11 states and 317 transitions. [2024-06-27 21:50:46,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 219 transitions, 2861 flow [2024-06-27 21:50:46,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 219 transitions, 2735 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 21:50:46,222 INFO L231 Difference]: Finished difference. Result has 209 places, 171 transitions, 2279 flow [2024-06-27 21:50:46,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2279, PETRI_PLACES=209, PETRI_TRANSITIONS=171} [2024-06-27 21:50:46,223 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 160 predicate places. [2024-06-27 21:50:46,223 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 171 transitions, 2279 flow [2024-06-27 21:50:46,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:46,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:46,223 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 21:50:46,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:50:46,224 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:46,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1163335205, now seen corresponding path program 7 times [2024-06-27 21:50:46,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672861959] [2024-06-27 21:50:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:46,347 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 21:50:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672861959] [2024-06-27 21:50:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672861959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:46,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:46,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:46,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730194641] [2024-06-27 21:50:46,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:46,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:46,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 171 transitions, 2279 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:46,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:46,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:46,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:46,989 INFO L124 PetriNetUnfolderBase]: 2921/5729 cut-off events. [2024-06-27 21:50:46,989 INFO L125 PetriNetUnfolderBase]: For 48278/48377 co-relation queries the response was YES. [2024-06-27 21:50:47,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22037 conditions, 5729 events. 2921/5729 cut-off events. For 48278/48377 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 48149 event pairs, 838 based on Foata normal form. 35/5276 useless extension candidates. Maximal degree in co-relation 21950. Up to 3233 conditions per place. [2024-06-27 21:50:47,036 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 120 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-27 21:50:47,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 195 transitions, 2768 flow [2024-06-27 21:50:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 21:50:47,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 21:50:47,041 INFO L175 Difference]: Start difference. First operand has 209 places, 171 transitions, 2279 flow. Second operand 6 states and 179 transitions. [2024-06-27 21:50:47,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 195 transitions, 2768 flow [2024-06-27 21:50:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 195 transitions, 2617 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:50:47,148 INFO L231 Difference]: Finished difference. Result has 205 places, 172 transitions, 2253 flow [2024-06-27 21:50:47,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2253, PETRI_PLACES=205, PETRI_TRANSITIONS=172} [2024-06-27 21:50:47,149 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 156 predicate places. [2024-06-27 21:50:47,149 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 172 transitions, 2253 flow [2024-06-27 21:50:47,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:47,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:47,149 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 21:50:47,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:50:47,149 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:47,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1163335019, now seen corresponding path program 4 times [2024-06-27 21:50:47,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:47,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503360711] [2024-06-27 21:50:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:47,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:47,260 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 21:50:47,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503360711] [2024-06-27 21:50:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503360711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:47,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:47,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240511015] [2024-06-27 21:50:47,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:47,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:47,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:47,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:47,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 172 transitions, 2253 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:47,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:47,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:47,949 INFO L124 PetriNetUnfolderBase]: 3097/6127 cut-off events. [2024-06-27 21:50:47,949 INFO L125 PetriNetUnfolderBase]: For 50056/50199 co-relation queries the response was YES. [2024-06-27 21:50:47,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23365 conditions, 6127 events. 3097/6127 cut-off events. For 50056/50199 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 52160 event pairs, 1019 based on Foata normal form. 40/5681 useless extension candidates. Maximal degree in co-relation 23277. Up to 3594 conditions per place. [2024-06-27 21:50:48,001 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 125 selfloop transitions, 66 changer transitions 0/211 dead transitions. [2024-06-27 21:50:48,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 211 transitions, 2863 flow [2024-06-27 21:50:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 21:50:48,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:50:48,002 INFO L175 Difference]: Start difference. First operand has 205 places, 172 transitions, 2253 flow. Second operand 8 states and 236 transitions. [2024-06-27 21:50:48,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 211 transitions, 2863 flow [2024-06-27 21:50:48,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 211 transitions, 2783 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:48,158 INFO L231 Difference]: Finished difference. Result has 211 places, 178 transitions, 2411 flow [2024-06-27 21:50:48,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2411, PETRI_PLACES=211, PETRI_TRANSITIONS=178} [2024-06-27 21:50:48,159 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 162 predicate places. [2024-06-27 21:50:48,159 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 178 transitions, 2411 flow [2024-06-27 21:50:48,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:48,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:48,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:48,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:50:48,160 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:48,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:48,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1725853869, now seen corresponding path program 5 times [2024-06-27 21:50:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:48,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377138075] [2024-06-27 21:50:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:48,277 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 21:50:48,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:48,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377138075] [2024-06-27 21:50:48,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377138075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:48,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:48,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733771276] [2024-06-27 21:50:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:48,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:48,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:48,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:48,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 178 transitions, 2411 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:48,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:48,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:48,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:49,015 INFO L124 PetriNetUnfolderBase]: 3090/6042 cut-off events. [2024-06-27 21:50:49,016 INFO L125 PetriNetUnfolderBase]: For 53089/53220 co-relation queries the response was YES. [2024-06-27 21:50:49,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23799 conditions, 6042 events. 3090/6042 cut-off events. For 53089/53220 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 50926 event pairs, 1116 based on Foata normal form. 32/5554 useless extension candidates. Maximal degree in co-relation 23709. Up to 3610 conditions per place. [2024-06-27 21:50:49,068 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 130 selfloop transitions, 71 changer transitions 0/221 dead transitions. [2024-06-27 21:50:49,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 221 transitions, 3007 flow [2024-06-27 21:50:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:50:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:50:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-06-27 21:50:49,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-27 21:50:49,070 INFO L175 Difference]: Start difference. First operand has 211 places, 178 transitions, 2411 flow. Second operand 10 states and 291 transitions. [2024-06-27 21:50:49,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 221 transitions, 3007 flow [2024-06-27 21:50:49,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 221 transitions, 2939 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:49,205 INFO L231 Difference]: Finished difference. Result has 217 places, 179 transitions, 2509 flow [2024-06-27 21:50:49,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2509, PETRI_PLACES=217, PETRI_TRANSITIONS=179} [2024-06-27 21:50:49,206 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 168 predicate places. [2024-06-27 21:50:49,206 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 179 transitions, 2509 flow [2024-06-27 21:50:49,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:49,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:49,207 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 21:50:49,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:50:49,207 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:49,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1170698201, now seen corresponding path program 10 times [2024-06-27 21:50:49,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:49,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020086053] [2024-06-27 21:50:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:49,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:49,307 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 21:50:49,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020086053] [2024-06-27 21:50:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020086053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:49,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:49,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:49,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949070001] [2024-06-27 21:50:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:49,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:49,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:49,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 179 transitions, 2509 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:49,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:49,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:49,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:50,017 INFO L124 PetriNetUnfolderBase]: 3136/6179 cut-off events. [2024-06-27 21:50:50,018 INFO L125 PetriNetUnfolderBase]: For 51761/51865 co-relation queries the response was YES. [2024-06-27 21:50:50,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24467 conditions, 6179 events. 3136/6179 cut-off events. For 51761/51865 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 52531 event pairs, 621 based on Foata normal form. 27/5745 useless extension candidates. Maximal degree in co-relation 24376. Up to 3344 conditions per place. [2024-06-27 21:50:50,070 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 134 selfloop transitions, 68 changer transitions 0/222 dead transitions. [2024-06-27 21:50:50,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 222 transitions, 3101 flow [2024-06-27 21:50:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 21:50:50,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-27 21:50:50,071 INFO L175 Difference]: Start difference. First operand has 217 places, 179 transitions, 2509 flow. Second operand 8 states and 245 transitions. [2024-06-27 21:50:50,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 222 transitions, 3101 flow [2024-06-27 21:50:50,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 222 transitions, 2934 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 21:50:50,219 INFO L231 Difference]: Finished difference. Result has 215 places, 179 transitions, 2492 flow [2024-06-27 21:50:50,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2492, PETRI_PLACES=215, PETRI_TRANSITIONS=179} [2024-06-27 21:50:50,220 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 166 predicate places. [2024-06-27 21:50:50,220 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 179 transitions, 2492 flow [2024-06-27 21:50:50,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:50,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:50,221 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 21:50:50,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:50:50,221 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:50,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1170698015, now seen corresponding path program 8 times [2024-06-27 21:50:50,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:50,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456780858] [2024-06-27 21:50:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:50,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:50,323 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 21:50:50,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:50,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456780858] [2024-06-27 21:50:50,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456780858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:50,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:50,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528080220] [2024-06-27 21:50:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:50,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:50,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:50,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:50,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 179 transitions, 2492 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:50,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:50,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:50,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:51,041 INFO L124 PetriNetUnfolderBase]: 3201/6329 cut-off events. [2024-06-27 21:50:51,041 INFO L125 PetriNetUnfolderBase]: For 50074/50178 co-relation queries the response was YES. [2024-06-27 21:50:51,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24684 conditions, 6329 events. 3201/6329 cut-off events. For 50074/50178 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 53713 event pairs, 985 based on Foata normal form. 27/5838 useless extension candidates. Maximal degree in co-relation 24594. Up to 3599 conditions per place. [2024-06-27 21:50:51,095 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 130 selfloop transitions, 72 changer transitions 0/222 dead transitions. [2024-06-27 21:50:51,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 222 transitions, 3090 flow [2024-06-27 21:50:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:50:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:50:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-06-27 21:50:51,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2024-06-27 21:50:51,097 INFO L175 Difference]: Start difference. First operand has 215 places, 179 transitions, 2492 flow. Second operand 9 states and 265 transitions. [2024-06-27 21:50:51,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 222 transitions, 3090 flow [2024-06-27 21:50:51,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 222 transitions, 2901 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 21:50:51,230 INFO L231 Difference]: Finished difference. Result has 214 places, 180 transitions, 2471 flow [2024-06-27 21:50:51,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2471, PETRI_PLACES=214, PETRI_TRANSITIONS=180} [2024-06-27 21:50:51,231 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 165 predicate places. [2024-06-27 21:50:51,231 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 180 transitions, 2471 flow [2024-06-27 21:50:51,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:51,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:51,231 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 21:50:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:50:51,231 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:51,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1170692621, now seen corresponding path program 11 times [2024-06-27 21:50:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733708361] [2024-06-27 21:50:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:51,342 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 21:50:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:51,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733708361] [2024-06-27 21:50:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733708361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:51,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026132260] [2024-06-27 21:50:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:51,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:51,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 180 transitions, 2471 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:51,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:51,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:51,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:52,183 INFO L124 PetriNetUnfolderBase]: 3185/6221 cut-off events. [2024-06-27 21:50:52,183 INFO L125 PetriNetUnfolderBase]: For 42375/42478 co-relation queries the response was YES. [2024-06-27 21:50:52,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24173 conditions, 6221 events. 3185/6221 cut-off events. For 42375/42478 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52700 event pairs, 632 based on Foata normal form. 27/5767 useless extension candidates. Maximal degree in co-relation 24084. Up to 3418 conditions per place. [2024-06-27 21:50:52,223 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 125 selfloop transitions, 62 changer transitions 0/207 dead transitions. [2024-06-27 21:50:52,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 2921 flow [2024-06-27 21:50:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 21:50:52,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 21:50:52,224 INFO L175 Difference]: Start difference. First operand has 214 places, 180 transitions, 2471 flow. Second operand 6 states and 184 transitions. [2024-06-27 21:50:52,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 2921 flow [2024-06-27 21:50:52,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 207 transitions, 2769 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 21:50:52,351 INFO L231 Difference]: Finished difference. Result has 211 places, 180 transitions, 2454 flow [2024-06-27 21:50:52,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2454, PETRI_PLACES=211, PETRI_TRANSITIONS=180} [2024-06-27 21:50:52,352 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 162 predicate places. [2024-06-27 21:50:52,352 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 180 transitions, 2454 flow [2024-06-27 21:50:52,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:52,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:52,352 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 21:50:52,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:50:52,353 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:52,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 48355471, now seen corresponding path program 6 times [2024-06-27 21:50:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:52,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395172527] [2024-06-27 21:50:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:52,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:52,458 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 21:50:52,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:52,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395172527] [2024-06-27 21:50:52,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395172527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:52,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:52,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:52,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28111454] [2024-06-27 21:50:52,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:52,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:52,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:52,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 180 transitions, 2454 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:52,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:52,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:52,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:53,194 INFO L124 PetriNetUnfolderBase]: 3127/6142 cut-off events. [2024-06-27 21:50:53,194 INFO L125 PetriNetUnfolderBase]: For 39445/39572 co-relation queries the response was YES. [2024-06-27 21:50:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23657 conditions, 6142 events. 3127/6142 cut-off events. For 39445/39572 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 52105 event pairs, 1111 based on Foata normal form. 32/5658 useless extension candidates. Maximal degree in co-relation 23570. Up to 3650 conditions per place. [2024-06-27 21:50:53,247 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 121 selfloop transitions, 71 changer transitions 0/212 dead transitions. [2024-06-27 21:50:53,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 212 transitions, 2926 flow [2024-06-27 21:50:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 21:50:53,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:50:53,248 INFO L175 Difference]: Start difference. First operand has 211 places, 180 transitions, 2454 flow. Second operand 8 states and 236 transitions. [2024-06-27 21:50:53,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 212 transitions, 2926 flow [2024-06-27 21:50:53,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 212 transitions, 2793 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:53,388 INFO L231 Difference]: Finished difference. Result has 213 places, 180 transitions, 2473 flow [2024-06-27 21:50:53,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2473, PETRI_PLACES=213, PETRI_TRANSITIONS=180} [2024-06-27 21:50:53,389 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 164 predicate places. [2024-06-27 21:50:53,389 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 180 transitions, 2473 flow [2024-06-27 21:50:53,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:53,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:53,389 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 21:50:53,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:50:53,390 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:53,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 48360865, now seen corresponding path program 9 times [2024-06-27 21:50:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:53,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37704206] [2024-06-27 21:50:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:53,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:53,490 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 21:50:53,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:53,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37704206] [2024-06-27 21:50:53,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37704206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:53,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:53,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:53,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908080489] [2024-06-27 21:50:53,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:53,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:53,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:53,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 180 transitions, 2473 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:53,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:53,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:53,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:54,231 INFO L124 PetriNetUnfolderBase]: 3150/6273 cut-off events. [2024-06-27 21:50:54,232 INFO L125 PetriNetUnfolderBase]: For 36359/36460 co-relation queries the response was YES. [2024-06-27 21:50:54,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23760 conditions, 6273 events. 3150/6273 cut-off events. For 36359/36460 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 53373 event pairs, 923 based on Foata normal form. 27/5808 useless extension candidates. Maximal degree in co-relation 23673. Up to 3549 conditions per place. [2024-06-27 21:50:54,279 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 129 selfloop transitions, 65 changer transitions 0/214 dead transitions. [2024-06-27 21:50:54,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 214 transitions, 2957 flow [2024-06-27 21:50:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 21:50:54,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:50:54,281 INFO L175 Difference]: Start difference. First operand has 213 places, 180 transitions, 2473 flow. Second operand 8 states and 236 transitions. [2024-06-27 21:50:54,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 214 transitions, 2957 flow [2024-06-27 21:50:54,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 214 transitions, 2799 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:50:54,384 INFO L231 Difference]: Finished difference. Result has 212 places, 180 transitions, 2453 flow [2024-06-27 21:50:54,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2453, PETRI_PLACES=212, PETRI_TRANSITIONS=180} [2024-06-27 21:50:54,384 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 163 predicate places. [2024-06-27 21:50:54,384 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 180 transitions, 2453 flow [2024-06-27 21:50:54,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:54,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:54,385 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 21:50:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:50:54,385 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:54,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1325367813, now seen corresponding path program 7 times [2024-06-27 21:50:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:54,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609965850] [2024-06-27 21:50:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:54,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:54,468 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 21:50:54,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609965850] [2024-06-27 21:50:54,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609965850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:54,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:54,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:54,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995224791] [2024-06-27 21:50:54,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:54,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:54,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:54,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:54,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 180 transitions, 2453 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:54,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:54,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:54,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:55,137 INFO L124 PetriNetUnfolderBase]: 3188/6249 cut-off events. [2024-06-27 21:50:55,137 INFO L125 PetriNetUnfolderBase]: For 36396/36523 co-relation queries the response was YES. [2024-06-27 21:50:55,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23728 conditions, 6249 events. 3188/6249 cut-off events. For 36396/36523 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 53112 event pairs, 1168 based on Foata normal form. 33/5750 useless extension candidates. Maximal degree in co-relation 23642. Up to 2991 conditions per place. [2024-06-27 21:50:55,189 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 131 selfloop transitions, 70 changer transitions 0/221 dead transitions. [2024-06-27 21:50:55,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 221 transitions, 3033 flow [2024-06-27 21:50:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 21:50:55,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:50:55,195 INFO L175 Difference]: Start difference. First operand has 212 places, 180 transitions, 2453 flow. Second operand 8 states and 240 transitions. [2024-06-27 21:50:55,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 221 transitions, 3033 flow [2024-06-27 21:50:55,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 221 transitions, 2861 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 21:50:55,296 INFO L231 Difference]: Finished difference. Result has 211 places, 181 transitions, 2437 flow [2024-06-27 21:50:55,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2437, PETRI_PLACES=211, PETRI_TRANSITIONS=181} [2024-06-27 21:50:55,297 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 162 predicate places. [2024-06-27 21:50:55,297 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 181 transitions, 2437 flow [2024-06-27 21:50:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:55,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:55,297 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 21:50:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:50:55,297 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:55,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1922908351, now seen corresponding path program 8 times [2024-06-27 21:50:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015118217] [2024-06-27 21:50:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:55,391 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 21:50:55,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015118217] [2024-06-27 21:50:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015118217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:55,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:55,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:55,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395764105] [2024-06-27 21:50:55,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:55,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:55,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:55,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 181 transitions, 2437 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:55,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:55,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:55,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:56,226 INFO L124 PetriNetUnfolderBase]: 3357/6491 cut-off events. [2024-06-27 21:50:56,226 INFO L125 PetriNetUnfolderBase]: For 37997/38132 co-relation queries the response was YES. [2024-06-27 21:50:56,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25047 conditions, 6491 events. 3357/6491 cut-off events. For 37997/38132 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 55157 event pairs, 1359 based on Foata normal form. 36/5910 useless extension candidates. Maximal degree in co-relation 24961. Up to 4052 conditions per place. [2024-06-27 21:50:56,284 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 140 selfloop transitions, 62 changer transitions 0/222 dead transitions. [2024-06-27 21:50:56,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 222 transitions, 3093 flow [2024-06-27 21:50:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 21:50:56,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:50:56,287 INFO L175 Difference]: Start difference. First operand has 211 places, 181 transitions, 2437 flow. Second operand 8 states and 240 transitions. [2024-06-27 21:50:56,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 222 transitions, 3093 flow [2024-06-27 21:50:56,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 222 transitions, 2975 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:56,405 INFO L231 Difference]: Finished difference. Result has 215 places, 184 transitions, 2491 flow [2024-06-27 21:50:56,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2491, PETRI_PLACES=215, PETRI_TRANSITIONS=184} [2024-06-27 21:50:56,406 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 166 predicate places. [2024-06-27 21:50:56,406 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 184 transitions, 2491 flow [2024-06-27 21:50:56,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:56,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:56,406 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 21:50:56,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:50:56,406 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:56,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:56,407 INFO L85 PathProgramCache]: Analyzing trace with hash 604011077, now seen corresponding path program 9 times [2024-06-27 21:50:56,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:56,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785022688] [2024-06-27 21:50:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:56,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:56,528 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 21:50:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785022688] [2024-06-27 21:50:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785022688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:56,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:56,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:56,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110779415] [2024-06-27 21:50:56,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:56,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:56,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:56,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:56,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 184 transitions, 2491 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:56,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:56,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:56,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:57,293 INFO L124 PetriNetUnfolderBase]: 3378/6492 cut-off events. [2024-06-27 21:50:57,293 INFO L125 PetriNetUnfolderBase]: For 37977/38111 co-relation queries the response was YES. [2024-06-27 21:50:57,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24784 conditions, 6492 events. 3378/6492 cut-off events. For 37977/38111 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 55085 event pairs, 1497 based on Foata normal form. 36/5861 useless extension candidates. Maximal degree in co-relation 24696. Up to 4716 conditions per place. [2024-06-27 21:50:57,348 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 149 selfloop transitions, 40 changer transitions 0/209 dead transitions. [2024-06-27 21:50:57,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 209 transitions, 2937 flow [2024-06-27 21:50:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 21:50:57,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 21:50:57,349 INFO L175 Difference]: Start difference. First operand has 215 places, 184 transitions, 2491 flow. Second operand 8 states and 227 transitions. [2024-06-27 21:50:57,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 209 transitions, 2937 flow [2024-06-27 21:50:57,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 209 transitions, 2868 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:57,467 INFO L231 Difference]: Finished difference. Result has 220 places, 184 transitions, 2506 flow [2024-06-27 21:50:57,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2506, PETRI_PLACES=220, PETRI_TRANSITIONS=184} [2024-06-27 21:50:57,468 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 171 predicate places. [2024-06-27 21:50:57,468 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 184 transitions, 2506 flow [2024-06-27 21:50:57,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:57,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:57,468 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 21:50:57,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:50:57,469 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:57,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash -292727891, now seen corresponding path program 10 times [2024-06-27 21:50:57,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:57,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068721765] [2024-06-27 21:50:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:57,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:57,564 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 21:50:57,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068721765] [2024-06-27 21:50:57,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068721765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:57,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:57,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:57,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195900752] [2024-06-27 21:50:57,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:57,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:57,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:57,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:57,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 184 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:57,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:57,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:57,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:58,392 INFO L124 PetriNetUnfolderBase]: 3384/6582 cut-off events. [2024-06-27 21:50:58,392 INFO L125 PetriNetUnfolderBase]: For 38467/38603 co-relation queries the response was YES. [2024-06-27 21:50:58,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25075 conditions, 6582 events. 3384/6582 cut-off events. For 38467/38603 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 56421 event pairs, 1307 based on Foata normal form. 37/6000 useless extension candidates. Maximal degree in co-relation 24985. Up to 4067 conditions per place. [2024-06-27 21:50:58,441 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 141 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-27 21:50:58,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 227 transitions, 3109 flow [2024-06-27 21:50:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:50:58,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:50:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-06-27 21:50:58,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422222222222222 [2024-06-27 21:50:58,442 INFO L175 Difference]: Start difference. First operand has 220 places, 184 transitions, 2506 flow. Second operand 10 states and 289 transitions. [2024-06-27 21:50:58,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 227 transitions, 3109 flow [2024-06-27 21:50:58,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 227 transitions, 3002 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:50:58,568 INFO L231 Difference]: Finished difference. Result has 222 places, 185 transitions, 2546 flow [2024-06-27 21:50:58,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2546, PETRI_PLACES=222, PETRI_TRANSITIONS=185} [2024-06-27 21:50:58,568 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 173 predicate places. [2024-06-27 21:50:58,568 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 185 transitions, 2546 flow [2024-06-27 21:50:58,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:58,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:58,569 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 21:50:58,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:50:58,569 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:58,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash 609552017, now seen corresponding path program 11 times [2024-06-27 21:50:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:58,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236132891] [2024-06-27 21:50:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:58,672 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 21:50:58,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:58,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236132891] [2024-06-27 21:50:58,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236132891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:58,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:58,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:58,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571869618] [2024-06-27 21:50:58,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:58,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:58,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:58,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:58,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:58,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:58,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 185 transitions, 2546 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:58,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:58,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:58,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:59,398 INFO L124 PetriNetUnfolderBase]: 3391/6583 cut-off events. [2024-06-27 21:50:59,399 INFO L125 PetriNetUnfolderBase]: For 37544/37679 co-relation queries the response was YES. [2024-06-27 21:50:59,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25209 conditions, 6583 events. 3391/6583 cut-off events. For 37544/37679 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 56455 event pairs, 1263 based on Foata normal form. 37/6034 useless extension candidates. Maximal degree in co-relation 25119. Up to 4064 conditions per place. [2024-06-27 21:50:59,457 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 142 selfloop transitions, 68 changer transitions 0/230 dead transitions. [2024-06-27 21:50:59,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 230 transitions, 3094 flow [2024-06-27 21:50:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:50:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:50:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 313 transitions. [2024-06-27 21:50:59,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323232323232323 [2024-06-27 21:50:59,458 INFO L175 Difference]: Start difference. First operand has 222 places, 185 transitions, 2546 flow. Second operand 11 states and 313 transitions. [2024-06-27 21:50:59,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 230 transitions, 3094 flow [2024-06-27 21:50:59,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 230 transitions, 2946 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:50:59,606 INFO L231 Difference]: Finished difference. Result has 225 places, 185 transitions, 2538 flow [2024-06-27 21:50:59,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2538, PETRI_PLACES=225, PETRI_TRANSITIONS=185} [2024-06-27 21:50:59,607 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 176 predicate places. [2024-06-27 21:50:59,607 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 185 transitions, 2538 flow [2024-06-27 21:50:59,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:59,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:59,607 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 21:50:59,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:50:59,608 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:50:59,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 609551831, now seen corresponding path program 10 times [2024-06-27 21:50:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:59,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926754811] [2024-06-27 21:50:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:59,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:59,693 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 21:50:59,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:59,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926754811] [2024-06-27 21:50:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926754811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:59,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:50:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075474973] [2024-06-27 21:50:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:50:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:50:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:50:59,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:50:59,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 185 transitions, 2538 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:50:59,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:59,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:50:59,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:00,523 INFO L124 PetriNetUnfolderBase]: 3457/6783 cut-off events. [2024-06-27 21:51:00,524 INFO L125 PetriNetUnfolderBase]: For 40970/41082 co-relation queries the response was YES. [2024-06-27 21:51:00,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25598 conditions, 6783 events. 3457/6783 cut-off events. For 40970/41082 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 58622 event pairs, 1139 based on Foata normal form. 33/6222 useless extension candidates. Maximal degree in co-relation 25507. Up to 3660 conditions per place. [2024-06-27 21:51:00,569 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 137 selfloop transitions, 64 changer transitions 0/221 dead transitions. [2024-06-27 21:51:00,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 221 transitions, 3112 flow [2024-06-27 21:51:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:51:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:51:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 21:51:00,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 21:51:00,570 INFO L175 Difference]: Start difference. First operand has 225 places, 185 transitions, 2538 flow. Second operand 8 states and 235 transitions. [2024-06-27 21:51:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 221 transitions, 3112 flow [2024-06-27 21:51:00,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 221 transitions, 2969 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:00,691 INFO L231 Difference]: Finished difference. Result has 223 places, 186 transitions, 2537 flow [2024-06-27 21:51:00,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2537, PETRI_PLACES=223, PETRI_TRANSITIONS=186} [2024-06-27 21:51:00,691 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 174 predicate places. [2024-06-27 21:51:00,691 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 186 transitions, 2537 flow [2024-06-27 21:51:00,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:00,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:00,692 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 21:51:00,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:51:00,692 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:00,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1577074919, now seen corresponding path program 12 times [2024-06-27 21:51:00,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:00,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807246596] [2024-06-27 21:51:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:00,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:00,812 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 21:51:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:00,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807246596] [2024-06-27 21:51:00,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807246596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:00,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:00,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:00,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800776985] [2024-06-27 21:51:00,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:00,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:00,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:00,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:00,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 186 transitions, 2537 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:00,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:00,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:00,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:01,615 INFO L124 PetriNetUnfolderBase]: 3474/6817 cut-off events. [2024-06-27 21:51:01,615 INFO L125 PetriNetUnfolderBase]: For 37543/37678 co-relation queries the response was YES. [2024-06-27 21:51:01,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25651 conditions, 6817 events. 3474/6817 cut-off events. For 37543/37678 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 58980 event pairs, 1346 based on Foata normal form. 38/6218 useless extension candidates. Maximal degree in co-relation 25559. Up to 4644 conditions per place. [2024-06-27 21:51:01,678 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 147 selfloop transitions, 49 changer transitions 0/216 dead transitions. [2024-06-27 21:51:01,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 216 transitions, 3011 flow [2024-06-27 21:51:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 21:51:01,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:51:01,679 INFO L175 Difference]: Start difference. First operand has 223 places, 186 transitions, 2537 flow. Second operand 7 states and 210 transitions. [2024-06-27 21:51:01,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 216 transitions, 3011 flow [2024-06-27 21:51:01,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 216 transitions, 2865 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:51:01,820 INFO L231 Difference]: Finished difference. Result has 224 places, 186 transitions, 2495 flow [2024-06-27 21:51:01,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2495, PETRI_PLACES=224, PETRI_TRANSITIONS=186} [2024-06-27 21:51:01,821 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 175 predicate places. [2024-06-27 21:51:01,821 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 186 transitions, 2495 flow [2024-06-27 21:51:01,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:01,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:01,822 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 21:51:01,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:51:01,822 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:01,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1577490629, now seen corresponding path program 13 times [2024-06-27 21:51:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:01,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101124464] [2024-06-27 21:51:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:01,923 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 21:51:01,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101124464] [2024-06-27 21:51:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101124464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249442405] [2024-06-27 21:51:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:01,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:01,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:01,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:01,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 186 transitions, 2495 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:01,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:01,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:01,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:02,894 INFO L124 PetriNetUnfolderBase]: 3500/6892 cut-off events. [2024-06-27 21:51:02,894 INFO L125 PetriNetUnfolderBase]: For 37581/37718 co-relation queries the response was YES. [2024-06-27 21:51:02,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25417 conditions, 6892 events. 3500/6892 cut-off events. For 37581/37718 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 59957 event pairs, 1189 based on Foata normal form. 39/6359 useless extension candidates. Maximal degree in co-relation 25324. Up to 3452 conditions per place. [2024-06-27 21:51:02,938 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 126 selfloop transitions, 77 changer transitions 0/223 dead transitions. [2024-06-27 21:51:02,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 223 transitions, 3080 flow [2024-06-27 21:51:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 21:51:02,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-06-27 21:51:02,940 INFO L175 Difference]: Start difference. First operand has 224 places, 186 transitions, 2495 flow. Second operand 7 states and 215 transitions. [2024-06-27 21:51:02,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 223 transitions, 3080 flow [2024-06-27 21:51:03,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 223 transitions, 2868 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:51:03,045 INFO L231 Difference]: Finished difference. Result has 222 places, 187 transitions, 2456 flow [2024-06-27 21:51:03,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2456, PETRI_PLACES=222, PETRI_TRANSITIONS=187} [2024-06-27 21:51:03,046 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 173 predicate places. [2024-06-27 21:51:03,046 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 187 transitions, 2456 flow [2024-06-27 21:51:03,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:03,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:03,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:03,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:51:03,047 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:03,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1582853009, now seen corresponding path program 14 times [2024-06-27 21:51:03,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056915838] [2024-06-27 21:51:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:03,134 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 21:51:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056915838] [2024-06-27 21:51:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056915838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:03,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:03,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251336451] [2024-06-27 21:51:03,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:03,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:03,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 187 transitions, 2456 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:03,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:03,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:03,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:03,909 INFO L124 PetriNetUnfolderBase]: 3576/6993 cut-off events. [2024-06-27 21:51:03,909 INFO L125 PetriNetUnfolderBase]: For 42047/42195 co-relation queries the response was YES. [2024-06-27 21:51:03,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25960 conditions, 6993 events. 3576/6993 cut-off events. For 42047/42195 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 60923 event pairs, 1197 based on Foata normal form. 40/6416 useless extension candidates. Maximal degree in co-relation 25869. Up to 3513 conditions per place. [2024-06-27 21:51:03,971 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 130 selfloop transitions, 85 changer transitions 0/235 dead transitions. [2024-06-27 21:51:03,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 235 transitions, 3176 flow [2024-06-27 21:51:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:51:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:51:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2024-06-27 21:51:03,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:51:03,972 INFO L175 Difference]: Start difference. First operand has 222 places, 187 transitions, 2456 flow. Second operand 9 states and 270 transitions. [2024-06-27 21:51:03,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 235 transitions, 3176 flow [2024-06-27 21:51:04,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 235 transitions, 3008 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:51:04,113 INFO L231 Difference]: Finished difference. Result has 225 places, 189 transitions, 2494 flow [2024-06-27 21:51:04,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=225, PETRI_TRANSITIONS=189} [2024-06-27 21:51:04,114 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 176 predicate places. [2024-06-27 21:51:04,114 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 189 transitions, 2494 flow [2024-06-27 21:51:04,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:04,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:04,114 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 21:51:04,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:51:04,114 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:04,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:04,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1582615859, now seen corresponding path program 15 times [2024-06-27 21:51:04,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:04,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275156525] [2024-06-27 21:51:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:04,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:04,200 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 21:51:04,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:04,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275156525] [2024-06-27 21:51:04,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275156525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:04,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:04,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253477146] [2024-06-27 21:51:04,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:04,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:04,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:04,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:04,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 189 transitions, 2494 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:04,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:04,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:04,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:05,139 INFO L124 PetriNetUnfolderBase]: 3578/6994 cut-off events. [2024-06-27 21:51:05,139 INFO L125 PetriNetUnfolderBase]: For 37204/37351 co-relation queries the response was YES. [2024-06-27 21:51:05,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25773 conditions, 6994 events. 3578/6994 cut-off events. For 37204/37351 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 60803 event pairs, 1121 based on Foata normal form. 40/6473 useless extension candidates. Maximal degree in co-relation 25682. Up to 3508 conditions per place. [2024-06-27 21:51:05,191 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 129 selfloop transitions, 89 changer transitions 0/238 dead transitions. [2024-06-27 21:51:05,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 238 transitions, 3136 flow [2024-06-27 21:51:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:51:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:51:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2024-06-27 21:51:05,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-27 21:51:05,192 INFO L175 Difference]: Start difference. First operand has 225 places, 189 transitions, 2494 flow. Second operand 10 states and 294 transitions. [2024-06-27 21:51:05,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 238 transitions, 3136 flow [2024-06-27 21:51:05,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 238 transitions, 2954 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:51:05,323 INFO L231 Difference]: Finished difference. Result has 228 places, 189 transitions, 2498 flow [2024-06-27 21:51:05,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2498, PETRI_PLACES=228, PETRI_TRANSITIONS=189} [2024-06-27 21:51:05,323 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 179 predicate places. [2024-06-27 21:51:05,323 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 189 transitions, 2498 flow [2024-06-27 21:51:05,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:05,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:05,324 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 21:51:05,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:51:05,324 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:05,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:05,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1582615673, now seen corresponding path program 11 times [2024-06-27 21:51:05,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:05,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415340227] [2024-06-27 21:51:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:05,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:05,432 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 21:51:05,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415340227] [2024-06-27 21:51:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415340227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:05,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:05,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:05,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575312380] [2024-06-27 21:51:05,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:05,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:05,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:05,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:05,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 189 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:05,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:05,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:06,322 INFO L124 PetriNetUnfolderBase]: 3650/7161 cut-off events. [2024-06-27 21:51:06,323 INFO L125 PetriNetUnfolderBase]: For 39469/39598 co-relation queries the response was YES. [2024-06-27 21:51:06,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26164 conditions, 7161 events. 3650/7161 cut-off events. For 39469/39598 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 62619 event pairs, 1194 based on Foata normal form. 35/6564 useless extension candidates. Maximal degree in co-relation 26073. Up to 3900 conditions per place. [2024-06-27 21:51:06,422 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 134 selfloop transitions, 67 changer transitions 0/221 dead transitions. [2024-06-27 21:51:06,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 221 transitions, 3064 flow [2024-06-27 21:51:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 21:51:06,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 21:51:06,424 INFO L175 Difference]: Start difference. First operand has 228 places, 189 transitions, 2498 flow. Second operand 7 states and 207 transitions. [2024-06-27 21:51:06,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 221 transitions, 3064 flow [2024-06-27 21:51:06,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 221 transitions, 2868 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:06,551 INFO L231 Difference]: Finished difference. Result has 225 places, 190 transitions, 2454 flow [2024-06-27 21:51:06,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2304, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2454, PETRI_PLACES=225, PETRI_TRANSITIONS=190} [2024-06-27 21:51:06,551 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 176 predicate places. [2024-06-27 21:51:06,552 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 190 transitions, 2454 flow [2024-06-27 21:51:06,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:06,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:06,552 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 21:51:06,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:51:06,552 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:06,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 57616731, now seen corresponding path program 12 times [2024-06-27 21:51:06,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:06,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870880067] [2024-06-27 21:51:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:06,656 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 21:51:06,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:06,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870880067] [2024-06-27 21:51:06,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870880067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:06,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:06,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:06,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497814716] [2024-06-27 21:51:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:06,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:06,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:06,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:06,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 190 transitions, 2454 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:06,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:06,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:06,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:07,459 INFO L124 PetriNetUnfolderBase]: 3734/7273 cut-off events. [2024-06-27 21:51:07,460 INFO L125 PetriNetUnfolderBase]: For 38099/38230 co-relation queries the response was YES. [2024-06-27 21:51:07,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26300 conditions, 7273 events. 3734/7273 cut-off events. For 38099/38230 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 63874 event pairs, 1176 based on Foata normal form. 44/6676 useless extension candidates. Maximal degree in co-relation 26209. Up to 3928 conditions per place. [2024-06-27 21:51:07,523 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 135 selfloop transitions, 63 changer transitions 0/218 dead transitions. [2024-06-27 21:51:07,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 218 transitions, 3006 flow [2024-06-27 21:51:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 21:51:07,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 21:51:07,524 INFO L175 Difference]: Start difference. First operand has 225 places, 190 transitions, 2454 flow. Second operand 7 states and 203 transitions. [2024-06-27 21:51:07,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 218 transitions, 3006 flow [2024-06-27 21:51:07,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 218 transitions, 2906 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:51:07,645 INFO L231 Difference]: Finished difference. Result has 227 places, 191 transitions, 2498 flow [2024-06-27 21:51:07,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=227, PETRI_TRANSITIONS=191} [2024-06-27 21:51:07,646 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 178 predicate places. [2024-06-27 21:51:07,646 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 191 transitions, 2498 flow [2024-06-27 21:51:07,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:07,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:07,646 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 21:51:07,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:51:07,646 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:07,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash 57616917, now seen corresponding path program 16 times [2024-06-27 21:51:07,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:07,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885443184] [2024-06-27 21:51:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:07,738 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 21:51:07,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:07,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885443184] [2024-06-27 21:51:07,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885443184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:07,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:07,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794137288] [2024-06-27 21:51:07,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:07,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:07,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:07,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:07,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 191 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:07,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:07,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:07,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:08,660 INFO L124 PetriNetUnfolderBase]: 3849/7546 cut-off events. [2024-06-27 21:51:08,660 INFO L125 PetriNetUnfolderBase]: For 42339/42525 co-relation queries the response was YES. [2024-06-27 21:51:08,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27200 conditions, 7546 events. 3849/7546 cut-off events. For 42339/42525 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 66845 event pairs, 1288 based on Foata normal form. 48/6936 useless extension candidates. Maximal degree in co-relation 27109. Up to 3721 conditions per place. [2024-06-27 21:51:08,715 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 136 selfloop transitions, 85 changer transitions 0/241 dead transitions. [2024-06-27 21:51:08,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 241 transitions, 3232 flow [2024-06-27 21:51:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:51:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:51:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2024-06-27 21:51:08,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-27 21:51:08,716 INFO L175 Difference]: Start difference. First operand has 227 places, 191 transitions, 2498 flow. Second operand 11 states and 315 transitions. [2024-06-27 21:51:08,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 241 transitions, 3232 flow [2024-06-27 21:51:08,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 241 transitions, 3066 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:51:08,837 INFO L231 Difference]: Finished difference. Result has 233 places, 193 transitions, 2528 flow [2024-06-27 21:51:08,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2528, PETRI_PLACES=233, PETRI_TRANSITIONS=193} [2024-06-27 21:51:08,838 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 184 predicate places. [2024-06-27 21:51:08,838 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 193 transitions, 2528 flow [2024-06-27 21:51:08,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:08,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:08,838 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 21:51:08,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:51:08,839 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:08,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 57854067, now seen corresponding path program 17 times [2024-06-27 21:51:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:08,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888312295] [2024-06-27 21:51:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:08,937 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 21:51:08,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888312295] [2024-06-27 21:51:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888312295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:08,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764494390] [2024-06-27 21:51:08,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:08,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:08,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:08,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 193 transitions, 2528 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:08,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:08,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:08,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:09,756 INFO L124 PetriNetUnfolderBase]: 3846/7523 cut-off events. [2024-06-27 21:51:09,756 INFO L125 PetriNetUnfolderBase]: For 41988/42173 co-relation queries the response was YES. [2024-06-27 21:51:09,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27096 conditions, 7523 events. 3846/7523 cut-off events. For 41988/42173 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 66585 event pairs, 1299 based on Foata normal form. 48/6905 useless extension candidates. Maximal degree in co-relation 27004. Up to 3716 conditions per place. [2024-06-27 21:51:09,822 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 127 selfloop transitions, 84 changer transitions 0/231 dead transitions. [2024-06-27 21:51:09,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 231 transitions, 3126 flow [2024-06-27 21:51:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:51:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:51:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-27 21:51:09,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6469135802469136 [2024-06-27 21:51:09,823 INFO L175 Difference]: Start difference. First operand has 233 places, 193 transitions, 2528 flow. Second operand 9 states and 262 transitions. [2024-06-27 21:51:09,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 231 transitions, 3126 flow [2024-06-27 21:51:09,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 231 transitions, 2914 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 21:51:09,952 INFO L231 Difference]: Finished difference. Result has 234 places, 193 transitions, 2488 flow [2024-06-27 21:51:09,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2488, PETRI_PLACES=234, PETRI_TRANSITIONS=193} [2024-06-27 21:51:09,952 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 185 predicate places. [2024-06-27 21:51:09,952 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 193 transitions, 2488 flow [2024-06-27 21:51:09,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:09,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:09,953 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 21:51:09,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:51:09,953 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:09,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash -119514603, now seen corresponding path program 18 times [2024-06-27 21:51:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:09,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73431356] [2024-06-27 21:51:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:09,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:10,040 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 21:51:10,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73431356] [2024-06-27 21:51:10,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73431356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:10,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:10,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:10,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486263033] [2024-06-27 21:51:10,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:10,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:10,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:10,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:10,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 193 transitions, 2488 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:10,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:10,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:10,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:10,874 INFO L124 PetriNetUnfolderBase]: 3819/7490 cut-off events. [2024-06-27 21:51:10,874 INFO L125 PetriNetUnfolderBase]: For 36639/36821 co-relation queries the response was YES. [2024-06-27 21:51:10,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26576 conditions, 7490 events. 3819/7490 cut-off events. For 36639/36821 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 66195 event pairs, 1193 based on Foata normal form. 48/6949 useless extension candidates. Maximal degree in co-relation 26483. Up to 3718 conditions per place. [2024-06-27 21:51:10,945 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 124 selfloop transitions, 90 changer transitions 0/234 dead transitions. [2024-06-27 21:51:10,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 234 transitions, 3032 flow [2024-06-27 21:51:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:51:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:51:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-27 21:51:10,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-27 21:51:10,947 INFO L175 Difference]: Start difference. First operand has 234 places, 193 transitions, 2488 flow. Second operand 10 states and 286 transitions. [2024-06-27 21:51:10,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 234 transitions, 3032 flow [2024-06-27 21:51:11,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 234 transitions, 2862 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 21:51:11,096 INFO L231 Difference]: Finished difference. Result has 236 places, 193 transitions, 2502 flow [2024-06-27 21:51:11,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2502, PETRI_PLACES=236, PETRI_TRANSITIONS=193} [2024-06-27 21:51:11,097 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 187 predicate places. [2024-06-27 21:51:11,097 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 193 transitions, 2502 flow [2024-06-27 21:51:11,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:11,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:11,097 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 21:51:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:51:11,097 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:11,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash -119634759, now seen corresponding path program 13 times [2024-06-27 21:51:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309635444] [2024-06-27 21:51:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:11,196 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 21:51:11,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:11,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309635444] [2024-06-27 21:51:11,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309635444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:11,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:11,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:11,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580747790] [2024-06-27 21:51:11,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:11,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:11,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:11,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 193 transitions, 2502 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:11,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:11,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:11,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:12,022 INFO L124 PetriNetUnfolderBase]: 3905/7576 cut-off events. [2024-06-27 21:51:12,022 INFO L125 PetriNetUnfolderBase]: For 36190/36344 co-relation queries the response was YES. [2024-06-27 21:51:12,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27060 conditions, 7576 events. 3905/7576 cut-off events. For 36190/36344 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 66808 event pairs, 1420 based on Foata normal form. 35/6881 useless extension candidates. Maximal degree in co-relation 26966. Up to 5285 conditions per place. [2024-06-27 21:51:12,089 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 182 selfloop transitions, 18 changer transitions 0/220 dead transitions. [2024-06-27 21:51:12,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 220 transitions, 2987 flow [2024-06-27 21:51:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 21:51:12,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-27 21:51:12,090 INFO L175 Difference]: Start difference. First operand has 236 places, 193 transitions, 2502 flow. Second operand 7 states and 199 transitions. [2024-06-27 21:51:12,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 220 transitions, 2987 flow [2024-06-27 21:51:12,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 220 transitions, 2759 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:12,234 INFO L231 Difference]: Finished difference. Result has 233 places, 194 transitions, 2327 flow [2024-06-27 21:51:12,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2327, PETRI_PLACES=233, PETRI_TRANSITIONS=194} [2024-06-27 21:51:12,234 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 184 predicate places. [2024-06-27 21:51:12,235 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 194 transitions, 2327 flow [2024-06-27 21:51:12,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:12,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:12,235 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 21:51:12,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:51:12,235 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:12,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:12,235 INFO L85 PathProgramCache]: Analyzing trace with hash 496745773, now seen corresponding path program 14 times [2024-06-27 21:51:12,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990027864] [2024-06-27 21:51:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:12,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:12,335 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 21:51:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990027864] [2024-06-27 21:51:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990027864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:12,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:51:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260534334] [2024-06-27 21:51:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:12,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:51:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:51:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:51:12,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:12,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 194 transitions, 2327 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:12,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:12,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:12,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:13,301 INFO L124 PetriNetUnfolderBase]: 3874/7599 cut-off events. [2024-06-27 21:51:13,301 INFO L125 PetriNetUnfolderBase]: For 32661/32809 co-relation queries the response was YES. [2024-06-27 21:51:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25396 conditions, 7599 events. 3874/7599 cut-off events. For 32661/32809 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 67393 event pairs, 1281 based on Foata normal form. 44/6945 useless extension candidates. Maximal degree in co-relation 25302. Up to 4091 conditions per place. [2024-06-27 21:51:13,369 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 137 selfloop transitions, 64 changer transitions 0/221 dead transitions. [2024-06-27 21:51:13,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 221 transitions, 2805 flow [2024-06-27 21:51:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 21:51:13,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 21:51:13,370 INFO L175 Difference]: Start difference. First operand has 233 places, 194 transitions, 2327 flow. Second operand 7 states and 203 transitions. [2024-06-27 21:51:13,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 221 transitions, 2805 flow [2024-06-27 21:51:13,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 221 transitions, 2696 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 21:51:13,500 INFO L231 Difference]: Finished difference. Result has 232 places, 194 transitions, 2350 flow [2024-06-27 21:51:13,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2350, PETRI_PLACES=232, PETRI_TRANSITIONS=194} [2024-06-27 21:51:13,501 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 183 predicate places. [2024-06-27 21:51:13,501 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 194 transitions, 2350 flow [2024-06-27 21:51:13,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 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 21:51:13,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:13,501 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 21:51:13,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:51:13,502 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:13,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1450580723, now seen corresponding path program 1 times [2024-06-27 21:51:13,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:13,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104645381] [2024-06-27 21:51:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:13,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:13,603 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 21:51:13,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:13,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104645381] [2024-06-27 21:51:13,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104645381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:13,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:13,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813663952] [2024-06-27 21:51:13,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:13,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:13,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:13,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 194 transitions, 2350 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:13,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:13,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:13,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:14,552 INFO L124 PetriNetUnfolderBase]: 4515/8833 cut-off events. [2024-06-27 21:51:14,552 INFO L125 PetriNetUnfolderBase]: For 46759/46941 co-relation queries the response was YES. [2024-06-27 21:51:14,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29588 conditions, 8833 events. 4515/8833 cut-off events. For 46759/46941 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 80648 event pairs, 1179 based on Foata normal form. 43/8200 useless extension candidates. Maximal degree in co-relation 29495. Up to 4302 conditions per place. [2024-06-27 21:51:14,633 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 160 selfloop transitions, 68 changer transitions 0/248 dead transitions. [2024-06-27 21:51:14,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 248 transitions, 3129 flow [2024-06-27 21:51:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:51:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:51:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-27 21:51:14,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 21:51:14,634 INFO L175 Difference]: Start difference. First operand has 232 places, 194 transitions, 2350 flow. Second operand 8 states and 244 transitions. [2024-06-27 21:51:14,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 248 transitions, 3129 flow [2024-06-27 21:51:14,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 248 transitions, 2946 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:51:14,974 INFO L231 Difference]: Finished difference. Result has 235 places, 205 transitions, 2482 flow [2024-06-27 21:51:14,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2482, PETRI_PLACES=235, PETRI_TRANSITIONS=205} [2024-06-27 21:51:14,974 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 186 predicate places. [2024-06-27 21:51:14,974 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 205 transitions, 2482 flow [2024-06-27 21:51:14,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:14,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:14,975 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 21:51:14,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:51:14,975 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:14,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1904211741, now seen corresponding path program 2 times [2024-06-27 21:51:14,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:14,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552452539] [2024-06-27 21:51:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:14,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:15,099 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 21:51:15,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552452539] [2024-06-27 21:51:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552452539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:15,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:15,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696473987] [2024-06-27 21:51:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:15,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:15,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:15,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:15,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:15,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 205 transitions, 2482 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:15,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:15,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:15,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:16,169 INFO L124 PetriNetUnfolderBase]: 4719/9587 cut-off events. [2024-06-27 21:51:16,169 INFO L125 PetriNetUnfolderBase]: For 61773/61978 co-relation queries the response was YES. [2024-06-27 21:51:16,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31677 conditions, 9587 events. 4719/9587 cut-off events. For 61773/61978 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 90798 event pairs, 1729 based on Foata normal form. 44/8796 useless extension candidates. Maximal degree in co-relation 31582. Up to 5552 conditions per place. [2024-06-27 21:51:16,259 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 169 selfloop transitions, 55 changer transitions 0/244 dead transitions. [2024-06-27 21:51:16,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 244 transitions, 3129 flow [2024-06-27 21:51:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:51:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:51:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-27 21:51:16,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-27 21:51:16,260 INFO L175 Difference]: Start difference. First operand has 235 places, 205 transitions, 2482 flow. Second operand 8 states and 242 transitions. [2024-06-27 21:51:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 244 transitions, 3129 flow [2024-06-27 21:51:16,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 244 transitions, 3027 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:51:16,487 INFO L231 Difference]: Finished difference. Result has 239 places, 206 transitions, 2529 flow [2024-06-27 21:51:16,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2529, PETRI_PLACES=239, PETRI_TRANSITIONS=206} [2024-06-27 21:51:16,488 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 190 predicate places. [2024-06-27 21:51:16,488 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 206 transitions, 2529 flow [2024-06-27 21:51:16,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:16,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:16,488 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 21:51:16,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:51:16,489 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:16,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:16,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1504951695, now seen corresponding path program 3 times [2024-06-27 21:51:16,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:16,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28786357] [2024-06-27 21:51:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:16,594 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 21:51:16,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:16,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28786357] [2024-06-27 21:51:16,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28786357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:16,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:16,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:16,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263715519] [2024-06-27 21:51:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:16,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:16,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:16,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:16,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:16,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:16,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 206 transitions, 2529 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:16,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:16,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:16,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:17,670 INFO L124 PetriNetUnfolderBase]: 4717/9449 cut-off events. [2024-06-27 21:51:17,670 INFO L125 PetriNetUnfolderBase]: For 55275/55464 co-relation queries the response was YES. [2024-06-27 21:51:17,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31071 conditions, 9449 events. 4717/9449 cut-off events. For 55275/55464 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 88459 event pairs, 1684 based on Foata normal form. 45/8614 useless extension candidates. Maximal degree in co-relation 30974. Up to 5534 conditions per place. [2024-06-27 21:51:17,758 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 174 selfloop transitions, 58 changer transitions 0/252 dead transitions. [2024-06-27 21:51:17,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 252 transitions, 3121 flow [2024-06-27 21:51:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:51:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:51:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 295 transitions. [2024-06-27 21:51:17,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:51:17,759 INFO L175 Difference]: Start difference. First operand has 239 places, 206 transitions, 2529 flow. Second operand 10 states and 295 transitions. [2024-06-27 21:51:17,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 252 transitions, 3121 flow [2024-06-27 21:51:18,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 252 transitions, 3027 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:51:18,140 INFO L231 Difference]: Finished difference. Result has 244 places, 206 transitions, 2558 flow [2024-06-27 21:51:18,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2558, PETRI_PLACES=244, PETRI_TRANSITIONS=206} [2024-06-27 21:51:18,141 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 195 predicate places. [2024-06-27 21:51:18,141 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 206 transitions, 2558 flow [2024-06-27 21:51:18,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:18,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:18,141 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 21:51:18,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:51:18,141 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:18,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:18,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1451757913, now seen corresponding path program 4 times [2024-06-27 21:51:18,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:18,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627369722] [2024-06-27 21:51:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:18,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:18,260 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 21:51:18,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627369722] [2024-06-27 21:51:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627369722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:18,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:18,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:18,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529038727] [2024-06-27 21:51:18,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:18,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:18,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:18,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 206 transitions, 2558 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:18,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:18,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:18,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:19,478 INFO L124 PetriNetUnfolderBase]: 4818/9659 cut-off events. [2024-06-27 21:51:19,478 INFO L125 PetriNetUnfolderBase]: For 58975/59173 co-relation queries the response was YES. [2024-06-27 21:51:19,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31835 conditions, 9659 events. 4818/9659 cut-off events. For 58975/59173 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 91320 event pairs, 1224 based on Foata normal form. 46/8956 useless extension candidates. Maximal degree in co-relation 31737. Up to 4686 conditions per place. [2024-06-27 21:51:19,570 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 164 selfloop transitions, 73 changer transitions 0/257 dead transitions. [2024-06-27 21:51:19,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 257 transitions, 3264 flow [2024-06-27 21:51:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:51:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:51:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 299 transitions. [2024-06-27 21:51:19,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6644444444444444 [2024-06-27 21:51:19,571 INFO L175 Difference]: Start difference. First operand has 244 places, 206 transitions, 2558 flow. Second operand 10 states and 299 transitions. [2024-06-27 21:51:19,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 257 transitions, 3264 flow [2024-06-27 21:51:19,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 257 transitions, 3167 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:51:19,772 INFO L231 Difference]: Finished difference. Result has 247 places, 207 transitions, 2651 flow [2024-06-27 21:51:19,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2651, PETRI_PLACES=247, PETRI_TRANSITIONS=207} [2024-06-27 21:51:19,773 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 198 predicate places. [2024-06-27 21:51:19,773 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 207 transitions, 2651 flow [2024-06-27 21:51:19,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:19,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:19,774 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 21:51:19,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:51:19,774 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:19,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1444406263, now seen corresponding path program 5 times [2024-06-27 21:51:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:19,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620069678] [2024-06-27 21:51:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:19,890 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 21:51:19,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:19,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620069678] [2024-06-27 21:51:19,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620069678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:19,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:19,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:19,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852742223] [2024-06-27 21:51:19,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:19,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:19,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:19,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:19,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 207 transitions, 2651 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:19,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:19,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:19,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:21,239 INFO L124 PetriNetUnfolderBase]: 4928/9980 cut-off events. [2024-06-27 21:51:21,239 INFO L125 PetriNetUnfolderBase]: For 62316/62510 co-relation queries the response was YES. [2024-06-27 21:51:21,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 9980 events. 4928/9980 cut-off events. For 62316/62510 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 95513 event pairs, 1255 based on Foata normal form. 49/9257 useless extension candidates. Maximal degree in co-relation 32921. Up to 4691 conditions per place. [2024-06-27 21:51:21,313 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 161 selfloop transitions, 73 changer transitions 0/254 dead transitions. [2024-06-27 21:51:21,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 254 transitions, 3331 flow [2024-06-27 21:51:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:51:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:51:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2024-06-27 21:51:21,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 21:51:21,315 INFO L175 Difference]: Start difference. First operand has 247 places, 207 transitions, 2651 flow. Second operand 9 states and 273 transitions. [2024-06-27 21:51:21,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 254 transitions, 3331 flow [2024-06-27 21:51:21,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 254 transitions, 3174 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 21:51:21,538 INFO L231 Difference]: Finished difference. Result has 247 places, 207 transitions, 2654 flow [2024-06-27 21:51:21,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2654, PETRI_PLACES=247, PETRI_TRANSITIONS=207} [2024-06-27 21:51:21,538 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 198 predicate places. [2024-06-27 21:51:21,538 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 207 transitions, 2654 flow [2024-06-27 21:51:21,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:21,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:21,539 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] [2024-06-27 21:51:21,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:51:21,539 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:21,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash -839824355, now seen corresponding path program 6 times [2024-06-27 21:51:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53784437] [2024-06-27 21:51:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:21,665 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 21:51:21,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:21,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53784437] [2024-06-27 21:51:21,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53784437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:21,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:21,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093617302] [2024-06-27 21:51:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:21,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:21,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:21,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:21,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 207 transitions, 2654 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:21,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:21,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:21,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:22,985 INFO L124 PetriNetUnfolderBase]: 4944/10004 cut-off events. [2024-06-27 21:51:22,985 INFO L125 PetriNetUnfolderBase]: For 48750/48946 co-relation queries the response was YES. [2024-06-27 21:51:23,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32531 conditions, 10004 events. 4944/10004 cut-off events. For 48750/48946 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 95678 event pairs, 1153 based on Foata normal form. 46/9276 useless extension candidates. Maximal degree in co-relation 32431. Up to 4711 conditions per place. [2024-06-27 21:51:23,093 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 155 selfloop transitions, 67 changer transitions 0/242 dead transitions. [2024-06-27 21:51:23,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 242 transitions, 3194 flow [2024-06-27 21:51:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 21:51:23,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 21:51:23,094 INFO L175 Difference]: Start difference. First operand has 247 places, 207 transitions, 2654 flow. Second operand 7 states and 216 transitions. [2024-06-27 21:51:23,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 242 transitions, 3194 flow [2024-06-27 21:51:23,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 242 transitions, 3041 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 21:51:23,347 INFO L231 Difference]: Finished difference. Result has 246 places, 207 transitions, 2647 flow [2024-06-27 21:51:23,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2647, PETRI_PLACES=246, PETRI_TRANSITIONS=207} [2024-06-27 21:51:23,348 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 197 predicate places. [2024-06-27 21:51:23,348 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 207 transitions, 2647 flow [2024-06-27 21:51:23,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:23,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:23,348 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 21:51:23,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:51:23,348 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:23,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1222479993, now seen corresponding path program 7 times [2024-06-27 21:51:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:23,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418281931] [2024-06-27 21:51:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:23,460 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 21:51:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:23,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418281931] [2024-06-27 21:51:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418281931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:23,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122982940] [2024-06-27 21:51:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:23,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:23,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:23,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 207 transitions, 2647 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:23,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:23,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:23,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:24,798 INFO L124 PetriNetUnfolderBase]: 5442/11026 cut-off events. [2024-06-27 21:51:24,798 INFO L125 PetriNetUnfolderBase]: For 73084/73317 co-relation queries the response was YES. [2024-06-27 21:51:24,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35783 conditions, 11026 events. 5442/11026 cut-off events. For 73084/73317 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 107175 event pairs, 1241 based on Foata normal form. 47/10147 useless extension candidates. Maximal degree in co-relation 35683. Up to 2497 conditions per place. [2024-06-27 21:51:24,905 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 149 selfloop transitions, 102 changer transitions 0/271 dead transitions. [2024-06-27 21:51:24,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 271 transitions, 3491 flow [2024-06-27 21:51:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:51:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:51:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 346 transitions. [2024-06-27 21:51:24,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 21:51:24,907 INFO L175 Difference]: Start difference. First operand has 246 places, 207 transitions, 2647 flow. Second operand 12 states and 346 transitions. [2024-06-27 21:51:24,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 271 transitions, 3491 flow [2024-06-27 21:51:25,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 271 transitions, 3346 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:51:25,247 INFO L231 Difference]: Finished difference. Result has 251 places, 207 transitions, 2713 flow [2024-06-27 21:51:25,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2713, PETRI_PLACES=251, PETRI_TRANSITIONS=207} [2024-06-27 21:51:25,247 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 202 predicate places. [2024-06-27 21:51:25,247 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 207 transitions, 2713 flow [2024-06-27 21:51:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:25,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:25,248 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 21:51:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:51:25,248 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:25,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 840391851, now seen corresponding path program 8 times [2024-06-27 21:51:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224774904] [2024-06-27 21:51:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:25,384 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 21:51:25,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224774904] [2024-06-27 21:51:25,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224774904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:25,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:25,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:25,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395280161] [2024-06-27 21:51:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:25,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:25,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:25,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 207 transitions, 2713 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:25,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:25,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:25,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:26,824 INFO L124 PetriNetUnfolderBase]: 5651/11535 cut-off events. [2024-06-27 21:51:26,824 INFO L125 PetriNetUnfolderBase]: For 87554/87795 co-relation queries the response was YES. [2024-06-27 21:51:26,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38113 conditions, 11535 events. 5651/11535 cut-off events. For 87554/87795 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 113648 event pairs, 2286 based on Foata normal form. 48/10442 useless extension candidates. Maximal degree in co-relation 38013. Up to 6591 conditions per place. [2024-06-27 21:51:26,923 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 171 selfloop transitions, 74 changer transitions 0/265 dead transitions. [2024-06-27 21:51:26,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 265 transitions, 3449 flow [2024-06-27 21:51:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:51:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:51:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 344 transitions. [2024-06-27 21:51:26,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 21:51:26,924 INFO L175 Difference]: Start difference. First operand has 251 places, 207 transitions, 2713 flow. Second operand 12 states and 344 transitions. [2024-06-27 21:51:26,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 265 transitions, 3449 flow [2024-06-27 21:51:27,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 265 transitions, 3255 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:51:27,225 INFO L231 Difference]: Finished difference. Result has 254 places, 207 transitions, 2670 flow [2024-06-27 21:51:27,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2670, PETRI_PLACES=254, PETRI_TRANSITIONS=207} [2024-06-27 21:51:27,225 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 205 predicate places. [2024-06-27 21:51:27,225 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 207 transitions, 2670 flow [2024-06-27 21:51:27,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:27,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:27,226 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 21:51:27,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:51:27,226 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:27,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash 267638237, now seen corresponding path program 9 times [2024-06-27 21:51:27,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:27,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462566526] [2024-06-27 21:51:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:27,314 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 21:51:27,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462566526] [2024-06-27 21:51:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462566526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:27,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521318005] [2024-06-27 21:51:27,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:27,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:27,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:27,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:27,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 207 transitions, 2670 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:27,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:27,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:27,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:28,663 INFO L124 PetriNetUnfolderBase]: 5812/11970 cut-off events. [2024-06-27 21:51:28,664 INFO L125 PetriNetUnfolderBase]: For 85542/85789 co-relation queries the response was YES. [2024-06-27 21:51:28,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38308 conditions, 11970 events. 5812/11970 cut-off events. For 85542/85789 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 119420 event pairs, 1070 based on Foata normal form. 49/11116 useless extension candidates. Maximal degree in co-relation 38207. Up to 3165 conditions per place. [2024-06-27 21:51:28,785 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 135 selfloop transitions, 114 changer transitions 0/269 dead transitions. [2024-06-27 21:51:28,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 269 transitions, 3510 flow [2024-06-27 21:51:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:51:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:51:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 346 transitions. [2024-06-27 21:51:28,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 21:51:28,787 INFO L175 Difference]: Start difference. First operand has 254 places, 207 transitions, 2670 flow. Second operand 12 states and 346 transitions. [2024-06-27 21:51:28,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 269 transitions, 3510 flow [2024-06-27 21:51:29,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 269 transitions, 3363 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:29,152 INFO L231 Difference]: Finished difference. Result has 256 places, 207 transitions, 2754 flow [2024-06-27 21:51:29,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2754, PETRI_PLACES=256, PETRI_TRANSITIONS=207} [2024-06-27 21:51:29,153 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 207 predicate places. [2024-06-27 21:51:29,153 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 207 transitions, 2754 flow [2024-06-27 21:51:29,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:29,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:29,153 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 21:51:29,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:51:29,153 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:29,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash 276903827, now seen corresponding path program 10 times [2024-06-27 21:51:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:29,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412385512] [2024-06-27 21:51:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:29,244 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 21:51:29,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:29,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412385512] [2024-06-27 21:51:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412385512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:29,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:29,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862915231] [2024-06-27 21:51:29,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:29,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:29,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:29,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:29,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:29,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 207 transitions, 2754 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:29,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:29,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:29,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:30,693 INFO L124 PetriNetUnfolderBase]: 5928/12297 cut-off events. [2024-06-27 21:51:30,693 INFO L125 PetriNetUnfolderBase]: For 99779/100026 co-relation queries the response was YES. [2024-06-27 21:51:30,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40183 conditions, 12297 events. 5928/12297 cut-off events. For 99779/100026 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 124410 event pairs, 1233 based on Foata normal form. 53/11435 useless extension candidates. Maximal degree in co-relation 40081. Up to 2989 conditions per place. [2024-06-27 21:51:30,820 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 143 selfloop transitions, 98 changer transitions 0/261 dead transitions. [2024-06-27 21:51:30,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 261 transitions, 3560 flow [2024-06-27 21:51:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:51:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:51:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 320 transitions. [2024-06-27 21:51:30,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-06-27 21:51:30,822 INFO L175 Difference]: Start difference. First operand has 256 places, 207 transitions, 2754 flow. Second operand 11 states and 320 transitions. [2024-06-27 21:51:30,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 261 transitions, 3560 flow [2024-06-27 21:51:31,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 261 transitions, 3349 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:51:31,585 INFO L231 Difference]: Finished difference. Result has 258 places, 207 transitions, 2743 flow [2024-06-27 21:51:31,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2743, PETRI_PLACES=258, PETRI_TRANSITIONS=207} [2024-06-27 21:51:31,586 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 209 predicate places. [2024-06-27 21:51:31,586 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 207 transitions, 2743 flow [2024-06-27 21:51:31,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:31,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:31,586 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 21:51:31,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:51:31,587 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:31,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash 276892667, now seen corresponding path program 11 times [2024-06-27 21:51:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:31,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689366751] [2024-06-27 21:51:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:31,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:31,683 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 21:51:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689366751] [2024-06-27 21:51:31,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689366751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:31,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:31,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:31,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941951403] [2024-06-27 21:51:31,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:31,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:31,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:31,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:31,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 207 transitions, 2743 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:31,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:31,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:31,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:33,541 INFO L124 PetriNetUnfolderBase]: 5933/12173 cut-off events. [2024-06-27 21:51:33,541 INFO L125 PetriNetUnfolderBase]: For 86252/86491 co-relation queries the response was YES. [2024-06-27 21:51:33,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39483 conditions, 12173 events. 5933/12173 cut-off events. For 86252/86491 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 122027 event pairs, 1171 based on Foata normal form. 52/11266 useless extension candidates. Maximal degree in co-relation 39380. Up to 2997 conditions per place. [2024-06-27 21:51:33,647 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 151 selfloop transitions, 100 changer transitions 0/271 dead transitions. [2024-06-27 21:51:33,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 271 transitions, 3511 flow [2024-06-27 21:51:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:51:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:51:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 371 transitions. [2024-06-27 21:51:33,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341880341880342 [2024-06-27 21:51:33,649 INFO L175 Difference]: Start difference. First operand has 258 places, 207 transitions, 2743 flow. Second operand 13 states and 371 transitions. [2024-06-27 21:51:33,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 271 transitions, 3511 flow [2024-06-27 21:51:34,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 271 transitions, 3317 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:51:34,031 INFO L231 Difference]: Finished difference. Result has 262 places, 207 transitions, 2752 flow [2024-06-27 21:51:34,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2752, PETRI_PLACES=262, PETRI_TRANSITIONS=207} [2024-06-27 21:51:34,031 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 213 predicate places. [2024-06-27 21:51:34,032 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 207 transitions, 2752 flow [2024-06-27 21:51:34,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:34,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:34,032 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 21:51:34,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:51:34,033 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:34,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash 105129107, now seen corresponding path program 12 times [2024-06-27 21:51:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288239703] [2024-06-27 21:51:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:34,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:34,157 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 21:51:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288239703] [2024-06-27 21:51:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288239703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:34,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:34,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699569370] [2024-06-27 21:51:34,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:34,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:34,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:34,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:34,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 207 transitions, 2752 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:34,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:34,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:34,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:36,233 INFO L124 PetriNetUnfolderBase]: 6088/12502 cut-off events. [2024-06-27 21:51:36,233 INFO L125 PetriNetUnfolderBase]: For 91466/91709 co-relation queries the response was YES. [2024-06-27 21:51:36,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40365 conditions, 12502 events. 6088/12502 cut-off events. For 91466/91709 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 125718 event pairs, 2577 based on Foata normal form. 53/11287 useless extension candidates. Maximal degree in co-relation 40261. Up to 7124 conditions per place. [2024-06-27 21:51:36,348 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 175 selfloop transitions, 74 changer transitions 0/269 dead transitions. [2024-06-27 21:51:36,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 269 transitions, 3424 flow [2024-06-27 21:51:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:51:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:51:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 368 transitions. [2024-06-27 21:51:36,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.629059829059829 [2024-06-27 21:51:36,349 INFO L175 Difference]: Start difference. First operand has 262 places, 207 transitions, 2752 flow. Second operand 13 states and 368 transitions. [2024-06-27 21:51:36,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 269 transitions, 3424 flow [2024-06-27 21:51:36,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 269 transitions, 3227 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:36,882 INFO L231 Difference]: Finished difference. Result has 265 places, 207 transitions, 2706 flow [2024-06-27 21:51:36,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2706, PETRI_PLACES=265, PETRI_TRANSITIONS=207} [2024-06-27 21:51:36,883 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 216 predicate places. [2024-06-27 21:51:36,883 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 207 transitions, 2706 flow [2024-06-27 21:51:36,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:36,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:36,883 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 21:51:36,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:51:36,884 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:36,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 392183837, now seen corresponding path program 13 times [2024-06-27 21:51:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:36,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53845085] [2024-06-27 21:51:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:37,003 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 21:51:37,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53845085] [2024-06-27 21:51:37,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53845085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:37,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:37,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772419323] [2024-06-27 21:51:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:37,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:37,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:37,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 207 transitions, 2706 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:37,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:37,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:37,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:39,199 INFO L124 PetriNetUnfolderBase]: 6588/13679 cut-off events. [2024-06-27 21:51:39,200 INFO L125 PetriNetUnfolderBase]: For 121007/121274 co-relation queries the response was YES. [2024-06-27 21:51:39,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43441 conditions, 13679 events. 6588/13679 cut-off events. For 121007/121274 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 141042 event pairs, 2476 based on Foata normal form. 57/12363 useless extension candidates. Maximal degree in co-relation 43336. Up to 6047 conditions per place. [2024-06-27 21:51:39,325 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 165 selfloop transitions, 76 changer transitions 0/261 dead transitions. [2024-06-27 21:51:39,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 261 transitions, 3529 flow [2024-06-27 21:51:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:51:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:51:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 322 transitions. [2024-06-27 21:51:39,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6505050505050505 [2024-06-27 21:51:39,326 INFO L175 Difference]: Start difference. First operand has 265 places, 207 transitions, 2706 flow. Second operand 11 states and 322 transitions. [2024-06-27 21:51:39,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 261 transitions, 3529 flow [2024-06-27 21:51:39,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 261 transitions, 3383 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:39,757 INFO L231 Difference]: Finished difference. Result has 267 places, 208 transitions, 2731 flow [2024-06-27 21:51:39,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2731, PETRI_PLACES=267, PETRI_TRANSITIONS=208} [2024-06-27 21:51:39,757 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 218 predicate places. [2024-06-27 21:51:39,757 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 208 transitions, 2731 flow [2024-06-27 21:51:39,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:39,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:39,758 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 21:51:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:51:39,758 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:39,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash 392194997, now seen corresponding path program 14 times [2024-06-27 21:51:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:39,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673219158] [2024-06-27 21:51:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:39,868 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 21:51:39,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673219158] [2024-06-27 21:51:39,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673219158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:39,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:39,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411052796] [2024-06-27 21:51:39,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:39,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:39,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:39,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:39,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:39,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:39,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 208 transitions, 2731 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:39,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:39,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:39,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:42,320 INFO L124 PetriNetUnfolderBase]: 6819/14246 cut-off events. [2024-06-27 21:51:42,320 INFO L125 PetriNetUnfolderBase]: For 144121/144399 co-relation queries the response was YES. [2024-06-27 21:51:42,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45522 conditions, 14246 events. 6819/14246 cut-off events. For 144121/144399 co-relation queries the response was YES. Maximal size of possible extension queue 1367. Compared 148482 event pairs, 2534 based on Foata normal form. 60/12909 useless extension candidates. Maximal degree in co-relation 45415. Up to 6028 conditions per place. [2024-06-27 21:51:42,443 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 163 selfloop transitions, 78 changer transitions 0/261 dead transitions. [2024-06-27 21:51:42,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 261 transitions, 3551 flow [2024-06-27 21:51:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:51:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:51:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 323 transitions. [2024-06-27 21:51:42,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6525252525252525 [2024-06-27 21:51:42,444 INFO L175 Difference]: Start difference. First operand has 267 places, 208 transitions, 2731 flow. Second operand 11 states and 323 transitions. [2024-06-27 21:51:42,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 261 transitions, 3551 flow [2024-06-27 21:51:43,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 261 transitions, 3407 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:51:43,052 INFO L231 Difference]: Finished difference. Result has 270 places, 208 transitions, 2747 flow [2024-06-27 21:51:43,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2587, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2747, PETRI_PLACES=270, PETRI_TRANSITIONS=208} [2024-06-27 21:51:43,053 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 221 predicate places. [2024-06-27 21:51:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 208 transitions, 2747 flow [2024-06-27 21:51:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:43,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:43,054 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 21:51:43,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:51:43,054 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:43,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash 392367977, now seen corresponding path program 15 times [2024-06-27 21:51:43,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:43,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347094570] [2024-06-27 21:51:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:43,172 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 21:51:43,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:43,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347094570] [2024-06-27 21:51:43,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347094570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:43,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:43,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:43,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354484834] [2024-06-27 21:51:43,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:43,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:43,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:43,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:43,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:43,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:43,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 208 transitions, 2747 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:43,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:43,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:43,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:45,403 INFO L124 PetriNetUnfolderBase]: 6852/14169 cut-off events. [2024-06-27 21:51:45,403 INFO L125 PetriNetUnfolderBase]: For 127171/127446 co-relation queries the response was YES. [2024-06-27 21:51:45,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44946 conditions, 14169 events. 6852/14169 cut-off events. For 127171/127446 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 147325 event pairs, 2371 based on Foata normal form. 60/12826 useless extension candidates. Maximal degree in co-relation 44838. Up to 6012 conditions per place. [2024-06-27 21:51:45,537 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 168 selfloop transitions, 78 changer transitions 0/266 dead transitions. [2024-06-27 21:51:45,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 266 transitions, 3595 flow [2024-06-27 21:51:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:51:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:51:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 350 transitions. [2024-06-27 21:51:45,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 21:51:45,538 INFO L175 Difference]: Start difference. First operand has 270 places, 208 transitions, 2747 flow. Second operand 12 states and 350 transitions. [2024-06-27 21:51:45,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 266 transitions, 3595 flow [2024-06-27 21:51:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 266 transitions, 3463 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:51:46,386 INFO L231 Difference]: Finished difference. Result has 274 places, 208 transitions, 2775 flow [2024-06-27 21:51:46,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2775, PETRI_PLACES=274, PETRI_TRANSITIONS=208} [2024-06-27 21:51:46,387 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 225 predicate places. [2024-06-27 21:51:46,387 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 208 transitions, 2775 flow [2024-06-27 21:51:46,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:46,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:46,387 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 21:51:46,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:51:46,387 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:46,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 392362397, now seen corresponding path program 16 times [2024-06-27 21:51:46,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:46,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306210770] [2024-06-27 21:51:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:46,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:46,491 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 21:51:46,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306210770] [2024-06-27 21:51:46,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306210770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:46,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:46,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:46,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018980093] [2024-06-27 21:51:46,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:46,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:46,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:46,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:46,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:46,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 208 transitions, 2775 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:46,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:46,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:46,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:48,831 INFO L124 PetriNetUnfolderBase]: 6909/14425 cut-off events. [2024-06-27 21:51:48,831 INFO L125 PetriNetUnfolderBase]: For 135967/136242 co-relation queries the response was YES. [2024-06-27 21:51:48,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45947 conditions, 14425 events. 6909/14425 cut-off events. For 135967/136242 co-relation queries the response was YES. Maximal size of possible extension queue 1383. Compared 150587 event pairs, 2729 based on Foata normal form. 58/13094 useless extension candidates. Maximal degree in co-relation 45838. Up to 6074 conditions per place. [2024-06-27 21:51:48,953 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 168 selfloop transitions, 82 changer transitions 0/270 dead transitions. [2024-06-27 21:51:48,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 270 transitions, 3547 flow [2024-06-27 21:51:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:51:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:51:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 373 transitions. [2024-06-27 21:51:48,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376068376068376 [2024-06-27 21:51:48,955 INFO L175 Difference]: Start difference. First operand has 274 places, 208 transitions, 2775 flow. Second operand 13 states and 373 transitions. [2024-06-27 21:51:48,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 270 transitions, 3547 flow [2024-06-27 21:51:49,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 270 transitions, 3385 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:49,524 INFO L231 Difference]: Finished difference. Result has 277 places, 208 transitions, 2780 flow [2024-06-27 21:51:49,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2780, PETRI_PLACES=277, PETRI_TRANSITIONS=208} [2024-06-27 21:51:49,524 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 228 predicate places. [2024-06-27 21:51:49,524 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 208 transitions, 2780 flow [2024-06-27 21:51:49,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:49,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:49,525 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 21:51:49,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:51:49,525 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:49,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash 392016437, now seen corresponding path program 17 times [2024-06-27 21:51:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:49,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108933650] [2024-06-27 21:51:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:49,619 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 21:51:49,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:49,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108933650] [2024-06-27 21:51:49,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108933650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:49,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:49,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340566478] [2024-06-27 21:51:49,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:49,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:49,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:49,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:49,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 208 transitions, 2780 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:49,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:49,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:49,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:51,921 INFO L124 PetriNetUnfolderBase]: 6912/14504 cut-off events. [2024-06-27 21:51:51,921 INFO L125 PetriNetUnfolderBase]: For 118310/118579 co-relation queries the response was YES. [2024-06-27 21:51:52,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45266 conditions, 14504 events. 6912/14504 cut-off events. For 118310/118579 co-relation queries the response was YES. Maximal size of possible extension queue 1379. Compared 151871 event pairs, 2735 based on Foata normal form. 60/13132 useless extension candidates. Maximal degree in co-relation 45156. Up to 6019 conditions per place. [2024-06-27 21:51:52,064 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 179 selfloop transitions, 81 changer transitions 0/280 dead transitions. [2024-06-27 21:51:52,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 280 transitions, 3602 flow [2024-06-27 21:51:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 21:51:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 21:51:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 425 transitions. [2024-06-27 21:51:52,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 21:51:52,066 INFO L175 Difference]: Start difference. First operand has 277 places, 208 transitions, 2780 flow. Second operand 15 states and 425 transitions. [2024-06-27 21:51:52,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 280 transitions, 3602 flow [2024-06-27 21:51:52,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 280 transitions, 3443 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:51:52,909 INFO L231 Difference]: Finished difference. Result has 282 places, 208 transitions, 2786 flow [2024-06-27 21:51:52,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2621, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2786, PETRI_PLACES=282, PETRI_TRANSITIONS=208} [2024-06-27 21:51:52,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 233 predicate places. [2024-06-27 21:51:52,910 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 208 transitions, 2786 flow [2024-06-27 21:51:52,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:52,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:52,910 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 21:51:52,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:51:52,910 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:52,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash 392010857, now seen corresponding path program 18 times [2024-06-27 21:51:52,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:52,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359855568] [2024-06-27 21:51:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:53,018 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 21:51:53,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:53,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359855568] [2024-06-27 21:51:53,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359855568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:53,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:53,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765138171] [2024-06-27 21:51:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:53,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:53,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 208 transitions, 2786 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:53,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:53,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:53,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:55,509 INFO L124 PetriNetUnfolderBase]: 6947/14494 cut-off events. [2024-06-27 21:51:55,510 INFO L125 PetriNetUnfolderBase]: For 107652/107912 co-relation queries the response was YES. [2024-06-27 21:51:55,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44801 conditions, 14494 events. 6947/14494 cut-off events. For 107652/107912 co-relation queries the response was YES. Maximal size of possible extension queue 1377. Compared 151422 event pairs, 2752 based on Foata normal form. 60/13092 useless extension candidates. Maximal degree in co-relation 44690. Up to 6041 conditions per place. [2024-06-27 21:51:55,643 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 174 selfloop transitions, 80 changer transitions 0/274 dead transitions. [2024-06-27 21:51:55,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 274 transitions, 3478 flow [2024-06-27 21:51:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:51:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:51:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 399 transitions. [2024-06-27 21:51:55,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 21:51:55,644 INFO L175 Difference]: Start difference. First operand has 282 places, 208 transitions, 2786 flow. Second operand 14 states and 399 transitions. [2024-06-27 21:51:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 274 transitions, 3478 flow [2024-06-27 21:51:56,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 274 transitions, 3319 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 21:51:56,066 INFO L231 Difference]: Finished difference. Result has 284 places, 208 transitions, 2790 flow [2024-06-27 21:51:56,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2790, PETRI_PLACES=284, PETRI_TRANSITIONS=208} [2024-06-27 21:51:56,067 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 235 predicate places. [2024-06-27 21:51:56,067 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 208 transitions, 2790 flow [2024-06-27 21:51:56,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:56,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:56,067 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 21:51:56,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:51:56,067 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:56,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:56,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1961511705, now seen corresponding path program 19 times [2024-06-27 21:51:56,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:56,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560249186] [2024-06-27 21:51:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:56,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:56,165 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 21:51:56,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:56,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560249186] [2024-06-27 21:51:56,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560249186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:56,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:56,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:56,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796980008] [2024-06-27 21:51:56,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:56,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:56,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:56,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:56,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:56,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:56,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 208 transitions, 2790 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:56,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:56,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:56,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:58,700 INFO L124 PetriNetUnfolderBase]: 7624/16016 cut-off events. [2024-06-27 21:51:58,700 INFO L125 PetriNetUnfolderBase]: For 168147/168435 co-relation queries the response was YES. [2024-06-27 21:51:58,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50272 conditions, 16016 events. 7624/16016 cut-off events. For 168147/168435 co-relation queries the response was YES. Maximal size of possible extension queue 1544. Compared 170926 event pairs, 2137 based on Foata normal form. 64/14628 useless extension candidates. Maximal degree in co-relation 50160. Up to 4145 conditions per place. [2024-06-27 21:51:58,851 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 158 selfloop transitions, 105 changer transitions 0/283 dead transitions. [2024-06-27 21:51:58,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 283 transitions, 3743 flow [2024-06-27 21:51:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:51:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:51:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 382 transitions. [2024-06-27 21:51:58,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652991452991453 [2024-06-27 21:51:58,853 INFO L175 Difference]: Start difference. First operand has 284 places, 208 transitions, 2790 flow. Second operand 13 states and 382 transitions. [2024-06-27 21:51:58,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 283 transitions, 3743 flow [2024-06-27 21:51:59,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 283 transitions, 3590 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:51:59,840 INFO L231 Difference]: Finished difference. Result has 287 places, 210 transitions, 2900 flow [2024-06-27 21:51:59,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2900, PETRI_PLACES=287, PETRI_TRANSITIONS=210} [2024-06-27 21:51:59,841 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 238 predicate places. [2024-06-27 21:51:59,841 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 210 transitions, 2900 flow [2024-06-27 21:51:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:59,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:59,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:59,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:51:59,842 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:59,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1931904633, now seen corresponding path program 20 times [2024-06-27 21:51:59,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:59,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293233656] [2024-06-27 21:51:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:59,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:59,950 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 21:51:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293233656] [2024-06-27 21:51:59,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293233656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:59,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:51:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374121646] [2024-06-27 21:51:59,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:51:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:51:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:51:59,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:51:59,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 210 transitions, 2900 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:51:59,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:59,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:51:59,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:02,577 INFO L124 PetriNetUnfolderBase]: 7606/16081 cut-off events. [2024-06-27 21:52:02,577 INFO L125 PetriNetUnfolderBase]: For 161088/161367 co-relation queries the response was YES. [2024-06-27 21:52:02,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50628 conditions, 16081 events. 7606/16081 cut-off events. For 161088/161367 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 171974 event pairs, 2593 based on Foata normal form. 64/14678 useless extension candidates. Maximal degree in co-relation 50514. Up to 4149 conditions per place. [2024-06-27 21:52:02,731 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 158 selfloop transitions, 103 changer transitions 0/281 dead transitions. [2024-06-27 21:52:02,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 281 transitions, 3832 flow [2024-06-27 21:52:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:52:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:52:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 361 transitions. [2024-06-27 21:52:02,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6685185185185185 [2024-06-27 21:52:02,732 INFO L175 Difference]: Start difference. First operand has 287 places, 210 transitions, 2900 flow. Second operand 12 states and 361 transitions. [2024-06-27 21:52:02,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 281 transitions, 3832 flow [2024-06-27 21:52:03,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 281 transitions, 3645 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 21:52:03,261 INFO L231 Difference]: Finished difference. Result has 288 places, 210 transitions, 2932 flow [2024-06-27 21:52:03,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2932, PETRI_PLACES=288, PETRI_TRANSITIONS=210} [2024-06-27 21:52:03,261 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 239 predicate places. [2024-06-27 21:52:03,262 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 210 transitions, 2932 flow [2024-06-27 21:52:03,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:52:03,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:03,262 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 21:52:03,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:52:03,262 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:03,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:03,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1931553093, now seen corresponding path program 21 times [2024-06-27 21:52:03,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:03,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214847433] [2024-06-27 21:52:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:03,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:03,357 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 21:52:03,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:03,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214847433] [2024-06-27 21:52:03,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214847433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:03,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:03,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:52:03,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101603410] [2024-06-27 21:52:03,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:03,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:52:03,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:52:03,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:52:03,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 21:52:03,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 210 transitions, 2932 flow. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 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 21:52:03,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:03,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 21:52:03,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand