./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe024_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe024_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/safe024_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe024_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 17:54:51,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:54:51,983 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:54:51,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:54:51,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:54:52,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:54:52,011 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:54:52,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:54:52,012 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:54:52,015 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:54:52,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:54:52,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:54:52,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:54:52,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:54:52,018 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:54:52,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:54:52,018 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:54:52,019 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:54:52,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:54:52,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:54:52,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:54:52,020 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:54:52,020 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:54:52,020 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:54:52,020 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:54:52,020 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:54:52,021 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:54:52,021 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:54:52,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:54:52,021 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:54:52,022 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:54:52,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:54:52,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:54:52,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:54:52,023 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:54:52,023 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:54:52,023 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:54:52,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:54:52,024 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:54:52,024 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:54:52,024 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:54:52,024 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:54:52,024 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:54:52,025 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:54:52,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:54:52,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:54:52,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:54:52,289 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:54:52,290 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:54:52,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe024_tso.yml/witness.yml [2024-06-27 17:54:52,398 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:54:52,399 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:54:52,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe024_tso.i [2024-06-27 17:54:53,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:54:53,687 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:54:53,688 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe024_tso.i [2024-06-27 17:54:53,698 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b15dfdb7/0886e6e15a134e7da8782eac953913e6/FLAGe5d69843a [2024-06-27 17:54:53,708 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b15dfdb7/0886e6e15a134e7da8782eac953913e6 [2024-06-27 17:54:53,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:54:53,709 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:54:53,710 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:54:53,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:54:53,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:54:53,714 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:52" (1/2) ... [2024-06-27 17:54:53,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e39ede0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:54:53, skipping insertion in model container [2024-06-27 17:54:53,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:52" (1/2) ... [2024-06-27 17:54:53,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6bcdbc90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:54:53, skipping insertion in model container [2024-06-27 17:54:53,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:54:53" (2/2) ... [2024-06-27 17:54:53,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e39ede0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:53, skipping insertion in model container [2024-06-27 17:54:53,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:54:53" (2/2) ... [2024-06-27 17:54:53,717 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:54:53,753 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:54:53,754 INFO L97 edCorrectnessWitness]: Location invariant before [L788-L788] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 17:54:53,754 INFO L97 edCorrectnessWitness]: Location invariant before [L787-L787] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 17:54:53,754 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 17:54:53,755 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:54:53,755 INFO L106 edCorrectnessWitness]: ghost_update [L783-L783] multithreaded = 1; [2024-06-27 17:54:53,785 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:54:53,922 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/safe024_tso.i[945,958] [2024-06-27 17:54:54,058 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:54:54,065 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:54:54,141 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/safe024_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:54:54,190 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:54:54,218 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:54:54,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54 WrapperNode [2024-06-27 17:54:54,219 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:54:54,220 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:54:54,220 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:54:54,220 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:54:54,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,272 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-06-27 17:54:54,272 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:54:54,273 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:54:54,273 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:54:54,273 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:54:54,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,306 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:54:54,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,320 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:54:54,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:54:54,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:54:54,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:54:54,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (1/1) ... [2024-06-27 17:54:54,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:54:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:54:54,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:54:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:54:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:54:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:54:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:54:54,394 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:54:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:54:54,394 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:54:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:54:54,394 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:54:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:54:54,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:54:54,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:54:54,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:54:54,396 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:54:54,519 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:54:54,521 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:54:54,652 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:54:54,652 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:54:54,730 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:54:54,730 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:54:54,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:54:54 BoogieIcfgContainer [2024-06-27 17:54:54,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:54:54,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:54:54,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:54:54,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:54:54,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:52" (1/4) ... [2024-06-27 17:54:54,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c6e4ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:54:54, skipping insertion in model container [2024-06-27 17:54:54,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:54:53" (2/4) ... [2024-06-27 17:54:54,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c6e4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:54:54, skipping insertion in model container [2024-06-27 17:54:54,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:54" (3/4) ... [2024-06-27 17:54:54,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c6e4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:54:54, skipping insertion in model container [2024-06-27 17:54:54,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:54:54" (4/4) ... [2024-06-27 17:54:54,743 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_tso.i [2024-06-27 17:54:54,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:54:54,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:54:54,756 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:54:54,791 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:54:54,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:54:54,847 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 17:54:54,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:54:54,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 17:54:54,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:54:54,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 17:54:54,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:54:54,867 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;@3c2535a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:54:54,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:54:54,870 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:54:54,871 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:54:54,871 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:54:54,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:54,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:54:54,872 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 17:54:54,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 211854220, now seen corresponding path program 1 times [2024-06-27 17:54:54,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:54,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627072630] [2024-06-27 17:54:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:55,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627072630] [2024-06-27 17:54:55,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627072630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:55,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:55,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:54:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510959499] [2024-06-27 17:54:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:55,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:54:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:54:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:54:55,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-06-27 17:54:55,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:55,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:55,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-06-27 17:54:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:55,551 INFO L124 PetriNetUnfolderBase]: 736/1198 cut-off events. [2024-06-27 17:54:55,551 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 17:54:55,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2383 conditions, 1198 events. 736/1198 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6270 event pairs, 397 based on Foata normal form. 1/1144 useless extension candidates. Maximal degree in co-relation 2371. Up to 1120 conditions per place. [2024-06-27 17:54:55,563 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 31 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-27 17:54:55,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 189 flow [2024-06-27 17:54:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:54:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:54:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-27 17:54:55,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7318840579710145 [2024-06-27 17:54:55,574 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 101 transitions. [2024-06-27 17:54:55,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 189 flow [2024-06-27 17:54:55,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:55,580 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-27 17:54:55,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 17:54:55,584 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 17:54:55,584 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-27 17:54:55,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:55,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:55,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:54:55,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:55,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1729120605, now seen corresponding path program 1 times [2024-06-27 17:54:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:55,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343473160] [2024-06-27 17:54:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:55,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:55,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343473160] [2024-06-27 17:54:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343473160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:54:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358762600] [2024-06-27 17:54:55,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:54:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:55,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:54:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:54:55,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 17:54:55,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:55,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:55,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 17:54:55,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:55,913 INFO L124 PetriNetUnfolderBase]: 962/1584 cut-off events. [2024-06-27 17:54:55,913 INFO L125 PetriNetUnfolderBase]: For 320/354 co-relation queries the response was YES. [2024-06-27 17:54:55,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3527 conditions, 1584 events. 962/1584 cut-off events. For 320/354 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8792 event pairs, 491 based on Foata normal form. 3/1544 useless extension candidates. Maximal degree in co-relation 3515. Up to 1423 conditions per place. [2024-06-27 17:54:55,923 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 44 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-06-27 17:54:55,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 282 flow [2024-06-27 17:54:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:54:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:54:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 17:54:55,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2024-06-27 17:54:55,925 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 131 transitions. [2024-06-27 17:54:55,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 282 flow [2024-06-27 17:54:55,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:55,928 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-06-27 17:54:55,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 17:54:55,929 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-06-27 17:54:55,929 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-06-27 17:54:55,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:55,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:55,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:55,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:54:55,930 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 17:54:55,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash -95411809, now seen corresponding path program 1 times [2024-06-27 17:54:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:55,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407967190] [2024-06-27 17:54:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:56,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407967190] [2024-06-27 17:54:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407967190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:56,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:56,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:54:56,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334909210] [2024-06-27 17:54:56,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:54:56,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:54:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:54:56,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 17:54:56,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:56,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:56,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 17:54:56,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:56,176 INFO L124 PetriNetUnfolderBase]: 982/1597 cut-off events. [2024-06-27 17:54:56,176 INFO L125 PetriNetUnfolderBase]: For 781/875 co-relation queries the response was YES. [2024-06-27 17:54:56,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3981 conditions, 1597 events. 982/1597 cut-off events. For 781/875 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8911 event pairs, 466 based on Foata normal form. 2/1530 useless extension candidates. Maximal degree in co-relation 3966. Up to 1460 conditions per place. [2024-06-27 17:54:56,184 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 40 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-27 17:54:56,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 312 flow [2024-06-27 17:54:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:54:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:54:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 17:54:56,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902173913043478 [2024-06-27 17:54:56,185 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 4 states and 127 transitions. [2024-06-27 17:54:56,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 312 flow [2024-06-27 17:54:56,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 310 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:56,188 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 209 flow [2024-06-27 17:54:56,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-27 17:54:56,188 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-06-27 17:54:56,189 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 209 flow [2024-06-27 17:54:56,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:56,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:56,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:56,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:54:56,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:56,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash -716173719, now seen corresponding path program 1 times [2024-06-27 17:54:56,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:56,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717394324] [2024-06-27 17:54:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:56,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:56,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:56,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717394324] [2024-06-27 17:54:56,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717394324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:56,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:56,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293812319] [2024-06-27 17:54:56,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:56,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:56,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:54:56,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:56,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:56,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:54:56,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:56,608 INFO L124 PetriNetUnfolderBase]: 1214/1961 cut-off events. [2024-06-27 17:54:56,608 INFO L125 PetriNetUnfolderBase]: For 1617/1627 co-relation queries the response was YES. [2024-06-27 17:54:56,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5328 conditions, 1961 events. 1214/1961 cut-off events. For 1617/1627 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10877 event pairs, 309 based on Foata normal form. 12/1952 useless extension candidates. Maximal degree in co-relation 5310. Up to 1730 conditions per place. [2024-06-27 17:54:56,620 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 63 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2024-06-27 17:54:56,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 457 flow [2024-06-27 17:54:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:54:56,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 17:54:56,624 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 209 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:54:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 457 flow [2024-06-27 17:54:56,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 440 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:56,628 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 249 flow [2024-06-27 17:54:56,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-27 17:54:56,629 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-06-27 17:54:56,629 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 249 flow [2024-06-27 17:54:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:56,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:56,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:56,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:54:56,630 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 17:54:56,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1337202354, now seen corresponding path program 1 times [2024-06-27 17:54:56,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:56,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406826902] [2024-06-27 17:54:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:56,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:56,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406826902] [2024-06-27 17:54:56,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406826902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:56,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:56,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306964496] [2024-06-27 17:54:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:56,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:54:56,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:56,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:56,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:54:56,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:56,959 INFO L124 PetriNetUnfolderBase]: 1279/2116 cut-off events. [2024-06-27 17:54:56,959 INFO L125 PetriNetUnfolderBase]: For 2769/2789 co-relation queries the response was YES. [2024-06-27 17:54:56,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 2116 events. 1279/2116 cut-off events. For 2769/2789 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12263 event pairs, 451 based on Foata normal form. 2/2085 useless extension candidates. Maximal degree in co-relation 6110. Up to 1843 conditions per place. [2024-06-27 17:54:56,969 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 57 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-27 17:54:56,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 477 flow [2024-06-27 17:54:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 17:54:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-06-27 17:54:56,970 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 249 flow. Second operand 5 states and 151 transitions. [2024-06-27 17:54:56,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 477 flow [2024-06-27 17:54:56,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:56,977 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 314 flow [2024-06-27 17:54:56,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-27 17:54:56,979 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-06-27 17:54:56,982 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 314 flow [2024-06-27 17:54:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:54:56,983 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 17:54:56,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 357849314, now seen corresponding path program 1 times [2024-06-27 17:54:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580059670] [2024-06-27 17:54:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:57,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580059670] [2024-06-27 17:54:57,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580059670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:57,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398831284] [2024-06-27 17:54:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:57,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:54:57,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:57,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:57,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:54:57,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:57,330 INFO L124 PetriNetUnfolderBase]: 1397/2271 cut-off events. [2024-06-27 17:54:57,330 INFO L125 PetriNetUnfolderBase]: For 3549/3578 co-relation queries the response was YES. [2024-06-27 17:54:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7028 conditions, 2271 events. 1397/2271 cut-off events. For 3549/3578 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12875 event pairs, 433 based on Foata normal form. 26/2280 useless extension candidates. Maximal degree in co-relation 7005. Up to 1983 conditions per place. [2024-06-27 17:54:57,342 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 64 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-06-27 17:54:57,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 606 flow [2024-06-27 17:54:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 17:54:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2024-06-27 17:54:57,343 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 314 flow. Second operand 5 states and 158 transitions. [2024-06-27 17:54:57,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 606 flow [2024-06-27 17:54:57,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 602 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:57,348 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 419 flow [2024-06-27 17:54:57,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-27 17:54:57,350 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-06-27 17:54:57,350 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 419 flow [2024-06-27 17:54:57,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:57,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:57,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:57,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:54:57,351 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 17:54:57,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:57,351 INFO L85 PathProgramCache]: Analyzing trace with hash 400495394, now seen corresponding path program 2 times [2024-06-27 17:54:57,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159127517] [2024-06-27 17:54:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:57,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159127517] [2024-06-27 17:54:57,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159127517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:57,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:57,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871460705] [2024-06-27 17:54:57,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:57,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:54:57,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 419 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:57,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:57,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:54:57,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:57,701 INFO L124 PetriNetUnfolderBase]: 1460/2425 cut-off events. [2024-06-27 17:54:57,701 INFO L125 PetriNetUnfolderBase]: For 5197/5216 co-relation queries the response was YES. [2024-06-27 17:54:57,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 2425 events. 1460/2425 cut-off events. For 5197/5216 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14103 event pairs, 459 based on Foata normal form. 14/2425 useless extension candidates. Maximal degree in co-relation 8075. Up to 2070 conditions per place. [2024-06-27 17:54:57,714 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 59 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-27 17:54:57,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 623 flow [2024-06-27 17:54:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:54:57,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-27 17:54:57,715 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 419 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:54:57,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 623 flow [2024-06-27 17:54:57,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 603 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:57,722 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 444 flow [2024-06-27 17:54:57,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2024-06-27 17:54:57,723 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2024-06-27 17:54:57,723 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 444 flow [2024-06-27 17:54:57,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:57,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:57,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:57,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:54:57,723 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 17:54:57,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1739026701, now seen corresponding path program 1 times [2024-06-27 17:54:57,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:57,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735488772] [2024-06-27 17:54:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:57,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:57,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735488772] [2024-06-27 17:54:57,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735488772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:57,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:57,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267177249] [2024-06-27 17:54:57,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:57,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:57,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:57,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:54:57,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:57,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:57,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:54:57,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:58,058 INFO L124 PetriNetUnfolderBase]: 1529/2452 cut-off events. [2024-06-27 17:54:58,058 INFO L125 PetriNetUnfolderBase]: For 5704/5707 co-relation queries the response was YES. [2024-06-27 17:54:58,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8245 conditions, 2452 events. 1529/2452 cut-off events. For 5704/5707 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13813 event pairs, 487 based on Foata normal form. 2/2448 useless extension candidates. Maximal degree in co-relation 8215. Up to 2147 conditions per place. [2024-06-27 17:54:58,071 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 85 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-06-27 17:54:58,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 836 flow [2024-06-27 17:54:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:54:58,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:54:58,072 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 444 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:54:58,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 836 flow [2024-06-27 17:54:58,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 119 transitions, 780 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:58,080 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 538 flow [2024-06-27 17:54:58,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-27 17:54:58,081 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-06-27 17:54:58,081 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 538 flow [2024-06-27 17:54:58,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:58,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:58,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:54:58,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:58,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1283011793, now seen corresponding path program 2 times [2024-06-27 17:54:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776298689] [2024-06-27 17:54:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:58,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:58,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776298689] [2024-06-27 17:54:58,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776298689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:58,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:58,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:58,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74744626] [2024-06-27 17:54:58,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:58,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:58,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:58,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:58,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:54:58,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:58,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:58,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:54:58,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:58,404 INFO L124 PetriNetUnfolderBase]: 1546/2554 cut-off events. [2024-06-27 17:54:58,404 INFO L125 PetriNetUnfolderBase]: For 7131/7131 co-relation queries the response was YES. [2024-06-27 17:54:58,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 2554 events. 1546/2554 cut-off events. For 7131/7131 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14878 event pairs, 704 based on Foata normal form. 2/2528 useless extension candidates. Maximal degree in co-relation 8932. Up to 2165 conditions per place. [2024-06-27 17:54:58,417 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 81 selfloop transitions, 26 changer transitions 0/121 dead transitions. [2024-06-27 17:54:58,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 892 flow [2024-06-27 17:54:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:54:58,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:54:58,419 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 538 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:54:58,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 892 flow [2024-06-27 17:54:58,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 858 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:58,428 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 616 flow [2024-06-27 17:54:58,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-27 17:54:58,429 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2024-06-27 17:54:58,429 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 616 flow [2024-06-27 17:54:58,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:58,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:58,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:58,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:54:58,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:58,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash 856001267, now seen corresponding path program 3 times [2024-06-27 17:54:58,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:58,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517546593] [2024-06-27 17:54:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:58,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517546593] [2024-06-27 17:54:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517546593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136421114] [2024-06-27 17:54:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:58,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:58,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:54:58,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 616 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:58,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:58,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:54:58,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:58,760 INFO L124 PetriNetUnfolderBase]: 1541/2529 cut-off events. [2024-06-27 17:54:58,760 INFO L125 PetriNetUnfolderBase]: For 8162/8162 co-relation queries the response was YES. [2024-06-27 17:54:58,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 2529 events. 1541/2529 cut-off events. For 8162/8162 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14575 event pairs, 518 based on Foata normal form. 2/2522 useless extension candidates. Maximal degree in co-relation 9039. Up to 2160 conditions per place. [2024-06-27 17:54:58,771 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 80 selfloop transitions, 25 changer transitions 0/119 dead transitions. [2024-06-27 17:54:58,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 890 flow [2024-06-27 17:54:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:54:58,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:54:58,772 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 616 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:54:58,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 890 flow [2024-06-27 17:54:58,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 862 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:58,782 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 646 flow [2024-06-27 17:54:58,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=646, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-06-27 17:54:58,783 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2024-06-27 17:54:58,783 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 646 flow [2024-06-27 17:54:58,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:58,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:58,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:58,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:54:58,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:58,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash 856278097, now seen corresponding path program 1 times [2024-06-27 17:54:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:58,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916067970] [2024-06-27 17:54:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:58,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:58,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:58,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916067970] [2024-06-27 17:54:58,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916067970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:58,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:58,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614114462] [2024-06-27 17:54:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:58,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:54:58,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 646 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:58,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:58,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:54:58,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:59,114 INFO L124 PetriNetUnfolderBase]: 1388/2297 cut-off events. [2024-06-27 17:54:59,115 INFO L125 PetriNetUnfolderBase]: For 9681/9681 co-relation queries the response was YES. [2024-06-27 17:54:59,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8587 conditions, 2297 events. 1388/2297 cut-off events. For 9681/9681 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13241 event pairs, 402 based on Foata normal form. 4/2273 useless extension candidates. Maximal degree in co-relation 8551. Up to 1951 conditions per place. [2024-06-27 17:54:59,126 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 88 selfloop transitions, 12 changer transitions 0/122 dead transitions. [2024-06-27 17:54:59,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 122 transitions, 924 flow [2024-06-27 17:54:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:54:59,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:54:59,127 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 646 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:54:59,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 122 transitions, 924 flow [2024-06-27 17:54:59,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 874 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:59,141 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 643 flow [2024-06-27 17:54:59,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=643, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-27 17:54:59,141 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-27 17:54:59,141 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 643 flow [2024-06-27 17:54:59,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:59,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:59,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:59,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:54:59,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:59,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:59,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1349821219, now seen corresponding path program 1 times [2024-06-27 17:54:59,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:59,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780953852] [2024-06-27 17:54:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:59,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:59,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780953852] [2024-06-27 17:54:59,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780953852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:59,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:59,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:59,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822263940] [2024-06-27 17:54:59,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:59,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:59,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:54:59,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 643 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:59,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:59,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:54:59,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:59,494 INFO L124 PetriNetUnfolderBase]: 1453/2482 cut-off events. [2024-06-27 17:54:59,495 INFO L125 PetriNetUnfolderBase]: For 11733/11763 co-relation queries the response was YES. [2024-06-27 17:54:59,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9264 conditions, 2482 events. 1453/2482 cut-off events. For 11733/11763 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14546 event pairs, 460 based on Foata normal form. 25/2439 useless extension candidates. Maximal degree in co-relation 9227. Up to 2031 conditions per place. [2024-06-27 17:54:59,507 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 88 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-27 17:54:59,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 951 flow [2024-06-27 17:54:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:54:59,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-27 17:54:59,508 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 643 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:54:59,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 951 flow [2024-06-27 17:54:59,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 130 transitions, 922 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:59,520 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 680 flow [2024-06-27 17:54:59,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-06-27 17:54:59,520 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-06-27 17:54:59,521 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 680 flow [2024-06-27 17:54:59,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:59,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:59,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:59,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:54:59,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:59,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:59,521 INFO L85 PathProgramCache]: Analyzing trace with hash 364097297, now seen corresponding path program 2 times [2024-06-27 17:54:59,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:59,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473940511] [2024-06-27 17:54:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:59,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:59,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473940511] [2024-06-27 17:54:59,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473940511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:59,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:59,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898979416] [2024-06-27 17:54:59,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:59,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:59,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:59,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:54:59,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 680 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:59,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:59,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:54:59,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:59,875 INFO L124 PetriNetUnfolderBase]: 1514/2563 cut-off events. [2024-06-27 17:54:59,875 INFO L125 PetriNetUnfolderBase]: For 14239/14267 co-relation queries the response was YES. [2024-06-27 17:54:59,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10096 conditions, 2563 events. 1514/2563 cut-off events. For 14239/14267 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15253 event pairs, 472 based on Foata normal form. 24/2513 useless extension candidates. Maximal degree in co-relation 10058. Up to 2015 conditions per place. [2024-06-27 17:54:59,889 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 78 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-27 17:54:59,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 1072 flow [2024-06-27 17:54:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-27 17:54:59,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-06-27 17:54:59,891 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 680 flow. Second operand 6 states and 188 transitions. [2024-06-27 17:54:59,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 1072 flow [2024-06-27 17:54:59,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1030 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:59,904 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 765 flow [2024-06-27 17:54:59,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=765, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-27 17:54:59,904 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-27 17:54:59,905 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 765 flow [2024-06-27 17:54:59,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:59,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:59,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:59,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:54:59,905 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:59,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1126939905, now seen corresponding path program 3 times [2024-06-27 17:54:59,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:59,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969215017] [2024-06-27 17:54:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:59,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969215017] [2024-06-27 17:54:59,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969215017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:59,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:59,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:59,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933966960] [2024-06-27 17:54:59,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:59,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:59,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:00,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:00,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 765 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:00,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:00,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:00,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:00,252 INFO L124 PetriNetUnfolderBase]: 1502/2456 cut-off events. [2024-06-27 17:55:00,252 INFO L125 PetriNetUnfolderBase]: For 16386/16409 co-relation queries the response was YES. [2024-06-27 17:55:00,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10428 conditions, 2456 events. 1502/2456 cut-off events. For 16386/16409 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14384 event pairs, 406 based on Foata normal form. 18/2391 useless extension candidates. Maximal degree in co-relation 10389. Up to 2003 conditions per place. [2024-06-27 17:55:00,268 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 73 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-06-27 17:55:00,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1039 flow [2024-06-27 17:55:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:55:00,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:55:00,269 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 765 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:55:00,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1039 flow [2024-06-27 17:55:00,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 989 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:00,288 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 788 flow [2024-06-27 17:55:00,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=788, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2024-06-27 17:55:00,289 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2024-06-27 17:55:00,289 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 788 flow [2024-06-27 17:55:00,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:00,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:00,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:00,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:55:00,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:00,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1524349748, now seen corresponding path program 1 times [2024-06-27 17:55:00,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616360085] [2024-06-27 17:55:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:00,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:00,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:00,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616360085] [2024-06-27 17:55:00,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616360085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:00,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:00,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:00,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487114028] [2024-06-27 17:55:00,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:00,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:00,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:00,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:00,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:00,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:00,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 788 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:00,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:00,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:00,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:00,713 INFO L124 PetriNetUnfolderBase]: 1598/2635 cut-off events. [2024-06-27 17:55:00,714 INFO L125 PetriNetUnfolderBase]: For 16079/16079 co-relation queries the response was YES. [2024-06-27 17:55:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10819 conditions, 2635 events. 1598/2635 cut-off events. For 16079/16079 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15375 event pairs, 656 based on Foata normal form. 2/2613 useless extension candidates. Maximal degree in co-relation 10778. Up to 2285 conditions per place. [2024-06-27 17:55:00,727 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 121 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-06-27 17:55:00,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1223 flow [2024-06-27 17:55:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:55:00,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:55:00,728 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 788 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:55:00,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1223 flow [2024-06-27 17:55:00,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1118 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:00,748 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 812 flow [2024-06-27 17:55:00,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=812, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2024-06-27 17:55:00,749 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-06-27 17:55:00,749 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 812 flow [2024-06-27 17:55:00,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:00,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:00,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:00,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:55:00,750 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:00,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:00,750 INFO L85 PathProgramCache]: Analyzing trace with hash 580999440, now seen corresponding path program 2 times [2024-06-27 17:55:00,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:00,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097541100] [2024-06-27 17:55:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:00,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:00,867 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 17:55:00,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:00,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097541100] [2024-06-27 17:55:00,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097541100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:00,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:00,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:00,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101983473] [2024-06-27 17:55:00,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:00,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:00,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 812 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:00,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:00,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:00,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:01,121 INFO L124 PetriNetUnfolderBase]: 1637/2726 cut-off events. [2024-06-27 17:55:01,122 INFO L125 PetriNetUnfolderBase]: For 18579/18582 co-relation queries the response was YES. [2024-06-27 17:55:01,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11446 conditions, 2726 events. 1637/2726 cut-off events. For 18579/18582 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15946 event pairs, 521 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 11403. Up to 2166 conditions per place. [2024-06-27 17:55:01,139 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 111 selfloop transitions, 40 changer transitions 0/165 dead transitions. [2024-06-27 17:55:01,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1426 flow [2024-06-27 17:55:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:55:01,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-06-27 17:55:01,141 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 812 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:55:01,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1426 flow [2024-06-27 17:55:01,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 165 transitions, 1380 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:01,161 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 983 flow [2024-06-27 17:55:01,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=983, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2024-06-27 17:55:01,162 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 60 predicate places. [2024-06-27 17:55:01,162 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 983 flow [2024-06-27 17:55:01,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:01,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:01,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:01,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:55:01,163 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:01,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash 581206830, now seen corresponding path program 3 times [2024-06-27 17:55:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:01,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481598092] [2024-06-27 17:55:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481598092] [2024-06-27 17:55:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481598092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:01,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796023160] [2024-06-27 17:55:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:01,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:01,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 983 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:01,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:01,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:01,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:01,521 INFO L124 PetriNetUnfolderBase]: 1632/2723 cut-off events. [2024-06-27 17:55:01,521 INFO L125 PetriNetUnfolderBase]: For 21372/21375 co-relation queries the response was YES. [2024-06-27 17:55:01,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 2723 events. 1632/2723 cut-off events. For 21372/21375 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15905 event pairs, 522 based on Foata normal form. 2/2717 useless extension candidates. Maximal degree in co-relation 12078. Up to 2161 conditions per place. [2024-06-27 17:55:01,538 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 108 selfloop transitions, 42 changer transitions 0/164 dead transitions. [2024-06-27 17:55:01,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 164 transitions, 1453 flow [2024-06-27 17:55:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:55:01,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-27 17:55:01,539 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 983 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:55:01,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 164 transitions, 1453 flow [2024-06-27 17:55:01,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 164 transitions, 1387 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:01,562 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1020 flow [2024-06-27 17:55:01,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1020, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-06-27 17:55:01,562 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 65 predicate places. [2024-06-27 17:55:01,562 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1020 flow [2024-06-27 17:55:01,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:01,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:01,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:01,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:55:01,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:01,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1253041234, now seen corresponding path program 1 times [2024-06-27 17:55:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:01,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155948839] [2024-06-27 17:55:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:01,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:01,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155948839] [2024-06-27 17:55:01,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155948839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:01,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:01,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:01,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659121892] [2024-06-27 17:55:01,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:01,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:01,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:01,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1020 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:01,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:01,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:01,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:01,982 INFO L124 PetriNetUnfolderBase]: 1659/2701 cut-off events. [2024-06-27 17:55:01,982 INFO L125 PetriNetUnfolderBase]: For 23351/23354 co-relation queries the response was YES. [2024-06-27 17:55:01,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12380 conditions, 2701 events. 1659/2701 cut-off events. For 23351/23354 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15666 event pairs, 460 based on Foata normal form. 4/2691 useless extension candidates. Maximal degree in co-relation 12332. Up to 2302 conditions per place. [2024-06-27 17:55:01,998 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 123 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2024-06-27 17:55:01,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 164 transitions, 1422 flow [2024-06-27 17:55:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:55:02,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:55:02,000 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1020 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:55:02,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 164 transitions, 1422 flow [2024-06-27 17:55:02,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 164 transitions, 1350 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:02,027 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1027 flow [2024-06-27 17:55:02,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1027, PETRI_PLACES=118, PETRI_TRANSITIONS=127} [2024-06-27 17:55:02,027 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-06-27 17:55:02,027 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1027 flow [2024-06-27 17:55:02,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:02,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:02,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:55:02,028 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:02,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -318689650, now seen corresponding path program 4 times [2024-06-27 17:55:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:02,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798212840] [2024-06-27 17:55:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:02,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:02,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:02,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798212840] [2024-06-27 17:55:02,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798212840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:02,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:02,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740110215] [2024-06-27 17:55:02,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:02,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:02,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:02,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:02,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:02,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 1027 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:02,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:02,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:02,436 INFO L124 PetriNetUnfolderBase]: 1676/2782 cut-off events. [2024-06-27 17:55:02,436 INFO L125 PetriNetUnfolderBase]: For 25308/25308 co-relation queries the response was YES. [2024-06-27 17:55:02,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12828 conditions, 2782 events. 1676/2782 cut-off events. For 25308/25308 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16513 event pairs, 640 based on Foata normal form. 2/2757 useless extension candidates. Maximal degree in co-relation 12779. Up to 2220 conditions per place. [2024-06-27 17:55:02,454 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 105 selfloop transitions, 48 changer transitions 0/167 dead transitions. [2024-06-27 17:55:02,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 167 transitions, 1538 flow [2024-06-27 17:55:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:55:02,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-27 17:55:02,455 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1027 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:55:02,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 167 transitions, 1538 flow [2024-06-27 17:55:02,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 1477 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:02,486 INFO L231 Difference]: Finished difference. Result has 121 places, 132 transitions, 1141 flow [2024-06-27 17:55:02,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1141, PETRI_PLACES=121, PETRI_TRANSITIONS=132} [2024-06-27 17:55:02,486 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-06-27 17:55:02,486 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 132 transitions, 1141 flow [2024-06-27 17:55:02,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:02,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:02,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:55:02,487 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:02,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2016473774, now seen corresponding path program 5 times [2024-06-27 17:55:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:02,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367941289] [2024-06-27 17:55:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:02,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:02,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:02,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367941289] [2024-06-27 17:55:02,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367941289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:02,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:02,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:02,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375175991] [2024-06-27 17:55:02,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:02,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:02,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:02,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:02,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:02,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:02,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 132 transitions, 1141 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:02,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:02,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:02,882 INFO L124 PetriNetUnfolderBase]: 1693/2729 cut-off events. [2024-06-27 17:55:02,882 INFO L125 PetriNetUnfolderBase]: For 27709/27709 co-relation queries the response was YES. [2024-06-27 17:55:02,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13212 conditions, 2729 events. 1693/2729 cut-off events. For 27709/27709 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15713 event pairs, 432 based on Foata normal form. 2/2721 useless extension candidates. Maximal degree in co-relation 13161. Up to 2238 conditions per place. [2024-06-27 17:55:02,902 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 108 selfloop transitions, 48 changer transitions 0/170 dead transitions. [2024-06-27 17:55:02,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1652 flow [2024-06-27 17:55:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:55:02,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:55:02,904 INFO L175 Difference]: Start difference. First operand has 121 places, 132 transitions, 1141 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:55:02,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1652 flow [2024-06-27 17:55:02,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 170 transitions, 1574 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:02,949 INFO L231 Difference]: Finished difference. Result has 125 places, 135 transitions, 1208 flow [2024-06-27 17:55:02,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1208, PETRI_PLACES=125, PETRI_TRANSITIONS=135} [2024-06-27 17:55:02,949 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-06-27 17:55:02,949 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 135 transitions, 1208 flow [2024-06-27 17:55:02,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:02,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:02,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:55:02,951 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:02,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:02,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2016681164, now seen corresponding path program 6 times [2024-06-27 17:55:02,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:02,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55418246] [2024-06-27 17:55:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:02,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55418246] [2024-06-27 17:55:03,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55418246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:03,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:03,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531442606] [2024-06-27 17:55:03,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:03,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:03,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:03,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:03,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 135 transitions, 1208 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:03,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:03,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:03,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:03,363 INFO L124 PetriNetUnfolderBase]: 1688/2841 cut-off events. [2024-06-27 17:55:03,363 INFO L125 PetriNetUnfolderBase]: For 30328/30328 co-relation queries the response was YES. [2024-06-27 17:55:03,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13350 conditions, 2841 events. 1688/2841 cut-off events. For 30328/30328 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16944 event pairs, 606 based on Foata normal form. 2/2824 useless extension candidates. Maximal degree in co-relation 13298. Up to 2233 conditions per place. [2024-06-27 17:55:03,382 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 105 selfloop transitions, 49 changer transitions 0/168 dead transitions. [2024-06-27 17:55:03,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 168 transitions, 1594 flow [2024-06-27 17:55:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:55:03,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:55:03,383 INFO L175 Difference]: Start difference. First operand has 125 places, 135 transitions, 1208 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:55:03,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 168 transitions, 1594 flow [2024-06-27 17:55:03,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 168 transitions, 1424 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:03,425 INFO L231 Difference]: Finished difference. Result has 126 places, 135 transitions, 1144 flow [2024-06-27 17:55:03,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1144, PETRI_PLACES=126, PETRI_TRANSITIONS=135} [2024-06-27 17:55:03,426 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-27 17:55:03,426 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 135 transitions, 1144 flow [2024-06-27 17:55:03,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:03,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:03,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:03,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:55:03,426 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:03,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2016465838, now seen corresponding path program 2 times [2024-06-27 17:55:03,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:03,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441512037] [2024-06-27 17:55:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:03,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:03,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:03,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441512037] [2024-06-27 17:55:03,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441512037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:03,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:03,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:03,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208922320] [2024-06-27 17:55:03,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:03,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:03,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:03,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 135 transitions, 1144 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:03,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:03,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:03,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:03,812 INFO L124 PetriNetUnfolderBase]: 1715/2764 cut-off events. [2024-06-27 17:55:03,812 INFO L125 PetriNetUnfolderBase]: For 31751/31751 co-relation queries the response was YES. [2024-06-27 17:55:03,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13334 conditions, 2764 events. 1715/2764 cut-off events. For 31751/31751 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15840 event pairs, 423 based on Foata normal form. 4/2761 useless extension candidates. Maximal degree in co-relation 13282. Up to 2384 conditions per place. [2024-06-27 17:55:03,884 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 130 selfloop transitions, 27 changer transitions 0/171 dead transitions. [2024-06-27 17:55:03,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1556 flow [2024-06-27 17:55:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:55:03,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:55:03,886 INFO L175 Difference]: Start difference. First operand has 126 places, 135 transitions, 1144 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:55:03,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1556 flow [2024-06-27 17:55:03,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 171 transitions, 1460 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:03,923 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 1131 flow [2024-06-27 17:55:03,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2024-06-27 17:55:03,924 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 78 predicate places. [2024-06-27 17:55:03,924 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 1131 flow [2024-06-27 17:55:03,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:03,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:03,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:03,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:55:03,925 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:03,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1750768558, now seen corresponding path program 3 times [2024-06-27 17:55:03,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:03,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130806006] [2024-06-27 17:55:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:03,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:04,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130806006] [2024-06-27 17:55:04,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130806006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:04,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:04,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399549097] [2024-06-27 17:55:04,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:04,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:04,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:04,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:04,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 1131 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:04,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:04,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:04,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:04,340 INFO L124 PetriNetUnfolderBase]: 1742/2902 cut-off events. [2024-06-27 17:55:04,341 INFO L125 PetriNetUnfolderBase]: For 35004/35004 co-relation queries the response was YES. [2024-06-27 17:55:04,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13809 conditions, 2902 events. 1742/2902 cut-off events. For 35004/35004 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17304 event pairs, 664 based on Foata normal form. 4/2880 useless extension candidates. Maximal degree in co-relation 13756. Up to 2425 conditions per place. [2024-06-27 17:55:04,357 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 131 selfloop transitions, 28 changer transitions 0/173 dead transitions. [2024-06-27 17:55:04,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 173 transitions, 1551 flow [2024-06-27 17:55:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:55:04,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 17:55:04,358 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 1131 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:55:04,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 173 transitions, 1551 flow [2024-06-27 17:55:04,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 173 transitions, 1486 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:04,402 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1155 flow [2024-06-27 17:55:04,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1155, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2024-06-27 17:55:04,402 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 80 predicate places. [2024-06-27 17:55:04,402 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1155 flow [2024-06-27 17:55:04,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:04,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:04,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:04,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:55:04,403 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:04,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:04,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1750442128, now seen corresponding path program 4 times [2024-06-27 17:55:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:04,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081573029] [2024-06-27 17:55:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:04,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:04,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:04,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081573029] [2024-06-27 17:55:04,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081573029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:04,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:04,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:04,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325159270] [2024-06-27 17:55:04,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:04,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:04,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:04,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:04,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:04,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:04,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1155 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:04,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:04,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:04,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:04,812 INFO L124 PetriNetUnfolderBase]: 1734/2879 cut-off events. [2024-06-27 17:55:04,812 INFO L125 PetriNetUnfolderBase]: For 37762/37762 co-relation queries the response was YES. [2024-06-27 17:55:04,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13903 conditions, 2879 events. 1734/2879 cut-off events. For 37762/37762 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17207 event pairs, 599 based on Foata normal form. 4/2856 useless extension candidates. Maximal degree in co-relation 13849. Up to 2302 conditions per place. [2024-06-27 17:55:04,828 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 127 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2024-06-27 17:55:04,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 1587 flow [2024-06-27 17:55:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:55:04,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:55:04,833 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1155 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:55:04,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 176 transitions, 1587 flow [2024-06-27 17:55:04,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 176 transitions, 1516 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:04,877 INFO L231 Difference]: Finished difference. Result has 132 places, 141 transitions, 1191 flow [2024-06-27 17:55:04,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=132, PETRI_TRANSITIONS=141} [2024-06-27 17:55:04,877 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-06-27 17:55:04,877 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 141 transitions, 1191 flow [2024-06-27 17:55:04,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:04,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:04,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:04,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:55:04,878 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:04,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1171278304, now seen corresponding path program 1 times [2024-06-27 17:55:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744973480] [2024-06-27 17:55:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:04,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:04,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744973480] [2024-06-27 17:55:04,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744973480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:04,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:04,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:04,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004340194] [2024-06-27 17:55:04,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:04,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:04,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:05,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:05,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 141 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:05,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:05,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:05,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:05,338 INFO L124 PetriNetUnfolderBase]: 1740/3011 cut-off events. [2024-06-27 17:55:05,338 INFO L125 PetriNetUnfolderBase]: For 45933/45987 co-relation queries the response was YES. [2024-06-27 17:55:05,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14722 conditions, 3011 events. 1740/3011 cut-off events. For 45933/45987 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18383 event pairs, 435 based on Foata normal form. 14/2935 useless extension candidates. Maximal degree in co-relation 14667. Up to 2298 conditions per place. [2024-06-27 17:55:05,356 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 128 selfloop transitions, 27 changer transitions 0/194 dead transitions. [2024-06-27 17:55:05,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 194 transitions, 1753 flow [2024-06-27 17:55:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-27 17:55:05,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:55:05,357 INFO L175 Difference]: Start difference. First operand has 132 places, 141 transitions, 1191 flow. Second operand 8 states and 244 transitions. [2024-06-27 17:55:05,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 194 transitions, 1753 flow [2024-06-27 17:55:05,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 194 transitions, 1664 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:05,400 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 1207 flow [2024-06-27 17:55:05,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1207, PETRI_PLACES=135, PETRI_TRANSITIONS=145} [2024-06-27 17:55:05,400 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-06-27 17:55:05,401 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 1207 flow [2024-06-27 17:55:05,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:05,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:05,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:05,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:55:05,401 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:05,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:05,402 INFO L85 PathProgramCache]: Analyzing trace with hash -98036612, now seen corresponding path program 2 times [2024-06-27 17:55:05,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:05,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667494889] [2024-06-27 17:55:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:05,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:05,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667494889] [2024-06-27 17:55:05,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667494889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:05,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:05,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:05,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266959886] [2024-06-27 17:55:05,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:05,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:05,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:05,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:05,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 1207 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:05,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:05,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:05,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:05,854 INFO L124 PetriNetUnfolderBase]: 1736/2969 cut-off events. [2024-06-27 17:55:05,854 INFO L125 PetriNetUnfolderBase]: For 47777/47824 co-relation queries the response was YES. [2024-06-27 17:55:05,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14781 conditions, 2969 events. 1736/2969 cut-off events. For 47777/47824 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18246 event pairs, 555 based on Foata normal form. 8/2886 useless extension candidates. Maximal degree in co-relation 14725. Up to 2378 conditions per place. [2024-06-27 17:55:05,874 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 123 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-06-27 17:55:05,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 185 transitions, 1595 flow [2024-06-27 17:55:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:55:05,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-27 17:55:05,875 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 1207 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:55:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 185 transitions, 1595 flow [2024-06-27 17:55:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 1538 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:05,927 INFO L231 Difference]: Finished difference. Result has 138 places, 145 transitions, 1204 flow [2024-06-27 17:55:05,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1204, PETRI_PLACES=138, PETRI_TRANSITIONS=145} [2024-06-27 17:55:05,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-06-27 17:55:05,927 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 145 transitions, 1204 flow [2024-06-27 17:55:05,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:05,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:05,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:05,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:55:05,928 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:05,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash 831109664, now seen corresponding path program 3 times [2024-06-27 17:55:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:05,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003659533] [2024-06-27 17:55:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:06,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:06,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003659533] [2024-06-27 17:55:06,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003659533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:06,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:06,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:06,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339516825] [2024-06-27 17:55:06,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:06,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:06,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:06,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:06,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 145 transitions, 1204 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:06,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:06,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:06,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:06,359 INFO L124 PetriNetUnfolderBase]: 1716/2814 cut-off events. [2024-06-27 17:55:06,359 INFO L125 PetriNetUnfolderBase]: For 50794/50841 co-relation queries the response was YES. [2024-06-27 17:55:06,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14648 conditions, 2814 events. 1716/2814 cut-off events. For 50794/50841 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16692 event pairs, 331 based on Foata normal form. 6/2725 useless extension candidates. Maximal degree in co-relation 14590. Up to 2255 conditions per place. [2024-06-27 17:55:06,377 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 103 selfloop transitions, 42 changer transitions 0/184 dead transitions. [2024-06-27 17:55:06,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 184 transitions, 1606 flow [2024-06-27 17:55:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:55:06,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 17:55:06,392 INFO L175 Difference]: Start difference. First operand has 138 places, 145 transitions, 1204 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:55:06,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 184 transitions, 1606 flow [2024-06-27 17:55:06,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 184 transitions, 1554 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:06,481 INFO L231 Difference]: Finished difference. Result has 139 places, 147 transitions, 1272 flow [2024-06-27 17:55:06,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1272, PETRI_PLACES=139, PETRI_TRANSITIONS=147} [2024-06-27 17:55:06,482 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 89 predicate places. [2024-06-27 17:55:06,482 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 147 transitions, 1272 flow [2024-06-27 17:55:06,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:06,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:06,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:06,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:55:06,484 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 17:55:06,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash -469156962, now seen corresponding path program 1 times [2024-06-27 17:55:06,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:06,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050767876] [2024-06-27 17:55:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:06,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:06,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050767876] [2024-06-27 17:55:06,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050767876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:06,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:06,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565149781] [2024-06-27 17:55:06,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:06,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:06,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:06,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 147 transitions, 1272 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:06,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:06,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:06,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:06,968 INFO L124 PetriNetUnfolderBase]: 1801/3044 cut-off events. [2024-06-27 17:55:06,968 INFO L125 PetriNetUnfolderBase]: For 49519/49533 co-relation queries the response was YES. [2024-06-27 17:55:06,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15366 conditions, 3044 events. 1801/3044 cut-off events. For 49519/49533 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18712 event pairs, 671 based on Foata normal form. 14/3029 useless extension candidates. Maximal degree in co-relation 15307. Up to 2469 conditions per place. [2024-06-27 17:55:06,989 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 128 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-06-27 17:55:06,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 183 transitions, 1796 flow [2024-06-27 17:55:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:55:06,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:06,990 INFO L175 Difference]: Start difference. First operand has 139 places, 147 transitions, 1272 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:55:06,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 183 transitions, 1796 flow [2024-06-27 17:55:07,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 183 transitions, 1686 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:07,045 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1342 flow [2024-06-27 17:55:07,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1342, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2024-06-27 17:55:07,045 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-06-27 17:55:07,046 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1342 flow [2024-06-27 17:55:07,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:07,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:07,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:07,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:55:07,046 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:07,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1907389564, now seen corresponding path program 4 times [2024-06-27 17:55:07,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:07,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031687673] [2024-06-27 17:55:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:07,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:07,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:07,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031687673] [2024-06-27 17:55:07,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031687673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:07,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:07,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292405475] [2024-06-27 17:55:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:07,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:07,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:07,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:07,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:07,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:07,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:07,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:07,506 INFO L124 PetriNetUnfolderBase]: 1748/2869 cut-off events. [2024-06-27 17:55:07,507 INFO L125 PetriNetUnfolderBase]: For 56233/56290 co-relation queries the response was YES. [2024-06-27 17:55:07,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15352 conditions, 2869 events. 1748/2869 cut-off events. For 56233/56290 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17105 event pairs, 343 based on Foata normal form. 16/2784 useless extension candidates. Maximal degree in co-relation 15291. Up to 2281 conditions per place. [2024-06-27 17:55:07,526 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 108 selfloop transitions, 47 changer transitions 0/194 dead transitions. [2024-06-27 17:55:07,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 1760 flow [2024-06-27 17:55:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:55:07,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:55:07,528 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1342 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:55:07,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 1760 flow [2024-06-27 17:55:07,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 194 transitions, 1728 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:07,597 INFO L231 Difference]: Finished difference. Result has 147 places, 160 transitions, 1444 flow [2024-06-27 17:55:07,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1444, PETRI_PLACES=147, PETRI_TRANSITIONS=160} [2024-06-27 17:55:07,597 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-06-27 17:55:07,597 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 160 transitions, 1444 flow [2024-06-27 17:55:07,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:07,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:07,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:55:07,598 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 17:55:07,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash -84926532, now seen corresponding path program 2 times [2024-06-27 17:55:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331279839] [2024-06-27 17:55:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:07,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331279839] [2024-06-27 17:55:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331279839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:07,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:07,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:07,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753549005] [2024-06-27 17:55:07,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:07,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:07,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 160 transitions, 1444 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:07,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:07,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:07,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:08,054 INFO L124 PetriNetUnfolderBase]: 1799/3071 cut-off events. [2024-06-27 17:55:08,055 INFO L125 PetriNetUnfolderBase]: For 53911/53922 co-relation queries the response was YES. [2024-06-27 17:55:08,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15867 conditions, 3071 events. 1799/3071 cut-off events. For 53911/53922 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18717 event pairs, 497 based on Foata normal form. 11/3077 useless extension candidates. Maximal degree in co-relation 15804. Up to 2492 conditions per place. [2024-06-27 17:55:08,079 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 129 selfloop transitions, 24 changer transitions 0/181 dead transitions. [2024-06-27 17:55:08,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 181 transitions, 1826 flow [2024-06-27 17:55:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-27 17:55:08,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-27 17:55:08,081 INFO L175 Difference]: Start difference. First operand has 147 places, 160 transitions, 1444 flow. Second operand 4 states and 129 transitions. [2024-06-27 17:55:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 181 transitions, 1826 flow [2024-06-27 17:55:08,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 181 transitions, 1712 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:08,172 INFO L231 Difference]: Finished difference. Result has 146 places, 163 transitions, 1437 flow [2024-06-27 17:55:08,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1437, PETRI_PLACES=146, PETRI_TRANSITIONS=163} [2024-06-27 17:55:08,172 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-06-27 17:55:08,173 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 163 transitions, 1437 flow [2024-06-27 17:55:08,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:08,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:08,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:08,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:55:08,173 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:08,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash -589425156, now seen corresponding path program 3 times [2024-06-27 17:55:08,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:08,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813460114] [2024-06-27 17:55:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:08,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:08,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813460114] [2024-06-27 17:55:08,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813460114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:08,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:08,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:08,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924394032] [2024-06-27 17:55:08,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:08,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:08,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:08,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:08,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:08,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 163 transitions, 1437 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:08,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:08,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:08,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:08,547 INFO L124 PetriNetUnfolderBase]: 1795/2974 cut-off events. [2024-06-27 17:55:08,547 INFO L125 PetriNetUnfolderBase]: For 54696/54696 co-relation queries the response was YES. [2024-06-27 17:55:08,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15607 conditions, 2974 events. 1795/2974 cut-off events. For 54696/54696 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17851 event pairs, 392 based on Foata normal form. 2/2972 useless extension candidates. Maximal degree in co-relation 15543. Up to 2457 conditions per place. [2024-06-27 17:55:08,566 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 126 selfloop transitions, 30 changer transitions 0/184 dead transitions. [2024-06-27 17:55:08,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 184 transitions, 1799 flow [2024-06-27 17:55:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 17:55:08,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-06-27 17:55:08,568 INFO L175 Difference]: Start difference. First operand has 146 places, 163 transitions, 1437 flow. Second operand 5 states and 154 transitions. [2024-06-27 17:55:08,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 184 transitions, 1799 flow [2024-06-27 17:55:08,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 184 transitions, 1746 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:08,632 INFO L231 Difference]: Finished difference. Result has 149 places, 163 transitions, 1456 flow [2024-06-27 17:55:08,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1456, PETRI_PLACES=149, PETRI_TRANSITIONS=163} [2024-06-27 17:55:08,632 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 99 predicate places. [2024-06-27 17:55:08,632 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 163 transitions, 1456 flow [2024-06-27 17:55:08,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:08,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:08,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:55:08,633 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 17:55:08,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash -262408414, now seen corresponding path program 1 times [2024-06-27 17:55:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:08,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252275967] [2024-06-27 17:55:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:08,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252275967] [2024-06-27 17:55:08,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252275967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:08,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:08,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760721209] [2024-06-27 17:55:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:08,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:08,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:08,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 163 transitions, 1456 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:08,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:08,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:08,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:09,035 INFO L124 PetriNetUnfolderBase]: 1774/3073 cut-off events. [2024-06-27 17:55:09,035 INFO L125 PetriNetUnfolderBase]: For 59996/60000 co-relation queries the response was YES. [2024-06-27 17:55:09,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16030 conditions, 3073 events. 1774/3073 cut-off events. For 59996/60000 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19292 event pairs, 582 based on Foata normal form. 6/3047 useless extension candidates. Maximal degree in co-relation 15965. Up to 2448 conditions per place. [2024-06-27 17:55:09,053 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 139 selfloop transitions, 24 changer transitions 0/194 dead transitions. [2024-06-27 17:55:09,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 194 transitions, 1958 flow [2024-06-27 17:55:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:55:09,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:55:09,054 INFO L175 Difference]: Start difference. First operand has 149 places, 163 transitions, 1456 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:55:09,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 194 transitions, 1958 flow [2024-06-27 17:55:09,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 194 transitions, 1885 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:09,135 INFO L231 Difference]: Finished difference. Result has 151 places, 169 transitions, 1501 flow [2024-06-27 17:55:09,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1501, PETRI_PLACES=151, PETRI_TRANSITIONS=169} [2024-06-27 17:55:09,135 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 101 predicate places. [2024-06-27 17:55:09,135 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 169 transitions, 1501 flow [2024-06-27 17:55:09,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:09,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:09,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:09,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:55:09,136 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 17:55:09,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash -91586014, now seen corresponding path program 2 times [2024-06-27 17:55:09,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:09,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878187947] [2024-06-27 17:55:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:09,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:09,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878187947] [2024-06-27 17:55:09,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878187947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:09,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:09,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:09,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266312708] [2024-06-27 17:55:09,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:09,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:09,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:09,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 169 transitions, 1501 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:09,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:09,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:09,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:09,542 INFO L124 PetriNetUnfolderBase]: 1816/3141 cut-off events. [2024-06-27 17:55:09,542 INFO L125 PetriNetUnfolderBase]: For 60875/60879 co-relation queries the response was YES. [2024-06-27 17:55:09,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16513 conditions, 3141 events. 1816/3141 cut-off events. For 60875/60879 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19783 event pairs, 587 based on Foata normal form. 6/3116 useless extension candidates. Maximal degree in co-relation 16448. Up to 2516 conditions per place. [2024-06-27 17:55:09,562 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 143 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-27 17:55:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 198 transitions, 1965 flow [2024-06-27 17:55:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:55:09,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:55:09,563 INFO L175 Difference]: Start difference. First operand has 151 places, 169 transitions, 1501 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:55:09,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 198 transitions, 1965 flow [2024-06-27 17:55:09,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 198 transitions, 1916 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:09,652 INFO L231 Difference]: Finished difference. Result has 155 places, 177 transitions, 1595 flow [2024-06-27 17:55:09,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1595, PETRI_PLACES=155, PETRI_TRANSITIONS=177} [2024-06-27 17:55:09,653 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 105 predicate places. [2024-06-27 17:55:09,653 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 177 transitions, 1595 flow [2024-06-27 17:55:09,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:09,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:09,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:55:09,654 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 17:55:09,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash -589210078, now seen corresponding path program 3 times [2024-06-27 17:55:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:09,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039987550] [2024-06-27 17:55:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:09,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:09,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039987550] [2024-06-27 17:55:09,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039987550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:09,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:09,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753770330] [2024-06-27 17:55:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:09,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:09,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:09,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 177 transitions, 1595 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:09,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:09,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:09,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:10,057 INFO L124 PetriNetUnfolderBase]: 1812/3023 cut-off events. [2024-06-27 17:55:10,057 INFO L125 PetriNetUnfolderBase]: For 62366/62366 co-relation queries the response was YES. [2024-06-27 17:55:10,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16503 conditions, 3023 events. 1812/3023 cut-off events. For 62366/62366 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18336 event pairs, 339 based on Foata normal form. 2/3020 useless extension candidates. Maximal degree in co-relation 16436. Up to 2482 conditions per place. [2024-06-27 17:55:10,078 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 138 selfloop transitions, 29 changer transitions 0/198 dead transitions. [2024-06-27 17:55:10,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 198 transitions, 1979 flow [2024-06-27 17:55:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:55:10,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-27 17:55:10,079 INFO L175 Difference]: Start difference. First operand has 155 places, 177 transitions, 1595 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:55:10,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 198 transitions, 1979 flow [2024-06-27 17:55:10,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 198 transitions, 1902 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:10,159 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1592 flow [2024-06-27 17:55:10,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1592, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-27 17:55:10,160 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 17:55:10,160 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1592 flow [2024-06-27 17:55:10,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:10,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:10,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:10,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:55:10,160 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 17:55:10,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash -588963814, now seen corresponding path program 1 times [2024-06-27 17:55:10,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:10,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378697417] [2024-06-27 17:55:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:10,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:10,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:10,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378697417] [2024-06-27 17:55:10,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378697417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:10,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:10,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:10,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347975212] [2024-06-27 17:55:10,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:10,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:10,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:10,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:10,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1592 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:10,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:10,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:10,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:10,562 INFO L124 PetriNetUnfolderBase]: 1850/3069 cut-off events. [2024-06-27 17:55:10,562 INFO L125 PetriNetUnfolderBase]: For 62779/62779 co-relation queries the response was YES. [2024-06-27 17:55:10,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 3069 events. 1850/3069 cut-off events. For 62779/62779 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18569 event pairs, 389 based on Foata normal form. 2/3063 useless extension candidates. Maximal degree in co-relation 16439. Up to 2593 conditions per place. [2024-06-27 17:55:10,583 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 154 selfloop transitions, 10 changer transitions 0/192 dead transitions. [2024-06-27 17:55:10,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 192 transitions, 1972 flow [2024-06-27 17:55:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 17:55:10,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:55:10,584 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1592 flow. Second operand 4 states and 121 transitions. [2024-06-27 17:55:10,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 192 transitions, 1972 flow [2024-06-27 17:55:10,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 192 transitions, 1912 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:10,669 INFO L231 Difference]: Finished difference. Result has 157 places, 179 transitions, 1583 flow [2024-06-27 17:55:10,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1583, PETRI_PLACES=157, PETRI_TRANSITIONS=179} [2024-06-27 17:55:10,670 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 17:55:10,670 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 179 transitions, 1583 flow [2024-06-27 17:55:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:10,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:10,671 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 17:55:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:55:10,671 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash -212873647, now seen corresponding path program 1 times [2024-06-27 17:55:10,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:10,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907236941] [2024-06-27 17:55:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:10,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:10,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907236941] [2024-06-27 17:55:10,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907236941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:10,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:10,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:10,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603980422] [2024-06-27 17:55:10,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:10,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:10,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:10,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:10,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 179 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:10,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:10,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:10,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:11,342 INFO L124 PetriNetUnfolderBase]: 2160/3563 cut-off events. [2024-06-27 17:55:11,343 INFO L125 PetriNetUnfolderBase]: For 79230/79230 co-relation queries the response was YES. [2024-06-27 17:55:11,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19136 conditions, 3563 events. 2160/3563 cut-off events. For 79230/79230 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21944 event pairs, 535 based on Foata normal form. 12/3544 useless extension candidates. Maximal degree in co-relation 19067. Up to 2749 conditions per place. [2024-06-27 17:55:11,371 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 212 selfloop transitions, 20 changer transitions 0/246 dead transitions. [2024-06-27 17:55:11,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 246 transitions, 2407 flow [2024-06-27 17:55:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:55:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:55:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-06-27 17:55:11,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497584541062802 [2024-06-27 17:55:11,373 INFO L175 Difference]: Start difference. First operand has 157 places, 179 transitions, 1583 flow. Second operand 9 states and 269 transitions. [2024-06-27 17:55:11,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 246 transitions, 2407 flow [2024-06-27 17:55:11,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 246 transitions, 2372 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:11,474 INFO L231 Difference]: Finished difference. Result has 166 places, 184 transitions, 1668 flow [2024-06-27 17:55:11,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1668, PETRI_PLACES=166, PETRI_TRANSITIONS=184} [2024-06-27 17:55:11,474 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-06-27 17:55:11,474 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 184 transitions, 1668 flow [2024-06-27 17:55:11,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:11,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:11,475 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 17:55:11,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:55:11,475 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:11,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash -124160017, now seen corresponding path program 2 times [2024-06-27 17:55:11,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:11,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158905789] [2024-06-27 17:55:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:11,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158905789] [2024-06-27 17:55:11,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158905789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:11,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:11,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794573810] [2024-06-27 17:55:11,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:11,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:11,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 184 transitions, 1668 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:11,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:11,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:12,185 INFO L124 PetriNetUnfolderBase]: 2219/3688 cut-off events. [2024-06-27 17:55:12,185 INFO L125 PetriNetUnfolderBase]: For 84168/84168 co-relation queries the response was YES. [2024-06-27 17:55:12,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19880 conditions, 3688 events. 2219/3688 cut-off events. For 84168/84168 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22988 event pairs, 748 based on Foata normal form. 16/3671 useless extension candidates. Maximal degree in co-relation 19808. Up to 3092 conditions per place. [2024-06-27 17:55:12,210 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 203 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-27 17:55:12,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 234 transitions, 2265 flow [2024-06-27 17:55:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:55:12,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:55:12,212 INFO L175 Difference]: Start difference. First operand has 166 places, 184 transitions, 1668 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:55:12,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 234 transitions, 2265 flow [2024-06-27 17:55:12,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 234 transitions, 2223 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:12,321 INFO L231 Difference]: Finished difference. Result has 170 places, 185 transitions, 1688 flow [2024-06-27 17:55:12,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1688, PETRI_PLACES=170, PETRI_TRANSITIONS=185} [2024-06-27 17:55:12,322 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2024-06-27 17:55:12,322 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 185 transitions, 1688 flow [2024-06-27 17:55:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:12,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:12,323 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 17:55:12,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:55:12,323 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:12,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1255833461, now seen corresponding path program 3 times [2024-06-27 17:55:12,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:12,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365877145] [2024-06-27 17:55:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:12,466 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 17:55:12,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:12,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365877145] [2024-06-27 17:55:12,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365877145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:12,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:12,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:12,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836482900] [2024-06-27 17:55:12,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:12,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:12,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:12,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:12,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 185 transitions, 1688 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:12,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:12,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:12,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:12,927 INFO L124 PetriNetUnfolderBase]: 2199/3654 cut-off events. [2024-06-27 17:55:12,928 INFO L125 PetriNetUnfolderBase]: For 80181/80181 co-relation queries the response was YES. [2024-06-27 17:55:12,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19462 conditions, 3654 events. 2199/3654 cut-off events. For 80181/80181 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22689 event pairs, 693 based on Foata normal form. 12/3637 useless extension candidates. Maximal degree in co-relation 19388. Up to 2935 conditions per place. [2024-06-27 17:55:12,957 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 207 selfloop transitions, 19 changer transitions 0/240 dead transitions. [2024-06-27 17:55:12,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 2341 flow [2024-06-27 17:55:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:55:12,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-27 17:55:12,958 INFO L175 Difference]: Start difference. First operand has 170 places, 185 transitions, 1688 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:55:12,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 2341 flow [2024-06-27 17:55:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 240 transitions, 2270 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:13,102 INFO L231 Difference]: Finished difference. Result has 173 places, 188 transitions, 1718 flow [2024-06-27 17:55:13,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1718, PETRI_PLACES=173, PETRI_TRANSITIONS=188} [2024-06-27 17:55:13,102 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2024-06-27 17:55:13,102 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 188 transitions, 1718 flow [2024-06-27 17:55:13,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:13,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:13,103 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 17:55:13,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:55:13,103 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:13,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1374886163, now seen corresponding path program 4 times [2024-06-27 17:55:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:13,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366346007] [2024-06-27 17:55:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:13,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:13,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366346007] [2024-06-27 17:55:13,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366346007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:13,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:13,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:13,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006950393] [2024-06-27 17:55:13,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:13,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:13,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:13,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:13,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 188 transitions, 1718 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:13,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:13,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:13,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:13,702 INFO L124 PetriNetUnfolderBase]: 2293/3766 cut-off events. [2024-06-27 17:55:13,702 INFO L125 PetriNetUnfolderBase]: For 86243/86246 co-relation queries the response was YES. [2024-06-27 17:55:13,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20037 conditions, 3766 events. 2293/3766 cut-off events. For 86243/86246 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23451 event pairs, 517 based on Foata normal form. 16/3764 useless extension candidates. Maximal degree in co-relation 19961. Up to 3028 conditions per place. [2024-06-27 17:55:13,786 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 172 selfloop transitions, 49 changer transitions 0/235 dead transitions. [2024-06-27 17:55:13,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 235 transitions, 2308 flow [2024-06-27 17:55:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 17:55:13,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-06-27 17:55:13,787 INFO L175 Difference]: Start difference. First operand has 173 places, 188 transitions, 1718 flow. Second operand 8 states and 241 transitions. [2024-06-27 17:55:13,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 235 transitions, 2308 flow [2024-06-27 17:55:13,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 235 transitions, 2288 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:13,897 INFO L231 Difference]: Finished difference. Result has 177 places, 189 transitions, 1823 flow [2024-06-27 17:55:13,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1823, PETRI_PLACES=177, PETRI_TRANSITIONS=189} [2024-06-27 17:55:13,897 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2024-06-27 17:55:13,897 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 189 transitions, 1823 flow [2024-06-27 17:55:13,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:13,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:13,898 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 17:55:13,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:55:13,898 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:13,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:13,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1374738293, now seen corresponding path program 5 times [2024-06-27 17:55:13,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:13,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426312811] [2024-06-27 17:55:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:13,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:14,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426312811] [2024-06-27 17:55:14,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426312811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:14,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:14,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:14,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810632370] [2024-06-27 17:55:14,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:14,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:14,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:14,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 189 transitions, 1823 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:14,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:14,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:14,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:14,650 INFO L124 PetriNetUnfolderBase]: 2482/4207 cut-off events. [2024-06-27 17:55:14,650 INFO L125 PetriNetUnfolderBase]: For 101204/101207 co-relation queries the response was YES. [2024-06-27 17:55:14,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22652 conditions, 4207 events. 2482/4207 cut-off events. For 101204/101207 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27458 event pairs, 767 based on Foata normal form. 12/4177 useless extension candidates. Maximal degree in co-relation 22574. Up to 3038 conditions per place. [2024-06-27 17:55:14,687 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 178 selfloop transitions, 51 changer transitions 0/243 dead transitions. [2024-06-27 17:55:14,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 243 transitions, 2613 flow [2024-06-27 17:55:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 17:55:14,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6657608695652174 [2024-06-27 17:55:14,689 INFO L175 Difference]: Start difference. First operand has 177 places, 189 transitions, 1823 flow. Second operand 8 states and 245 transitions. [2024-06-27 17:55:14,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 243 transitions, 2613 flow [2024-06-27 17:55:14,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 243 transitions, 2506 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:14,875 INFO L231 Difference]: Finished difference. Result has 180 places, 192 transitions, 1880 flow [2024-06-27 17:55:14,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1880, PETRI_PLACES=180, PETRI_TRANSITIONS=192} [2024-06-27 17:55:14,876 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-27 17:55:14,876 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 192 transitions, 1880 flow [2024-06-27 17:55:14,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:14,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:14,876 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 17:55:14,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:55:14,877 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:14,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1574187953, now seen corresponding path program 6 times [2024-06-27 17:55:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:14,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039282743] [2024-06-27 17:55:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:14,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039282743] [2024-06-27 17:55:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039282743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:14,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660310883] [2024-06-27 17:55:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:14,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:15,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:15,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 192 transitions, 1880 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:15,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:15,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:15,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:15,508 INFO L124 PetriNetUnfolderBase]: 2454/4142 cut-off events. [2024-06-27 17:55:15,508 INFO L125 PetriNetUnfolderBase]: For 98147/98150 co-relation queries the response was YES. [2024-06-27 17:55:15,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22034 conditions, 4142 events. 2454/4142 cut-off events. For 98147/98150 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26611 event pairs, 614 based on Foata normal form. 16/4149 useless extension candidates. Maximal degree in co-relation 21954. Up to 3287 conditions per place. [2024-06-27 17:55:15,539 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 175 selfloop transitions, 50 changer transitions 0/239 dead transitions. [2024-06-27 17:55:15,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 239 transitions, 2483 flow [2024-06-27 17:55:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 17:55:15,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:15,540 INFO L175 Difference]: Start difference. First operand has 180 places, 192 transitions, 1880 flow. Second operand 8 states and 240 transitions. [2024-06-27 17:55:15,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 239 transitions, 2483 flow [2024-06-27 17:55:15,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 239 transitions, 2391 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:15,720 INFO L231 Difference]: Finished difference. Result has 184 places, 193 transitions, 1920 flow [2024-06-27 17:55:15,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1920, PETRI_PLACES=184, PETRI_TRANSITIONS=193} [2024-06-27 17:55:15,720 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 134 predicate places. [2024-06-27 17:55:15,720 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 193 transitions, 1920 flow [2024-06-27 17:55:15,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:15,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:15,721 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 17:55:15,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:55:15,721 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:15,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash 322397, now seen corresponding path program 1 times [2024-06-27 17:55:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:15,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945620944] [2024-06-27 17:55:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:15,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:15,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945620944] [2024-06-27 17:55:15,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945620944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:15,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:15,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718110986] [2024-06-27 17:55:15,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:15,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:15,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:15,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 193 transitions, 1920 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:15,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:15,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:15,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:16,373 INFO L124 PetriNetUnfolderBase]: 2521/4247 cut-off events. [2024-06-27 17:55:16,373 INFO L125 PetriNetUnfolderBase]: For 98713/98716 co-relation queries the response was YES. [2024-06-27 17:55:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22581 conditions, 4247 events. 2521/4247 cut-off events. For 98713/98716 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27384 event pairs, 591 based on Foata normal form. 12/4250 useless extension candidates. Maximal degree in co-relation 22499. Up to 3007 conditions per place. [2024-06-27 17:55:16,406 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 175 selfloop transitions, 54 changer transitions 0/243 dead transitions. [2024-06-27 17:55:16,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 243 transitions, 2548 flow [2024-06-27 17:55:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-27 17:55:16,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:55:16,408 INFO L175 Difference]: Start difference. First operand has 184 places, 193 transitions, 1920 flow. Second operand 8 states and 242 transitions. [2024-06-27 17:55:16,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 243 transitions, 2548 flow [2024-06-27 17:55:16,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 243 transitions, 2449 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:16,587 INFO L231 Difference]: Finished difference. Result has 186 places, 194 transitions, 1959 flow [2024-06-27 17:55:16,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1959, PETRI_PLACES=186, PETRI_TRANSITIONS=194} [2024-06-27 17:55:16,588 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 136 predicate places. [2024-06-27 17:55:16,588 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 194 transitions, 1959 flow [2024-06-27 17:55:16,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:16,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:16,589 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 17:55:16,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:55:16,589 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:16,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1318044179, now seen corresponding path program 7 times [2024-06-27 17:55:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422042568] [2024-06-27 17:55:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:16,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:16,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422042568] [2024-06-27 17:55:16,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422042568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:16,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:16,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967230809] [2024-06-27 17:55:16,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:16,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:16,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:16,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:16,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 194 transitions, 1959 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:16,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:16,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:16,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:17,219 INFO L124 PetriNetUnfolderBase]: 2615/4270 cut-off events. [2024-06-27 17:55:17,220 INFO L125 PetriNetUnfolderBase]: For 107982/107982 co-relation queries the response was YES. [2024-06-27 17:55:17,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23532 conditions, 4270 events. 2615/4270 cut-off events. For 107982/107982 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27144 event pairs, 517 based on Foata normal form. 16/4276 useless extension candidates. Maximal degree in co-relation 23449. Up to 3546 conditions per place. [2024-06-27 17:55:17,257 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 172 selfloop transitions, 52 changer transitions 0/238 dead transitions. [2024-06-27 17:55:17,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 238 transitions, 2553 flow [2024-06-27 17:55:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:55:17,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:55:17,259 INFO L175 Difference]: Start difference. First operand has 186 places, 194 transitions, 1959 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:55:17,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 238 transitions, 2553 flow [2024-06-27 17:55:17,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 238 transitions, 2429 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:17,440 INFO L231 Difference]: Finished difference. Result has 188 places, 195 transitions, 1972 flow [2024-06-27 17:55:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1972, PETRI_PLACES=188, PETRI_TRANSITIONS=195} [2024-06-27 17:55:17,441 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 138 predicate places. [2024-06-27 17:55:17,441 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 195 transitions, 1972 flow [2024-06-27 17:55:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:17,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:17,441 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 17:55:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:55:17,441 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:17,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2059473579, now seen corresponding path program 8 times [2024-06-27 17:55:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135117944] [2024-06-27 17:55:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:17,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135117944] [2024-06-27 17:55:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135117944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:17,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:17,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026634516] [2024-06-27 17:55:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:17,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:17,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 195 transitions, 1972 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:17,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:17,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:17,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:18,158 INFO L124 PetriNetUnfolderBase]: 2709/4420 cut-off events. [2024-06-27 17:55:18,159 INFO L125 PetriNetUnfolderBase]: For 114131/114131 co-relation queries the response was YES. [2024-06-27 17:55:18,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24271 conditions, 4420 events. 2709/4420 cut-off events. For 114131/114131 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28301 event pairs, 531 based on Foata normal form. 16/4426 useless extension candidates. Maximal degree in co-relation 24187. Up to 3696 conditions per place. [2024-06-27 17:55:18,188 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 49 changer transitions 0/239 dead transitions. [2024-06-27 17:55:18,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 239 transitions, 2570 flow [2024-06-27 17:55:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:55:18,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 17:55:18,190 INFO L175 Difference]: Start difference. First operand has 188 places, 195 transitions, 1972 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:55:18,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 239 transitions, 2570 flow [2024-06-27 17:55:18,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 239 transitions, 2451 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:18,412 INFO L231 Difference]: Finished difference. Result has 190 places, 196 transitions, 1986 flow [2024-06-27 17:55:18,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=190, PETRI_TRANSITIONS=196} [2024-06-27 17:55:18,413 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2024-06-27 17:55:18,413 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 196 transitions, 1986 flow [2024-06-27 17:55:18,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:18,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:18,413 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 17:55:18,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:55:18,413 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:18,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1000316653, now seen corresponding path program 9 times [2024-06-27 17:55:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:18,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048030368] [2024-06-27 17:55:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:18,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:18,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048030368] [2024-06-27 17:55:18,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048030368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:18,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:18,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821115211] [2024-06-27 17:55:18,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:18,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:18,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:18,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 196 transitions, 1986 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:18,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:18,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:18,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:19,133 INFO L124 PetriNetUnfolderBase]: 2803/4792 cut-off events. [2024-06-27 17:55:19,134 INFO L125 PetriNetUnfolderBase]: For 122250/122250 co-relation queries the response was YES. [2024-06-27 17:55:19,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25263 conditions, 4792 events. 2803/4792 cut-off events. For 122250/122250 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32351 event pairs, 931 based on Foata normal form. 16/4747 useless extension candidates. Maximal degree in co-relation 25178. Up to 3846 conditions per place. [2024-06-27 17:55:19,176 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-06-27 17:55:19,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 240 transitions, 2588 flow [2024-06-27 17:55:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:55:19,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:55:19,180 INFO L175 Difference]: Start difference. First operand has 190 places, 196 transitions, 1986 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:55:19,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 240 transitions, 2588 flow [2024-06-27 17:55:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 240 transitions, 2473 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:19,402 INFO L231 Difference]: Finished difference. Result has 192 places, 197 transitions, 2008 flow [2024-06-27 17:55:19,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2008, PETRI_PLACES=192, PETRI_TRANSITIONS=197} [2024-06-27 17:55:19,403 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 142 predicate places. [2024-06-27 17:55:19,403 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 197 transitions, 2008 flow [2024-06-27 17:55:19,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:19,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:19,404 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 17:55:19,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:55:19,404 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:19,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:19,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1000464523, now seen corresponding path program 10 times [2024-06-27 17:55:19,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:19,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226640015] [2024-06-27 17:55:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:19,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:19,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226640015] [2024-06-27 17:55:19,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226640015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:19,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:19,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:19,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454850177] [2024-06-27 17:55:19,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:19,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:19,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:19,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:19,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 197 transitions, 2008 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:19,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:19,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:19,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:20,197 INFO L124 PetriNetUnfolderBase]: 2835/4814 cut-off events. [2024-06-27 17:55:20,197 INFO L125 PetriNetUnfolderBase]: For 119690/119690 co-relation queries the response was YES. [2024-06-27 17:55:20,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 4814 events. 2835/4814 cut-off events. For 119690/119690 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 32451 event pairs, 885 based on Foata normal form. 12/4773 useless extension candidates. Maximal degree in co-relation 25157. Up to 3513 conditions per place. [2024-06-27 17:55:20,237 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 178 selfloop transitions, 54 changer transitions 0/246 dead transitions. [2024-06-27 17:55:20,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 2674 flow [2024-06-27 17:55:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:55:20,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-27 17:55:20,239 INFO L175 Difference]: Start difference. First operand has 192 places, 197 transitions, 2008 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:55:20,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 2674 flow [2024-06-27 17:55:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 246 transitions, 2555 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:20,561 INFO L231 Difference]: Finished difference. Result has 195 places, 200 transitions, 2083 flow [2024-06-27 17:55:20,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2083, PETRI_PLACES=195, PETRI_TRANSITIONS=200} [2024-06-27 17:55:20,562 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-06-27 17:55:20,563 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 200 transitions, 2083 flow [2024-06-27 17:55:20,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:20,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:20,563 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 17:55:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:55:20,563 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:20,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1138625265, now seen corresponding path program 2 times [2024-06-27 17:55:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:20,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63460383] [2024-06-27 17:55:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:20,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:20,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:20,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63460383] [2024-06-27 17:55:20,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63460383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:20,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:20,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:20,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281831775] [2024-06-27 17:55:20,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:20,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:20,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:20,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:20,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:20,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:20,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 200 transitions, 2083 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:20,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:20,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:20,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:21,306 INFO L124 PetriNetUnfolderBase]: 2902/4968 cut-off events. [2024-06-27 17:55:21,306 INFO L125 PetriNetUnfolderBase]: For 125920/125920 co-relation queries the response was YES. [2024-06-27 17:55:21,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 4968 events. 2902/4968 cut-off events. For 125920/125920 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33548 event pairs, 690 based on Foata normal form. 12/4967 useless extension candidates. Maximal degree in co-relation 25915. Up to 3886 conditions per place. [2024-06-27 17:55:21,350 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 179 selfloop transitions, 54 changer transitions 0/247 dead transitions. [2024-06-27 17:55:21,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 247 transitions, 2721 flow [2024-06-27 17:55:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:55:21,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-27 17:55:21,352 INFO L175 Difference]: Start difference. First operand has 195 places, 200 transitions, 2083 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:55:21,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 247 transitions, 2721 flow [2024-06-27 17:55:21,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 247 transitions, 2623 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:21,661 INFO L231 Difference]: Finished difference. Result has 199 places, 201 transitions, 2133 flow [2024-06-27 17:55:21,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2133, PETRI_PLACES=199, PETRI_TRANSITIONS=201} [2024-06-27 17:55:21,662 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 149 predicate places. [2024-06-27 17:55:21,662 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 201 transitions, 2133 flow [2024-06-27 17:55:21,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:21,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:21,663 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 17:55:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:55:21,663 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:21,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1452324495, now seen corresponding path program 3 times [2024-06-27 17:55:21,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:21,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467981124] [2024-06-27 17:55:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:21,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:21,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467981124] [2024-06-27 17:55:21,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467981124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:21,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:21,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:21,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110987652] [2024-06-27 17:55:21,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:21,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:21,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:21,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:21,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:21,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 201 transitions, 2133 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:21,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:21,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:21,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:22,402 INFO L124 PetriNetUnfolderBase]: 2969/4893 cut-off events. [2024-06-27 17:55:22,402 INFO L125 PetriNetUnfolderBase]: For 129948/129948 co-relation queries the response was YES. [2024-06-27 17:55:22,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26618 conditions, 4893 events. 2969/4893 cut-off events. For 129948/129948 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32307 event pairs, 518 based on Foata normal form. 12/4895 useless extension candidates. Maximal degree in co-relation 26528. Up to 2901 conditions per place. [2024-06-27 17:55:22,445 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 66 changer transitions 0/250 dead transitions. [2024-06-27 17:55:22,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 250 transitions, 2873 flow [2024-06-27 17:55:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 17:55:22,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:22,468 INFO L175 Difference]: Start difference. First operand has 199 places, 201 transitions, 2133 flow. Second operand 8 states and 240 transitions. [2024-06-27 17:55:22,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 250 transitions, 2873 flow [2024-06-27 17:55:22,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 250 transitions, 2739 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:22,782 INFO L231 Difference]: Finished difference. Result has 201 places, 202 transitions, 2171 flow [2024-06-27 17:55:22,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=201, PETRI_TRANSITIONS=202} [2024-06-27 17:55:22,782 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-06-27 17:55:22,783 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 202 transitions, 2171 flow [2024-06-27 17:55:22,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:22,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:22,783 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 17:55:22,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:55:22,783 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:22,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash -793390351, now seen corresponding path program 4 times [2024-06-27 17:55:22,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:22,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718109316] [2024-06-27 17:55:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:22,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:22,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718109316] [2024-06-27 17:55:22,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718109316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:22,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:22,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:22,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100059472] [2024-06-27 17:55:22,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:22,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:22,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:22,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 202 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:22,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:22,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:22,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:23,513 INFO L124 PetriNetUnfolderBase]: 2949/5051 cut-off events. [2024-06-27 17:55:23,513 INFO L125 PetriNetUnfolderBase]: For 123610/123610 co-relation queries the response was YES. [2024-06-27 17:55:23,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26170 conditions, 5051 events. 2949/5051 cut-off events. For 123610/123610 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34640 event pairs, 955 based on Foata normal form. 12/5004 useless extension candidates. Maximal degree in co-relation 26079. Up to 3831 conditions per place. [2024-06-27 17:55:23,562 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 52 changer transitions 0/247 dead transitions. [2024-06-27 17:55:23,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 2693 flow [2024-06-27 17:55:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:55:23,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-27 17:55:23,564 INFO L175 Difference]: Start difference. First operand has 201 places, 202 transitions, 2171 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:55:23,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 247 transitions, 2693 flow [2024-06-27 17:55:23,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 2561 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:23,866 INFO L231 Difference]: Finished difference. Result has 203 places, 201 transitions, 2063 flow [2024-06-27 17:55:23,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2063, PETRI_PLACES=203, PETRI_TRANSITIONS=201} [2024-06-27 17:55:23,867 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2024-06-27 17:55:23,867 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 201 transitions, 2063 flow [2024-06-27 17:55:23,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:23,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:23,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:23,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:55:23,867 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 17:55:23,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1394870185, now seen corresponding path program 1 times [2024-06-27 17:55:23,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:23,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037118438] [2024-06-27 17:55:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:23,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:23,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037118438] [2024-06-27 17:55:23,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037118438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:23,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:23,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:23,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470117035] [2024-06-27 17:55:23,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:23,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:23,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:24,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:24,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 201 transitions, 2063 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:24,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:24,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:24,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:24,627 INFO L124 PetriNetUnfolderBase]: 2974/5107 cut-off events. [2024-06-27 17:55:24,627 INFO L125 PetriNetUnfolderBase]: For 115372/115375 co-relation queries the response was YES. [2024-06-27 17:55:24,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26058 conditions, 5107 events. 2974/5107 cut-off events. For 115372/115375 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34777 event pairs, 801 based on Foata normal form. 1/5091 useless extension candidates. Maximal degree in co-relation 25966. Up to 4261 conditions per place. [2024-06-27 17:55:24,667 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 190 selfloop transitions, 48 changer transitions 0/252 dead transitions. [2024-06-27 17:55:24,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 252 transitions, 2997 flow [2024-06-27 17:55:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:55:24,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-27 17:55:24,669 INFO L175 Difference]: Start difference. First operand has 203 places, 201 transitions, 2063 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:55:24,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 252 transitions, 2997 flow [2024-06-27 17:55:24,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 252 transitions, 2746 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-27 17:55:24,909 INFO L231 Difference]: Finished difference. Result has 201 places, 217 transitions, 2137 flow [2024-06-27 17:55:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2137, PETRI_PLACES=201, PETRI_TRANSITIONS=217} [2024-06-27 17:55:24,910 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-06-27 17:55:24,910 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 217 transitions, 2137 flow [2024-06-27 17:55:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:24,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:24,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:55:24,911 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 17:55:24,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash -65625921, now seen corresponding path program 1 times [2024-06-27 17:55:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:24,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96685690] [2024-06-27 17:55:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:24,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:25,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96685690] [2024-06-27 17:55:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96685690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:25,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:25,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702820478] [2024-06-27 17:55:25,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:25,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:25,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:25,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 217 transitions, 2137 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:25,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:25,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:25,743 INFO L124 PetriNetUnfolderBase]: 3010/4975 cut-off events. [2024-06-27 17:55:25,743 INFO L125 PetriNetUnfolderBase]: For 117466/117469 co-relation queries the response was YES. [2024-06-27 17:55:25,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 4975 events. 3010/4975 cut-off events. For 117466/117469 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33019 event pairs, 606 based on Foata normal form. 3/4964 useless extension candidates. Maximal degree in co-relation 25474. Up to 4334 conditions per place. [2024-06-27 17:55:25,795 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 204 selfloop transitions, 49 changer transitions 0/267 dead transitions. [2024-06-27 17:55:25,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 267 transitions, 3105 flow [2024-06-27 17:55:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:55:25,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-06-27 17:55:25,796 INFO L175 Difference]: Start difference. First operand has 201 places, 217 transitions, 2137 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:55:25,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 267 transitions, 3105 flow [2024-06-27 17:55:26,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 267 transitions, 3038 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:26,169 INFO L231 Difference]: Finished difference. Result has 209 places, 235 transitions, 2420 flow [2024-06-27 17:55:26,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2420, PETRI_PLACES=209, PETRI_TRANSITIONS=235} [2024-06-27 17:55:26,169 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-06-27 17:55:26,169 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 235 transitions, 2420 flow [2024-06-27 17:55:26,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:26,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:26,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:55:26,170 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 17:55:26,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash -65626107, now seen corresponding path program 2 times [2024-06-27 17:55:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:26,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824657177] [2024-06-27 17:55:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:26,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824657177] [2024-06-27 17:55:26,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824657177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:26,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:26,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201415492] [2024-06-27 17:55:26,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:26,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:26,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:26,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:26,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:26,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 235 transitions, 2420 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:26,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:26,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:26,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:26,908 INFO L124 PetriNetUnfolderBase]: 3021/4986 cut-off events. [2024-06-27 17:55:26,908 INFO L125 PetriNetUnfolderBase]: For 123414/123417 co-relation queries the response was YES. [2024-06-27 17:55:26,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26219 conditions, 4986 events. 3021/4986 cut-off events. For 123414/123417 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33048 event pairs, 587 based on Foata normal form. 3/4981 useless extension candidates. Maximal degree in co-relation 26123. Up to 4431 conditions per place. [2024-06-27 17:55:26,952 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 219 selfloop transitions, 35 changer transitions 0/268 dead transitions. [2024-06-27 17:55:26,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 268 transitions, 3036 flow [2024-06-27 17:55:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:55:26,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:55:26,955 INFO L175 Difference]: Start difference. First operand has 209 places, 235 transitions, 2420 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:55:26,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 268 transitions, 3036 flow [2024-06-27 17:55:27,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 268 transitions, 2971 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:27,285 INFO L231 Difference]: Finished difference. Result has 215 places, 238 transitions, 2475 flow [2024-06-27 17:55:27,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2475, PETRI_PLACES=215, PETRI_TRANSITIONS=238} [2024-06-27 17:55:27,290 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2024-06-27 17:55:27,290 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 238 transitions, 2475 flow [2024-06-27 17:55:27,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:27,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:27,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:27,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:55:27,291 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 17:55:27,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash -260469609, now seen corresponding path program 3 times [2024-06-27 17:55:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445360344] [2024-06-27 17:55:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:27,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:27,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445360344] [2024-06-27 17:55:27,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445360344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:27,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:27,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:27,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102283366] [2024-06-27 17:55:27,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:27,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:27,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:27,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 2475 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:27,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:27,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:27,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:28,090 INFO L124 PetriNetUnfolderBase]: 3068/5246 cut-off events. [2024-06-27 17:55:28,090 INFO L125 PetriNetUnfolderBase]: For 130481/130484 co-relation queries the response was YES. [2024-06-27 17:55:28,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27119 conditions, 5246 events. 3068/5246 cut-off events. For 130481/130484 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35816 event pairs, 773 based on Foata normal form. 3/5237 useless extension candidates. Maximal degree in co-relation 27021. Up to 4474 conditions per place. [2024-06-27 17:55:28,135 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 220 selfloop transitions, 48 changer transitions 0/282 dead transitions. [2024-06-27 17:55:28,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 282 transitions, 3365 flow [2024-06-27 17:55:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:55:28,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 17:55:28,136 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 2475 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:55:28,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 282 transitions, 3365 flow [2024-06-27 17:55:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 282 transitions, 3249 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:28,507 INFO L231 Difference]: Finished difference. Result has 218 places, 251 transitions, 2665 flow [2024-06-27 17:55:28,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2665, PETRI_PLACES=218, PETRI_TRANSITIONS=251} [2024-06-27 17:55:28,508 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-27 17:55:28,508 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 251 transitions, 2665 flow [2024-06-27 17:55:28,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:28,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:28,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:28,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:55:28,509 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 17:55:28,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash -260232273, now seen corresponding path program 2 times [2024-06-27 17:55:28,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:28,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215424445] [2024-06-27 17:55:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:28,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:28,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:28,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215424445] [2024-06-27 17:55:28,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215424445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:28,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:28,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954747137] [2024-06-27 17:55:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:28,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:28,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:28,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:28,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 251 transitions, 2665 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:28,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:28,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:28,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:29,211 INFO L124 PetriNetUnfolderBase]: 3107/5304 cut-off events. [2024-06-27 17:55:29,211 INFO L125 PetriNetUnfolderBase]: For 137923/137926 co-relation queries the response was YES. [2024-06-27 17:55:29,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27720 conditions, 5304 events. 3107/5304 cut-off events. For 137923/137926 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 36186 event pairs, 783 based on Foata normal form. 3/5293 useless extension candidates. Maximal degree in co-relation 27621. Up to 4441 conditions per place. [2024-06-27 17:55:29,260 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 212 selfloop transitions, 63 changer transitions 0/289 dead transitions. [2024-06-27 17:55:29,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 289 transitions, 3618 flow [2024-06-27 17:55:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:55:29,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:55:29,261 INFO L175 Difference]: Start difference. First operand has 218 places, 251 transitions, 2665 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:55:29,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 289 transitions, 3618 flow [2024-06-27 17:55:29,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 289 transitions, 3511 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:29,684 INFO L231 Difference]: Finished difference. Result has 223 places, 260 transitions, 2823 flow [2024-06-27 17:55:29,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=223, PETRI_TRANSITIONS=260} [2024-06-27 17:55:29,685 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-27 17:55:29,685 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 260 transitions, 2823 flow [2024-06-27 17:55:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:29,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:29,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:29,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:55:29,685 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 17:55:29,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -260469423, now seen corresponding path program 3 times [2024-06-27 17:55:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:29,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715740843] [2024-06-27 17:55:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715740843] [2024-06-27 17:55:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715740843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:29,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:29,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125583106] [2024-06-27 17:55:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:29,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:29,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:29,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:29,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 260 transitions, 2823 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:29,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:29,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:29,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:30,419 INFO L124 PetriNetUnfolderBase]: 3104/5115 cut-off events. [2024-06-27 17:55:30,419 INFO L125 PetriNetUnfolderBase]: For 140253/140256 co-relation queries the response was YES. [2024-06-27 17:55:30,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27561 conditions, 5115 events. 3104/5115 cut-off events. For 140253/140256 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 33967 event pairs, 596 based on Foata normal form. 3/5108 useless extension candidates. Maximal degree in co-relation 27461. Up to 4438 conditions per place. [2024-06-27 17:55:30,471 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 214 selfloop transitions, 61 changer transitions 0/289 dead transitions. [2024-06-27 17:55:30,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 289 transitions, 3647 flow [2024-06-27 17:55:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:55:30,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 17:55:30,472 INFO L175 Difference]: Start difference. First operand has 223 places, 260 transitions, 2823 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:55:30,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 289 transitions, 3647 flow [2024-06-27 17:55:30,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 289 transitions, 3517 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:30,991 INFO L231 Difference]: Finished difference. Result has 227 places, 260 transitions, 2821 flow [2024-06-27 17:55:30,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2821, PETRI_PLACES=227, PETRI_TRANSITIONS=260} [2024-06-27 17:55:30,992 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2024-06-27 17:55:30,992 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 260 transitions, 2821 flow [2024-06-27 17:55:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:30,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:30,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:55:30,992 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 17:55:30,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash -260223345, now seen corresponding path program 1 times [2024-06-27 17:55:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857414660] [2024-06-27 17:55:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:31,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857414660] [2024-06-27 17:55:31,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857414660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:31,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:31,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:31,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646952692] [2024-06-27 17:55:31,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:31,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:31,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:31,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:31,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 260 transitions, 2821 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:31,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:31,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:31,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:31,719 INFO L124 PetriNetUnfolderBase]: 3038/5027 cut-off events. [2024-06-27 17:55:31,719 INFO L125 PetriNetUnfolderBase]: For 157587/157587 co-relation queries the response was YES. [2024-06-27 17:55:31,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27297 conditions, 5027 events. 3038/5027 cut-off events. For 157587/157587 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33448 event pairs, 558 based on Foata normal form. 10/4989 useless extension candidates. Maximal degree in co-relation 27196. Up to 4225 conditions per place. [2024-06-27 17:55:31,764 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 211 selfloop transitions, 37 changer transitions 0/292 dead transitions. [2024-06-27 17:55:31,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 292 transitions, 3421 flow [2024-06-27 17:55:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:55:31,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:55:31,765 INFO L175 Difference]: Start difference. First operand has 227 places, 260 transitions, 2821 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:55:31,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 292 transitions, 3421 flow [2024-06-27 17:55:32,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 292 transitions, 3300 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:32,134 INFO L231 Difference]: Finished difference. Result has 230 places, 261 transitions, 2794 flow [2024-06-27 17:55:32,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2794, PETRI_PLACES=230, PETRI_TRANSITIONS=261} [2024-06-27 17:55:32,134 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 180 predicate places. [2024-06-27 17:55:32,134 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 261 transitions, 2794 flow [2024-06-27 17:55:32,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:32,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:32,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:32,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:55:32,135 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 17:55:32,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 73674753, now seen corresponding path program 4 times [2024-06-27 17:55:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:32,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759258870] [2024-06-27 17:55:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:32,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:32,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:32,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759258870] [2024-06-27 17:55:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759258870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:32,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:32,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:32,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261339428] [2024-06-27 17:55:32,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:32,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:32,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:32,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 261 transitions, 2794 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:32,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:32,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:32,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:32,881 INFO L124 PetriNetUnfolderBase]: 3211/5512 cut-off events. [2024-06-27 17:55:32,882 INFO L125 PetriNetUnfolderBase]: For 153799/153799 co-relation queries the response was YES. [2024-06-27 17:55:32,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28820 conditions, 5512 events. 3211/5512 cut-off events. For 153799/153799 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38072 event pairs, 733 based on Foata normal form. 1/5502 useless extension candidates. Maximal degree in co-relation 28718. Up to 4556 conditions per place. [2024-06-27 17:55:32,931 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 210 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-06-27 17:55:32,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 299 transitions, 3758 flow [2024-06-27 17:55:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:55:32,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:55:32,932 INFO L175 Difference]: Start difference. First operand has 230 places, 261 transitions, 2794 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:55:32,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 299 transitions, 3758 flow [2024-06-27 17:55:33,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 299 transitions, 3684 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:33,384 INFO L231 Difference]: Finished difference. Result has 232 places, 267 transitions, 2980 flow [2024-06-27 17:55:33,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2980, PETRI_PLACES=232, PETRI_TRANSITIONS=267} [2024-06-27 17:55:33,384 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 182 predicate places. [2024-06-27 17:55:33,384 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 267 transitions, 2980 flow [2024-06-27 17:55:33,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:33,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:33,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:55:33,385 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 17:55:33,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1228594817, now seen corresponding path program 5 times [2024-06-27 17:55:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:33,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005299702] [2024-06-27 17:55:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:33,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005299702] [2024-06-27 17:55:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005299702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:33,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082306901] [2024-06-27 17:55:33,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:33,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:33,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:33,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:33,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:33,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:33,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 267 transitions, 2980 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:33,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:33,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:33,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:34,249 INFO L124 PetriNetUnfolderBase]: 3236/5554 cut-off events. [2024-06-27 17:55:34,250 INFO L125 PetriNetUnfolderBase]: For 160890/160890 co-relation queries the response was YES. [2024-06-27 17:55:34,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29387 conditions, 5554 events. 3236/5554 cut-off events. For 160890/160890 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38362 event pairs, 735 based on Foata normal form. 1/5544 useless extension candidates. Maximal degree in co-relation 29284. Up to 4583 conditions per place. [2024-06-27 17:55:34,292 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 207 selfloop transitions, 82 changer transitions 0/303 dead transitions. [2024-06-27 17:55:34,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 3973 flow [2024-06-27 17:55:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:55:34,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 17:55:34,294 INFO L175 Difference]: Start difference. First operand has 232 places, 267 transitions, 2980 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:55:34,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 3973 flow [2024-06-27 17:55:34,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 303 transitions, 3775 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:34,676 INFO L231 Difference]: Finished difference. Result has 236 places, 274 transitions, 3081 flow [2024-06-27 17:55:34,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3081, PETRI_PLACES=236, PETRI_TRANSITIONS=274} [2024-06-27 17:55:34,677 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 186 predicate places. [2024-06-27 17:55:34,677 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 274 transitions, 3081 flow [2024-06-27 17:55:34,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:34,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:34,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:34,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:55:34,677 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 17:55:34,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash 959714147, now seen corresponding path program 6 times [2024-06-27 17:55:34,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:34,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819342892] [2024-06-27 17:55:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:34,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:34,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819342892] [2024-06-27 17:55:34,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819342892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:34,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:34,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:34,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521244449] [2024-06-27 17:55:34,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:34,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:34,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:34,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:34,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:34,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 274 transitions, 3081 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:34,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:34,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:34,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:35,372 INFO L124 PetriNetUnfolderBase]: 3233/5309 cut-off events. [2024-06-27 17:55:35,372 INFO L125 PetriNetUnfolderBase]: For 162359/162359 co-relation queries the response was YES. [2024-06-27 17:55:35,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29011 conditions, 5309 events. 3233/5309 cut-off events. For 162359/162359 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35443 event pairs, 604 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 28907. Up to 4580 conditions per place. [2024-06-27 17:55:35,418 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 215 selfloop transitions, 78 changer transitions 0/307 dead transitions. [2024-06-27 17:55:35,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 307 transitions, 4079 flow [2024-06-27 17:55:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:55:35,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:55:35,419 INFO L175 Difference]: Start difference. First operand has 236 places, 274 transitions, 3081 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:55:35,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 307 transitions, 4079 flow [2024-06-27 17:55:35,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 3919 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:35,920 INFO L231 Difference]: Finished difference. Result has 240 places, 274 transitions, 3083 flow [2024-06-27 17:55:35,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3083, PETRI_PLACES=240, PETRI_TRANSITIONS=274} [2024-06-27 17:55:35,921 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-06-27 17:55:35,921 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 274 transitions, 3083 flow [2024-06-27 17:55:35,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:35,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:35,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:35,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:55:35,922 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 17:55:35,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash -182705601, now seen corresponding path program 4 times [2024-06-27 17:55:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784962409] [2024-06-27 17:55:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:35,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784962409] [2024-06-27 17:55:36,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784962409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:36,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:36,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745786335] [2024-06-27 17:55:36,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:36,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:36,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:36,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:36,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 274 transitions, 3083 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:36,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:36,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:36,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:36,679 INFO L124 PetriNetUnfolderBase]: 3230/5507 cut-off events. [2024-06-27 17:55:36,680 INFO L125 PetriNetUnfolderBase]: For 167653/167653 co-relation queries the response was YES. [2024-06-27 17:55:36,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29168 conditions, 5507 events. 3230/5507 cut-off events. For 167653/167653 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37946 event pairs, 758 based on Foata normal form. 1/5493 useless extension candidates. Maximal degree in co-relation 29063. Up to 4621 conditions per place. [2024-06-27 17:55:36,730 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 226 selfloop transitions, 65 changer transitions 0/305 dead transitions. [2024-06-27 17:55:36,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 305 transitions, 3994 flow [2024-06-27 17:55:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:55:36,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:55:36,731 INFO L175 Difference]: Start difference. First operand has 240 places, 274 transitions, 3083 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:55:36,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 305 transitions, 3994 flow [2024-06-27 17:55:37,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 305 transitions, 3822 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:37,351 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 3082 flow [2024-06-27 17:55:37,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3082, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-27 17:55:37,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 193 predicate places. [2024-06-27 17:55:37,352 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 3082 flow [2024-06-27 17:55:37,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:37,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:37,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:37,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:55:37,352 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 17:55:37,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash 614618165, now seen corresponding path program 7 times [2024-06-27 17:55:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:37,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20513129] [2024-06-27 17:55:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:37,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:37,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:37,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20513129] [2024-06-27 17:55:37,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20513129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:37,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:37,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739398890] [2024-06-27 17:55:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:37,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:37,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:37,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:37,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 3082 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:37,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:37,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:37,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:38,159 INFO L124 PetriNetUnfolderBase]: 3227/5496 cut-off events. [2024-06-27 17:55:38,159 INFO L125 PetriNetUnfolderBase]: For 170159/170159 co-relation queries the response was YES. [2024-06-27 17:55:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29039 conditions, 5496 events. 3227/5496 cut-off events. For 170159/170159 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37782 event pairs, 744 based on Foata normal form. 1/5484 useless extension candidates. Maximal degree in co-relation 28933. Up to 4716 conditions per place. [2024-06-27 17:55:38,217 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 247 selfloop transitions, 42 changer transitions 0/303 dead transitions. [2024-06-27 17:55:38,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 303 transitions, 3722 flow [2024-06-27 17:55:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:55:38,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-27 17:55:38,218 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 3082 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:55:38,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 303 transitions, 3722 flow [2024-06-27 17:55:38,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 303 transitions, 3598 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:38,767 INFO L231 Difference]: Finished difference. Result has 248 places, 276 transitions, 3048 flow [2024-06-27 17:55:38,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3048, PETRI_PLACES=248, PETRI_TRANSITIONS=276} [2024-06-27 17:55:38,768 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-27 17:55:38,768 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 276 transitions, 3048 flow [2024-06-27 17:55:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:38,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:55:38,768 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 17:55:38,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1343885987, now seen corresponding path program 8 times [2024-06-27 17:55:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:38,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870707567] [2024-06-27 17:55:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:38,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:38,868 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 17:55:38,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:38,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870707567] [2024-06-27 17:55:38,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870707567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:38,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:38,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:38,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834951982] [2024-06-27 17:55:38,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:38,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:38,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:38,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:38,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:38,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:38,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 276 transitions, 3048 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:38,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:38,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:39,580 INFO L124 PetriNetUnfolderBase]: 3263/5549 cut-off events. [2024-06-27 17:55:39,580 INFO L125 PetriNetUnfolderBase]: For 177330/177330 co-relation queries the response was YES. [2024-06-27 17:55:39,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29397 conditions, 5549 events. 3263/5549 cut-off events. For 177330/177330 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38138 event pairs, 742 based on Foata normal form. 1/5539 useless extension candidates. Maximal degree in co-relation 29289. Up to 4733 conditions per place. [2024-06-27 17:55:39,631 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 241 selfloop transitions, 57 changer transitions 0/312 dead transitions. [2024-06-27 17:55:39,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 312 transitions, 3977 flow [2024-06-27 17:55:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:55:39,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-06-27 17:55:39,632 INFO L175 Difference]: Start difference. First operand has 248 places, 276 transitions, 3048 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:55:39,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 312 transitions, 3977 flow [2024-06-27 17:55:40,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 312 transitions, 3879 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:40,189 INFO L231 Difference]: Finished difference. Result has 250 places, 287 transitions, 3259 flow [2024-06-27 17:55:40,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3259, PETRI_PLACES=250, PETRI_TRANSITIONS=287} [2024-06-27 17:55:40,190 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-06-27 17:55:40,190 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 287 transitions, 3259 flow [2024-06-27 17:55:40,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:40,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:40,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:40,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:55:40,191 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 17:55:40,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1343619077, now seen corresponding path program 9 times [2024-06-27 17:55:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:40,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031860568] [2024-06-27 17:55:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:40,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:40,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031860568] [2024-06-27 17:55:40,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031860568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:40,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:40,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:40,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793600536] [2024-06-27 17:55:40,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:40,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:40,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:40,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:40,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:40,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 287 transitions, 3259 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:40,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:40,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:40,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:41,149 INFO L124 PetriNetUnfolderBase]: 3260/5358 cut-off events. [2024-06-27 17:55:41,149 INFO L125 PetriNetUnfolderBase]: For 179219/179219 co-relation queries the response was YES. [2024-06-27 17:55:41,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29342 conditions, 5358 events. 3260/5358 cut-off events. For 179219/179219 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35868 event pairs, 604 based on Foata normal form. 1/5352 useless extension candidates. Maximal degree in co-relation 29232. Up to 4730 conditions per place. [2024-06-27 17:55:41,210 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 245 selfloop transitions, 58 changer transitions 0/317 dead transitions. [2024-06-27 17:55:41,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 317 transitions, 3931 flow [2024-06-27 17:55:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:55:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:55:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 17:55:41,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-06-27 17:55:41,211 INFO L175 Difference]: Start difference. First operand has 250 places, 287 transitions, 3259 flow. Second operand 9 states and 244 transitions. [2024-06-27 17:55:41,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 317 transitions, 3931 flow [2024-06-27 17:55:41,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 317 transitions, 3813 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:41,916 INFO L231 Difference]: Finished difference. Result has 257 places, 287 transitions, 3263 flow [2024-06-27 17:55:41,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3263, PETRI_PLACES=257, PETRI_TRANSITIONS=287} [2024-06-27 17:55:41,916 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-06-27 17:55:41,917 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 287 transitions, 3263 flow [2024-06-27 17:55:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:41,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:41,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:41,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:55:41,917 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 17:55:41,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash 201524829, now seen corresponding path program 5 times [2024-06-27 17:55:41,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:41,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970836814] [2024-06-27 17:55:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:41,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:42,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:42,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970836814] [2024-06-27 17:55:42,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970836814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:42,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:42,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:42,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014662645] [2024-06-27 17:55:42,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:42,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:42,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:42,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:42,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 287 transitions, 3263 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:42,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:42,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:42,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:42,760 INFO L124 PetriNetUnfolderBase]: 3271/5517 cut-off events. [2024-06-27 17:55:42,760 INFO L125 PetriNetUnfolderBase]: For 185323/185323 co-relation queries the response was YES. [2024-06-27 17:55:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29633 conditions, 5517 events. 3271/5517 cut-off events. For 185323/185323 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37796 event pairs, 1033 based on Foata normal form. 1/5486 useless extension candidates. Maximal degree in co-relation 29522. Up to 4849 conditions per place. [2024-06-27 17:55:42,811 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 275 selfloop transitions, 25 changer transitions 0/314 dead transitions. [2024-06-27 17:55:42,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 314 transitions, 3968 flow [2024-06-27 17:55:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:55:42,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-27 17:55:42,812 INFO L175 Difference]: Start difference. First operand has 257 places, 287 transitions, 3263 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:55:42,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 314 transitions, 3968 flow [2024-06-27 17:55:43,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 314 transitions, 3840 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 17:55:43,445 INFO L231 Difference]: Finished difference. Result has 257 places, 290 transitions, 3248 flow [2024-06-27 17:55:43,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3135, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3248, PETRI_PLACES=257, PETRI_TRANSITIONS=290} [2024-06-27 17:55:43,447 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-06-27 17:55:43,447 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 290 transitions, 3248 flow [2024-06-27 17:55:43,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:43,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:43,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:43,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:55:43,448 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 17:55:43,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:43,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1343619263, now seen corresponding path program 6 times [2024-06-27 17:55:43,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:43,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709342784] [2024-06-27 17:55:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:43,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:43,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709342784] [2024-06-27 17:55:43,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709342784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:43,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:43,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973118246] [2024-06-27 17:55:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:43,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:43,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:43,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:43,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 290 transitions, 3248 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:43,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:43,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:43,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:44,211 INFO L124 PetriNetUnfolderBase]: 3282/5400 cut-off events. [2024-06-27 17:55:44,211 INFO L125 PetriNetUnfolderBase]: For 189638/189638 co-relation queries the response was YES. [2024-06-27 17:55:44,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29563 conditions, 5400 events. 3282/5400 cut-off events. For 189638/189638 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36304 event pairs, 616 based on Foata normal form. 1/5390 useless extension candidates. Maximal degree in co-relation 29452. Up to 4679 conditions per place. [2024-06-27 17:55:44,261 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 232 selfloop transitions, 72 changer transitions 0/318 dead transitions. [2024-06-27 17:55:44,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 318 transitions, 4093 flow [2024-06-27 17:55:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:55:44,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 17:55:44,263 INFO L175 Difference]: Start difference. First operand has 257 places, 290 transitions, 3248 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:55:44,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 318 transitions, 4093 flow [2024-06-27 17:55:44,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 318 transitions, 4003 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:44,778 INFO L231 Difference]: Finished difference. Result has 259 places, 293 transitions, 3365 flow [2024-06-27 17:55:44,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3365, PETRI_PLACES=259, PETRI_TRANSITIONS=293} [2024-06-27 17:55:44,779 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 209 predicate places. [2024-06-27 17:55:44,779 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 293 transitions, 3365 flow [2024-06-27 17:55:44,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:44,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:44,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:44,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:55:44,780 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 17:55:44,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1921206627, now seen corresponding path program 10 times [2024-06-27 17:55:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:44,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138240874] [2024-06-27 17:55:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:44,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138240874] [2024-06-27 17:55:44,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138240874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:44,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:44,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:44,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650702849] [2024-06-27 17:55:44,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:44,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:44,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:44,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:44,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 293 transitions, 3365 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:44,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:44,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:44,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:45,605 INFO L124 PetriNetUnfolderBase]: 3279/5638 cut-off events. [2024-06-27 17:55:45,605 INFO L125 PetriNetUnfolderBase]: For 195211/195211 co-relation queries the response was YES. [2024-06-27 17:55:45,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29951 conditions, 5638 events. 3279/5638 cut-off events. For 195211/195211 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39234 event pairs, 738 based on Foata normal form. 1/5628 useless extension candidates. Maximal degree in co-relation 29839. Up to 4667 conditions per place. [2024-06-27 17:55:45,660 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 226 selfloop transitions, 81 changer transitions 0/321 dead transitions. [2024-06-27 17:55:45,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 321 transitions, 4171 flow [2024-06-27 17:55:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:55:45,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:45,661 INFO L175 Difference]: Start difference. First operand has 259 places, 293 transitions, 3365 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:55:45,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 321 transitions, 4171 flow [2024-06-27 17:55:46,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 321 transitions, 4013 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:46,319 INFO L231 Difference]: Finished difference. Result has 261 places, 293 transitions, 3383 flow [2024-06-27 17:55:46,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3383, PETRI_PLACES=261, PETRI_TRANSITIONS=293} [2024-06-27 17:55:46,319 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 211 predicate places. [2024-06-27 17:55:46,319 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 293 transitions, 3383 flow [2024-06-27 17:55:46,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:46,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:46,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:55:46,320 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 17:55:46,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash -911732981, now seen corresponding path program 7 times [2024-06-27 17:55:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:46,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227165336] [2024-06-27 17:55:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:46,410 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 17:55:46,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:46,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227165336] [2024-06-27 17:55:46,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227165336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:46,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:46,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946284206] [2024-06-27 17:55:46,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:46,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:46,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:46,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 293 transitions, 3383 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:46,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:46,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:46,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:47,110 INFO L124 PetriNetUnfolderBase]: 3304/5458 cut-off events. [2024-06-27 17:55:47,111 INFO L125 PetriNetUnfolderBase]: For 202706/202709 co-relation queries the response was YES. [2024-06-27 17:55:47,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30178 conditions, 5458 events. 3304/5458 cut-off events. For 202706/202709 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 36893 event pairs, 614 based on Foata normal form. 3/5444 useless extension candidates. Maximal degree in co-relation 30065. Up to 4771 conditions per place. [2024-06-27 17:55:47,162 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 252 selfloop transitions, 59 changer transitions 0/325 dead transitions. [2024-06-27 17:55:47,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 325 transitions, 4314 flow [2024-06-27 17:55:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 17:55:47,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826086956521739 [2024-06-27 17:55:47,163 INFO L175 Difference]: Start difference. First operand has 261 places, 293 transitions, 3383 flow. Second operand 5 states and 157 transitions. [2024-06-27 17:55:47,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 325 transitions, 4314 flow [2024-06-27 17:55:47,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 325 transitions, 4130 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:47,786 INFO L231 Difference]: Finished difference. Result has 261 places, 300 transitions, 3512 flow [2024-06-27 17:55:47,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3512, PETRI_PLACES=261, PETRI_TRANSITIONS=300} [2024-06-27 17:55:47,786 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 211 predicate places. [2024-06-27 17:55:47,786 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 300 transitions, 3512 flow [2024-06-27 17:55:47,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:47,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:47,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:47,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:55:47,787 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 17:55:47,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:47,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1876393691, now seen corresponding path program 8 times [2024-06-27 17:55:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:47,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152157653] [2024-06-27 17:55:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:47,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152157653] [2024-06-27 17:55:47,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152157653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:47,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:47,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:47,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694739243] [2024-06-27 17:55:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:47,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:47,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:47,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 300 transitions, 3512 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:47,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:47,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:47,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:48,605 INFO L124 PetriNetUnfolderBase]: 3326/5467 cut-off events. [2024-06-27 17:55:48,605 INFO L125 PetriNetUnfolderBase]: For 196386/196386 co-relation queries the response was YES. [2024-06-27 17:55:48,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30412 conditions, 5467 events. 3326/5467 cut-off events. For 196386/196386 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36816 event pairs, 592 based on Foata normal form. 1/5464 useless extension candidates. Maximal degree in co-relation 30298. Up to 4914 conditions per place. [2024-06-27 17:55:48,660 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 282 selfloop transitions, 31 changer transitions 0/327 dead transitions. [2024-06-27 17:55:48,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 327 transitions, 4290 flow [2024-06-27 17:55:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-27 17:55:48,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-06-27 17:55:48,661 INFO L175 Difference]: Start difference. First operand has 261 places, 300 transitions, 3512 flow. Second operand 6 states and 170 transitions. [2024-06-27 17:55:48,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 327 transitions, 4290 flow [2024-06-27 17:55:49,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 327 transitions, 4182 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:49,531 INFO L231 Difference]: Finished difference. Result has 264 places, 306 transitions, 3586 flow [2024-06-27 17:55:49,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3586, PETRI_PLACES=264, PETRI_TRANSITIONS=306} [2024-06-27 17:55:49,531 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-06-27 17:55:49,532 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 306 transitions, 3586 flow [2024-06-27 17:55:49,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:49,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:49,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:55:49,532 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 17:55:49,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:49,533 INFO L85 PathProgramCache]: Analyzing trace with hash 704541411, now seen corresponding path program 11 times [2024-06-27 17:55:49,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:49,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082590807] [2024-06-27 17:55:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:49,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:49,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:49,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082590807] [2024-06-27 17:55:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082590807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:49,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:49,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602325346] [2024-06-27 17:55:49,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:49,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:49,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:49,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:49,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 306 transitions, 3586 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:49,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:49,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:49,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:50,396 INFO L124 PetriNetUnfolderBase]: 3323/5717 cut-off events. [2024-06-27 17:55:50,397 INFO L125 PetriNetUnfolderBase]: For 197143/197143 co-relation queries the response was YES. [2024-06-27 17:55:50,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30432 conditions, 5717 events. 3323/5717 cut-off events. For 197143/197143 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39864 event pairs, 731 based on Foata normal form. 1/5709 useless extension candidates. Maximal degree in co-relation 30318. Up to 4728 conditions per place. [2024-06-27 17:55:50,452 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 248 selfloop transitions, 84 changer transitions 0/346 dead transitions. [2024-06-27 17:55:50,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 346 transitions, 4470 flow [2024-06-27 17:55:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:55:50,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:55:50,453 INFO L175 Difference]: Start difference. First operand has 264 places, 306 transitions, 3586 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:55:50,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 346 transitions, 4470 flow [2024-06-27 17:55:51,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 346 transitions, 4384 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:51,152 INFO L231 Difference]: Finished difference. Result has 270 places, 306 transitions, 3686 flow [2024-06-27 17:55:51,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3686, PETRI_PLACES=270, PETRI_TRANSITIONS=306} [2024-06-27 17:55:51,153 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 220 predicate places. [2024-06-27 17:55:51,153 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 306 transitions, 3686 flow [2024-06-27 17:55:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:51,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:55:51,154 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 17:55:51,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -911553491, now seen corresponding path program 9 times [2024-06-27 17:55:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867467475] [2024-06-27 17:55:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:51,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:51,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867467475] [2024-06-27 17:55:51,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867467475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:51,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:51,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:51,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617525610] [2024-06-27 17:55:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:51,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:51,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:51,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:51,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 306 transitions, 3686 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:51,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:51,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:51,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:52,009 INFO L124 PetriNetUnfolderBase]: 3320/5451 cut-off events. [2024-06-27 17:55:52,009 INFO L125 PetriNetUnfolderBase]: For 198299/198299 co-relation queries the response was YES. [2024-06-27 17:55:52,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30384 conditions, 5451 events. 3320/5451 cut-off events. For 198299/198299 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36622 event pairs, 586 based on Foata normal form. 1/5448 useless extension candidates. Maximal degree in co-relation 30269. Up to 4784 conditions per place. [2024-06-27 17:55:52,063 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 260 selfloop transitions, 68 changer transitions 0/342 dead transitions. [2024-06-27 17:55:52,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 342 transitions, 4428 flow [2024-06-27 17:55:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:55:52,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:55:52,065 INFO L175 Difference]: Start difference. First operand has 270 places, 306 transitions, 3686 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:55:52,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 342 transitions, 4428 flow [2024-06-27 17:55:52,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 342 transitions, 4206 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 17:55:52,752 INFO L231 Difference]: Finished difference. Result has 267 places, 306 transitions, 3628 flow [2024-06-27 17:55:52,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3628, PETRI_PLACES=267, PETRI_TRANSITIONS=306} [2024-06-27 17:55:52,753 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-27 17:55:52,753 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 306 transitions, 3628 flow [2024-06-27 17:55:52,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:52,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:52,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:52,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:55:52,753 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 17:55:52,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1920939903, now seen corresponding path program 10 times [2024-06-27 17:55:52,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:52,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746648609] [2024-06-27 17:55:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:52,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:52,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:52,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746648609] [2024-06-27 17:55:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746648609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:52,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366088339] [2024-06-27 17:55:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:52,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:52,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:52,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:52,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 306 transitions, 3628 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:52,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:52,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:52,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:53,586 INFO L124 PetriNetUnfolderBase]: 3317/5658 cut-off events. [2024-06-27 17:55:53,586 INFO L125 PetriNetUnfolderBase]: For 189227/189227 co-relation queries the response was YES. [2024-06-27 17:55:53,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30230 conditions, 5658 events. 3317/5658 cut-off events. For 189227/189227 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39219 event pairs, 759 based on Foata normal form. 1/5642 useless extension candidates. Maximal degree in co-relation 30117. Up to 4712 conditions per place. [2024-06-27 17:55:53,632 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 230 selfloop transitions, 87 changer transitions 0/331 dead transitions. [2024-06-27 17:55:53,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 331 transitions, 4444 flow [2024-06-27 17:55:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:55:53,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:55:53,633 INFO L175 Difference]: Start difference. First operand has 267 places, 306 transitions, 3628 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:55:53,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 331 transitions, 4444 flow [2024-06-27 17:55:54,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 331 transitions, 4266 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:54,131 INFO L231 Difference]: Finished difference. Result has 267 places, 306 transitions, 3642 flow [2024-06-27 17:55:54,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3642, PETRI_PLACES=267, PETRI_TRANSITIONS=306} [2024-06-27 17:55:54,132 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-27 17:55:54,132 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 306 transitions, 3642 flow [2024-06-27 17:55:54,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:54,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:54,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:55:54,133 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 17:55:54,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:54,133 INFO L85 PathProgramCache]: Analyzing trace with hash 494320095, now seen corresponding path program 12 times [2024-06-27 17:55:54,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:54,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8442025] [2024-06-27 17:55:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8442025] [2024-06-27 17:55:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8442025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:54,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096815233] [2024-06-27 17:55:54,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:54,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:54,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:54,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:54,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 306 transitions, 3642 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:54,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:54,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:54,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:54,957 INFO L124 PetriNetUnfolderBase]: 3314/5464 cut-off events. [2024-06-27 17:55:54,957 INFO L125 PetriNetUnfolderBase]: For 179082/179085 co-relation queries the response was YES. [2024-06-27 17:55:54,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29886 conditions, 5464 events. 3314/5464 cut-off events. For 179082/179085 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36901 event pairs, 601 based on Foata normal form. 3/5461 useless extension candidates. Maximal degree in co-relation 29773. Up to 4717 conditions per place. [2024-06-27 17:55:55,006 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 250 selfloop transitions, 84 changer transitions 0/348 dead transitions. [2024-06-27 17:55:55,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 348 transitions, 4410 flow [2024-06-27 17:55:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:55:55,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:55:55,008 INFO L175 Difference]: Start difference. First operand has 267 places, 306 transitions, 3642 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:55:55,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 348 transitions, 4410 flow [2024-06-27 17:55:55,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 348 transitions, 4194 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:55,615 INFO L231 Difference]: Finished difference. Result has 269 places, 306 transitions, 3612 flow [2024-06-27 17:55:55,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3612, PETRI_PLACES=269, PETRI_TRANSITIONS=306} [2024-06-27 17:55:55,616 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 219 predicate places. [2024-06-27 17:55:55,616 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 306 transitions, 3612 flow [2024-06-27 17:55:55,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:55,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:55,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:55:55,617 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 17:55:55,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash -924482351, now seen corresponding path program 11 times [2024-06-27 17:55:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:55,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330502068] [2024-06-27 17:55:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:55,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:55,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330502068] [2024-06-27 17:55:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330502068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:55,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023996720] [2024-06-27 17:55:55,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:55,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:55,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 306 transitions, 3612 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:55,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:55,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:55,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:56,445 INFO L124 PetriNetUnfolderBase]: 3325/5501 cut-off events. [2024-06-27 17:55:56,445 INFO L125 PetriNetUnfolderBase]: For 176413/176416 co-relation queries the response was YES. [2024-06-27 17:55:56,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29910 conditions, 5501 events. 3325/5501 cut-off events. For 176413/176416 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37320 event pairs, 622 based on Foata normal form. 3/5488 useless extension candidates. Maximal degree in co-relation 29798. Up to 4720 conditions per place. [2024-06-27 17:55:56,501 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 233 selfloop transitions, 90 changer transitions 0/337 dead transitions. [2024-06-27 17:55:56,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 337 transitions, 4498 flow [2024-06-27 17:55:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:55:56,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:55:56,502 INFO L175 Difference]: Start difference. First operand has 269 places, 306 transitions, 3612 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:55:56,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 337 transitions, 4498 flow [2024-06-27 17:55:56,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 337 transitions, 4294 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:56,920 INFO L231 Difference]: Finished difference. Result has 267 places, 309 transitions, 3664 flow [2024-06-27 17:55:56,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3416, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3664, PETRI_PLACES=267, PETRI_TRANSITIONS=309} [2024-06-27 17:55:56,920 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-27 17:55:56,920 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 309 transitions, 3664 flow [2024-06-27 17:55:56,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:56,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:56,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:56,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:55:56,921 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 17:55:56,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash -924245201, now seen corresponding path program 12 times [2024-06-27 17:55:56,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:56,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40165180] [2024-06-27 17:55:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:56,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:57,005 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 17:55:57,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40165180] [2024-06-27 17:55:57,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40165180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:57,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:57,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:57,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337250295] [2024-06-27 17:55:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:57,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:57,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:57,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:57,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 309 transitions, 3664 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:57,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:57,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:57,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:57,706 INFO L124 PetriNetUnfolderBase]: 3322/5467 cut-off events. [2024-06-27 17:55:57,706 INFO L125 PetriNetUnfolderBase]: For 158710/158713 co-relation queries the response was YES. [2024-06-27 17:55:57,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29550 conditions, 5467 events. 3322/5467 cut-off events. For 158710/158713 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 36908 event pairs, 607 based on Foata normal form. 3/5460 useless extension candidates. Maximal degree in co-relation 29438. Up to 4717 conditions per place. [2024-06-27 17:55:57,755 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 228 selfloop transitions, 91 changer transitions 0/333 dead transitions. [2024-06-27 17:55:57,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 333 transitions, 4358 flow [2024-06-27 17:55:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:55:57,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 17:55:57,756 INFO L175 Difference]: Start difference. First operand has 267 places, 309 transitions, 3664 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:55:57,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 333 transitions, 4358 flow [2024-06-27 17:55:58,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 333 transitions, 4132 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:58,095 INFO L231 Difference]: Finished difference. Result has 267 places, 309 transitions, 3630 flow [2024-06-27 17:55:58,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3630, PETRI_PLACES=267, PETRI_TRANSITIONS=309} [2024-06-27 17:55:58,096 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-27 17:55:58,096 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 309 transitions, 3630 flow [2024-06-27 17:55:58,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:58,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:58,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:58,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:55:58,096 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 17:55:58,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:58,097 INFO L85 PathProgramCache]: Analyzing trace with hash 494566359, now seen corresponding path program 2 times [2024-06-27 17:55:58,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:58,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807925877] [2024-06-27 17:55:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:58,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:58,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:58,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807925877] [2024-06-27 17:55:58,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807925877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:58,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:58,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:58,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568606149] [2024-06-27 17:55:58,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:58,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:58,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:58,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:58,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 309 transitions, 3630 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:58,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:58,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:58,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:58,877 INFO L124 PetriNetUnfolderBase]: 3237/5361 cut-off events. [2024-06-27 17:55:58,877 INFO L125 PetriNetUnfolderBase]: For 166356/166356 co-relation queries the response was YES. [2024-06-27 17:55:58,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28929 conditions, 5361 events. 3237/5361 cut-off events. For 166356/166356 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36334 event pairs, 568 based on Foata normal form. 10/5318 useless extension candidates. Maximal degree in co-relation 28819. Up to 4374 conditions per place. [2024-06-27 17:55:58,927 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 240 selfloop transitions, 38 changer transitions 0/338 dead transitions. [2024-06-27 17:55:58,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 338 transitions, 4286 flow [2024-06-27 17:55:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:55:58,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:58,929 INFO L175 Difference]: Start difference. First operand has 267 places, 309 transitions, 3630 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:55:58,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 338 transitions, 4286 flow [2024-06-27 17:55:59,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 338 transitions, 4048 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:59,383 INFO L231 Difference]: Finished difference. Result has 267 places, 310 transitions, 3494 flow [2024-06-27 17:55:59,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3494, PETRI_PLACES=267, PETRI_TRANSITIONS=310} [2024-06-27 17:55:59,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-27 17:55:59,384 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 310 transitions, 3494 flow [2024-06-27 17:55:59,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:59,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:59,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:59,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:55:59,384 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 17:55:59,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 926230905, now seen corresponding path program 3 times [2024-06-27 17:55:59,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:59,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567955686] [2024-06-27 17:55:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:59,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:59,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:59,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567955686] [2024-06-27 17:55:59,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567955686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:59,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:59,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:59,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031831973] [2024-06-27 17:55:59,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:59,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:59,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:59,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:59,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:59,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:59,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 310 transitions, 3494 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:59,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:59,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:59,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:00,198 INFO L124 PetriNetUnfolderBase]: 3302/5469 cut-off events. [2024-06-27 17:56:00,199 INFO L125 PetriNetUnfolderBase]: For 167043/167043 co-relation queries the response was YES. [2024-06-27 17:56:00,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29270 conditions, 5469 events. 3302/5469 cut-off events. For 167043/167043 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37177 event pairs, 458 based on Foata normal form. 9/5421 useless extension candidates. Maximal degree in co-relation 29161. Up to 4528 conditions per place. [2024-06-27 17:56:00,250 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 249 selfloop transitions, 30 changer transitions 0/339 dead transitions. [2024-06-27 17:56:00,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 339 transitions, 4156 flow [2024-06-27 17:56:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-27 17:56:00,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:56:00,251 INFO L175 Difference]: Start difference. First operand has 267 places, 310 transitions, 3494 flow. Second operand 5 states and 160 transitions. [2024-06-27 17:56:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 339 transitions, 4156 flow [2024-06-27 17:56:00,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 339 transitions, 4078 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:00,664 INFO L231 Difference]: Finished difference. Result has 268 places, 311 transitions, 3506 flow [2024-06-27 17:56:00,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3506, PETRI_PLACES=268, PETRI_TRANSITIONS=311} [2024-06-27 17:56:00,665 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 218 predicate places. [2024-06-27 17:56:00,665 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 311 transitions, 3506 flow [2024-06-27 17:56:00,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:00,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:00,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:00,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:56:00,665 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 17:56:00,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash 941468025, now seen corresponding path program 4 times [2024-06-27 17:56:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:00,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214287090] [2024-06-27 17:56:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:00,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:00,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214287090] [2024-06-27 17:56:00,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214287090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:00,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:00,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:00,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474655383] [2024-06-27 17:56:00,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:00,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:00,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:00,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:00,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 311 transitions, 3506 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:00,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:00,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:00,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:01,519 INFO L124 PetriNetUnfolderBase]: 3313/5632 cut-off events. [2024-06-27 17:56:01,520 INFO L125 PetriNetUnfolderBase]: For 159278/159284 co-relation queries the response was YES. [2024-06-27 17:56:01,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29169 conditions, 5632 events. 3313/5632 cut-off events. For 159278/159284 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39443 event pairs, 956 based on Foata normal form. 14/5549 useless extension candidates. Maximal degree in co-relation 29059. Up to 4499 conditions per place. [2024-06-27 17:56:01,571 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 253 selfloop transitions, 33 changer transitions 0/346 dead transitions. [2024-06-27 17:56:01,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 346 transitions, 4206 flow [2024-06-27 17:56:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:56:01,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.677536231884058 [2024-06-27 17:56:01,575 INFO L175 Difference]: Start difference. First operand has 268 places, 311 transitions, 3506 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:56:01,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 346 transitions, 4206 flow [2024-06-27 17:56:01,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 346 transitions, 4152 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:01,987 INFO L231 Difference]: Finished difference. Result has 271 places, 312 transitions, 3540 flow [2024-06-27 17:56:01,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3540, PETRI_PLACES=271, PETRI_TRANSITIONS=312} [2024-06-27 17:56:01,988 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 221 predicate places. [2024-06-27 17:56:01,988 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 312 transitions, 3540 flow [2024-06-27 17:56:01,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:01,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:01,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:01,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:56:01,988 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 17:56:01,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 85946723, now seen corresponding path program 1 times [2024-06-27 17:56:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:01,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659525808] [2024-06-27 17:56:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:02,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:02,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659525808] [2024-06-27 17:56:02,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659525808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:02,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:02,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:02,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902385904] [2024-06-27 17:56:02,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:02,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:02,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:02,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 312 transitions, 3540 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:02,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:02,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:02,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:02,870 INFO L124 PetriNetUnfolderBase]: 3467/5918 cut-off events. [2024-06-27 17:56:02,871 INFO L125 PetriNetUnfolderBase]: For 178661/178673 co-relation queries the response was YES. [2024-06-27 17:56:02,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31112 conditions, 5918 events. 3467/5918 cut-off events. For 178661/178673 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41846 event pairs, 1068 based on Foata normal form. 20/5887 useless extension candidates. Maximal degree in co-relation 31001. Up to 4759 conditions per place. [2024-06-27 17:56:02,925 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 257 selfloop transitions, 44 changer transitions 0/352 dead transitions. [2024-06-27 17:56:02,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 352 transitions, 4402 flow [2024-06-27 17:56:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:56:02,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:56:02,927 INFO L175 Difference]: Start difference. First operand has 271 places, 312 transitions, 3540 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:56:02,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 352 transitions, 4402 flow [2024-06-27 17:56:03,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 352 transitions, 4328 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:03,416 INFO L231 Difference]: Finished difference. Result has 274 places, 314 transitions, 3588 flow [2024-06-27 17:56:03,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3588, PETRI_PLACES=274, PETRI_TRANSITIONS=314} [2024-06-27 17:56:03,416 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 224 predicate places. [2024-06-27 17:56:03,417 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 314 transitions, 3588 flow [2024-06-27 17:56:03,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:03,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:03,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:03,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:56:03,417 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 17:56:03,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash 86064833, now seen corresponding path program 2 times [2024-06-27 17:56:03,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:03,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203619115] [2024-06-27 17:56:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:03,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:03,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:03,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203619115] [2024-06-27 17:56:03,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203619115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:03,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:03,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:03,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441638557] [2024-06-27 17:56:03,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:03,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:03,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:03,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:03,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 314 transitions, 3588 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:03,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:03,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:03,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:04,273 INFO L124 PetriNetUnfolderBase]: 3537/5881 cut-off events. [2024-06-27 17:56:04,273 INFO L125 PetriNetUnfolderBase]: For 186089/186095 co-relation queries the response was YES. [2024-06-27 17:56:04,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31604 conditions, 5881 events. 3537/5881 cut-off events. For 186089/186095 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40699 event pairs, 612 based on Foata normal form. 9/5881 useless extension candidates. Maximal degree in co-relation 31492. Up to 4990 conditions per place. [2024-06-27 17:56:04,328 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 253 selfloop transitions, 42 changer transitions 0/346 dead transitions. [2024-06-27 17:56:04,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 346 transitions, 4286 flow [2024-06-27 17:56:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:56:04,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 17:56:04,329 INFO L175 Difference]: Start difference. First operand has 274 places, 314 transitions, 3588 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:56:04,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 346 transitions, 4286 flow [2024-06-27 17:56:04,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 346 transitions, 4231 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:04,819 INFO L231 Difference]: Finished difference. Result has 278 places, 315 transitions, 3641 flow [2024-06-27 17:56:04,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3641, PETRI_PLACES=278, PETRI_TRANSITIONS=315} [2024-06-27 17:56:04,820 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 228 predicate places. [2024-06-27 17:56:04,820 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 315 transitions, 3641 flow [2024-06-27 17:56:04,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:04,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:04,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:04,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:56:04,820 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 17:56:04,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash 201356003, now seen corresponding path program 3 times [2024-06-27 17:56:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:04,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73617800] [2024-06-27 17:56:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:04,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:04,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73617800] [2024-06-27 17:56:04,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73617800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:04,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:04,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:04,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952765406] [2024-06-27 17:56:04,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:04,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:04,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:04,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:04,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 315 transitions, 3641 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:04,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:04,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:04,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:05,702 INFO L124 PetriNetUnfolderBase]: 3615/5999 cut-off events. [2024-06-27 17:56:05,702 INFO L125 PetriNetUnfolderBase]: For 192970/192970 co-relation queries the response was YES. [2024-06-27 17:56:05,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32541 conditions, 5999 events. 3615/5999 cut-off events. For 192970/192970 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 41723 event pairs, 620 based on Foata normal form. 10/6000 useless extension candidates. Maximal degree in co-relation 32427. Up to 5129 conditions per place. [2024-06-27 17:56:05,760 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 263 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2024-06-27 17:56:05,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 344 transitions, 4329 flow [2024-06-27 17:56:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:56:05,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 17:56:05,761 INFO L175 Difference]: Start difference. First operand has 278 places, 315 transitions, 3641 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:56:05,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 344 transitions, 4329 flow [2024-06-27 17:56:06,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 344 transitions, 4245 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:06,246 INFO L231 Difference]: Finished difference. Result has 280 places, 316 transitions, 3643 flow [2024-06-27 17:56:06,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3643, PETRI_PLACES=280, PETRI_TRANSITIONS=316} [2024-06-27 17:56:06,246 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 230 predicate places. [2024-06-27 17:56:06,247 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 316 transitions, 3643 flow [2024-06-27 17:56:06,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:06,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:06,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:06,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:56:06,247 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 17:56:06,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash 201540701, now seen corresponding path program 1 times [2024-06-27 17:56:06,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:06,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483485358] [2024-06-27 17:56:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:06,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:06,342 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 17:56:06,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:06,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483485358] [2024-06-27 17:56:06,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483485358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:06,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:06,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:06,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232928078] [2024-06-27 17:56:06,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:06,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:06,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:06,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:06,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 316 transitions, 3643 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:06,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:06,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:06,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:07,146 INFO L124 PetriNetUnfolderBase]: 3809/6211 cut-off events. [2024-06-27 17:56:07,147 INFO L125 PetriNetUnfolderBase]: For 183684/183684 co-relation queries the response was YES. [2024-06-27 17:56:07,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33600 conditions, 6211 events. 3809/6211 cut-off events. For 183684/183684 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42572 event pairs, 661 based on Foata normal form. 2/6209 useless extension candidates. Maximal degree in co-relation 33485. Up to 5638 conditions per place. [2024-06-27 17:56:07,211 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 302 selfloop transitions, 27 changer transitions 0/343 dead transitions. [2024-06-27 17:56:07,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 343 transitions, 4391 flow [2024-06-27 17:56:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:56:07,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-27 17:56:07,213 INFO L175 Difference]: Start difference. First operand has 280 places, 316 transitions, 3643 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:56:07,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 343 transitions, 4391 flow [2024-06-27 17:56:07,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 343 transitions, 4329 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:07,735 INFO L231 Difference]: Finished difference. Result has 282 places, 318 transitions, 3678 flow [2024-06-27 17:56:07,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3678, PETRI_PLACES=282, PETRI_TRANSITIONS=318} [2024-06-27 17:56:07,735 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 232 predicate places. [2024-06-27 17:56:07,735 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 318 transitions, 3678 flow [2024-06-27 17:56:07,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:07,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:07,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:07,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:56:07,736 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 17:56:07,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 704818241, now seen corresponding path program 4 times [2024-06-27 17:56:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:07,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108016206] [2024-06-27 17:56:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:07,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:07,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108016206] [2024-06-27 17:56:07,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108016206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:07,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:07,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:07,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836741032] [2024-06-27 17:56:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:07,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:07,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:07,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:07,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:07,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 318 transitions, 3678 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:07,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:07,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:07,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:08,736 INFO L124 PetriNetUnfolderBase]: 3616/6005 cut-off events. [2024-06-27 17:56:08,736 INFO L125 PetriNetUnfolderBase]: For 185494/185494 co-relation queries the response was YES. [2024-06-27 17:56:08,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32061 conditions, 6005 events. 3616/6005 cut-off events. For 185494/185494 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 41791 event pairs, 569 based on Foata normal form. 10/6006 useless extension candidates. Maximal degree in co-relation 31945. Up to 4984 conditions per place. [2024-06-27 17:56:08,784 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 258 selfloop transitions, 40 changer transitions 0/349 dead transitions. [2024-06-27 17:56:08,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 349 transitions, 4368 flow [2024-06-27 17:56:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:56:08,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:56:08,785 INFO L175 Difference]: Start difference. First operand has 282 places, 318 transitions, 3678 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:56:08,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 349 transitions, 4368 flow [2024-06-27 17:56:09,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 349 transitions, 4285 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:09,319 INFO L231 Difference]: Finished difference. Result has 283 places, 318 transitions, 3688 flow [2024-06-27 17:56:09,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3688, PETRI_PLACES=283, PETRI_TRANSITIONS=318} [2024-06-27 17:56:09,320 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-06-27 17:56:09,320 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 318 transitions, 3688 flow [2024-06-27 17:56:09,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:09,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:09,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:09,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:56:09,320 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 17:56:09,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:09,321 INFO L85 PathProgramCache]: Analyzing trace with hash 711259049, now seen corresponding path program 2 times [2024-06-27 17:56:09,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:09,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316097226] [2024-06-27 17:56:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:09,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316097226] [2024-06-27 17:56:09,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316097226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:09,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:09,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:09,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631419317] [2024-06-27 17:56:09,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:09,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:09,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:09,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:09,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 318 transitions, 3688 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:09,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:09,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:09,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:10,242 INFO L124 PetriNetUnfolderBase]: 3804/6430 cut-off events. [2024-06-27 17:56:10,242 INFO L125 PetriNetUnfolderBase]: For 178505/178505 co-relation queries the response was YES. [2024-06-27 17:56:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33421 conditions, 6430 events. 3804/6430 cut-off events. For 178505/178505 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45617 event pairs, 1316 based on Foata normal form. 2/6369 useless extension candidates. Maximal degree in co-relation 33304. Up to 5613 conditions per place. [2024-06-27 17:56:10,306 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 298 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-27 17:56:10,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 339 transitions, 4420 flow [2024-06-27 17:56:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:56:10,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347826086956522 [2024-06-27 17:56:10,307 INFO L175 Difference]: Start difference. First operand has 283 places, 318 transitions, 3688 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:56:10,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 339 transitions, 4420 flow [2024-06-27 17:56:10,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 339 transitions, 4332 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:10,830 INFO L231 Difference]: Finished difference. Result has 283 places, 320 transitions, 3705 flow [2024-06-27 17:56:10,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3705, PETRI_PLACES=283, PETRI_TRANSITIONS=320} [2024-06-27 17:56:10,830 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-06-27 17:56:10,830 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 320 transitions, 3705 flow [2024-06-27 17:56:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:10,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:10,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:56:10,831 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 17:56:10,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1927896365, now seen corresponding path program 3 times [2024-06-27 17:56:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927801252] [2024-06-27 17:56:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:10,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:10,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927801252] [2024-06-27 17:56:10,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927801252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:10,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:10,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695347936] [2024-06-27 17:56:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:10,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:10,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:10,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:10,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 320 transitions, 3705 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:10,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:10,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:11,735 INFO L124 PetriNetUnfolderBase]: 3799/6222 cut-off events. [2024-06-27 17:56:11,735 INFO L125 PetriNetUnfolderBase]: For 171898/171901 co-relation queries the response was YES. [2024-06-27 17:56:11,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33002 conditions, 6222 events. 3799/6222 cut-off events. For 171898/171901 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42946 event pairs, 645 based on Foata normal form. 4/6212 useless extension candidates. Maximal degree in co-relation 32884. Up to 5574 conditions per place. [2024-06-27 17:56:11,798 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 297 selfloop transitions, 28 changer transitions 0/339 dead transitions. [2024-06-27 17:56:11,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 339 transitions, 4435 flow [2024-06-27 17:56:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 17:56:11,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-06-27 17:56:11,800 INFO L175 Difference]: Start difference. First operand has 283 places, 320 transitions, 3705 flow. Second operand 5 states and 143 transitions. [2024-06-27 17:56:11,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 339 transitions, 4435 flow [2024-06-27 17:56:12,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 339 transitions, 4348 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:12,558 INFO L231 Difference]: Finished difference. Result has 285 places, 322 transitions, 3725 flow [2024-06-27 17:56:12,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3725, PETRI_PLACES=285, PETRI_TRANSITIONS=322} [2024-06-27 17:56:12,559 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-06-27 17:56:12,559 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 322 transitions, 3725 flow [2024-06-27 17:56:12,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:12,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:12,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:56:12,560 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:12,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash 829148931, now seen corresponding path program 1 times [2024-06-27 17:56:12,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:12,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411253909] [2024-06-27 17:56:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:12,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:12,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411253909] [2024-06-27 17:56:12,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411253909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:12,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:12,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696034421] [2024-06-27 17:56:12,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:12,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:12,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:12,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2024-06-27 17:56:12,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 322 transitions, 3725 flow. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:12,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:12,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2024-06-27 17:56:12,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:13,327 INFO L124 PetriNetUnfolderBase]: 2521/4778 cut-off events. [2024-06-27 17:56:13,328 INFO L125 PetriNetUnfolderBase]: For 116336/120839 co-relation queries the response was YES. [2024-06-27 17:56:13,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20411 conditions, 4778 events. 2521/4778 cut-off events. For 116336/120839 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40268 event pairs, 719 based on Foata normal form. 161/4255 useless extension candidates. Maximal degree in co-relation 20292. Up to 1442 conditions per place. [2024-06-27 17:56:13,375 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 23 selfloop transitions, 46 changer transitions 93/425 dead transitions. [2024-06-27 17:56:13,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 425 transitions, 4883 flow [2024-06-27 17:56:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-27 17:56:13,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6832298136645962 [2024-06-27 17:56:13,376 INFO L175 Difference]: Start difference. First operand has 285 places, 322 transitions, 3725 flow. Second operand 7 states and 220 transitions. [2024-06-27 17:56:13,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 425 transitions, 4883 flow [2024-06-27 17:56:13,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 425 transitions, 4796 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:13,742 INFO L231 Difference]: Finished difference. Result has 293 places, 324 transitions, 3792 flow [2024-06-27 17:56:13,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3792, PETRI_PLACES=293, PETRI_TRANSITIONS=324} [2024-06-27 17:56:13,743 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 243 predicate places. [2024-06-27 17:56:13,743 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 324 transitions, 3792 flow [2024-06-27 17:56:13,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:13,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:13,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:56:13,743 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 17:56:13,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1291684946, now seen corresponding path program 1 times [2024-06-27 17:56:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:13,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057042417] [2024-06-27 17:56:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:13,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:13,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057042417] [2024-06-27 17:56:13,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057042417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:13,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:13,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:13,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236818168] [2024-06-27 17:56:13,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:13,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:13,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:13,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:13,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 324 transitions, 3792 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:13,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:13,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:13,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:14,751 INFO L124 PetriNetUnfolderBase]: 3689/6282 cut-off events. [2024-06-27 17:56:14,751 INFO L125 PetriNetUnfolderBase]: For 174934/175059 co-relation queries the response was YES. [2024-06-27 17:56:14,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34067 conditions, 6282 events. 3689/6282 cut-off events. For 174934/175059 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44976 event pairs, 886 based on Foata normal form. 123/6358 useless extension candidates. Maximal degree in co-relation 33943. Up to 5031 conditions per place. [2024-06-27 17:56:14,812 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 226 selfloop transitions, 129 changer transitions 5/375 dead transitions. [2024-06-27 17:56:14,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 375 transitions, 5028 flow [2024-06-27 17:56:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:56:14,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:56:14,813 INFO L175 Difference]: Start difference. First operand has 293 places, 324 transitions, 3792 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:56:14,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 375 transitions, 5028 flow [2024-06-27 17:56:15,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 375 transitions, 4968 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:15,433 INFO L231 Difference]: Finished difference. Result has 296 places, 332 transitions, 4140 flow [2024-06-27 17:56:15,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4140, PETRI_PLACES=296, PETRI_TRANSITIONS=332} [2024-06-27 17:56:15,434 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 246 predicate places. [2024-06-27 17:56:15,434 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 332 transitions, 4140 flow [2024-06-27 17:56:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:15,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:15,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:15,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:56:15,435 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 17:56:15,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2034408534, now seen corresponding path program 2 times [2024-06-27 17:56:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671985679] [2024-06-27 17:56:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:15,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:15,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671985679] [2024-06-27 17:56:15,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671985679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:15,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:15,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:15,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406618606] [2024-06-27 17:56:15,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:15,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:15,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:15,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 332 transitions, 4140 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:15,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:15,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:15,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:16,384 INFO L124 PetriNetUnfolderBase]: 3530/5907 cut-off events. [2024-06-27 17:56:16,385 INFO L125 PetriNetUnfolderBase]: For 182295/182428 co-relation queries the response was YES. [2024-06-27 17:56:16,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33140 conditions, 5907 events. 3530/5907 cut-off events. For 182295/182428 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 40920 event pairs, 717 based on Foata normal form. 133/6003 useless extension candidates. Maximal degree in co-relation 33016. Up to 5038 conditions per place. [2024-06-27 17:56:16,555 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 260 selfloop transitions, 97 changer transitions 0/372 dead transitions. [2024-06-27 17:56:16,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 372 transitions, 5170 flow [2024-06-27 17:56:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:56:16,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 17:56:16,556 INFO L175 Difference]: Start difference. First operand has 296 places, 332 transitions, 4140 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:56:16,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 372 transitions, 5170 flow [2024-06-27 17:56:17,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 372 transitions, 5023 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:17,231 INFO L231 Difference]: Finished difference. Result has 299 places, 338 transitions, 4299 flow [2024-06-27 17:56:17,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4299, PETRI_PLACES=299, PETRI_TRANSITIONS=338} [2024-06-27 17:56:17,232 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 249 predicate places. [2024-06-27 17:56:17,232 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 338 transitions, 4299 flow [2024-06-27 17:56:17,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:17,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:17,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:17,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:56:17,232 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 17:56:17,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash -279580136, now seen corresponding path program 3 times [2024-06-27 17:56:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:17,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044284544] [2024-06-27 17:56:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:17,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:17,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044284544] [2024-06-27 17:56:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044284544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:17,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736119700] [2024-06-27 17:56:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:17,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:17,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:17,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:17,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 338 transitions, 4299 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:17,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:17,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:17,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:18,171 INFO L124 PetriNetUnfolderBase]: 3527/5913 cut-off events. [2024-06-27 17:56:18,172 INFO L125 PetriNetUnfolderBase]: For 185185/185318 co-relation queries the response was YES. [2024-06-27 17:56:18,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33332 conditions, 5913 events. 3527/5913 cut-off events. For 185185/185318 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41012 event pairs, 720 based on Foata normal form. 133/6010 useless extension candidates. Maximal degree in co-relation 33207. Up to 5035 conditions per place. [2024-06-27 17:56:18,230 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 264 selfloop transitions, 98 changer transitions 0/377 dead transitions. [2024-06-27 17:56:18,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 377 transitions, 5127 flow [2024-06-27 17:56:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-27 17:56:18,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 17:56:18,232 INFO L175 Difference]: Start difference. First operand has 299 places, 338 transitions, 4299 flow. Second operand 10 states and 276 transitions. [2024-06-27 17:56:18,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 377 transitions, 5127 flow [2024-06-27 17:56:18,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 377 transitions, 4975 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:18,919 INFO L231 Difference]: Finished difference. Result has 305 places, 338 transitions, 4349 flow [2024-06-27 17:56:18,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4349, PETRI_PLACES=305, PETRI_TRANSITIONS=338} [2024-06-27 17:56:18,919 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 255 predicate places. [2024-06-27 17:56:18,919 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 338 transitions, 4349 flow [2024-06-27 17:56:18,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:18,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:18,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:18,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:56:18,920 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 17:56:18,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash -838298710, now seen corresponding path program 4 times [2024-06-27 17:56:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:18,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274501226] [2024-06-27 17:56:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:18,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:19,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274501226] [2024-06-27 17:56:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274501226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:19,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:19,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167561557] [2024-06-27 17:56:19,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:19,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:19,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:19,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:19,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 338 transitions, 4349 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:19,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:19,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:19,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:19,908 INFO L124 PetriNetUnfolderBase]: 3566/6029 cut-off events. [2024-06-27 17:56:19,909 INFO L125 PetriNetUnfolderBase]: For 195744/195873 co-relation queries the response was YES. [2024-06-27 17:56:19,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34244 conditions, 6029 events. 3566/6029 cut-off events. For 195744/195873 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 42172 event pairs, 756 based on Foata normal form. 129/6115 useless extension candidates. Maximal degree in co-relation 34117. Up to 5043 conditions per place. [2024-06-27 17:56:19,972 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 259 selfloop transitions, 108 changer transitions 0/382 dead transitions. [2024-06-27 17:56:19,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 382 transitions, 5569 flow [2024-06-27 17:56:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:56:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:56:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-27 17:56:19,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6135265700483091 [2024-06-27 17:56:19,973 INFO L175 Difference]: Start difference. First operand has 305 places, 338 transitions, 4349 flow. Second operand 9 states and 254 transitions. [2024-06-27 17:56:19,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 382 transitions, 5569 flow [2024-06-27 17:56:20,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 382 transitions, 5365 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:20,733 INFO L231 Difference]: Finished difference. Result has 306 places, 347 transitions, 4530 flow [2024-06-27 17:56:20,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4530, PETRI_PLACES=306, PETRI_TRANSITIONS=347} [2024-06-27 17:56:20,734 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 256 predicate places. [2024-06-27 17:56:20,734 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 347 transitions, 4530 flow [2024-06-27 17:56:20,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:20,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:20,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:20,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:56:20,734 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 17:56:20,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash -838293130, now seen corresponding path program 5 times [2024-06-27 17:56:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:20,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502902602] [2024-06-27 17:56:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:20,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502902602] [2024-06-27 17:56:20,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502902602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:20,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:20,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:20,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503158842] [2024-06-27 17:56:20,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:20,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:20,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:20,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 347 transitions, 4530 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:20,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:20,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:20,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:21,770 INFO L124 PetriNetUnfolderBase]: 3577/6052 cut-off events. [2024-06-27 17:56:21,770 INFO L125 PetriNetUnfolderBase]: For 201334/201463 co-relation queries the response was YES. [2024-06-27 17:56:21,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34573 conditions, 6052 events. 3577/6052 cut-off events. For 201334/201463 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42437 event pairs, 755 based on Foata normal form. 129/6138 useless extension candidates. Maximal degree in co-relation 34444. Up to 5055 conditions per place. [2024-06-27 17:56:21,839 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 264 selfloop transitions, 112 changer transitions 0/391 dead transitions. [2024-06-27 17:56:21,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 391 transitions, 5704 flow [2024-06-27 17:56:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-27 17:56:21,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968379446640316 [2024-06-27 17:56:21,840 INFO L175 Difference]: Start difference. First operand has 306 places, 347 transitions, 4530 flow. Second operand 11 states and 302 transitions. [2024-06-27 17:56:21,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 391 transitions, 5704 flow [2024-06-27 17:56:22,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 391 transitions, 5450 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:22,704 INFO L231 Difference]: Finished difference. Result has 312 places, 350 transitions, 4556 flow [2024-06-27 17:56:22,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4556, PETRI_PLACES=312, PETRI_TRANSITIONS=350} [2024-06-27 17:56:22,717 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 262 predicate places. [2024-06-27 17:56:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 350 transitions, 4556 flow [2024-06-27 17:56:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:22,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:22,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:56:22,718 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 17:56:22,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 522734726, now seen corresponding path program 6 times [2024-06-27 17:56:22,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:22,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582801044] [2024-06-27 17:56:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:22,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:22,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:22,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582801044] [2024-06-27 17:56:22,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582801044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:22,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:22,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:22,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017941953] [2024-06-27 17:56:22,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:22,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:22,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:22,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:22,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:22,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:22,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 350 transitions, 4556 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:22,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:22,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:22,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:23,734 INFO L124 PetriNetUnfolderBase]: 3574/5999 cut-off events. [2024-06-27 17:56:23,734 INFO L125 PetriNetUnfolderBase]: For 202121/202254 co-relation queries the response was YES. [2024-06-27 17:56:23,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34423 conditions, 5999 events. 3574/5999 cut-off events. For 202121/202254 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 41806 event pairs, 720 based on Foata normal form. 133/6097 useless extension candidates. Maximal degree in co-relation 34293. Up to 5052 conditions per place. [2024-06-27 17:56:23,800 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 256 selfloop transitions, 116 changer transitions 0/387 dead transitions. [2024-06-27 17:56:23,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 387 transitions, 5532 flow [2024-06-27 17:56:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-27 17:56:23,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5956521739130435 [2024-06-27 17:56:23,802 INFO L175 Difference]: Start difference. First operand has 312 places, 350 transitions, 4556 flow. Second operand 10 states and 274 transitions. [2024-06-27 17:56:23,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 387 transitions, 5532 flow [2024-06-27 17:56:24,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 387 transitions, 5272 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:24,580 INFO L231 Difference]: Finished difference. Result has 313 places, 350 transitions, 4534 flow [2024-06-27 17:56:24,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4296, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4534, PETRI_PLACES=313, PETRI_TRANSITIONS=350} [2024-06-27 17:56:24,580 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-06-27 17:56:24,580 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 350 transitions, 4534 flow [2024-06-27 17:56:24,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:24,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:24,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:24,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:56:24,581 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 17:56:24,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash -472349394, now seen corresponding path program 7 times [2024-06-27 17:56:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350216445] [2024-06-27 17:56:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:24,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:24,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350216445] [2024-06-27 17:56:24,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350216445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:24,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:24,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:24,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398956764] [2024-06-27 17:56:24,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:24,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:24,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:24,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:24,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 350 transitions, 4534 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:24,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:24,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:25,641 INFO L124 PetriNetUnfolderBase]: 3599/6139 cut-off events. [2024-06-27 17:56:25,641 INFO L125 PetriNetUnfolderBase]: For 211174/211300 co-relation queries the response was YES. [2024-06-27 17:56:25,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34914 conditions, 6139 events. 3599/6139 cut-off events. For 211174/211300 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43328 event pairs, 769 based on Foata normal form. 127/6222 useless extension candidates. Maximal degree in co-relation 34783. Up to 4831 conditions per place. [2024-06-27 17:56:25,700 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 213 selfloop transitions, 163 changer transitions 0/391 dead transitions. [2024-06-27 17:56:25,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 391 transitions, 5754 flow [2024-06-27 17:56:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:56:25,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-27 17:56:25,701 INFO L175 Difference]: Start difference. First operand has 313 places, 350 transitions, 4534 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:56:25,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 391 transitions, 5754 flow [2024-06-27 17:56:26,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 391 transitions, 5531 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:26,333 INFO L231 Difference]: Finished difference. Result has 313 places, 356 transitions, 4747 flow [2024-06-27 17:56:26,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4747, PETRI_PLACES=313, PETRI_TRANSITIONS=356} [2024-06-27 17:56:26,334 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-06-27 17:56:26,334 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 356 transitions, 4747 flow [2024-06-27 17:56:26,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:26,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:26,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:26,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:56:26,334 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 17:56:26,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1372630388, now seen corresponding path program 8 times [2024-06-27 17:56:26,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:26,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481095989] [2024-06-27 17:56:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:26,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:26,432 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 17:56:26,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:26,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481095989] [2024-06-27 17:56:26,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481095989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:26,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264214076] [2024-06-27 17:56:26,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:26,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:26,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:26,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:26,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 356 transitions, 4747 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:26,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:26,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:26,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:27,300 INFO L124 PetriNetUnfolderBase]: 3610/6150 cut-off events. [2024-06-27 17:56:27,301 INFO L125 PetriNetUnfolderBase]: For 217581/217707 co-relation queries the response was YES. [2024-06-27 17:56:27,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35345 conditions, 6150 events. 3610/6150 cut-off events. For 217581/217707 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43392 event pairs, 779 based on Foata normal form. 127/6229 useless extension candidates. Maximal degree in co-relation 35213. Up to 4843 conditions per place. [2024-06-27 17:56:27,367 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 224 selfloop transitions, 156 changer transitions 0/395 dead transitions. [2024-06-27 17:56:27,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 395 transitions, 6073 flow [2024-06-27 17:56:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:56:27,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-27 17:56:27,369 INFO L175 Difference]: Start difference. First operand has 313 places, 356 transitions, 4747 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:56:27,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 395 transitions, 6073 flow [2024-06-27 17:56:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 395 transitions, 5787 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:28,058 INFO L231 Difference]: Finished difference. Result has 317 places, 359 transitions, 4837 flow [2024-06-27 17:56:28,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4837, PETRI_PLACES=317, PETRI_TRANSITIONS=359} [2024-06-27 17:56:28,059 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-06-27 17:56:28,059 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 359 transitions, 4837 flow [2024-06-27 17:56:28,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:28,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:28,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:28,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:56:28,060 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 17:56:28,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:28,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1627264210, now seen corresponding path program 9 times [2024-06-27 17:56:28,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:28,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698134329] [2024-06-27 17:56:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:28,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698134329] [2024-06-27 17:56:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698134329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:28,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082339651] [2024-06-27 17:56:28,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:28,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:28,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:28,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 359 transitions, 4837 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:28,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:28,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:28,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:29,131 INFO L124 PetriNetUnfolderBase]: 3635/6105 cut-off events. [2024-06-27 17:56:29,131 INFO L125 PetriNetUnfolderBase]: For 224317/224447 co-relation queries the response was YES. [2024-06-27 17:56:29,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35603 conditions, 6105 events. 3635/6105 cut-off events. For 224317/224447 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42672 event pairs, 723 based on Foata normal form. 131/6197 useless extension candidates. Maximal degree in co-relation 35470. Up to 4870 conditions per place. [2024-06-27 17:56:29,182 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 212 selfloop transitions, 170 changer transitions 0/397 dead transitions. [2024-06-27 17:56:29,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 397 transitions, 6059 flow [2024-06-27 17:56:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:56:29,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 17:56:29,183 INFO L175 Difference]: Start difference. First operand has 317 places, 359 transitions, 4837 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:56:29,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 397 transitions, 6059 flow [2024-06-27 17:56:29,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 397 transitions, 5551 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:29,881 INFO L231 Difference]: Finished difference. Result has 318 places, 365 transitions, 4769 flow [2024-06-27 17:56:29,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4769, PETRI_PLACES=318, PETRI_TRANSITIONS=365} [2024-06-27 17:56:29,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 268 predicate places. [2024-06-27 17:56:29,882 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 365 transitions, 4769 flow [2024-06-27 17:56:29,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:29,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:29,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:29,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:56:29,883 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 17:56:29,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1368905738, now seen corresponding path program 10 times [2024-06-27 17:56:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:29,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384958075] [2024-06-27 17:56:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:29,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:29,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:29,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384958075] [2024-06-27 17:56:29,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384958075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:29,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655033053] [2024-06-27 17:56:29,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:29,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:29,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:29,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:30,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:30,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 365 transitions, 4769 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:30,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:30,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:30,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:30,893 INFO L124 PetriNetUnfolderBase]: 3646/6095 cut-off events. [2024-06-27 17:56:30,893 INFO L125 PetriNetUnfolderBase]: For 226836/226966 co-relation queries the response was YES. [2024-06-27 17:56:30,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35604 conditions, 6095 events. 3646/6095 cut-off events. For 226836/226966 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42384 event pairs, 721 based on Foata normal form. 131/6187 useless extension candidates. Maximal degree in co-relation 35470. Up to 5196 conditions per place. [2024-06-27 17:56:30,958 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 292 selfloop transitions, 98 changer transitions 0/405 dead transitions. [2024-06-27 17:56:30,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 405 transitions, 5835 flow [2024-06-27 17:56:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-27 17:56:30,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5956521739130435 [2024-06-27 17:56:30,960 INFO L175 Difference]: Start difference. First operand has 318 places, 365 transitions, 4769 flow. Second operand 10 states and 274 transitions. [2024-06-27 17:56:30,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 405 transitions, 5835 flow [2024-06-27 17:56:31,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 405 transitions, 5558 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:31,937 INFO L231 Difference]: Finished difference. Result has 324 places, 368 transitions, 4740 flow [2024-06-27 17:56:31,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4740, PETRI_PLACES=324, PETRI_TRANSITIONS=368} [2024-06-27 17:56:31,938 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 274 predicate places. [2024-06-27 17:56:31,938 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 368 transitions, 4740 flow [2024-06-27 17:56:31,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:31,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:31,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:31,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:56:31,939 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:31,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1368911318, now seen corresponding path program 11 times [2024-06-27 17:56:31,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:31,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037481509] [2024-06-27 17:56:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:31,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:32,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037481509] [2024-06-27 17:56:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037481509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:32,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:32,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:32,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305865613] [2024-06-27 17:56:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:32,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:32,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:32,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 368 transitions, 4740 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:32,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:32,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:32,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:32,968 INFO L124 PetriNetUnfolderBase]: 3643/6100 cut-off events. [2024-06-27 17:56:32,968 INFO L125 PetriNetUnfolderBase]: For 229326/229456 co-relation queries the response was YES. [2024-06-27 17:56:33,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35334 conditions, 6100 events. 3643/6100 cut-off events. For 229326/229456 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42563 event pairs, 726 based on Foata normal form. 131/6191 useless extension candidates. Maximal degree in co-relation 35199. Up to 5193 conditions per place. [2024-06-27 17:56:33,035 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 286 selfloop transitions, 97 changer transitions 0/398 dead transitions. [2024-06-27 17:56:33,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 398 transitions, 5586 flow [2024-06-27 17:56:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:56:33,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 17:56:33,036 INFO L175 Difference]: Start difference. First operand has 324 places, 368 transitions, 4740 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:56:33,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 398 transitions, 5586 flow [2024-06-27 17:56:33,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 398 transitions, 5322 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:33,979 INFO L231 Difference]: Finished difference. Result has 323 places, 368 transitions, 4676 flow [2024-06-27 17:56:33,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=323, PETRI_TRANSITIONS=368} [2024-06-27 17:56:33,980 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-06-27 17:56:33,980 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 368 transitions, 4676 flow [2024-06-27 17:56:33,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:33,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:33,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:33,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:56:33,981 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:33,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash -567820084, now seen corresponding path program 12 times [2024-06-27 17:56:33,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:33,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121075735] [2024-06-27 17:56:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:33,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121075735] [2024-06-27 17:56:34,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121075735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:34,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:34,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:34,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044136891] [2024-06-27 17:56:34,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:34,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:34,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:34,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 368 transitions, 4676 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:34,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:34,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:34,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:35,168 INFO L124 PetriNetUnfolderBase]: 3640/6230 cut-off events. [2024-06-27 17:56:35,168 INFO L125 PetriNetUnfolderBase]: For 232577/232690 co-relation queries the response was YES. [2024-06-27 17:56:35,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35392 conditions, 6230 events. 3640/6230 cut-off events. For 232577/232690 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44238 event pairs, 998 based on Foata normal form. 114/6299 useless extension candidates. Maximal degree in co-relation 35256. Up to 5336 conditions per place. [2024-06-27 17:56:35,235 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 338 selfloop transitions, 45 changer transitions 0/398 dead transitions. [2024-06-27 17:56:35,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 398 transitions, 5522 flow [2024-06-27 17:56:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:56:35,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 17:56:35,236 INFO L175 Difference]: Start difference. First operand has 323 places, 368 transitions, 4676 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:56:35,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 398 transitions, 5522 flow [2024-06-27 17:56:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 398 transitions, 5312 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:35,996 INFO L231 Difference]: Finished difference. Result has 324 places, 368 transitions, 4562 flow [2024-06-27 17:56:35,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=324, PETRI_TRANSITIONS=368} [2024-06-27 17:56:35,996 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 274 predicate places. [2024-06-27 17:56:35,996 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 368 transitions, 4562 flow [2024-06-27 17:56:35,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:35,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:35,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:56:35,997 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:35,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1946762060, now seen corresponding path program 13 times [2024-06-27 17:56:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:35,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592169886] [2024-06-27 17:56:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:36,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592169886] [2024-06-27 17:56:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592169886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:36,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:36,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:36,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107370501] [2024-06-27 17:56:36,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:36,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:36,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:36,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:36,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 368 transitions, 4562 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:36,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:36,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:36,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:37,037 INFO L124 PetriNetUnfolderBase]: 3679/6248 cut-off events. [2024-06-27 17:56:37,037 INFO L125 PetriNetUnfolderBase]: For 243736/243862 co-relation queries the response was YES. [2024-06-27 17:56:37,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35671 conditions, 6248 events. 3679/6248 cut-off events. For 243736/243862 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 44245 event pairs, 773 based on Foata normal form. 127/6328 useless extension candidates. Maximal degree in co-relation 35534. Up to 5158 conditions per place. [2024-06-27 17:56:37,111 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 272 selfloop transitions, 119 changer transitions 0/406 dead transitions. [2024-06-27 17:56:37,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 406 transitions, 5845 flow [2024-06-27 17:56:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:56:37,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 17:56:37,113 INFO L175 Difference]: Start difference. First operand has 324 places, 368 transitions, 4562 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:56:37,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 406 transitions, 5845 flow [2024-06-27 17:56:37,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 406 transitions, 5617 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 17:56:37,976 INFO L231 Difference]: Finished difference. Result has 323 places, 377 transitions, 4754 flow [2024-06-27 17:56:37,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4754, PETRI_PLACES=323, PETRI_TRANSITIONS=377} [2024-06-27 17:56:37,977 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-06-27 17:56:37,977 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 377 transitions, 4754 flow [2024-06-27 17:56:37,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:37,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:37,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:37,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:56:37,978 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:37,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1283665640, now seen corresponding path program 14 times [2024-06-27 17:56:37,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:37,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824341321] [2024-06-27 17:56:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:37,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:38,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:38,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824341321] [2024-06-27 17:56:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824341321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579778247] [2024-06-27 17:56:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:38,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:38,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:38,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:38,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 377 transitions, 4754 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:38,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:38,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:39,091 INFO L124 PetriNetUnfolderBase]: 3690/6218 cut-off events. [2024-06-27 17:56:39,091 INFO L125 PetriNetUnfolderBase]: For 247598/247730 co-relation queries the response was YES. [2024-06-27 17:56:39,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36170 conditions, 6218 events. 3690/6218 cut-off events. For 247598/247730 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 43584 event pairs, 739 based on Foata normal form. 133/6316 useless extension candidates. Maximal degree in co-relation 36032. Up to 5435 conditions per place. [2024-06-27 17:56:39,159 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 359 selfloop transitions, 40 changer transitions 0/414 dead transitions. [2024-06-27 17:56:39,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 414 transitions, 5848 flow [2024-06-27 17:56:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-27 17:56:39,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826086956521739 [2024-06-27 17:56:39,160 INFO L175 Difference]: Start difference. First operand has 323 places, 377 transitions, 4754 flow. Second operand 10 states and 268 transitions. [2024-06-27 17:56:39,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 414 transitions, 5848 flow [2024-06-27 17:56:40,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 414 transitions, 5702 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:40,071 INFO L231 Difference]: Finished difference. Result has 330 places, 380 transitions, 4756 flow [2024-06-27 17:56:40,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4756, PETRI_PLACES=330, PETRI_TRANSITIONS=380} [2024-06-27 17:56:40,072 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 280 predicate places. [2024-06-27 17:56:40,072 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 380 transitions, 4756 flow [2024-06-27 17:56:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:40,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:40,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:40,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:56:40,072 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:40,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash 864121198, now seen corresponding path program 15 times [2024-06-27 17:56:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912721151] [2024-06-27 17:56:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:40,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912721151] [2024-06-27 17:56:40,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912721151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:40,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:40,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:40,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786260764] [2024-06-27 17:56:40,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:40,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:40,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:40,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 380 transitions, 4756 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:40,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:40,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:40,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:41,196 INFO L124 PetriNetUnfolderBase]: 3712/6258 cut-off events. [2024-06-27 17:56:41,197 INFO L125 PetriNetUnfolderBase]: For 252276/252408 co-relation queries the response was YES. [2024-06-27 17:56:41,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36544 conditions, 6258 events. 3712/6258 cut-off events. For 252276/252408 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44005 event pairs, 739 based on Foata normal form. 133/6356 useless extension candidates. Maximal degree in co-relation 36404. Up to 5455 conditions per place. [2024-06-27 17:56:41,268 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 365 selfloop transitions, 46 changer transitions 0/426 dead transitions. [2024-06-27 17:56:41,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 426 transitions, 5937 flow [2024-06-27 17:56:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:56:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:56:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 316 transitions. [2024-06-27 17:56:41,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-06-27 17:56:41,270 INFO L175 Difference]: Start difference. First operand has 330 places, 380 transitions, 4756 flow. Second operand 12 states and 316 transitions. [2024-06-27 17:56:41,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 426 transitions, 5937 flow [2024-06-27 17:56:42,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 426 transitions, 5809 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:42,241 INFO L231 Difference]: Finished difference. Result has 335 places, 386 transitions, 4827 flow [2024-06-27 17:56:42,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4827, PETRI_PLACES=335, PETRI_TRANSITIONS=386} [2024-06-27 17:56:42,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 285 predicate places. [2024-06-27 17:56:42,242 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 386 transitions, 4827 flow [2024-06-27 17:56:42,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:42,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:42,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:56:42,242 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:42,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1938493430, now seen corresponding path program 16 times [2024-06-27 17:56:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:42,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039802192] [2024-06-27 17:56:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:42,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:42,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:42,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039802192] [2024-06-27 17:56:42,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039802192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:42,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:42,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:42,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060800140] [2024-06-27 17:56:42,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:42,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:42,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:42,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:42,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 386 transitions, 4827 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:42,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:42,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:43,354 INFO L124 PetriNetUnfolderBase]: 3723/6273 cut-off events. [2024-06-27 17:56:43,354 INFO L125 PetriNetUnfolderBase]: For 258215/258345 co-relation queries the response was YES. [2024-06-27 17:56:43,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36686 conditions, 6273 events. 3723/6273 cut-off events. For 258215/258345 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44110 event pairs, 741 based on Foata normal form. 131/6363 useless extension candidates. Maximal degree in co-relation 36545. Up to 5202 conditions per place. [2024-06-27 17:56:43,425 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 277 selfloop transitions, 135 changer transitions 0/427 dead transitions. [2024-06-27 17:56:43,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 427 transitions, 6115 flow [2024-06-27 17:56:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 300 transitions. [2024-06-27 17:56:43,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928853754940712 [2024-06-27 17:56:43,427 INFO L175 Difference]: Start difference. First operand has 335 places, 386 transitions, 4827 flow. Second operand 11 states and 300 transitions. [2024-06-27 17:56:43,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 427 transitions, 6115 flow [2024-06-27 17:56:44,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 427 transitions, 6007 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:44,434 INFO L231 Difference]: Finished difference. Result has 337 places, 389 transitions, 5051 flow [2024-06-27 17:56:44,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5051, PETRI_PLACES=337, PETRI_TRANSITIONS=389} [2024-06-27 17:56:44,434 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-06-27 17:56:44,434 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 389 transitions, 5051 flow [2024-06-27 17:56:44,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:44,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:44,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:56:44,435 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:44,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1288761110, now seen corresponding path program 17 times [2024-06-27 17:56:44,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:44,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271835275] [2024-06-27 17:56:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:44,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:44,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:44,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271835275] [2024-06-27 17:56:44,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271835275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:44,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:44,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:44,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595440677] [2024-06-27 17:56:44,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:44,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:44,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:44,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:44,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 389 transitions, 5051 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:44,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:44,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:45,565 INFO L124 PetriNetUnfolderBase]: 3720/6340 cut-off events. [2024-06-27 17:56:45,565 INFO L125 PetriNetUnfolderBase]: For 263301/263414 co-relation queries the response was YES. [2024-06-27 17:56:45,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37106 conditions, 6340 events. 3720/6340 cut-off events. For 263301/263414 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45060 event pairs, 1009 based on Foata normal form. 114/6405 useless extension candidates. Maximal degree in co-relation 36964. Up to 5488 conditions per place. [2024-06-27 17:56:45,637 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 365 selfloop transitions, 36 changer transitions 0/416 dead transitions. [2024-06-27 17:56:45,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 416 transitions, 5925 flow [2024-06-27 17:56:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 17:56:45,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 17:56:45,639 INFO L175 Difference]: Start difference. First operand has 337 places, 389 transitions, 5051 flow. Second operand 8 states and 220 transitions. [2024-06-27 17:56:45,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 416 transitions, 5925 flow [2024-06-27 17:56:46,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 416 transitions, 5589 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:46,801 INFO L231 Difference]: Finished difference. Result has 336 places, 389 transitions, 4793 flow [2024-06-27 17:56:46,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4793, PETRI_PLACES=336, PETRI_TRANSITIONS=389} [2024-06-27 17:56:46,802 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 286 predicate places. [2024-06-27 17:56:46,802 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 389 transitions, 4793 flow [2024-06-27 17:56:46,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:46,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:46,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:46,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 17:56:46,802 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:46,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1297480790, now seen corresponding path program 18 times [2024-06-27 17:56:46,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:46,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051381796] [2024-06-27 17:56:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:46,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:46,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051381796] [2024-06-27 17:56:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051381796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:46,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:46,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969904690] [2024-06-27 17:56:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:46,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:46,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:46,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:46,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:46,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:46,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 389 transitions, 4793 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:46,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:46,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:46,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:47,848 INFO L124 PetriNetUnfolderBase]: 3717/6277 cut-off events. [2024-06-27 17:56:47,848 INFO L125 PetriNetUnfolderBase]: For 263187/263317 co-relation queries the response was YES. [2024-06-27 17:56:47,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36415 conditions, 6277 events. 3717/6277 cut-off events. For 263187/263317 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44300 event pairs, 745 based on Foata normal form. 131/6367 useless extension candidates. Maximal degree in co-relation 36273. Up to 5196 conditions per place. [2024-06-27 17:56:47,920 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 274 selfloop transitions, 133 changer transitions 0/422 dead transitions. [2024-06-27 17:56:47,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 422 transitions, 5695 flow [2024-06-27 17:56:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-06-27 17:56:47,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 17:56:47,921 INFO L175 Difference]: Start difference. First operand has 336 places, 389 transitions, 4793 flow. Second operand 10 states and 275 transitions. [2024-06-27 17:56:47,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 422 transitions, 5695 flow [2024-06-27 17:56:48,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 422 transitions, 5585 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:48,932 INFO L231 Difference]: Finished difference. Result has 338 places, 389 transitions, 4955 flow [2024-06-27 17:56:48,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4955, PETRI_PLACES=338, PETRI_TRANSITIONS=389} [2024-06-27 17:56:48,933 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 288 predicate places. [2024-06-27 17:56:48,933 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 389 transitions, 4955 flow [2024-06-27 17:56:48,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:48,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:48,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:48,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 17:56:48,933 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:48,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1737984070, now seen corresponding path program 19 times [2024-06-27 17:56:48,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:48,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285303652] [2024-06-27 17:56:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285303652] [2024-06-27 17:56:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285303652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:49,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:49,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403698877] [2024-06-27 17:56:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:49,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:49,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:49,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:49,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 389 transitions, 4955 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:49,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:49,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:49,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:50,056 INFO L124 PetriNetUnfolderBase]: 3770/6383 cut-off events. [2024-06-27 17:56:50,056 INFO L125 PetriNetUnfolderBase]: For 282028/282157 co-relation queries the response was YES. [2024-06-27 17:56:50,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37628 conditions, 6383 events. 3770/6383 cut-off events. For 282028/282157 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45160 event pairs, 750 based on Foata normal form. 129/6472 useless extension candidates. Maximal degree in co-relation 37485. Up to 5086 conditions per place. [2024-06-27 17:56:50,126 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 230 selfloop transitions, 200 changer transitions 0/445 dead transitions. [2024-06-27 17:56:50,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 6439 flow [2024-06-27 17:56:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 284 transitions. [2024-06-27 17:56:50,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6173913043478261 [2024-06-27 17:56:50,128 INFO L175 Difference]: Start difference. First operand has 338 places, 389 transitions, 4955 flow. Second operand 10 states and 284 transitions. [2024-06-27 17:56:50,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 6439 flow [2024-06-27 17:56:51,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 445 transitions, 6125 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 17:56:51,415 INFO L231 Difference]: Finished difference. Result has 338 places, 401 transitions, 5239 flow [2024-06-27 17:56:51,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5239, PETRI_PLACES=338, PETRI_TRANSITIONS=401} [2024-06-27 17:56:51,416 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 288 predicate places. [2024-06-27 17:56:51,416 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 401 transitions, 5239 flow [2024-06-27 17:56:51,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:51,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:51,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 17:56:51,416 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:51,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1351889188, now seen corresponding path program 20 times [2024-06-27 17:56:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002650505] [2024-06-27 17:56:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:51,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:51,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002650505] [2024-06-27 17:56:51,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002650505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:51,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:51,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:51,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280787462] [2024-06-27 17:56:51,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:51,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:51,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:51,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:51,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 401 transitions, 5239 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:51,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:51,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:51,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:52,529 INFO L124 PetriNetUnfolderBase]: 3767/6333 cut-off events. [2024-06-27 17:56:52,529 INFO L125 PetriNetUnfolderBase]: For 284024/284157 co-relation queries the response was YES. [2024-06-27 17:56:52,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37824 conditions, 6333 events. 3767/6333 cut-off events. For 284024/284157 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 44597 event pairs, 744 based on Foata normal form. 133/6424 useless extension candidates. Maximal degree in co-relation 37680. Up to 5308 conditions per place. [2024-06-27 17:56:52,600 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 108 changer transitions 0/438 dead transitions. [2024-06-27 17:56:52,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 438 transitions, 6345 flow [2024-06-27 17:56:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:56:52,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-06-27 17:56:52,601 INFO L175 Difference]: Start difference. First operand has 338 places, 401 transitions, 5239 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:56:52,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 438 transitions, 6345 flow [2024-06-27 17:56:53,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 438 transitions, 5887 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:53,863 INFO L231 Difference]: Finished difference. Result has 337 places, 401 transitions, 5013 flow [2024-06-27 17:56:53,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5013, PETRI_PLACES=337, PETRI_TRANSITIONS=401} [2024-06-27 17:56:53,864 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-06-27 17:56:53,864 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 401 transitions, 5013 flow [2024-06-27 17:56:53,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:53,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:53,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:53,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 17:56:53,864 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:53,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:53,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1405813208, now seen corresponding path program 21 times [2024-06-27 17:56:53,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:53,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778615557] [2024-06-27 17:56:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:53,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:53,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:53,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778615557] [2024-06-27 17:56:53,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778615557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:53,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:53,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652806945] [2024-06-27 17:56:53,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:53,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:53,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:54,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:54,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 401 transitions, 5013 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:54,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:54,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:54,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:55,005 INFO L124 PetriNetUnfolderBase]: 3778/6390 cut-off events. [2024-06-27 17:56:55,006 INFO L125 PetriNetUnfolderBase]: For 282804/282933 co-relation queries the response was YES. [2024-06-27 17:56:55,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37516 conditions, 6390 events. 3778/6390 cut-off events. For 282804/282933 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 45290 event pairs, 753 based on Foata normal form. 129/6476 useless extension candidates. Maximal degree in co-relation 37372. Up to 5095 conditions per place. [2024-06-27 17:56:55,067 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 242 selfloop transitions, 194 changer transitions 0/451 dead transitions. [2024-06-27 17:56:55,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 451 transitions, 6370 flow [2024-06-27 17:56:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:56:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:56:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-06-27 17:56:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497584541062802 [2024-06-27 17:56:55,068 INFO L175 Difference]: Start difference. First operand has 337 places, 401 transitions, 5013 flow. Second operand 9 states and 269 transitions. [2024-06-27 17:56:55,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 451 transitions, 6370 flow [2024-06-27 17:56:56,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 451 transitions, 6187 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:56:56,470 INFO L231 Difference]: Finished difference. Result has 340 places, 404 transitions, 5269 flow [2024-06-27 17:56:56,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5269, PETRI_PLACES=340, PETRI_TRANSITIONS=404} [2024-06-27 17:56:56,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 290 predicate places. [2024-06-27 17:56:56,470 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 404 transitions, 5269 flow [2024-06-27 17:56:56,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:56,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:56,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 17:56:56,471 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:56,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:56,471 INFO L85 PathProgramCache]: Analyzing trace with hash -372388664, now seen corresponding path program 22 times [2024-06-27 17:56:56,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:56,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953744352] [2024-06-27 17:56:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:56,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:56,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:56,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953744352] [2024-06-27 17:56:56,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953744352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:56,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:56,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:56,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31456262] [2024-06-27 17:56:56,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:56,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:56,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:56,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:56,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 404 transitions, 5269 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:56,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:56,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:57,571 INFO L124 PetriNetUnfolderBase]: 3775/6433 cut-off events. [2024-06-27 17:56:57,571 INFO L125 PetriNetUnfolderBase]: For 287286/287414 co-relation queries the response was YES. [2024-06-27 17:56:57,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37900 conditions, 6433 events. 3775/6433 cut-off events. For 287286/287414 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 45899 event pairs, 774 based on Foata normal form. 129/6521 useless extension candidates. Maximal degree in co-relation 37757. Up to 5320 conditions per place. [2024-06-27 17:56:57,643 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 321 selfloop transitions, 117 changer transitions 0/453 dead transitions. [2024-06-27 17:56:57,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 453 transitions, 6439 flow [2024-06-27 17:56:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:56:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:56:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-06-27 17:56:57,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545893719806763 [2024-06-27 17:56:57,644 INFO L175 Difference]: Start difference. First operand has 340 places, 404 transitions, 5269 flow. Second operand 9 states and 271 transitions. [2024-06-27 17:56:57,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 453 transitions, 6439 flow [2024-06-27 17:56:58,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 453 transitions, 6093 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:58,981 INFO L231 Difference]: Finished difference. Result has 341 places, 404 transitions, 5187 flow [2024-06-27 17:56:58,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5187, PETRI_PLACES=341, PETRI_TRANSITIONS=404} [2024-06-27 17:56:58,981 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 291 predicate places. [2024-06-27 17:56:58,981 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 404 transitions, 5187 flow [2024-06-27 17:56:58,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:58,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:58,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 17:56:58,982 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:58,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1745335720, now seen corresponding path program 23 times [2024-06-27 17:56:58,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:58,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276525311] [2024-06-27 17:56:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:58,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276525311] [2024-06-27 17:56:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276525311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:59,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588205646] [2024-06-27 17:56:59,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:59,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:59,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:59,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 404 transitions, 5187 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:59,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:00,064 INFO L124 PetriNetUnfolderBase]: 3772/6333 cut-off events. [2024-06-27 17:57:00,064 INFO L125 PetriNetUnfolderBase]: For 276234/276367 co-relation queries the response was YES. [2024-06-27 17:57:00,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37402 conditions, 6333 events. 3772/6333 cut-off events. For 276234/276367 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 44577 event pairs, 723 based on Foata normal form. 133/6428 useless extension candidates. Maximal degree in co-relation 37260. Up to 5089 conditions per place. [2024-06-27 17:57:00,135 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 244 selfloop transitions, 197 changer transitions 0/456 dead transitions. [2024-06-27 17:57:00,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 456 transitions, 6369 flow [2024-06-27 17:57:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2024-06-27 17:57:00,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245059288537549 [2024-06-27 17:57:00,136 INFO L175 Difference]: Start difference. First operand has 341 places, 404 transitions, 5187 flow. Second operand 11 states and 316 transitions. [2024-06-27 17:57:00,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 456 transitions, 6369 flow [2024-06-27 17:57:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 456 transitions, 6093 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:01,709 INFO L231 Difference]: Finished difference. Result has 343 places, 404 transitions, 5325 flow [2024-06-27 17:57:01,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5325, PETRI_PLACES=343, PETRI_TRANSITIONS=404} [2024-06-27 17:57:01,710 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 293 predicate places. [2024-06-27 17:57:01,710 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 404 transitions, 5325 flow [2024-06-27 17:57:01,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:01,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:01,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 17:57:01,711 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:01,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1961338320, now seen corresponding path program 24 times [2024-06-27 17:57:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:01,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171500618] [2024-06-27 17:57:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171500618] [2024-06-27 17:57:01,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171500618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:01,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498020877] [2024-06-27 17:57:01,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:01,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:01,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 404 transitions, 5325 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:01,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:02,851 INFO L124 PetriNetUnfolderBase]: 3805/6540 cut-off events. [2024-06-27 17:57:02,852 INFO L125 PetriNetUnfolderBase]: For 268579/268655 co-relation queries the response was YES. [2024-06-27 17:57:02,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38147 conditions, 6540 events. 3805/6540 cut-off events. For 268579/268655 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47194 event pairs, 1137 based on Foata normal form. 77/6559 useless extension candidates. Maximal degree in co-relation 38007. Up to 5526 conditions per place. [2024-06-27 17:57:02,928 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 364 selfloop transitions, 67 changer transitions 0/446 dead transitions. [2024-06-27 17:57:02,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 446 transitions, 6431 flow [2024-06-27 17:57:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:57:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:57:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 17:57:02,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990338164251208 [2024-06-27 17:57:02,930 INFO L175 Difference]: Start difference. First operand has 343 places, 404 transitions, 5325 flow. Second operand 9 states and 248 transitions. [2024-06-27 17:57:02,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 446 transitions, 6431 flow [2024-06-27 17:57:04,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 446 transitions, 5979 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 17:57:04,352 INFO L231 Difference]: Finished difference. Result has 341 places, 413 transitions, 5205 flow [2024-06-27 17:57:04,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5205, PETRI_PLACES=341, PETRI_TRANSITIONS=413} [2024-06-27 17:57:04,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 291 predicate places. [2024-06-27 17:57:04,352 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 413 transitions, 5205 flow [2024-06-27 17:57:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:04,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:04,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 17:57:04,353 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:04,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -372655574, now seen corresponding path program 25 times [2024-06-27 17:57:04,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:04,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234139136] [2024-06-27 17:57:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:04,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:04,458 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 17:57:04,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234139136] [2024-06-27 17:57:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234139136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:04,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:04,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:04,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663300441] [2024-06-27 17:57:04,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:04,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:04,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:04,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:04,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:04,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 413 transitions, 5205 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:04,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:04,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:05,479 INFO L124 PetriNetUnfolderBase]: 3802/6395 cut-off events. [2024-06-27 17:57:05,479 INFO L125 PetriNetUnfolderBase]: For 255631/255761 co-relation queries the response was YES. [2024-06-27 17:57:05,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37190 conditions, 6395 events. 3802/6395 cut-off events. For 255631/255761 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 45159 event pairs, 745 based on Foata normal form. 131/6486 useless extension candidates. Maximal degree in co-relation 37050. Up to 5345 conditions per place. [2024-06-27 17:57:05,554 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 323 selfloop transitions, 123 changer transitions 0/461 dead transitions. [2024-06-27 17:57:05,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 461 transitions, 6225 flow [2024-06-27 17:57:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:57:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:57:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-27 17:57:05,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6570048309178744 [2024-06-27 17:57:05,555 INFO L175 Difference]: Start difference. First operand has 341 places, 413 transitions, 5205 flow. Second operand 9 states and 272 transitions. [2024-06-27 17:57:05,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 461 transitions, 6225 flow [2024-06-27 17:57:06,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 461 transitions, 6053 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:06,757 INFO L231 Difference]: Finished difference. Result has 344 places, 413 transitions, 5305 flow [2024-06-27 17:57:06,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5305, PETRI_PLACES=344, PETRI_TRANSITIONS=413} [2024-06-27 17:57:06,758 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-27 17:57:06,758 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 413 transitions, 5305 flow [2024-06-27 17:57:06,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:06,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:06,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 17:57:06,759 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:06,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:06,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1947528750, now seen corresponding path program 26 times [2024-06-27 17:57:06,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:06,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048504640] [2024-06-27 17:57:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:06,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:06,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:06,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048504640] [2024-06-27 17:57:06,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048504640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:06,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:06,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:06,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225809756] [2024-06-27 17:57:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:06,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:06,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 413 transitions, 5305 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:06,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:06,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,894 INFO L124 PetriNetUnfolderBase]: 3813/6491 cut-off events. [2024-06-27 17:57:07,895 INFO L125 PetriNetUnfolderBase]: For 258768/258894 co-relation queries the response was YES. [2024-06-27 17:57:07,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37581 conditions, 6491 events. 3813/6491 cut-off events. For 258768/258894 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46393 event pairs, 758 based on Foata normal form. 127/6574 useless extension candidates. Maximal degree in co-relation 37441. Up to 5130 conditions per place. [2024-06-27 17:57:07,966 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 233 selfloop transitions, 211 changer transitions 0/459 dead transitions. [2024-06-27 17:57:07,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 459 transitions, 6503 flow [2024-06-27 17:57:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-27 17:57:07,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:57:07,968 INFO L175 Difference]: Start difference. First operand has 344 places, 413 transitions, 5305 flow. Second operand 10 states and 285 transitions. [2024-06-27 17:57:07,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 459 transitions, 6503 flow [2024-06-27 17:57:09,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 459 transitions, 6217 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:09,223 INFO L231 Difference]: Finished difference. Result has 346 places, 416 transitions, 5497 flow [2024-06-27 17:57:09,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5497, PETRI_PLACES=346, PETRI_TRANSITIONS=416} [2024-06-27 17:57:09,224 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 296 predicate places. [2024-06-27 17:57:09,224 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 416 transitions, 5497 flow [2024-06-27 17:57:09,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:09,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:09,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:09,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 17:57:09,224 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:09,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash 374222254, now seen corresponding path program 27 times [2024-06-27 17:57:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:09,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760388577] [2024-06-27 17:57:09,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:09,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:09,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:09,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760388577] [2024-06-27 17:57:09,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760388577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:09,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:09,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:09,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554967162] [2024-06-27 17:57:09,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:09,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:09,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:09,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:09,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 416 transitions, 5497 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:09,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:09,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:09,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:10,306 INFO L124 PetriNetUnfolderBase]: 3810/6390 cut-off events. [2024-06-27 17:57:10,306 INFO L125 PetriNetUnfolderBase]: For 253554/253684 co-relation queries the response was YES. [2024-06-27 17:57:10,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37734 conditions, 6390 events. 3810/6390 cut-off events. For 253554/253684 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 45030 event pairs, 729 based on Foata normal form. 131/6479 useless extension candidates. Maximal degree in co-relation 37593. Up to 5127 conditions per place. [2024-06-27 17:57:10,377 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 233 selfloop transitions, 199 changer transitions 0/447 dead transitions. [2024-06-27 17:57:10,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 447 transitions, 6599 flow [2024-06-27 17:57:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:57:10,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:57:10,378 INFO L175 Difference]: Start difference. First operand has 346 places, 416 transitions, 5497 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:57:10,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 447 transitions, 6599 flow [2024-06-27 17:57:11,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 6027 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-27 17:57:11,638 INFO L231 Difference]: Finished difference. Result has 342 places, 416 transitions, 5337 flow [2024-06-27 17:57:11,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5337, PETRI_PLACES=342, PETRI_TRANSITIONS=416} [2024-06-27 17:57:11,638 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 292 predicate places. [2024-06-27 17:57:11,638 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 416 transitions, 5337 flow [2024-06-27 17:57:11,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:11,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:11,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:11,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 17:57:11,639 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:11,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash 365948044, now seen corresponding path program 28 times [2024-06-27 17:57:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:11,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566699367] [2024-06-27 17:57:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566699367] [2024-06-27 17:57:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566699367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:11,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:11,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033280143] [2024-06-27 17:57:11,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:11,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:11,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:11,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:11,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 416 transitions, 5337 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:11,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:11,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:11,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:12,833 INFO L124 PetriNetUnfolderBase]: 3807/6478 cut-off events. [2024-06-27 17:57:12,833 INFO L125 PetriNetUnfolderBase]: For 246147/246273 co-relation queries the response was YES. [2024-06-27 17:57:12,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37454 conditions, 6478 events. 3807/6478 cut-off events. For 246147/246273 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46306 event pairs, 759 based on Foata normal form. 127/6560 useless extension candidates. Maximal degree in co-relation 37314. Up to 5124 conditions per place. [2024-06-27 17:57:12,894 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 237 selfloop transitions, 206 changer transitions 0/458 dead transitions. [2024-06-27 17:57:12,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 458 transitions, 6335 flow [2024-06-27 17:57:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:57:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:57:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-06-27 17:57:12,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6400966183574879 [2024-06-27 17:57:12,896 INFO L175 Difference]: Start difference. First operand has 342 places, 416 transitions, 5337 flow. Second operand 9 states and 265 transitions. [2024-06-27 17:57:12,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 458 transitions, 6335 flow [2024-06-27 17:57:13,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 458 transitions, 5881 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:13,930 INFO L231 Difference]: Finished difference. Result has 344 places, 416 transitions, 5309 flow [2024-06-27 17:57:13,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5309, PETRI_PLACES=344, PETRI_TRANSITIONS=416} [2024-06-27 17:57:13,931 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-27 17:57:13,931 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 416 transitions, 5309 flow [2024-06-27 17:57:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:13,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:13,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:13,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 17:57:13,932 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:13,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1283173608, now seen corresponding path program 1 times [2024-06-27 17:57:13,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:13,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276802882] [2024-06-27 17:57:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:13,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:14,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:14,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276802882] [2024-06-27 17:57:14,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276802882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:14,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:14,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:14,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037933513] [2024-06-27 17:57:14,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:14,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:14,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:14,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:14,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 416 transitions, 5309 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:14,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:14,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:14,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:15,097 INFO L124 PetriNetUnfolderBase]: 3899/6683 cut-off events. [2024-06-27 17:57:15,097 INFO L125 PetriNetUnfolderBase]: For 262409/262485 co-relation queries the response was YES. [2024-06-27 17:57:15,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38386 conditions, 6683 events. 3899/6683 cut-off events. For 262409/262485 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48282 event pairs, 1167 based on Foata normal form. 82/6705 useless extension candidates. Maximal degree in co-relation 38246. Up to 5606 conditions per place. [2024-06-27 17:57:15,175 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 405 selfloop transitions, 38 changer transitions 0/458 dead transitions. [2024-06-27 17:57:15,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 458 transitions, 6372 flow [2024-06-27 17:57:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-27 17:57:15,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-06-27 17:57:15,176 INFO L175 Difference]: Start difference. First operand has 344 places, 416 transitions, 5309 flow. Second operand 10 states and 270 transitions. [2024-06-27 17:57:15,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 458 transitions, 6372 flow [2024-06-27 17:57:16,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 458 transitions, 5894 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 17:57:16,278 INFO L231 Difference]: Finished difference. Result has 344 places, 418 transitions, 4958 flow [2024-06-27 17:57:16,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4958, PETRI_PLACES=344, PETRI_TRANSITIONS=418} [2024-06-27 17:57:16,278 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-27 17:57:16,279 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 418 transitions, 4958 flow [2024-06-27 17:57:16,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:16,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:16,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 17:57:16,279 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:16,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1144743716, now seen corresponding path program 2 times [2024-06-27 17:57:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:16,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828720248] [2024-06-27 17:57:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:16,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:16,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:16,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828720248] [2024-06-27 17:57:16,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828720248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:16,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:16,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:16,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520734755] [2024-06-27 17:57:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:16,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:16,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:16,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:16,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 418 transitions, 4958 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:16,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:16,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:17,414 INFO L124 PetriNetUnfolderBase]: 3945/6654 cut-off events. [2024-06-27 17:57:17,414 INFO L125 PetriNetUnfolderBase]: For 254969/255099 co-relation queries the response was YES. [2024-06-27 17:57:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37977 conditions, 6654 events. 3945/6654 cut-off events. For 254969/255099 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47426 event pairs, 711 based on Foata normal form. 136/6750 useless extension candidates. Maximal degree in co-relation 37837. Up to 5376 conditions per place. [2024-06-27 17:57:17,487 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 389 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-27 17:57:17,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 457 transitions, 6016 flow [2024-06-27 17:57:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:57:17,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:57:17,488 INFO L175 Difference]: Start difference. First operand has 344 places, 418 transitions, 4958 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:57:17,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 457 transitions, 6016 flow [2024-06-27 17:57:18,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 457 transitions, 5936 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:18,699 INFO L231 Difference]: Finished difference. Result has 344 places, 419 transitions, 5014 flow [2024-06-27 17:57:18,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5014, PETRI_PLACES=344, PETRI_TRANSITIONS=419} [2024-06-27 17:57:18,699 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-27 17:57:18,699 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 419 transitions, 5014 flow [2024-06-27 17:57:18,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:18,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:18,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:18,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 17:57:18,700 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:18,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -364754232, now seen corresponding path program 3 times [2024-06-27 17:57:18,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:18,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017025512] [2024-06-27 17:57:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:18,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:18,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:18,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017025512] [2024-06-27 17:57:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017025512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:18,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:18,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:18,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274038395] [2024-06-27 17:57:18,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:18,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:18,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 419 transitions, 5014 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:18,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:18,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:19,869 INFO L124 PetriNetUnfolderBase]: 3932/6622 cut-off events. [2024-06-27 17:57:19,869 INFO L125 PetriNetUnfolderBase]: For 243118/243251 co-relation queries the response was YES. [2024-06-27 17:57:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37556 conditions, 6622 events. 3932/6622 cut-off events. For 243118/243251 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47212 event pairs, 697 based on Foata normal form. 138/6718 useless extension candidates. Maximal degree in co-relation 37415. Up to 5271 conditions per place. [2024-06-27 17:57:19,945 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 387 selfloop transitions, 53 changer transitions 0/455 dead transitions. [2024-06-27 17:57:19,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 455 transitions, 6040 flow [2024-06-27 17:57:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:57:19,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:57:19,946 INFO L175 Difference]: Start difference. First operand has 344 places, 419 transitions, 5014 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:57:19,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 455 transitions, 6040 flow [2024-06-27 17:57:21,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 455 transitions, 5920 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:21,168 INFO L231 Difference]: Finished difference. Result has 346 places, 419 transitions, 5004 flow [2024-06-27 17:57:21,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5004, PETRI_PLACES=346, PETRI_TRANSITIONS=419} [2024-06-27 17:57:21,169 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 296 predicate places. [2024-06-27 17:57:21,169 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 419 transitions, 5004 flow [2024-06-27 17:57:21,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:21,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:21,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:21,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 17:57:21,169 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:21,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash 913859492, now seen corresponding path program 1 times [2024-06-27 17:57:21,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:21,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449074288] [2024-06-27 17:57:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:21,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:21,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:21,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449074288] [2024-06-27 17:57:21,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449074288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:21,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:21,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:21,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496548144] [2024-06-27 17:57:21,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:21,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:21,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:21,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:21,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 419 transitions, 5004 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:21,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:21,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:21,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:22,367 INFO L124 PetriNetUnfolderBase]: 3957/6713 cut-off events. [2024-06-27 17:57:22,368 INFO L125 PetriNetUnfolderBase]: For 230991/231121 co-relation queries the response was YES. [2024-06-27 17:57:22,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37826 conditions, 6713 events. 3957/6713 cut-off events. For 230991/231121 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48072 event pairs, 798 based on Foata normal form. 131/6807 useless extension candidates. Maximal degree in co-relation 37684. Up to 5798 conditions per place. [2024-06-27 17:57:22,447 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 417 selfloop transitions, 36 changer transitions 0/468 dead transitions. [2024-06-27 17:57:22,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 468 transitions, 6274 flow [2024-06-27 17:57:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:57:22,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-27 17:57:22,448 INFO L175 Difference]: Start difference. First operand has 346 places, 419 transitions, 5004 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:57:22,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 468 transitions, 6274 flow [2024-06-27 17:57:23,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 468 transitions, 6125 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:23,569 INFO L231 Difference]: Finished difference. Result has 348 places, 425 transitions, 5035 flow [2024-06-27 17:57:23,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4855, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5035, PETRI_PLACES=348, PETRI_TRANSITIONS=425} [2024-06-27 17:57:23,570 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 298 predicate places. [2024-06-27 17:57:23,570 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 425 transitions, 5035 flow [2024-06-27 17:57:23,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:23,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:23,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:23,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 17:57:23,570 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:23,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash -949634128, now seen corresponding path program 1 times [2024-06-27 17:57:23,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:23,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883267592] [2024-06-27 17:57:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:23,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:23,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:23,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883267592] [2024-06-27 17:57:23,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883267592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:23,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:23,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257395865] [2024-06-27 17:57:23,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:23,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:23,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:23,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 425 transitions, 5035 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:23,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:23,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:24,702 INFO L124 PetriNetUnfolderBase]: 3993/6766 cut-off events. [2024-06-27 17:57:24,702 INFO L125 PetriNetUnfolderBase]: For 241445/241575 co-relation queries the response was YES. [2024-06-27 17:57:24,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38197 conditions, 6766 events. 3993/6766 cut-off events. For 241445/241575 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 48457 event pairs, 806 based on Foata normal form. 131/6856 useless extension candidates. Maximal degree in co-relation 38055. Up to 5785 conditions per place. [2024-06-27 17:57:24,776 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 407 selfloop transitions, 52 changer transitions 0/474 dead transitions. [2024-06-27 17:57:24,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 474 transitions, 6348 flow [2024-06-27 17:57:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:57:24,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-27 17:57:24,777 INFO L175 Difference]: Start difference. First operand has 348 places, 425 transitions, 5035 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:57:24,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 474 transitions, 6348 flow [2024-06-27 17:57:26,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 474 transitions, 6244 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:26,038 INFO L231 Difference]: Finished difference. Result has 353 places, 434 transitions, 5188 flow [2024-06-27 17:57:26,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5188, PETRI_PLACES=353, PETRI_TRANSITIONS=434} [2024-06-27 17:57:26,039 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-06-27 17:57:26,039 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 434 transitions, 5188 flow [2024-06-27 17:57:26,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:26,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:26,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:26,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 17:57:26,040 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:26,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -949634314, now seen corresponding path program 2 times [2024-06-27 17:57:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330763455] [2024-06-27 17:57:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:26,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:26,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330763455] [2024-06-27 17:57:26,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330763455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:26,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:26,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:26,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185032558] [2024-06-27 17:57:26,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:26,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:26,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 434 transitions, 5188 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:26,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:26,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:26,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:27,255 INFO L124 PetriNetUnfolderBase]: 4004/6762 cut-off events. [2024-06-27 17:57:27,256 INFO L125 PetriNetUnfolderBase]: For 244327/244457 co-relation queries the response was YES. [2024-06-27 17:57:27,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38774 conditions, 6762 events. 4004/6762 cut-off events. For 244327/244457 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48312 event pairs, 800 based on Foata normal form. 131/6854 useless extension candidates. Maximal degree in co-relation 38629. Up to 5877 conditions per place. [2024-06-27 17:57:27,337 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 427 selfloop transitions, 34 changer transitions 0/476 dead transitions. [2024-06-27 17:57:27,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 476 transitions, 6248 flow [2024-06-27 17:57:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 17:57:27,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 17:57:27,338 INFO L175 Difference]: Start difference. First operand has 353 places, 434 transitions, 5188 flow. Second operand 8 states and 230 transitions. [2024-06-27 17:57:27,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 476 transitions, 6248 flow [2024-06-27 17:57:28,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 476 transitions, 6044 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:28,809 INFO L231 Difference]: Finished difference. Result has 357 places, 437 transitions, 5098 flow [2024-06-27 17:57:28,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5098, PETRI_PLACES=357, PETRI_TRANSITIONS=437} [2024-06-27 17:57:28,810 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 307 predicate places. [2024-06-27 17:57:28,810 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 437 transitions, 5098 flow [2024-06-27 17:57:28,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:28,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:28,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 17:57:28,811 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:28,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -67082786, now seen corresponding path program 2 times [2024-06-27 17:57:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:28,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970666633] [2024-06-27 17:57:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:28,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:28,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970666633] [2024-06-27 17:57:28,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970666633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:28,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:28,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436510250] [2024-06-27 17:57:28,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:28,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:28,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:28,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:28,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 437 transitions, 5098 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:28,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:28,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:28,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:30,062 INFO L124 PetriNetUnfolderBase]: 4062/6846 cut-off events. [2024-06-27 17:57:30,062 INFO L125 PetriNetUnfolderBase]: For 251698/251826 co-relation queries the response was YES. [2024-06-27 17:57:30,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39305 conditions, 6846 events. 4062/6846 cut-off events. For 251698/251826 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 48915 event pairs, 1023 based on Foata normal form. 129/6926 useless extension candidates. Maximal degree in co-relation 39160. Up to 5847 conditions per place. [2024-06-27 17:57:30,136 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 419 selfloop transitions, 68 changer transitions 0/502 dead transitions. [2024-06-27 17:57:30,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 502 transitions, 6728 flow [2024-06-27 17:57:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-06-27 17:57:30,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:57:30,138 INFO L175 Difference]: Start difference. First operand has 357 places, 437 transitions, 5098 flow. Second operand 11 states and 308 transitions. [2024-06-27 17:57:30,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 502 transitions, 6728 flow [2024-06-27 17:57:31,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 502 transitions, 6620 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:31,484 INFO L231 Difference]: Finished difference. Result has 363 places, 452 transitions, 5356 flow [2024-06-27 17:57:31,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5004, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5356, PETRI_PLACES=363, PETRI_TRANSITIONS=452} [2024-06-27 17:57:31,485 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 313 predicate places. [2024-06-27 17:57:31,485 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 452 transitions, 5356 flow [2024-06-27 17:57:31,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:31,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:31,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:31,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 17:57:31,486 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:31,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1588478148, now seen corresponding path program 3 times [2024-06-27 17:57:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605872614] [2024-06-27 17:57:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:31,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:31,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:31,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605872614] [2024-06-27 17:57:31,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605872614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:31,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:31,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:31,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438195996] [2024-06-27 17:57:31,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:31,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:31,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:31,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:31,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:31,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 452 transitions, 5356 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:31,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:32,678 INFO L124 PetriNetUnfolderBase]: 4073/6878 cut-off events. [2024-06-27 17:57:32,678 INFO L125 PetriNetUnfolderBase]: For 257547/257677 co-relation queries the response was YES. [2024-06-27 17:57:32,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39596 conditions, 6878 events. 4073/6878 cut-off events. For 257547/257677 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49181 event pairs, 802 based on Foata normal form. 131/6970 useless extension candidates. Maximal degree in co-relation 39449. Up to 5954 conditions per place. [2024-06-27 17:57:32,761 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 444 selfloop transitions, 44 changer transitions 0/503 dead transitions. [2024-06-27 17:57:32,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 503 transitions, 6500 flow [2024-06-27 17:57:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-27 17:57:32,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968379446640316 [2024-06-27 17:57:32,763 INFO L175 Difference]: Start difference. First operand has 363 places, 452 transitions, 5356 flow. Second operand 11 states and 302 transitions. [2024-06-27 17:57:32,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 503 transitions, 6500 flow [2024-06-27 17:57:34,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 503 transitions, 6356 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:34,221 INFO L231 Difference]: Finished difference. Result has 370 places, 455 transitions, 5352 flow [2024-06-27 17:57:34,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5352, PETRI_PLACES=370, PETRI_TRANSITIONS=455} [2024-06-27 17:57:34,222 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-06-27 17:57:34,222 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 455 transitions, 5352 flow [2024-06-27 17:57:34,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:34,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:34,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 17:57:34,223 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:34,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash 105400594, now seen corresponding path program 3 times [2024-06-27 17:57:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:34,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197353375] [2024-06-27 17:57:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:34,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:34,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197353375] [2024-06-27 17:57:34,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197353375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:34,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:34,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:34,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887112229] [2024-06-27 17:57:34,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:34,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:34,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:34,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:34,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:34,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 455 transitions, 5352 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:34,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:34,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:34,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:35,613 INFO L124 PetriNetUnfolderBase]: 4070/6906 cut-off events. [2024-06-27 17:57:35,614 INFO L125 PetriNetUnfolderBase]: For 259353/259483 co-relation queries the response was YES. [2024-06-27 17:57:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39473 conditions, 6906 events. 4070/6906 cut-off events. For 259353/259483 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49644 event pairs, 808 based on Foata normal form. 131/6995 useless extension candidates. Maximal degree in co-relation 39325. Up to 5859 conditions per place. [2024-06-27 17:57:35,685 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 420 selfloop transitions, 66 changer transitions 0/501 dead transitions. [2024-06-27 17:57:35,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 501 transitions, 6608 flow [2024-06-27 17:57:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-27 17:57:35,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-06-27 17:57:35,686 INFO L175 Difference]: Start difference. First operand has 370 places, 455 transitions, 5352 flow. Second operand 10 states and 286 transitions. [2024-06-27 17:57:35,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 501 transitions, 6608 flow [2024-06-27 17:57:37,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 501 transitions, 6448 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-06-27 17:57:37,220 INFO L231 Difference]: Finished difference. Result has 369 places, 455 transitions, 5330 flow [2024-06-27 17:57:37,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5192, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5330, PETRI_PLACES=369, PETRI_TRANSITIONS=455} [2024-06-27 17:57:37,221 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 319 predicate places. [2024-06-27 17:57:37,221 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 455 transitions, 5330 flow [2024-06-27 17:57:37,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:37,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:37,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:37,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 17:57:37,221 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:37,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1597766988, now seen corresponding path program 1 times [2024-06-27 17:57:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:37,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311358924] [2024-06-27 17:57:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:37,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311358924] [2024-06-27 17:57:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311358924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:37,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804154708] [2024-06-27 17:57:37,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:37,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:37,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:37,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:37,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 455 transitions, 5330 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:37,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:37,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:37,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:38,474 INFO L124 PetriNetUnfolderBase]: 4272/7155 cut-off events. [2024-06-27 17:57:38,474 INFO L125 PetriNetUnfolderBase]: For 282618/282750 co-relation queries the response was YES. [2024-06-27 17:57:38,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40926 conditions, 7155 events. 4272/7155 cut-off events. For 282618/282750 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51298 event pairs, 693 based on Foata normal form. 138/7254 useless extension candidates. Maximal degree in co-relation 40779. Up to 5824 conditions per place. [2024-06-27 17:57:38,561 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 441 selfloop transitions, 53 changer transitions 0/509 dead transitions. [2024-06-27 17:57:38,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 509 transitions, 6719 flow [2024-06-27 17:57:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:57:38,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 17:57:38,562 INFO L175 Difference]: Start difference. First operand has 369 places, 455 transitions, 5330 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:57:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 509 transitions, 6719 flow [2024-06-27 17:57:40,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 509 transitions, 6559 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 17:57:40,388 INFO L231 Difference]: Finished difference. Result has 369 places, 461 transitions, 5381 flow [2024-06-27 17:57:40,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5381, PETRI_PLACES=369, PETRI_TRANSITIONS=461} [2024-06-27 17:57:40,389 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 319 predicate places. [2024-06-27 17:57:40,389 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 461 transitions, 5381 flow [2024-06-27 17:57:40,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:40,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:40,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:40,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 17:57:40,390 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:40,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash -152979632, now seen corresponding path program 2 times [2024-06-27 17:57:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525722501] [2024-06-27 17:57:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:40,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:40,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525722501] [2024-06-27 17:57:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525722501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:40,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:40,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:40,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291181155] [2024-06-27 17:57:40,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:40,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:40,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:40,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:40,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 461 transitions, 5381 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:40,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:40,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:40,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:41,838 INFO L124 PetriNetUnfolderBase]: 4400/7375 cut-off events. [2024-06-27 17:57:41,839 INFO L125 PetriNetUnfolderBase]: For 292059/292191 co-relation queries the response was YES. [2024-06-27 17:57:41,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42495 conditions, 7375 events. 4400/7375 cut-off events. For 292059/292191 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 53153 event pairs, 833 based on Foata normal form. 138/7472 useless extension candidates. Maximal degree in co-relation 42345. Up to 6293 conditions per place. [2024-06-27 17:57:41,911 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 445 selfloop transitions, 48 changer transitions 0/508 dead transitions. [2024-06-27 17:57:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 508 transitions, 6579 flow [2024-06-27 17:57:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:57:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-27 17:57:41,912 INFO L175 Difference]: Start difference. First operand has 369 places, 461 transitions, 5381 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:57:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 508 transitions, 6579 flow [2024-06-27 17:57:43,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 508 transitions, 6464 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:43,811 INFO L231 Difference]: Finished difference. Result has 373 places, 465 transitions, 5438 flow [2024-06-27 17:57:43,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5438, PETRI_PLACES=373, PETRI_TRANSITIONS=465} [2024-06-27 17:57:43,812 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-06-27 17:57:43,812 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 465 transitions, 5438 flow [2024-06-27 17:57:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:43,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:43,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 17:57:43,812 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:43,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1897397228, now seen corresponding path program 4 times [2024-06-27 17:57:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:43,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128139254] [2024-06-27 17:57:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:43,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:43,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128139254] [2024-06-27 17:57:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128139254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:43,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:43,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620082275] [2024-06-27 17:57:43,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:43,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:43,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:43,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:43,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 465 transitions, 5438 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:43,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:43,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:43,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:45,094 INFO L124 PetriNetUnfolderBase]: 4439/7539 cut-off events. [2024-06-27 17:57:45,094 INFO L125 PetriNetUnfolderBase]: For 290490/290621 co-relation queries the response was YES. [2024-06-27 17:57:45,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43093 conditions, 7539 events. 4439/7539 cut-off events. For 290490/290621 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55037 event pairs, 835 based on Foata normal form. 129/7635 useless extension candidates. Maximal degree in co-relation 42942. Up to 6046 conditions per place. [2024-06-27 17:57:45,191 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 375 selfloop transitions, 130 changer transitions 0/520 dead transitions. [2024-06-27 17:57:45,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 520 transitions, 7456 flow [2024-06-27 17:57:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 17:57:45,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603260869565217 [2024-06-27 17:57:45,193 INFO L175 Difference]: Start difference. First operand has 373 places, 465 transitions, 5438 flow. Second operand 8 states and 243 transitions. [2024-06-27 17:57:45,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 520 transitions, 7456 flow [2024-06-27 17:57:47,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 520 transitions, 7352 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:47,044 INFO L231 Difference]: Finished difference. Result has 376 places, 477 transitions, 5830 flow [2024-06-27 17:57:47,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5830, PETRI_PLACES=376, PETRI_TRANSITIONS=477} [2024-06-27 17:57:47,045 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-06-27 17:57:47,045 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 477 transitions, 5830 flow [2024-06-27 17:57:47,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:47,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:47,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 17:57:47,046 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:47,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash 47173906, now seen corresponding path program 4 times [2024-06-27 17:57:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:47,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780585219] [2024-06-27 17:57:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:47,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:47,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:47,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780585219] [2024-06-27 17:57:47,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780585219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:47,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:47,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369030512] [2024-06-27 17:57:47,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:47,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:47,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:47,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 477 transitions, 5830 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:47,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:47,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:48,423 INFO L124 PetriNetUnfolderBase]: 4475/7494 cut-off events. [2024-06-27 17:57:48,423 INFO L125 PetriNetUnfolderBase]: For 304058/304191 co-relation queries the response was YES. [2024-06-27 17:57:48,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44308 conditions, 7494 events. 4475/7494 cut-off events. For 304058/304191 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 54182 event pairs, 810 based on Foata normal form. 133/7586 useless extension candidates. Maximal degree in co-relation 44156. Up to 6136 conditions per place. [2024-06-27 17:57:48,505 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 381 selfloop transitions, 132 changer transitions 0/528 dead transitions. [2024-06-27 17:57:48,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 528 transitions, 7675 flow [2024-06-27 17:57:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:57:48,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 17:57:48,506 INFO L175 Difference]: Start difference. First operand has 376 places, 477 transitions, 5830 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:57:48,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 528 transitions, 7675 flow [2024-06-27 17:57:50,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 528 transitions, 7502 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:50,424 INFO L231 Difference]: Finished difference. Result has 383 places, 489 transitions, 6146 flow [2024-06-27 17:57:50,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6146, PETRI_PLACES=383, PETRI_TRANSITIONS=489} [2024-06-27 17:57:50,425 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 333 predicate places. [2024-06-27 17:57:50,425 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 489 transitions, 6146 flow [2024-06-27 17:57:50,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:50,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:50,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 17:57:50,425 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:50,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash 246355540, now seen corresponding path program 5 times [2024-06-27 17:57:50,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:50,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325615076] [2024-06-27 17:57:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:50,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325615076] [2024-06-27 17:57:50,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325615076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:50,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:50,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192708435] [2024-06-27 17:57:50,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:50,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:50,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:50,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 489 transitions, 6146 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:50,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:50,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:50,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:51,756 INFO L124 PetriNetUnfolderBase]: 4486/7664 cut-off events. [2024-06-27 17:57:51,756 INFO L125 PetriNetUnfolderBase]: For 315928/316045 co-relation queries the response was YES. [2024-06-27 17:57:51,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45442 conditions, 7664 events. 4486/7664 cut-off events. For 315928/316045 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 56170 event pairs, 878 based on Foata normal form. 115/7744 useless extension candidates. Maximal degree in co-relation 45287. Up to 6100 conditions per place. [2024-06-27 17:57:51,853 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 379 selfloop transitions, 140 changer transitions 0/534 dead transitions. [2024-06-27 17:57:51,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 534 transitions, 7848 flow [2024-06-27 17:57:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 17:57:51,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-06-27 17:57:51,854 INFO L175 Difference]: Start difference. First operand has 383 places, 489 transitions, 6146 flow. Second operand 8 states and 241 transitions. [2024-06-27 17:57:51,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 534 transitions, 7848 flow [2024-06-27 17:57:54,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 534 transitions, 7684 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:54,288 INFO L231 Difference]: Finished difference. Result has 389 places, 492 transitions, 6306 flow [2024-06-27 17:57:54,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5982, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6306, PETRI_PLACES=389, PETRI_TRANSITIONS=492} [2024-06-27 17:57:54,288 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 339 predicate places. [2024-06-27 17:57:54,288 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 492 transitions, 6306 flow [2024-06-27 17:57:54,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:54,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 17:57:54,289 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:54,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1242541634, now seen corresponding path program 6 times [2024-06-27 17:57:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:54,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358705460] [2024-06-27 17:57:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:54,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:54,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358705460] [2024-06-27 17:57:54,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358705460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:54,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:54,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:54,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495330746] [2024-06-27 17:57:54,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:54,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:54,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:54,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:54,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 492 transitions, 6306 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:54,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:54,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:55,718 INFO L124 PetriNetUnfolderBase]: 4497/7778 cut-off events. [2024-06-27 17:57:55,719 INFO L125 PetriNetUnfolderBase]: For 323182/323299 co-relation queries the response was YES. [2024-06-27 17:57:55,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46120 conditions, 7778 events. 4497/7778 cut-off events. For 323182/323299 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57596 event pairs, 975 based on Foata normal form. 115/7858 useless extension candidates. Maximal degree in co-relation 45963. Up to 6112 conditions per place. [2024-06-27 17:57:55,852 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 376 selfloop transitions, 142 changer transitions 0/533 dead transitions. [2024-06-27 17:57:55,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 533 transitions, 7834 flow [2024-06-27 17:57:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:57:55,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:57:55,856 INFO L175 Difference]: Start difference. First operand has 389 places, 492 transitions, 6306 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:57:55,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 533 transitions, 7834 flow [2024-06-27 17:57:58,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 533 transitions, 7504 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:58,353 INFO L231 Difference]: Finished difference. Result has 391 places, 495 transitions, 6310 flow [2024-06-27 17:57:58,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5986, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6310, PETRI_PLACES=391, PETRI_TRANSITIONS=495} [2024-06-27 17:57:58,354 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 341 predicate places. [2024-06-27 17:57:58,354 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 495 transitions, 6310 flow [2024-06-27 17:57:58,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:58,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:58,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:58,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 17:57:58,354 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:58,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:58,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1032884294, now seen corresponding path program 7 times [2024-06-27 17:57:58,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:58,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74744075] [2024-06-27 17:57:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:58,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:58,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:58,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74744075] [2024-06-27 17:57:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74744075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:58,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:58,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:58,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582594230] [2024-06-27 17:57:58,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:58,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:58,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:58,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:58,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 495 transitions, 6310 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:58,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:58,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:58,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:59,706 INFO L124 PetriNetUnfolderBase]: 4508/7656 cut-off events. [2024-06-27 17:57:59,707 INFO L125 PetriNetUnfolderBase]: For 326647/326780 co-relation queries the response was YES. [2024-06-27 17:57:59,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46047 conditions, 7656 events. 4508/7656 cut-off events. For 326647/326780 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55892 event pairs, 841 based on Foata normal form. 133/7751 useless extension candidates. Maximal degree in co-relation 45889. Up to 6455 conditions per place. [2024-06-27 17:57:59,808 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 445 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-27 17:57:59,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 534 transitions, 7484 flow [2024-06-27 17:57:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:57:59,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 17:57:59,810 INFO L175 Difference]: Start difference. First operand has 391 places, 495 transitions, 6310 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:57:59,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 534 transitions, 7484 flow [2024-06-27 17:58:02,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 534 transitions, 7222 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:02,557 INFO L231 Difference]: Finished difference. Result has 394 places, 498 transitions, 6248 flow [2024-06-27 17:58:02,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6248, PETRI_PLACES=394, PETRI_TRANSITIONS=498} [2024-06-27 17:58:02,557 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 344 predicate places. [2024-06-27 17:58:02,557 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 498 transitions, 6248 flow [2024-06-27 17:58:02,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:02,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:02,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:02,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 17:58:02,558 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:02,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash 202293052, now seen corresponding path program 5 times [2024-06-27 17:58:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136794320] [2024-06-27 17:58:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:02,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:02,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:02,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136794320] [2024-06-27 17:58:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136794320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:02,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222658254] [2024-06-27 17:58:02,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:02,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:02,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:02,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:02,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 498 transitions, 6248 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:02,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:02,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:03,893 INFO L124 PetriNetUnfolderBase]: 4544/7616 cut-off events. [2024-06-27 17:58:03,893 INFO L125 PetriNetUnfolderBase]: For 335793/335926 co-relation queries the response was YES. [2024-06-27 17:58:03,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46173 conditions, 7616 events. 4544/7616 cut-off events. For 335793/335926 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 55188 event pairs, 813 based on Foata normal form. 133/7706 useless extension candidates. Maximal degree in co-relation 46014. Up to 6216 conditions per place. [2024-06-27 17:58:03,989 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 394 selfloop transitions, 134 changer transitions 0/543 dead transitions. [2024-06-27 17:58:03,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 543 transitions, 8053 flow [2024-06-27 17:58:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:58:03,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:58:03,990 INFO L175 Difference]: Start difference. First operand has 394 places, 498 transitions, 6248 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:58:03,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 543 transitions, 8053 flow [2024-06-27 17:58:06,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 543 transitions, 7871 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:06,896 INFO L231 Difference]: Finished difference. Result has 396 places, 507 transitions, 6471 flow [2024-06-27 17:58:06,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6471, PETRI_PLACES=396, PETRI_TRANSITIONS=507} [2024-06-27 17:58:06,897 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 346 predicate places. [2024-06-27 17:58:06,897 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 507 transitions, 6471 flow [2024-06-27 17:58:06,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:06,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:06,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 17:58:06,897 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:06,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1357832804, now seen corresponding path program 8 times [2024-06-27 17:58:06,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:06,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857687494] [2024-06-27 17:58:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:06,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:06,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857687494] [2024-06-27 17:58:06,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857687494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:06,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:06,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:06,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080945969] [2024-06-27 17:58:06,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:06,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:06,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:06,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:06,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:07,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:07,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 507 transitions, 6471 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:07,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:07,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:07,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:08,269 INFO L124 PetriNetUnfolderBase]: 4569/7656 cut-off events. [2024-06-27 17:58:08,269 INFO L125 PetriNetUnfolderBase]: For 347306/347439 co-relation queries the response was YES. [2024-06-27 17:58:08,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46769 conditions, 7656 events. 4569/7656 cut-off events. For 347306/347439 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 55598 event pairs, 796 based on Foata normal form. 133/7752 useless extension candidates. Maximal degree in co-relation 46609. Up to 6506 conditions per place. [2024-06-27 17:58:08,365 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 445 selfloop transitions, 87 changer transitions 0/547 dead transitions. [2024-06-27 17:58:08,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 547 transitions, 7885 flow [2024-06-27 17:58:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 17:58:08,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 17:58:08,366 INFO L175 Difference]: Start difference. First operand has 396 places, 507 transitions, 6471 flow. Second operand 8 states and 230 transitions. [2024-06-27 17:58:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 547 transitions, 7885 flow [2024-06-27 17:58:11,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 547 transitions, 7645 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:11,157 INFO L231 Difference]: Finished difference. Result has 401 places, 513 transitions, 6519 flow [2024-06-27 17:58:11,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6519, PETRI_PLACES=401, PETRI_TRANSITIONS=513} [2024-06-27 17:58:11,158 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 351 predicate places. [2024-06-27 17:58:11,158 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 513 transitions, 6519 flow [2024-06-27 17:58:11,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:11,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:11,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 17:58:11,158 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:11,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:11,159 INFO L85 PathProgramCache]: Analyzing trace with hash 371914840, now seen corresponding path program 9 times [2024-06-27 17:58:11,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:11,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200243935] [2024-06-27 17:58:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:11,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:11,256 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 17:58:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:11,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200243935] [2024-06-27 17:58:11,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200243935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:11,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:11,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:11,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773680389] [2024-06-27 17:58:11,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:11,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:11,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:11,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:11,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 513 transitions, 6519 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:11,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:11,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:12,550 INFO L124 PetriNetUnfolderBase]: 4566/7751 cut-off events. [2024-06-27 17:58:12,550 INFO L125 PetriNetUnfolderBase]: For 349863/349996 co-relation queries the response was YES. [2024-06-27 17:58:12,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46713 conditions, 7751 events. 4566/7751 cut-off events. For 349863/349996 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56721 event pairs, 844 based on Foata normal form. 133/7848 useless extension candidates. Maximal degree in co-relation 46551. Up to 6503 conditions per place. [2024-06-27 17:58:12,652 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 449 selfloop transitions, 88 changer transitions 0/552 dead transitions. [2024-06-27 17:58:12,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 552 transitions, 7697 flow [2024-06-27 17:58:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-06-27 17:58:12,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021739130434782 [2024-06-27 17:58:12,654 INFO L175 Difference]: Start difference. First operand has 401 places, 513 transitions, 6519 flow. Second operand 10 states and 277 transitions. [2024-06-27 17:58:12,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 552 transitions, 7697 flow [2024-06-27 17:58:15,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 552 transitions, 7531 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:15,595 INFO L231 Difference]: Finished difference. Result has 407 places, 513 transitions, 6535 flow [2024-06-27 17:58:15,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6535, PETRI_PLACES=407, PETRI_TRANSITIONS=513} [2024-06-27 17:58:15,596 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 357 predicate places. [2024-06-27 17:58:15,596 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 513 transitions, 6535 flow [2024-06-27 17:58:15,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:15,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:15,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:15,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 17:58:15,596 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:15,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 213401672, now seen corresponding path program 6 times [2024-06-27 17:58:15,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:15,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873946176] [2024-06-27 17:58:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:15,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873946176] [2024-06-27 17:58:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873946176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:15,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:15,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121846756] [2024-06-27 17:58:15,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:15,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:15,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:15,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:15,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 513 transitions, 6535 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:15,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:15,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:15,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:16,970 INFO L124 PetriNetUnfolderBase]: 4563/7823 cut-off events. [2024-06-27 17:58:16,970 INFO L125 PetriNetUnfolderBase]: For 354582/354707 co-relation queries the response was YES. [2024-06-27 17:58:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46715 conditions, 7823 events. 4563/7823 cut-off events. For 354582/354707 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 57713 event pairs, 905 based on Foata normal form. 125/7902 useless extension candidates. Maximal degree in co-relation 46553. Up to 6243 conditions per place. [2024-06-27 17:58:17,075 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 397 selfloop transitions, 136 changer transitions 0/548 dead transitions. [2024-06-27 17:58:17,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 548 transitions, 8061 flow [2024-06-27 17:58:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:58:17,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-27 17:58:17,076 INFO L175 Difference]: Start difference. First operand has 407 places, 513 transitions, 6535 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:58:17,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 548 transitions, 8061 flow [2024-06-27 17:58:20,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 548 transitions, 7835 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:20,312 INFO L231 Difference]: Finished difference. Result has 406 places, 513 transitions, 6587 flow [2024-06-27 17:58:20,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6587, PETRI_PLACES=406, PETRI_TRANSITIONS=513} [2024-06-27 17:58:20,312 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 356 predicate places. [2024-06-27 17:58:20,312 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 513 transitions, 6587 flow [2024-06-27 17:58:20,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:20,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:20,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:20,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 17:58:20,313 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:20,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash -975098994, now seen corresponding path program 7 times [2024-06-27 17:58:20,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:20,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680112637] [2024-06-27 17:58:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:20,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:20,405 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 17:58:20,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:20,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680112637] [2024-06-27 17:58:20,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680112637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:20,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:20,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:20,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864641288] [2024-06-27 17:58:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:20,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:20,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:20,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 513 transitions, 6587 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:20,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:20,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:20,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:21,730 INFO L124 PetriNetUnfolderBase]: 4663/7963 cut-off events. [2024-06-27 17:58:21,731 INFO L125 PetriNetUnfolderBase]: For 380530/380653 co-relation queries the response was YES. [2024-06-27 17:58:21,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48401 conditions, 7963 events. 4663/7963 cut-off events. For 380530/380653 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 58749 event pairs, 912 based on Foata normal form. 123/8039 useless extension candidates. Maximal degree in co-relation 48238. Up to 6339 conditions per place. [2024-06-27 17:58:21,843 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 396 selfloop transitions, 159 changer transitions 0/570 dead transitions. [2024-06-27 17:58:21,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 570 transitions, 8740 flow [2024-06-27 17:58:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:58:21,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:58:21,844 INFO L175 Difference]: Start difference. First operand has 406 places, 513 transitions, 6587 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:58:21,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 570 transitions, 8740 flow [2024-06-27 17:58:24,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 570 transitions, 8416 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:24,977 INFO L231 Difference]: Finished difference. Result has 408 places, 537 transitions, 7031 flow [2024-06-27 17:58:24,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7031, PETRI_PLACES=408, PETRI_TRANSITIONS=537} [2024-06-27 17:58:24,978 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 358 predicate places. [2024-06-27 17:58:24,978 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 537 transitions, 7031 flow [2024-06-27 17:58:24,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:24,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 17:58:24,978 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:24,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,979 INFO L85 PathProgramCache]: Analyzing trace with hash -979860594, now seen corresponding path program 8 times [2024-06-27 17:58:24,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382313166] [2024-06-27 17:58:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:25,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382313166] [2024-06-27 17:58:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382313166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:25,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:25,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399247643] [2024-06-27 17:58:25,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:25,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:25,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:25,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 537 transitions, 7031 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:25,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:25,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:26,587 INFO L124 PetriNetUnfolderBase]: 4685/7974 cut-off events. [2024-06-27 17:58:26,588 INFO L125 PetriNetUnfolderBase]: For 385798/385926 co-relation queries the response was YES. [2024-06-27 17:58:26,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48825 conditions, 7974 events. 4685/7974 cut-off events. For 385798/385926 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 58698 event pairs, 935 based on Foata normal form. 129/8053 useless extension candidates. Maximal degree in co-relation 48660. Up to 6811 conditions per place. [2024-06-27 17:58:26,682 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 509 selfloop transitions, 49 changer transitions 0/573 dead transitions. [2024-06-27 17:58:26,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 573 transitions, 8331 flow [2024-06-27 17:58:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 17:58:26,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:58:26,683 INFO L175 Difference]: Start difference. First operand has 408 places, 537 transitions, 7031 flow. Second operand 8 states and 224 transitions. [2024-06-27 17:58:26,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 573 transitions, 8331 flow [2024-06-27 17:58:29,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 573 transitions, 8086 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:29,834 INFO L231 Difference]: Finished difference. Result has 414 places, 543 transitions, 7000 flow [2024-06-27 17:58:29,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7000, PETRI_PLACES=414, PETRI_TRANSITIONS=543} [2024-06-27 17:58:29,835 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 364 predicate places. [2024-06-27 17:58:29,835 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 543 transitions, 7000 flow [2024-06-27 17:58:29,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:29,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:29,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 17:58:29,835 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:29,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash -217675706, now seen corresponding path program 10 times [2024-06-27 17:58:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:29,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670181214] [2024-06-27 17:58:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:29,920 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 17:58:29,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:29,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670181214] [2024-06-27 17:58:29,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670181214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:29,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:29,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:29,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536793338] [2024-06-27 17:58:29,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:29,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:29,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:29,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 543 transitions, 7000 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:29,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:29,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:29,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:31,338 INFO L124 PetriNetUnfolderBase]: 4738/8177 cut-off events. [2024-06-27 17:58:31,338 INFO L125 PetriNetUnfolderBase]: For 408880/409003 co-relation queries the response was YES. [2024-06-27 17:58:31,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49345 conditions, 8177 events. 4738/8177 cut-off events. For 408880/409003 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 61004 event pairs, 986 based on Foata normal form. 123/8259 useless extension candidates. Maximal degree in co-relation 49179. Up to 6672 conditions per place. [2024-06-27 17:58:31,451 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 466 selfloop transitions, 116 changer transitions 0/597 dead transitions. [2024-06-27 17:58:31,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 597 transitions, 9048 flow [2024-06-27 17:58:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:58:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:58:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-27 17:58:31,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968379446640316 [2024-06-27 17:58:31,453 INFO L175 Difference]: Start difference. First operand has 414 places, 543 transitions, 7000 flow. Second operand 11 states and 302 transitions. [2024-06-27 17:58:31,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 597 transitions, 9048 flow [2024-06-27 17:58:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 597 transitions, 8934 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:35,128 INFO L231 Difference]: Finished difference. Result has 423 places, 555 transitions, 7393 flow [2024-06-27 17:58:35,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6886, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7393, PETRI_PLACES=423, PETRI_TRANSITIONS=555} [2024-06-27 17:58:35,129 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-06-27 17:58:35,129 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 555 transitions, 7393 flow [2024-06-27 17:58:35,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:35,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:35,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:35,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 17:58:35,129 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:35,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash 537554160, now seen corresponding path program 9 times [2024-06-27 17:58:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395571647] [2024-06-27 17:58:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395571647] [2024-06-27 17:58:35,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395571647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:35,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:35,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:35,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885655717] [2024-06-27 17:58:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:35,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:35,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 555 transitions, 7393 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:35,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:35,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:35,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:36,653 INFO L124 PetriNetUnfolderBase]: 4749/8125 cut-off events. [2024-06-27 17:58:36,654 INFO L125 PetriNetUnfolderBase]: For 418050/418173 co-relation queries the response was YES. [2024-06-27 17:58:36,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49904 conditions, 8125 events. 4749/8125 cut-off events. For 418050/418173 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60147 event pairs, 923 based on Foata normal form. 123/8195 useless extension candidates. Maximal degree in co-relation 49734. Up to 6443 conditions per place. [2024-06-27 17:58:36,769 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 416 selfloop transitions, 161 changer transitions 0/592 dead transitions. [2024-06-27 17:58:36,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 592 transitions, 9443 flow [2024-06-27 17:58:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:58:36,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-27 17:58:36,770 INFO L175 Difference]: Start difference. First operand has 423 places, 555 transitions, 7393 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:58:36,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 592 transitions, 9443 flow [2024-06-27 17:58:39,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 592 transitions, 9186 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:39,543 INFO L231 Difference]: Finished difference. Result has 426 places, 558 transitions, 7504 flow [2024-06-27 17:58:39,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7504, PETRI_PLACES=426, PETRI_TRANSITIONS=558} [2024-06-27 17:58:39,543 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 376 predicate places. [2024-06-27 17:58:39,543 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 558 transitions, 7504 flow [2024-06-27 17:58:39,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:39,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:39,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:39,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 17:58:39,544 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:39,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1203000144, now seen corresponding path program 10 times [2024-06-27 17:58:39,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:39,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580758310] [2024-06-27 17:58:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:39,650 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 17:58:39,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580758310] [2024-06-27 17:58:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580758310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:39,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301635984] [2024-06-27 17:58:39,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:39,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:39,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 558 transitions, 7504 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:39,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:39,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:39,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:41,139 INFO L124 PetriNetUnfolderBase]: 4746/8120 cut-off events. [2024-06-27 17:58:41,140 INFO L125 PetriNetUnfolderBase]: For 422441/422564 co-relation queries the response was YES. [2024-06-27 17:58:41,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49837 conditions, 8120 events. 4746/8120 cut-off events. For 422441/422564 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 60146 event pairs, 922 based on Foata normal form. 123/8190 useless extension candidates. Maximal degree in co-relation 49668. Up to 6440 conditions per place. [2024-06-27 17:58:41,438 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 415 selfloop transitions, 162 changer transitions 0/592 dead transitions. [2024-06-27 17:58:41,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 592 transitions, 9522 flow [2024-06-27 17:58:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:58:41,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-27 17:58:41,439 INFO L175 Difference]: Start difference. First operand has 426 places, 558 transitions, 7504 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:58:41,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 592 transitions, 9522 flow [2024-06-27 17:58:43,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 592 transitions, 9258 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:43,994 INFO L231 Difference]: Finished difference. Result has 431 places, 558 transitions, 7570 flow [2024-06-27 17:58:43,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7570, PETRI_PLACES=431, PETRI_TRANSITIONS=558} [2024-06-27 17:58:43,999 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 381 predicate places. [2024-06-27 17:58:43,999 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 558 transitions, 7570 flow [2024-06-27 17:58:43,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:43,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:43,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:44,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 17:58:44,000 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:44,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1394920956, now seen corresponding path program 11 times [2024-06-27 17:58:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:44,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815273710] [2024-06-27 17:58:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:44,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:44,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:44,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815273710] [2024-06-27 17:58:44,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815273710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:44,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:44,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:44,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428245641] [2024-06-27 17:58:44,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:44,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:44,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:44,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:44,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 558 transitions, 7570 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:44,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:44,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:44,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:45,621 INFO L124 PetriNetUnfolderBase]: 4743/8097 cut-off events. [2024-06-27 17:58:45,621 INFO L125 PetriNetUnfolderBase]: For 425543/425638 co-relation queries the response was YES. [2024-06-27 17:58:45,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49824 conditions, 8097 events. 4743/8097 cut-off events. For 425543/425638 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 60286 event pairs, 1425 based on Foata normal form. 96/8103 useless extension candidates. Maximal degree in co-relation 49654. Up to 6868 conditions per place. [2024-06-27 17:58:45,731 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 523 selfloop transitions, 57 changer transitions 0/595 dead transitions. [2024-06-27 17:58:45,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 595 transitions, 9024 flow [2024-06-27 17:58:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-06-27 17:58:45,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 17:58:45,734 INFO L175 Difference]: Start difference. First operand has 431 places, 558 transitions, 7570 flow. Second operand 10 states and 275 transitions. [2024-06-27 17:58:45,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 595 transitions, 9024 flow [2024-06-27 17:58:48,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 595 transitions, 8686 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:48,977 INFO L231 Difference]: Finished difference. Result has 435 places, 558 transitions, 7352 flow [2024-06-27 17:58:48,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7232, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7352, PETRI_PLACES=435, PETRI_TRANSITIONS=558} [2024-06-27 17:58:48,977 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 385 predicate places. [2024-06-27 17:58:48,978 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 558 transitions, 7352 flow [2024-06-27 17:58:48,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:48,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:48,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:48,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 17:58:48,978 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:48,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1613470746, now seen corresponding path program 12 times [2024-06-27 17:58:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:48,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683468947] [2024-06-27 17:58:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:48,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:49,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:49,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683468947] [2024-06-27 17:58:49,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683468947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:49,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:49,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879428056] [2024-06-27 17:58:49,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:49,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:49,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:49,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:49,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:49,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 558 transitions, 7352 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:49,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:49,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:49,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:50,573 INFO L124 PetriNetUnfolderBase]: 4740/8086 cut-off events. [2024-06-27 17:58:50,573 INFO L125 PetriNetUnfolderBase]: For 424935/425031 co-relation queries the response was YES. [2024-06-27 17:58:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49292 conditions, 8086 events. 4740/8086 cut-off events. For 424935/425031 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 60142 event pairs, 1417 based on Foata normal form. 97/8095 useless extension candidates. Maximal degree in co-relation 49121. Up to 6865 conditions per place. [2024-06-27 17:58:50,681 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 517 selfloop transitions, 56 changer transitions 0/588 dead transitions. [2024-06-27 17:58:50,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 588 transitions, 8578 flow [2024-06-27 17:58:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:58:50,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 17:58:50,682 INFO L175 Difference]: Start difference. First operand has 435 places, 558 transitions, 7352 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:58:50,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 588 transitions, 8578 flow [2024-06-27 17:58:53,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 588 transitions, 8410 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:53,383 INFO L231 Difference]: Finished difference. Result has 437 places, 558 transitions, 7302 flow [2024-06-27 17:58:53,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7184, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7302, PETRI_PLACES=437, PETRI_TRANSITIONS=558} [2024-06-27 17:58:53,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 387 predicate places. [2024-06-27 17:58:53,383 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 558 transitions, 7302 flow [2024-06-27 17:58:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:53,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:53,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:53,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 17:58:53,384 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:53,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash -217468316, now seen corresponding path program 11 times [2024-06-27 17:58:53,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:53,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156147497] [2024-06-27 17:58:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156147497] [2024-06-27 17:58:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156147497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:53,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:53,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:53,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588809583] [2024-06-27 17:58:53,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:53,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:53,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:53,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:53,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:53,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:53,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 558 transitions, 7302 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:53,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:53,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:53,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:54,894 INFO L124 PetriNetUnfolderBase]: 4737/8039 cut-off events. [2024-06-27 17:58:54,894 INFO L125 PetriNetUnfolderBase]: For 425201/425334 co-relation queries the response was YES. [2024-06-27 17:58:54,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49044 conditions, 8039 events. 4737/8039 cut-off events. For 425201/425334 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 59147 event pairs, 845 based on Foata normal form. 133/8136 useless extension candidates. Maximal degree in co-relation 48872. Up to 6672 conditions per place. [2024-06-27 17:58:55,004 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 463 selfloop transitions, 115 changer transitions 0/593 dead transitions. [2024-06-27 17:58:55,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 593 transitions, 8950 flow [2024-06-27 17:58:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-27 17:58:55,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:58:55,005 INFO L175 Difference]: Start difference. First operand has 437 places, 558 transitions, 7302 flow. Second operand 9 states and 253 transitions. [2024-06-27 17:58:55,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 593 transitions, 8950 flow [2024-06-27 17:58:58,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 593 transitions, 8814 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:58,102 INFO L231 Difference]: Finished difference. Result has 439 places, 558 transitions, 7402 flow [2024-06-27 17:58:58,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7402, PETRI_PLACES=439, PETRI_TRANSITIONS=558} [2024-06-27 17:58:58,103 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 389 predicate places. [2024-06-27 17:58:58,103 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 558 transitions, 7402 flow [2024-06-27 17:58:58,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:58,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:58,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:58,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 17:58:58,104 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:58,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -223182236, now seen corresponding path program 12 times [2024-06-27 17:58:58,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:58,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574895220] [2024-06-27 17:58:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574895220] [2024-06-27 17:58:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574895220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:58,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:58,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:58,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298523042] [2024-06-27 17:58:58,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:58,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:58,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:58,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:58,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:58,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 558 transitions, 7402 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:58,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:58,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:58,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:59,726 INFO L124 PetriNetUnfolderBase]: 4734/8013 cut-off events. [2024-06-27 17:58:59,726 INFO L125 PetriNetUnfolderBase]: For 429037/429132 co-relation queries the response was YES. [2024-06-27 17:58:59,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49242 conditions, 8013 events. 4734/8013 cut-off events. For 429037/429132 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 59129 event pairs, 1462 based on Foata normal form. 96/8032 useless extension candidates. Maximal degree in co-relation 49069. Up to 6938 conditions per place. [2024-06-27 17:58:59,834 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 542 selfloop transitions, 31 changer transitions 0/588 dead transitions. [2024-06-27 17:58:59,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 588 transitions, 8628 flow [2024-06-27 17:58:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 17:58:59,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-06-27 17:58:59,835 INFO L175 Difference]: Start difference. First operand has 439 places, 558 transitions, 7402 flow. Second operand 8 states and 221 transitions. [2024-06-27 17:58:59,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 588 transitions, 8628 flow [2024-06-27 17:59:03,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 588 transitions, 8374 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 17:59:03,123 INFO L231 Difference]: Finished difference. Result has 439 places, 558 transitions, 7216 flow [2024-06-27 17:59:03,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7148, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7216, PETRI_PLACES=439, PETRI_TRANSITIONS=558} [2024-06-27 17:59:03,124 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 389 predicate places. [2024-06-27 17:59:03,124 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 558 transitions, 7216 flow [2024-06-27 17:59:03,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:03,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:03,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:03,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 17:59:03,124 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:03,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash -365377376, now seen corresponding path program 3 times [2024-06-27 17:59:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879810949] [2024-06-27 17:59:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:03,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:03,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879810949] [2024-06-27 17:59:03,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879810949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:03,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:03,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897179611] [2024-06-27 17:59:03,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:03,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:03,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:03,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 558 transitions, 7216 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:03,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:03,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:03,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:04,740 INFO L124 PetriNetUnfolderBase]: 4798/8156 cut-off events. [2024-06-27 17:59:04,740 INFO L125 PetriNetUnfolderBase]: For 460976/461104 co-relation queries the response was YES. [2024-06-27 17:59:04,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49504 conditions, 8156 events. 4798/8156 cut-off events. For 460976/461104 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60218 event pairs, 936 based on Foata normal form. 134/8239 useless extension candidates. Maximal degree in co-relation 49330. Up to 6833 conditions per place. [2024-06-27 17:59:04,845 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 535 selfloop transitions, 48 changer transitions 0/598 dead transitions. [2024-06-27 17:59:04,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 598 transitions, 8575 flow [2024-06-27 17:59:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 17:59:04,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222826086956522 [2024-06-27 17:59:04,847 INFO L175 Difference]: Start difference. First operand has 439 places, 558 transitions, 7216 flow. Second operand 8 states and 229 transitions. [2024-06-27 17:59:04,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 598 transitions, 8575 flow [2024-06-27 17:59:07,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 598 transitions, 8489 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:07,754 INFO L231 Difference]: Finished difference. Result has 441 places, 561 transitions, 7291 flow [2024-06-27 17:59:07,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7130, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7291, PETRI_PLACES=441, PETRI_TRANSITIONS=561} [2024-06-27 17:59:07,755 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 391 predicate places. [2024-06-27 17:59:07,755 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 561 transitions, 7291 flow [2024-06-27 17:59:07,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:07,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:07,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:07,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 17:59:07,755 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:07,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1904072334, now seen corresponding path program 1 times [2024-06-27 17:59:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:07,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983466563] [2024-06-27 17:59:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:07,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983466563] [2024-06-27 17:59:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983466563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:07,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:07,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:07,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008140383] [2024-06-27 17:59:07,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:07,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:07,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 561 transitions, 7291 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:07,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:07,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:07,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:09,345 INFO L124 PetriNetUnfolderBase]: 4839/8340 cut-off events. [2024-06-27 17:59:09,345 INFO L125 PetriNetUnfolderBase]: For 462777/462908 co-relation queries the response was YES. [2024-06-27 17:59:09,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50585 conditions, 8340 events. 4839/8340 cut-off events. For 462777/462908 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 62321 event pairs, 995 based on Foata normal form. 130/8426 useless extension candidates. Maximal degree in co-relation 50409. Up to 6846 conditions per place. [2024-06-27 17:59:09,456 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 498 selfloop transitions, 94 changer transitions 0/607 dead transitions. [2024-06-27 17:59:09,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 607 transitions, 8875 flow [2024-06-27 17:59:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:59:09,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:59:09,458 INFO L175 Difference]: Start difference. First operand has 441 places, 561 transitions, 7291 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:59:09,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 607 transitions, 8875 flow [2024-06-27 17:59:12,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 607 transitions, 8765 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:12,374 INFO L231 Difference]: Finished difference. Result has 444 places, 565 transitions, 7462 flow [2024-06-27 17:59:12,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7462, PETRI_PLACES=444, PETRI_TRANSITIONS=565} [2024-06-27 17:59:12,374 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 394 predicate places. [2024-06-27 17:59:12,374 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 565 transitions, 7462 flow [2024-06-27 17:59:12,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:12,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:12,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:12,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 17:59:12,375 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:12,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:12,375 INFO L85 PathProgramCache]: Analyzing trace with hash 254042486, now seen corresponding path program 2 times [2024-06-27 17:59:12,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:12,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767152214] [2024-06-27 17:59:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:12,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:12,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:12,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767152214] [2024-06-27 17:59:12,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767152214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:12,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835936218] [2024-06-27 17:59:12,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:12,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:12,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:12,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 565 transitions, 7462 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:13,926 INFO L124 PetriNetUnfolderBase]: 4857/8202 cut-off events. [2024-06-27 17:59:13,926 INFO L125 PetriNetUnfolderBase]: For 469275/469406 co-relation queries the response was YES. [2024-06-27 17:59:14,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50882 conditions, 8202 events. 4857/8202 cut-off events. For 469275/469406 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 60381 event pairs, 871 based on Foata normal form. 130/8290 useless extension candidates. Maximal degree in co-relation 50705. Up to 6925 conditions per place. [2024-06-27 17:59:14,038 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 498 selfloop transitions, 91 changer transitions 0/604 dead transitions. [2024-06-27 17:59:14,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 604 transitions, 8784 flow [2024-06-27 17:59:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:59:14,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 17:59:14,039 INFO L175 Difference]: Start difference. First operand has 444 places, 565 transitions, 7462 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:59:14,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 604 transitions, 8784 flow [2024-06-27 17:59:17,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 604 transitions, 8598 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:17,505 INFO L231 Difference]: Finished difference. Result has 448 places, 567 transitions, 7513 flow [2024-06-27 17:59:17,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7298, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7513, PETRI_PLACES=448, PETRI_TRANSITIONS=567} [2024-06-27 17:59:17,505 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 398 predicate places. [2024-06-27 17:59:17,506 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 567 transitions, 7513 flow [2024-06-27 17:59:17,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:17,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:17,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:17,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 17:59:17,506 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:17,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 372130166, now seen corresponding path program 3 times [2024-06-27 17:59:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263094965] [2024-06-27 17:59:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:17,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:17,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263094965] [2024-06-27 17:59:17,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263094965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:17,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:17,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537929841] [2024-06-27 17:59:17,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:17,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:17,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:17,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:17,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 567 transitions, 7513 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:17,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:17,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:17,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:19,112 INFO L124 PetriNetUnfolderBase]: 4875/8140 cut-off events. [2024-06-27 17:59:19,112 INFO L125 PetriNetUnfolderBase]: For 475566/475699 co-relation queries the response was YES. [2024-06-27 17:59:19,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51028 conditions, 8140 events. 4875/8140 cut-off events. For 475566/475699 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 59428 event pairs, 836 based on Foata normal form. 134/8228 useless extension candidates. Maximal degree in co-relation 50849. Up to 7089 conditions per place. [2024-06-27 17:59:19,213 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 540 selfloop transitions, 48 changer transitions 0/603 dead transitions. [2024-06-27 17:59:19,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 603 transitions, 8807 flow [2024-06-27 17:59:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 17:59:19,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 17:59:19,214 INFO L175 Difference]: Start difference. First operand has 448 places, 567 transitions, 7513 flow. Second operand 8 states and 225 transitions. [2024-06-27 17:59:19,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 603 transitions, 8807 flow [2024-06-27 17:59:23,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 603 transitions, 8612 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:23,230 INFO L231 Difference]: Finished difference. Result has 450 places, 569 transitions, 7451 flow [2024-06-27 17:59:23,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7318, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7451, PETRI_PLACES=450, PETRI_TRANSITIONS=569} [2024-06-27 17:59:23,231 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 400 predicate places. [2024-06-27 17:59:23,231 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 569 transitions, 7451 flow [2024-06-27 17:59:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:23,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:23,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:23,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 17:59:23,231 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:23,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash 372314864, now seen corresponding path program 1 times [2024-06-27 17:59:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:23,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108233689] [2024-06-27 17:59:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:23,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:23,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:23,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108233689] [2024-06-27 17:59:23,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108233689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:23,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:23,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:23,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383508678] [2024-06-27 17:59:23,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:23,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:23,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:23,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:23,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 569 transitions, 7451 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:23,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:23,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:23,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:24,879 INFO L124 PetriNetUnfolderBase]: 4893/8329 cut-off events. [2024-06-27 17:59:24,879 INFO L125 PetriNetUnfolderBase]: For 487023/487152 co-relation queries the response was YES. [2024-06-27 17:59:24,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51297 conditions, 8329 events. 4893/8329 cut-off events. For 487023/487152 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 61755 event pairs, 943 based on Foata normal form. 130/8405 useless extension candidates. Maximal degree in co-relation 51117. Up to 6989 conditions per place. [2024-06-27 17:59:24,996 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 499 selfloop transitions, 91 changer transitions 0/605 dead transitions. [2024-06-27 17:59:24,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 605 transitions, 8769 flow [2024-06-27 17:59:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:59:24,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:59:24,998 INFO L175 Difference]: Start difference. First operand has 450 places, 569 transitions, 7451 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:59:24,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 605 transitions, 8769 flow [2024-06-27 17:59:28,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 605 transitions, 8672 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:28,467 INFO L231 Difference]: Finished difference. Result has 454 places, 571 transitions, 7593 flow [2024-06-27 17:59:28,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7354, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7593, PETRI_PLACES=454, PETRI_TRANSITIONS=571} [2024-06-27 17:59:28,468 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 404 predicate places. [2024-06-27 17:59:28,468 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 571 transitions, 7593 flow [2024-06-27 17:59:28,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:28,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:28,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 17:59:28,469 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:28,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1203170954, now seen corresponding path program 4 times [2024-06-27 17:59:28,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:28,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150713632] [2024-06-27 17:59:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:28,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:28,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:28,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150713632] [2024-06-27 17:59:28,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150713632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:28,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:28,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:28,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395359264] [2024-06-27 17:59:28,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:28,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:28,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:28,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:28,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:28,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:28,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 571 transitions, 7593 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:28,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:28,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:28,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:30,123 INFO L124 PetriNetUnfolderBase]: 4911/8401 cut-off events. [2024-06-27 17:59:30,123 INFO L125 PetriNetUnfolderBase]: For 496870/496999 co-relation queries the response was YES. [2024-06-27 17:59:30,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51849 conditions, 8401 events. 4911/8401 cut-off events. For 496870/496999 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 62500 event pairs, 1022 based on Foata normal form. 130/8481 useless extension candidates. Maximal degree in co-relation 51668. Up to 7127 conditions per place. [2024-06-27 17:59:30,241 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 538 selfloop transitions, 54 changer transitions 0/607 dead transitions. [2024-06-27 17:59:30,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 607 transitions, 8899 flow [2024-06-27 17:59:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:59:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:59:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 17:59:30,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-06-27 17:59:30,242 INFO L175 Difference]: Start difference. First operand has 454 places, 571 transitions, 7593 flow. Second operand 9 states and 246 transitions. [2024-06-27 17:59:30,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 607 transitions, 8899 flow [2024-06-27 17:59:34,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 607 transitions, 8676 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:34,171 INFO L231 Difference]: Finished difference. Result has 457 places, 573 transitions, 7519 flow [2024-06-27 17:59:34,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7519, PETRI_PLACES=457, PETRI_TRANSITIONS=573} [2024-06-27 17:59:34,172 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 407 predicate places. [2024-06-27 17:59:34,172 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 573 transitions, 7519 flow [2024-06-27 17:59:34,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:34,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:34,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:34,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 17:59:34,172 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:34,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -975085106, now seen corresponding path program 2 times [2024-06-27 17:59:34,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:34,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171568177] [2024-06-27 17:59:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:34,277 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 17:59:34,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:34,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171568177] [2024-06-27 17:59:34,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171568177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:34,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:34,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65117470] [2024-06-27 17:59:34,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:34,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:34,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:34,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:34,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:34,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:34,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 573 transitions, 7519 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:34,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:34,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:34,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:35,763 INFO L124 PetriNetUnfolderBase]: 4929/8388 cut-off events. [2024-06-27 17:59:35,763 INFO L125 PetriNetUnfolderBase]: For 504516/504645 co-relation queries the response was YES. [2024-06-27 17:59:35,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51845 conditions, 8388 events. 4929/8388 cut-off events. For 504516/504645 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 62162 event pairs, 950 based on Foata normal form. 130/8464 useless extension candidates. Maximal degree in co-relation 51663. Up to 7041 conditions per place. [2024-06-27 17:59:35,873 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 500 selfloop transitions, 91 changer transitions 0/606 dead transitions. [2024-06-27 17:59:35,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 606 transitions, 8835 flow [2024-06-27 17:59:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 17:59:35,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 17:59:35,874 INFO L175 Difference]: Start difference. First operand has 457 places, 573 transitions, 7519 flow. Second operand 8 states and 225 transitions. [2024-06-27 17:59:35,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 606 transitions, 8835 flow [2024-06-27 17:59:39,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 606 transitions, 8706 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:39,795 INFO L231 Difference]: Finished difference. Result has 458 places, 575 transitions, 7633 flow [2024-06-27 17:59:39,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7390, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7633, PETRI_PLACES=458, PETRI_TRANSITIONS=575} [2024-06-27 17:59:39,795 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 408 predicate places. [2024-06-27 17:59:39,795 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 575 transitions, 7633 flow [2024-06-27 17:59:39,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:39,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:39,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:39,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 17:59:39,796 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:39,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:39,796 INFO L85 PathProgramCache]: Analyzing trace with hash -217275682, now seen corresponding path program 3 times [2024-06-27 17:59:39,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:39,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507233565] [2024-06-27 17:59:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:39,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:39,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:39,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507233565] [2024-06-27 17:59:39,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507233565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:39,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:39,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:39,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198194971] [2024-06-27 17:59:39,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:39,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:39,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:39,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:39,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 575 transitions, 7633 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:39,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:39,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:39,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:41,400 INFO L124 PetriNetUnfolderBase]: 4947/8331 cut-off events. [2024-06-27 17:59:41,400 INFO L125 PetriNetUnfolderBase]: For 512510/512643 co-relation queries the response was YES. [2024-06-27 17:59:41,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52300 conditions, 8331 events. 4947/8331 cut-off events. For 512510/512643 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61298 event pairs, 895 based on Foata normal form. 134/8416 useless extension candidates. Maximal degree in co-relation 52117. Up to 7067 conditions per place. [2024-06-27 17:59:41,715 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 504 selfloop transitions, 89 changer transitions 0/608 dead transitions. [2024-06-27 17:59:41,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 608 transitions, 8957 flow [2024-06-27 17:59:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:59:41,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 17:59:41,716 INFO L175 Difference]: Start difference. First operand has 458 places, 575 transitions, 7633 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:59:41,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 608 transitions, 8957 flow [2024-06-27 17:59:45,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 608 transitions, 8730 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:45,520 INFO L231 Difference]: Finished difference. Result has 460 places, 577 transitions, 7649 flow [2024-06-27 17:59:45,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7406, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7649, PETRI_PLACES=460, PETRI_TRANSITIONS=577} [2024-06-27 17:59:45,520 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 410 predicate places. [2024-06-27 17:59:45,521 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 577 transitions, 7649 flow [2024-06-27 17:59:45,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:45,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:45,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:45,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 17:59:45,521 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:45,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:45,521 INFO L85 PathProgramCache]: Analyzing trace with hash 817325204, now seen corresponding path program 4 times [2024-06-27 17:59:45,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:45,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055167571] [2024-06-27 17:59:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:45,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:45,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055167571] [2024-06-27 17:59:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055167571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:45,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573020521] [2024-06-27 17:59:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:45,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:45,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 577 transitions, 7649 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:45,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:45,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:45,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:47,146 INFO L124 PetriNetUnfolderBase]: 4988/8468 cut-off events. [2024-06-27 17:59:47,147 INFO L125 PetriNetUnfolderBase]: For 539250/539379 co-relation queries the response was YES. [2024-06-27 17:59:47,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53270 conditions, 8468 events. 4988/8468 cut-off events. For 539250/539379 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 62793 event pairs, 945 based on Foata normal form. 130/8544 useless extension candidates. Maximal degree in co-relation 53086. Up to 7049 conditions per place. [2024-06-27 17:59:47,268 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 501 selfloop transitions, 99 changer transitions 0/615 dead transitions. [2024-06-27 17:59:47,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 615 transitions, 9289 flow [2024-06-27 17:59:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:59:47,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 17:59:47,270 INFO L175 Difference]: Start difference. First operand has 460 places, 577 transitions, 7649 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:59:47,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 615 transitions, 9289 flow [2024-06-27 17:59:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 615 transitions, 9062 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:51,152 INFO L231 Difference]: Finished difference. Result has 463 places, 582 transitions, 7779 flow [2024-06-27 17:59:51,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7779, PETRI_PLACES=463, PETRI_TRANSITIONS=582} [2024-06-27 17:59:51,153 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 413 predicate places. [2024-06-27 17:59:51,153 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 582 transitions, 7779 flow [2024-06-27 17:59:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:51,153 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 17:59:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 17:59:51,154 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:51,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1758297598, now seen corresponding path program 13 times [2024-06-27 17:59:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655696806] [2024-06-27 17:59:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:51,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:51,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655696806] [2024-06-27 17:59:51,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655696806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:51,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:51,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:51,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772418576] [2024-06-27 17:59:51,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:51,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:51,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:51,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 582 transitions, 7779 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:51,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:51,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:51,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:52,819 INFO L124 PetriNetUnfolderBase]: 5013/8678 cut-off events. [2024-06-27 17:59:52,819 INFO L125 PetriNetUnfolderBase]: For 551571/551693 co-relation queries the response was YES. [2024-06-27 17:59:52,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54119 conditions, 8678 events. 5013/8678 cut-off events. For 551571/551693 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 65577 event pairs, 1030 based on Foata normal form. 123/8760 useless extension candidates. Maximal degree in co-relation 53933. Up to 6782 conditions per place. [2024-06-27 17:59:52,938 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 423 selfloop transitions, 188 changer transitions 0/626 dead transitions. [2024-06-27 17:59:52,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 626 transitions, 9677 flow [2024-06-27 17:59:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:59:52,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:59:52,939 INFO L175 Difference]: Start difference. First operand has 463 places, 582 transitions, 7779 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:59:52,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 626 transitions, 9677 flow [2024-06-27 17:59:57,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 626 transitions, 9489 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:57,155 INFO L231 Difference]: Finished difference. Result has 467 places, 588 transitions, 8105 flow [2024-06-27 17:59:57,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8105, PETRI_PLACES=467, PETRI_TRANSITIONS=588} [2024-06-27 17:59:57,155 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 417 predicate places. [2024-06-27 17:59:57,156 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 588 transitions, 8105 flow [2024-06-27 17:59:57,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:57,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:57,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:57,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 17:59:57,156 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:57,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2081973088, now seen corresponding path program 14 times [2024-06-27 17:59:57,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:57,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105781390] [2024-06-27 17:59:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:57,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105781390] [2024-06-27 17:59:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105781390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:57,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:57,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174234253] [2024-06-27 17:59:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:57,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:57,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 588 transitions, 8105 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:57,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:57,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:58,934 INFO L124 PetriNetUnfolderBase]: 5024/8670 cut-off events. [2024-06-27 17:59:58,935 INFO L125 PetriNetUnfolderBase]: For 558423/558545 co-relation queries the response was YES. [2024-06-27 17:59:59,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54702 conditions, 8670 events. 5024/8670 cut-off events. For 558423/558545 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 65398 event pairs, 1031 based on Foata normal form. 123/8752 useless extension candidates. Maximal degree in co-relation 54514. Up to 6794 conditions per place. [2024-06-27 17:59:59,040 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 423 selfloop transitions, 188 changer transitions 0/626 dead transitions. [2024-06-27 17:59:59,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 626 transitions, 9939 flow [2024-06-27 17:59:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:59:59,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-27 17:59:59,041 INFO L175 Difference]: Start difference. First operand has 467 places, 588 transitions, 8105 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:59:59,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 626 transitions, 9939 flow [2024-06-27 18:00:02,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 626 transitions, 9559 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:02,819 INFO L231 Difference]: Finished difference. Result has 471 places, 591 transitions, 8179 flow [2024-06-27 18:00:02,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8179, PETRI_PLACES=471, PETRI_TRANSITIONS=591} [2024-06-27 18:00:02,819 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 421 predicate places. [2024-06-27 18:00:02,819 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 591 transitions, 8179 flow [2024-06-27 18:00:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:02,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:02,820 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 18:00:02,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 18:00:02,820 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:02,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash -436375072, now seen corresponding path program 15 times [2024-06-27 18:00:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204266524] [2024-06-27 18:00:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:02,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:02,912 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 18:00:02,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:02,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204266524] [2024-06-27 18:00:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204266524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:02,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355409711] [2024-06-27 18:00:02,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 591 transitions, 8179 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:04,591 INFO L124 PetriNetUnfolderBase]: 5049/8726 cut-off events. [2024-06-27 18:00:04,591 INFO L125 PetriNetUnfolderBase]: For 574491/574613 co-relation queries the response was YES. [2024-06-27 18:00:04,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55034 conditions, 8726 events. 5049/8726 cut-off events. For 574491/574613 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 65904 event pairs, 1035 based on Foata normal form. 123/8807 useless extension candidates. Maximal degree in co-relation 54845. Up to 6821 conditions per place. [2024-06-27 18:00:04,752 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 415 selfloop transitions, 199 changer transitions 0/629 dead transitions. [2024-06-27 18:00:04,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 629 transitions, 10049 flow [2024-06-27 18:00:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 18:00:04,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:00:04,754 INFO L175 Difference]: Start difference. First operand has 471 places, 591 transitions, 8179 flow. Second operand 8 states and 230 transitions. [2024-06-27 18:00:04,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 629 transitions, 10049 flow [2024-06-27 18:00:10,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 629 transitions, 9658 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:00:10,238 INFO L231 Difference]: Finished difference. Result has 474 places, 597 transitions, 8298 flow [2024-06-27 18:00:10,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7797, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8298, PETRI_PLACES=474, PETRI_TRANSITIONS=597} [2024-06-27 18:00:10,239 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 424 predicate places. [2024-06-27 18:00:10,239 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 597 transitions, 8298 flow [2024-06-27 18:00:10,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:10,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:10,239 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 18:00:10,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 18:00:10,239 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:10,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1143136702, now seen corresponding path program 16 times [2024-06-27 18:00:10,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:10,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898923412] [2024-06-27 18:00:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898923412] [2024-06-27 18:00:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898923412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:10,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:10,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383601486] [2024-06-27 18:00:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:10,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:10,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:10,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 597 transitions, 8298 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:10,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:10,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:10,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:13,767 INFO L124 PetriNetUnfolderBase]: 5102/8798 cut-off events. [2024-06-27 18:00:13,768 INFO L125 PetriNetUnfolderBase]: For 600222/600344 co-relation queries the response was YES. [2024-06-27 18:00:13,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55630 conditions, 8798 events. 5102/8798 cut-off events. For 600222/600344 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 66469 event pairs, 1065 based on Foata normal form. 123/8871 useless extension candidates. Maximal degree in co-relation 55440. Up to 6878 conditions per place. [2024-06-27 18:00:13,929 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 439 selfloop transitions, 195 changer transitions 0/649 dead transitions. [2024-06-27 18:00:13,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 649 transitions, 10828 flow [2024-06-27 18:00:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 18:00:13,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 18:00:13,931 INFO L175 Difference]: Start difference. First operand has 474 places, 597 transitions, 8298 flow. Second operand 8 states and 240 transitions. [2024-06-27 18:00:13,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 649 transitions, 10828 flow [2024-06-27 18:00:20,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 649 transitions, 10516 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:20,344 INFO L231 Difference]: Finished difference. Result has 478 places, 609 transitions, 8628 flow [2024-06-27 18:00:20,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8022, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8628, PETRI_PLACES=478, PETRI_TRANSITIONS=609} [2024-06-27 18:00:20,345 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 428 predicate places. [2024-06-27 18:00:20,345 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 609 transitions, 8628 flow [2024-06-27 18:00:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:20,345 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 18:00:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 18:00:20,345 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:20,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1132661182, now seen corresponding path program 17 times [2024-06-27 18:00:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:20,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741884943] [2024-06-27 18:00:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:20,458 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 18:00:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741884943] [2024-06-27 18:00:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741884943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:20,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:20,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:20,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547036090] [2024-06-27 18:00:20,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:20,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:20,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:20,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:20,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 609 transitions, 8628 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:20,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:20,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:20,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:23,808 INFO L124 PetriNetUnfolderBase]: 5099/8487 cut-off events. [2024-06-27 18:00:23,808 INFO L125 PetriNetUnfolderBase]: For 599920/600048 co-relation queries the response was YES. [2024-06-27 18:00:23,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55216 conditions, 8487 events. 5099/8487 cut-off events. For 599920/600048 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 62350 event pairs, 816 based on Foata normal form. 129/8575 useless extension candidates. Maximal degree in co-relation 55025. Up to 6875 conditions per place. [2024-06-27 18:00:23,969 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 438 selfloop transitions, 193 changer transitions 0/646 dead transitions. [2024-06-27 18:00:23,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 646 transitions, 10906 flow [2024-06-27 18:00:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 18:00:23,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 18:00:23,985 INFO L175 Difference]: Start difference. First operand has 478 places, 609 transitions, 8628 flow. Second operand 8 states and 237 transitions. [2024-06-27 18:00:23,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 646 transitions, 10906 flow [2024-06-27 18:00:30,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 646 transitions, 10264 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:30,617 INFO L231 Difference]: Finished difference. Result has 480 places, 609 transitions, 8378 flow [2024-06-27 18:00:30,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7986, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8378, PETRI_PLACES=480, PETRI_TRANSITIONS=609} [2024-06-27 18:00:30,618 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 430 predicate places. [2024-06-27 18:00:30,618 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 609 transitions, 8378 flow [2024-06-27 18:00:30,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:30,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:30,618 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 18:00:30,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 18:00:30,619 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:30,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:30,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1342438492, now seen corresponding path program 18 times [2024-06-27 18:00:30,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:30,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28322112] [2024-06-27 18:00:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:30,712 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 18:00:30,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:30,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28322112] [2024-06-27 18:00:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28322112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:30,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:30,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:30,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922786430] [2024-06-27 18:00:30,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:30,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:30,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:30,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 609 transitions, 8378 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:30,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:30,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:30,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:32,701 INFO L124 PetriNetUnfolderBase]: 5096/8790 cut-off events. [2024-06-27 18:00:32,702 INFO L125 PetriNetUnfolderBase]: For 601818/601940 co-relation queries the response was YES. [2024-06-27 18:00:32,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55182 conditions, 8790 events. 5096/8790 cut-off events. For 601818/601940 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 66406 event pairs, 1065 based on Foata normal form. 123/8863 useless extension candidates. Maximal degree in co-relation 54990. Up to 6872 conditions per place. [2024-06-27 18:00:32,816 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 433 selfloop transitions, 200 changer transitions 0/648 dead transitions. [2024-06-27 18:00:32,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 648 transitions, 10442 flow [2024-06-27 18:00:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 18:00:32,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 18:00:32,818 INFO L175 Difference]: Start difference. First operand has 480 places, 609 transitions, 8378 flow. Second operand 8 states and 238 transitions. [2024-06-27 18:00:32,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 648 transitions, 10442 flow [2024-06-27 18:00:37,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 648 transitions, 10023 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 18:00:37,907 INFO L231 Difference]: Finished difference. Result has 483 places, 609 transitions, 8365 flow [2024-06-27 18:00:37,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7959, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8365, PETRI_PLACES=483, PETRI_TRANSITIONS=609} [2024-06-27 18:00:37,908 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 433 predicate places. [2024-06-27 18:00:37,908 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 609 transitions, 8365 flow [2024-06-27 18:00:37,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:37,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:37,908 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 18:00:37,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 18:00:37,909 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:37,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1342318522, now seen corresponding path program 19 times [2024-06-27 18:00:37,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:37,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338938818] [2024-06-27 18:00:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:38,023 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 18:00:38,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:38,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338938818] [2024-06-27 18:00:38,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338938818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:38,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:38,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792210812] [2024-06-27 18:00:38,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:38,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:38,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:38,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:38,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:38,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 609 transitions, 8365 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:38,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:38,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:38,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:40,901 INFO L124 PetriNetUnfolderBase]: 5118/8803 cut-off events. [2024-06-27 18:00:40,902 INFO L125 PetriNetUnfolderBase]: For 612343/612465 co-relation queries the response was YES. [2024-06-27 18:00:41,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55454 conditions, 8803 events. 5118/8803 cut-off events. For 612343/612465 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 66387 event pairs, 1052 based on Foata normal form. 123/8869 useless extension candidates. Maximal degree in co-relation 55261. Up to 7295 conditions per place. [2024-06-27 18:00:41,045 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 544 selfloop transitions, 89 changer transitions 0/648 dead transitions. [2024-06-27 18:00:41,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 648 transitions, 9813 flow [2024-06-27 18:00:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 18:00:41,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 18:00:41,046 INFO L175 Difference]: Start difference. First operand has 483 places, 609 transitions, 8365 flow. Second operand 8 states and 228 transitions. [2024-06-27 18:00:41,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 648 transitions, 9813 flow [2024-06-27 18:00:47,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 648 transitions, 9347 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 18:00:47,705 INFO L231 Difference]: Finished difference. Result has 484 places, 615 transitions, 8183 flow [2024-06-27 18:00:47,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7917, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8183, PETRI_PLACES=484, PETRI_TRANSITIONS=615} [2024-06-27 18:00:47,706 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 434 predicate places. [2024-06-27 18:00:47,706 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 615 transitions, 8183 flow [2024-06-27 18:00:47,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:47,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:47,706 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 18:00:47,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 18:00:47,707 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:47,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1912600880, now seen corresponding path program 13 times [2024-06-27 18:00:47,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:47,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155424723] [2024-06-27 18:00:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:47,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:47,823 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 18:00:47,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155424723] [2024-06-27 18:00:47,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155424723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:47,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:47,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041465132] [2024-06-27 18:00:47,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:47,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:47,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 615 transitions, 8183 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:47,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:47,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:47,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:50,257 INFO L124 PetriNetUnfolderBase]: 5129/8533 cut-off events. [2024-06-27 18:00:50,257 INFO L125 PetriNetUnfolderBase]: For 614656/614784 co-relation queries the response was YES. [2024-06-27 18:00:50,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54778 conditions, 8533 events. 5129/8533 cut-off events. For 614656/614784 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62675 event pairs, 866 based on Foata normal form. 129/8609 useless extension candidates. Maximal degree in co-relation 54584. Up to 6978 conditions per place. [2024-06-27 18:00:50,424 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 463 selfloop transitions, 175 changer transitions 0/653 dead transitions. [2024-06-27 18:00:50,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 653 transitions, 10079 flow [2024-06-27 18:00:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 18:00:50,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-27 18:00:50,425 INFO L175 Difference]: Start difference. First operand has 484 places, 615 transitions, 8183 flow. Second operand 8 states and 234 transitions. [2024-06-27 18:00:50,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 653 transitions, 10079 flow [2024-06-27 18:00:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 653 transitions, 9889 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 18:00:57,142 INFO L231 Difference]: Finished difference. Result has 487 places, 618 transitions, 8405 flow [2024-06-27 18:00:57,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8405, PETRI_PLACES=487, PETRI_TRANSITIONS=618} [2024-06-27 18:00:57,143 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 437 predicate places. [2024-06-27 18:00:57,143 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 618 transitions, 8405 flow [2024-06-27 18:00:57,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:57,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:57,143 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 18:00:57,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 18:00:57,144 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:57,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2057239346, now seen corresponding path program 14 times [2024-06-27 18:00:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:57,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148901875] [2024-06-27 18:00:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:57,246 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 18:00:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:57,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148901875] [2024-06-27 18:00:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148901875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:57,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005799098] [2024-06-27 18:00:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:57,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:57,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 618 transitions, 8405 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:57,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:57,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:57,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:59,285 INFO L124 PetriNetUnfolderBase]: 5140/8739 cut-off events. [2024-06-27 18:00:59,285 INFO L125 PetriNetUnfolderBase]: For 630296/630418 co-relation queries the response was YES. [2024-06-27 18:00:59,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55537 conditions, 8739 events. 5140/8739 cut-off events. For 630296/630418 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 65488 event pairs, 970 based on Foata normal form. 123/8797 useless extension candidates. Maximal degree in co-relation 55342. Up to 6990 conditions per place. [2024-06-27 18:00:59,620 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 467 selfloop transitions, 172 changer transitions 0/654 dead transitions. [2024-06-27 18:00:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 654 transitions, 10545 flow [2024-06-27 18:00:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 18:00:59,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-27 18:00:59,621 INFO L175 Difference]: Start difference. First operand has 487 places, 618 transitions, 8405 flow. Second operand 8 states and 233 transitions. [2024-06-27 18:00:59,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 654 transitions, 10545 flow [2024-06-27 18:01:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 654 transitions, 9991 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 18:01:04,032 INFO L231 Difference]: Finished difference. Result has 488 places, 621 transitions, 8263 flow [2024-06-27 18:01:04,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8263, PETRI_PLACES=488, PETRI_TRANSITIONS=621} [2024-06-27 18:01:04,033 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 438 predicate places. [2024-06-27 18:01:04,033 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 621 transitions, 8263 flow [2024-06-27 18:01:04,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:04,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:04,033 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 18:01:04,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 18:01:04,033 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:04,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1017577216, now seen corresponding path program 15 times [2024-06-27 18:01:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:04,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3249019] [2024-06-27 18:01:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:04,126 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 18:01:04,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3249019] [2024-06-27 18:01:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3249019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:04,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:04,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287328255] [2024-06-27 18:01:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:04,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:04,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:01:04,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 621 transitions, 8263 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:04,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:04,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:01:04,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:06,100 INFO L124 PetriNetUnfolderBase]: 5137/8745 cut-off events. [2024-06-27 18:01:06,100 INFO L125 PetriNetUnfolderBase]: For 629931/630053 co-relation queries the response was YES. [2024-06-27 18:01:06,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55016 conditions, 8745 events. 5137/8745 cut-off events. For 629931/630053 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 65624 event pairs, 975 based on Foata normal form. 123/8802 useless extension candidates. Maximal degree in co-relation 54821. Up to 6987 conditions per place. [2024-06-27 18:01:06,224 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 467 selfloop transitions, 171 changer transitions 0/653 dead transitions. [2024-06-27 18:01:06,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 653 transitions, 10103 flow [2024-06-27 18:01:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:01:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:01:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 18:01:06,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-27 18:01:06,226 INFO L175 Difference]: Start difference. First operand has 488 places, 621 transitions, 8263 flow. Second operand 8 states and 233 transitions. [2024-06-27 18:01:06,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 653 transitions, 10103 flow [2024-06-27 18:01:11,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 653 transitions, 9611 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 18:01:11,231 INFO L231 Difference]: Finished difference. Result has 490 places, 621 transitions, 8119 flow [2024-06-27 18:01:11,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7771, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8119, PETRI_PLACES=490, PETRI_TRANSITIONS=621} [2024-06-27 18:01:11,232 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 440 predicate places. [2024-06-27 18:01:11,232 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 621 transitions, 8119 flow [2024-06-27 18:01:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:11,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:11,233 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 18:01:11,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 18:01:11,233 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1017577402, now seen corresponding path program 20 times [2024-06-27 18:01:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518425175] [2024-06-27 18:01:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:11,324 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 18:01:11,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:11,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518425175] [2024-06-27 18:01:11,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518425175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:11,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:11,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:11,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091778604] [2024-06-27 18:01:11,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:11,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:11,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:11,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:01:11,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 621 transitions, 8119 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:11,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:11,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:01:11,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:13,467 INFO L124 PetriNetUnfolderBase]: 5134/8700 cut-off events. [2024-06-27 18:01:13,468 INFO L125 PetriNetUnfolderBase]: For 628757/628879 co-relation queries the response was YES. [2024-06-27 18:01:13,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54767 conditions, 8700 events. 5134/8700 cut-off events. For 628757/628879 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 65063 event pairs, 915 based on Foata normal form. 123/8767 useless extension candidates. Maximal degree in co-relation 54571. Up to 7295 conditions per place. [2024-06-27 18:01:13,585 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 547 selfloop transitions, 96 changer transitions 0/658 dead transitions. [2024-06-27 18:01:13,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 658 transitions, 9745 flow [2024-06-27 18:01:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:01:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:01:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-27 18:01:13,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 18:01:13,586 INFO L175 Difference]: Start difference. First operand has 490 places, 621 transitions, 8119 flow. Second operand 10 states and 276 transitions. [2024-06-27 18:01:13,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 658 transitions, 9745 flow [2024-06-27 18:01:17,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 658 transitions, 9399 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:01:17,970 INFO L231 Difference]: Finished difference. Result has 493 places, 621 transitions, 7971 flow [2024-06-27 18:01:17,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7773, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7971, PETRI_PLACES=493, PETRI_TRANSITIONS=621} [2024-06-27 18:01:17,971 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 443 predicate places. [2024-06-27 18:01:17,971 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 621 transitions, 7971 flow [2024-06-27 18:01:17,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:17,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:17,971 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 18:01:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 18:01:17,972 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:17,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1333058512, now seen corresponding path program 21 times [2024-06-27 18:01:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:17,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347785123] [2024-06-27 18:01:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:17,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:18,073 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 18:01:18,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:18,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347785123] [2024-06-27 18:01:18,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347785123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:18,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:18,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:18,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406950532] [2024-06-27 18:01:18,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:18,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:18,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:18,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:01:18,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 621 transitions, 7971 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:18,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:18,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:01:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:20,468 INFO L124 PetriNetUnfolderBase]: 5131/8714 cut-off events. [2024-06-27 18:01:20,468 INFO L125 PetriNetUnfolderBase]: For 629560/629682 co-relation queries the response was YES. [2024-06-27 18:01:20,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54416 conditions, 8714 events. 5131/8714 cut-off events. For 629560/629682 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 65167 event pairs, 932 based on Foata normal form. 123/8779 useless extension candidates. Maximal degree in co-relation 54219. Up to 7292 conditions per place. [2024-06-27 18:01:20,599 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 541 selfloop transitions, 95 changer transitions 0/651 dead transitions. [2024-06-27 18:01:20,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 651 transitions, 9323 flow [2024-06-27 18:01:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:01:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:01:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 18:01:20,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 18:01:20,600 INFO L175 Difference]: Start difference. First operand has 493 places, 621 transitions, 7971 flow. Second operand 8 states and 227 transitions. [2024-06-27 18:01:20,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 651 transitions, 9323 flow [2024-06-27 18:01:27,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 651 transitions, 9066 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 18:01:27,015 INFO L231 Difference]: Finished difference. Result has 493 places, 621 transitions, 7910 flow [2024-06-27 18:01:27,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7714, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7910, PETRI_PLACES=493, PETRI_TRANSITIONS=621} [2024-06-27 18:01:27,016 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 443 predicate places. [2024-06-27 18:01:27,017 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 621 transitions, 7910 flow [2024-06-27 18:01:27,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:27,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:27,017 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 18:01:27,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 18:01:27,017 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:27,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1567210908, now seen corresponding path program 22 times [2024-06-27 18:01:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:27,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183716877] [2024-06-27 18:01:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:27,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:27,122 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 18:01:27,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:27,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183716877] [2024-06-27 18:01:27,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183716877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:27,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:27,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:27,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528970896] [2024-06-27 18:01:27,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:27,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:27,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:27,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:01:27,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 621 transitions, 7910 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:27,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:27,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:01:27,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:29,712 INFO L124 PetriNetUnfolderBase]: 5181/8714 cut-off events. [2024-06-27 18:01:29,713 INFO L125 PetriNetUnfolderBase]: For 651408/651536 co-relation queries the response was YES. [2024-06-27 18:01:29,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55004 conditions, 8714 events. 5181/8714 cut-off events. For 651408/651536 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 64643 event pairs, 876 based on Foata normal form. 129/8798 useless extension candidates. Maximal degree in co-relation 54806. Up to 7278 conditions per place. [2024-06-27 18:01:29,846 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 523 selfloop transitions, 130 changer transitions 0/668 dead transitions. [2024-06-27 18:01:29,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 668 transitions, 9978 flow [2024-06-27 18:01:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:01:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:01:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-06-27 18:01:29,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021739130434782 [2024-06-27 18:01:29,847 INFO L175 Difference]: Start difference. First operand has 493 places, 621 transitions, 7910 flow. Second operand 10 states and 277 transitions. [2024-06-27 18:01:29,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 668 transitions, 9978 flow [2024-06-27 18:01:36,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 668 transitions, 9800 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:01:36,769 INFO L231 Difference]: Finished difference. Result has 499 places, 633 transitions, 8208 flow [2024-06-27 18:01:36,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8208, PETRI_PLACES=499, PETRI_TRANSITIONS=633} [2024-06-27 18:01:36,774 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 449 predicate places. [2024-06-27 18:01:36,774 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 633 transitions, 8208 flow [2024-06-27 18:01:36,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:36,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:36,774 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 18:01:36,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 18:01:36,775 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:36,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1310710398, now seen corresponding path program 23 times [2024-06-27 18:01:36,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:36,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051855335] [2024-06-27 18:01:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:36,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:36,878 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 18:01:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051855335] [2024-06-27 18:01:36,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051855335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:36,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:36,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101468731] [2024-06-27 18:01:36,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:36,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:36,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:36,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:01:36,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 633 transitions, 8208 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:36,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:36,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:01:36,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:39,572 INFO L124 PetriNetUnfolderBase]: 5178/8927 cut-off events. [2024-06-27 18:01:39,572 INFO L125 PetriNetUnfolderBase]: For 658061/658183 co-relation queries the response was YES. [2024-06-27 18:01:39,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55409 conditions, 8927 events. 5178/8927 cut-off events. For 658061/658183 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 67690 event pairs, 1049 based on Foata normal form. 123/8994 useless extension candidates. Maximal degree in co-relation 55208. Up to 7275 conditions per place. [2024-06-27 18:01:39,716 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 517 selfloop transitions, 129 changer transitions 0/661 dead transitions. [2024-06-27 18:01:39,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 661 transitions, 9822 flow [2024-06-27 18:01:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:01:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:01:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 18:01:39,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 18:01:39,718 INFO L175 Difference]: Start difference. First operand has 499 places, 633 transitions, 8208 flow. Second operand 8 states and 225 transitions. [2024-06-27 18:01:39,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 661 transitions, 9822 flow [2024-06-27 18:01:45,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 661 transitions, 9572 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 18:01:45,861 INFO L231 Difference]: Finished difference. Result has 503 places, 633 transitions, 8222 flow [2024-06-27 18:01:45,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7958, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8222, PETRI_PLACES=503, PETRI_TRANSITIONS=633} [2024-06-27 18:01:45,862 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 453 predicate places. [2024-06-27 18:01:45,862 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 633 transitions, 8222 flow [2024-06-27 18:01:45,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:45,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:45,863 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 18:01:45,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 18:01:45,863 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:45,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:45,863 INFO L85 PathProgramCache]: Analyzing trace with hash 391844540, now seen corresponding path program 16 times [2024-06-27 18:01:45,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:45,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809656336] [2024-06-27 18:01:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:45,963 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 18:01:45,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:45,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809656336] [2024-06-27 18:01:45,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809656336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:45,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:45,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:45,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14388301] [2024-06-27 18:01:45,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:45,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:45,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:45,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:46,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:01:46,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 633 transitions, 8222 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:46,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:46,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:01:46,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:48,659 INFO L124 PetriNetUnfolderBase]: 5189/8692 cut-off events. [2024-06-27 18:01:48,659 INFO L125 PetriNetUnfolderBase]: For 663220/663352 co-relation queries the response was YES. [2024-06-27 18:01:48,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55259 conditions, 8692 events. 5189/8692 cut-off events. For 663220/663352 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 64227 event pairs, 948 based on Foata normal form. 133/8773 useless extension candidates. Maximal degree in co-relation 55057. Up to 7597 conditions per place. [2024-06-27 18:01:48,807 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 617 selfloop transitions, 31 changer transitions 0/663 dead transitions. [2024-06-27 18:01:48,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 663 transitions, 9638 flow [2024-06-27 18:01:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:01:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:01:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 18:01:48,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-06-27 18:01:48,809 INFO L175 Difference]: Start difference. First operand has 503 places, 633 transitions, 8222 flow. Second operand 8 states and 218 transitions. [2024-06-27 18:01:48,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 663 transitions, 9638 flow [2024-06-27 18:01:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 663 transitions, 9366 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:01:54,774 INFO L231 Difference]: Finished difference. Result has 503 places, 636 transitions, 8072 flow [2024-06-27 18:01:54,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7950, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8072, PETRI_PLACES=503, PETRI_TRANSITIONS=636} [2024-06-27 18:01:54,775 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 453 predicate places. [2024-06-27 18:01:54,776 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 636 transitions, 8072 flow [2024-06-27 18:01:54,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:54,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:54,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:54,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 18:01:54,776 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:54,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -36252130, now seen corresponding path program 17 times [2024-06-27 18:01:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:54,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618287638] [2024-06-27 18:01:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:54,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:54,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618287638] [2024-06-27 18:01:54,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618287638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:54,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828275229] [2024-06-27 18:01:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:54,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:54,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:54,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:01:54,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 636 transitions, 8072 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:54,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:54,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:01:54,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:57,422 INFO L124 PetriNetUnfolderBase]: 5214/8761 cut-off events. [2024-06-27 18:01:57,422 INFO L125 PetriNetUnfolderBase]: For 680966/681094 co-relation queries the response was YES. [2024-06-27 18:01:57,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55364 conditions, 8761 events. 5214/8761 cut-off events. For 680966/681094 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 65046 event pairs, 908 based on Foata normal form. 129/8835 useless extension candidates. Maximal degree in co-relation 55161. Up to 7075 conditions per place. [2024-06-27 18:01:57,539 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 474 selfloop transitions, 182 changer transitions 0/671 dead transitions. [2024-06-27 18:01:57,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 671 transitions, 10072 flow [2024-06-27 18:01:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:01:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:01:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 18:01:57,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:01:57,540 INFO L175 Difference]: Start difference. First operand has 503 places, 636 transitions, 8072 flow. Second operand 8 states and 230 transitions. [2024-06-27 18:01:57,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 671 transitions, 10072 flow [2024-06-27 18:02:03,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 671 transitions, 9984 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 18:02:03,441 INFO L231 Difference]: Finished difference. Result has 505 places, 642 transitions, 8462 flow [2024-06-27 18:02:03,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8462, PETRI_PLACES=505, PETRI_TRANSITIONS=642} [2024-06-27 18:02:03,442 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 455 predicate places. [2024-06-27 18:02:03,442 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 642 transitions, 8462 flow [2024-06-27 18:02:03,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:03,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:03,443 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 18:02:03,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 18:02:03,443 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:02:03,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:03,443 INFO L85 PathProgramCache]: Analyzing trace with hash -36638080, now seen corresponding path program 18 times [2024-06-27 18:02:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:03,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004341644] [2024-06-27 18:02:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:03,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:03,552 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 18:02:03,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:03,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004341644] [2024-06-27 18:02:03,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004341644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:03,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:03,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:02:03,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165330477] [2024-06-27 18:02:03,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:03,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:03,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:03,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:02:03,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 642 transitions, 8462 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:03,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:03,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:02:03,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand