./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe013_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/safe013_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe013_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 17:51:18,324 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:51:18,355 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:51:18,357 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:51:18,358 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:51:18,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:51:18,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:51:18,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:51:18,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:51:18,372 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:51:18,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:51:18,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:51:18,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:51:18,373 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:51:18,373 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:51:18,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:51:18,374 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:51:18,374 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:51:18,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:51:18,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:51:18,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:51:18,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:51:18,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:51:18,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:51:18,376 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:51:18,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:51:18,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:51:18,377 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:51:18,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:51:18,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:51:18,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:51:18,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:51:18,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:51:18,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:51:18,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:51:18,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:51:18,379 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:51:18,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:51:18,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:51:18,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:51:18,380 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:51:18,380 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:51:18,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:51:18,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:51:18,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:51:18,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:51:18,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:51:18,565 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:51:18,565 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:51:18,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe013_tso.yml/witness.yml [2024-06-27 17:51:18,644 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:51:18,644 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:51:18,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-27 17:51:19,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:51:19,769 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:51:19,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-27 17:51:19,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5573109eb/6b8e470213414f1a8e00f9b1f94b831d/FLAG1fcb15ea1 [2024-06-27 17:51:19,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5573109eb/6b8e470213414f1a8e00f9b1f94b831d [2024-06-27 17:51:19,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:51:19,792 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:51:19,793 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:51:19,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:51:19,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:51:19,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:51:18" (1/2) ... [2024-06-27 17:51:19,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4053b973 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:51:19, skipping insertion in model container [2024-06-27 17:51:19,800 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:51:18" (1/2) ... [2024-06-27 17:51:19,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e05746b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:51:19, skipping insertion in model container [2024-06-27 17:51:19,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:51:19" (2/2) ... [2024-06-27 17:51:19,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4053b973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:19, skipping insertion in model container [2024-06-27 17:51:19,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:51:19" (2/2) ... [2024-06-27 17:51:19,802 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:51:19,847 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:51:19,848 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:51:19,848 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:51:19,848 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:51:19,848 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:51:19,849 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 17:51:19,886 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:51:20,028 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/safe013_tso.i[945,958] [2024-06-27 17:51:20,142 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:51:20,150 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:51:20,190 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/safe013_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:51:20,230 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:51:20,260 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:51:20,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20 WrapperNode [2024-06-27 17:51:20,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:51:20,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:51:20,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:51:20,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:51:20,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,290 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 17:51:20,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:51:20,291 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:51:20,291 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:51:20,291 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:51:20,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,302 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,315 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 17:51:20,315 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,328 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,332 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:51:20,333 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:51:20,333 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:51:20,333 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:51:20,334 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (1/1) ... [2024-06-27 17:51:20,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:51:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:51:20,368 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 17:51:20,369 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 17:51:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:51:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:51:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:51:20,442 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:51:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:51:20,442 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:51:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:51:20,442 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:51:20,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:51:20,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:51:20,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:51:20,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:51:20,445 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 17:51:20,576 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:51:20,579 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:51:20,765 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:51:20,765 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:51:20,821 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:51:20,821 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:51:20,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:51:20 BoogieIcfgContainer [2024-06-27 17:51:20,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:51:20,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:51:20,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:51:20,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:51:20,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:51:18" (1/4) ... [2024-06-27 17:51:20,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57152b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:51:20, skipping insertion in model container [2024-06-27 17:51:20,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:51:19" (2/4) ... [2024-06-27 17:51:20,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57152b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:51:20, skipping insertion in model container [2024-06-27 17:51:20,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:51:20" (3/4) ... [2024-06-27 17:51:20,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57152b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:51:20, skipping insertion in model container [2024-06-27 17:51:20,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:51:20" (4/4) ... [2024-06-27 17:51:20,827 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_tso.i [2024-06-27 17:51:20,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:51:20,849 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:51:20,849 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:51:20,883 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:51:20,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:51:20,926 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 17:51:20,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:51:20,929 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 17:51:20,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:51:20,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 17:51:20,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:51:20,943 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;@61cdf291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:51:20,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:51:20,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:51:20,946 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:51:20,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:51:20,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:20,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:51:20,947 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 17:51:20,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:20,954 INFO L85 PathProgramCache]: Analyzing trace with hash 209466946, now seen corresponding path program 1 times [2024-06-27 17:51:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745615020] [2024-06-27 17:51:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:21,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:21,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745615020] [2024-06-27 17:51:21,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745615020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:21,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:21,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:51:21,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683226426] [2024-06-27 17:51:21,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:21,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:51:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:51:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:51:21,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 17:51:21,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:21,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 17:51:21,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:21,482 INFO L124 PetriNetUnfolderBase]: 971/1604 cut-off events. [2024-06-27 17:51:21,483 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 17:51:21,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3124 conditions, 1604 events. 971/1604 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9004 event pairs, 542 based on Foata normal form. 1/1538 useless extension candidates. Maximal degree in co-relation 3112. Up to 1455 conditions per place. [2024-06-27 17:51:21,496 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 32 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-27 17:51:21,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 191 flow [2024-06-27 17:51:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:51:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:51:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-27 17:51:21,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2024-06-27 17:51:21,507 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 99 transitions. [2024-06-27 17:51:21,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 191 flow [2024-06-27 17:51:21,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 186 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:21,514 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-27 17:51:21,515 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 17:51:21,519 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 17:51:21,519 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-27 17:51:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:21,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:21,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:51:21,520 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 17:51:21,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash -564969073, now seen corresponding path program 1 times [2024-06-27 17:51:21,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:21,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726114405] [2024-06-27 17:51:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:21,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726114405] [2024-06-27 17:51:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726114405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:51:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259255282] [2024-06-27 17:51:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:21,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:51:21,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:51:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:51:21,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 17:51:21,712 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 17:51:21,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:21,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 17:51:21,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:21,884 INFO L124 PetriNetUnfolderBase]: 978/1637 cut-off events. [2024-06-27 17:51:21,885 INFO L125 PetriNetUnfolderBase]: For 299/307 co-relation queries the response was YES. [2024-06-27 17:51:21,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3601 conditions, 1637 events. 978/1637 cut-off events. For 299/307 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9234 event pairs, 492 based on Foata normal form. 7/1612 useless extension candidates. Maximal degree in co-relation 3589. Up to 1421 conditions per place. [2024-06-27 17:51:21,895 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 43 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-27 17:51:21,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 296 flow [2024-06-27 17:51:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:51:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:51:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-06-27 17:51:21,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7336956521739131 [2024-06-27 17:51:21,899 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 135 transitions. [2024-06-27 17:51:21,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 296 flow [2024-06-27 17:51:21,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:51:21,902 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 188 flow [2024-06-27 17:51:21,902 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-27 17:51:21,903 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-06-27 17:51:21,903 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 188 flow [2024-06-27 17:51:21,904 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 17:51:21,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:21,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:21,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:51:21,907 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 17:51:21,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash 88934826, now seen corresponding path program 1 times [2024-06-27 17:51:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:21,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971002629] [2024-06-27 17:51:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:22,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:22,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971002629] [2024-06-27 17:51:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971002629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:22,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:22,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:51:22,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371404802] [2024-06-27 17:51:22,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:51:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:51:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:51:22,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:22,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:22,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:22,196 INFO L124 PetriNetUnfolderBase]: 1255/2037 cut-off events. [2024-06-27 17:51:22,196 INFO L125 PetriNetUnfolderBase]: For 1258/1276 co-relation queries the response was YES. [2024-06-27 17:51:22,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5319 conditions, 2037 events. 1255/2037 cut-off events. For 1258/1276 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11442 event pairs, 616 based on Foata normal form. 8/2044 useless extension candidates. Maximal degree in co-relation 5304. Up to 1852 conditions per place. [2024-06-27 17:51:22,209 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 47 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-06-27 17:51:22,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 346 flow [2024-06-27 17:51:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:51:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:51:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-27 17:51:22,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 17:51:22,212 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 188 flow. Second operand 4 states and 124 transitions. [2024-06-27 17:51:22,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 346 flow [2024-06-27 17:51:22,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 342 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:51:22,218 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 226 flow [2024-06-27 17:51:22,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 17:51:22,220 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-06-27 17:51:22,220 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 226 flow [2024-06-27 17:51:22,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:22,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:22,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:51:22,221 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 17:51:22,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash 544407007, now seen corresponding path program 1 times [2024-06-27 17:51:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:22,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294662873] [2024-06-27 17:51:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:22,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294662873] [2024-06-27 17:51:22,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294662873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:22,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:22,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:22,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200070271] [2024-06-27 17:51:22,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:22,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:22,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:22,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:22,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 226 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 17:51:22,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:22,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:22,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:22,612 INFO L124 PetriNetUnfolderBase]: 1320/2159 cut-off events. [2024-06-27 17:51:22,613 INFO L125 PetriNetUnfolderBase]: For 2110/2134 co-relation queries the response was YES. [2024-06-27 17:51:22,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6068 conditions, 2159 events. 1320/2159 cut-off events. For 2110/2134 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12207 event pairs, 323 based on Foata normal form. 23/2178 useless extension candidates. Maximal degree in co-relation 6050. Up to 1759 conditions per place. [2024-06-27 17:51:22,625 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 66 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-27 17:51:22,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 520 flow [2024-06-27 17:51:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 17:51:22,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-27 17:51:22,627 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 226 flow. Second operand 6 states and 195 transitions. [2024-06-27 17:51:22,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 520 flow [2024-06-27 17:51:22,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 502 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:22,631 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 288 flow [2024-06-27 17:51:22,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-27 17:51:22,632 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-06-27 17:51:22,633 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 288 flow [2024-06-27 17:51:22,633 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 17:51:22,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:22,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:22,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:51:22,633 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 17:51:22,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:22,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1537986945, now seen corresponding path program 1 times [2024-06-27 17:51:22,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:22,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659280363] [2024-06-27 17:51:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:22,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:22,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:22,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659280363] [2024-06-27 17:51:22,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659280363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:22,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:22,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:51:22,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803134782] [2024-06-27 17:51:22,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:22,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:51:22,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:51:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:51:22,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:22,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:22,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:22,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:22,937 INFO L124 PetriNetUnfolderBase]: 1598/2571 cut-off events. [2024-06-27 17:51:22,937 INFO L125 PetriNetUnfolderBase]: For 3608/3608 co-relation queries the response was YES. [2024-06-27 17:51:22,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7782 conditions, 2571 events. 1598/2571 cut-off events. For 3608/3608 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14907 event pairs, 542 based on Foata normal form. 2/2570 useless extension candidates. Maximal degree in co-relation 7762. Up to 2333 conditions per place. [2024-06-27 17:51:22,953 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 65 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-06-27 17:51:22,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 534 flow [2024-06-27 17:51:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 17:51:22,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-06-27 17:51:22,955 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 288 flow. Second operand 5 states and 147 transitions. [2024-06-27 17:51:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 534 flow [2024-06-27 17:51:22,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 494 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:22,961 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 344 flow [2024-06-27 17:51:22,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 17:51:22,963 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-06-27 17:51:22,964 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 344 flow [2024-06-27 17:51:22,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:22,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:22,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:51:22,965 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 17:51:22,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1159975811, now seen corresponding path program 1 times [2024-06-27 17:51:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:22,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487579028] [2024-06-27 17:51:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:23,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:23,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487579028] [2024-06-27 17:51:23,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487579028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:23,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:23,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:51:23,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499103151] [2024-06-27 17:51:23,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:23,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:51:23,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:51:23,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:51:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:23,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 344 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 17:51:23,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:23,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:23,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:23,293 INFO L124 PetriNetUnfolderBase]: 1530/2493 cut-off events. [2024-06-27 17:51:23,294 INFO L125 PetriNetUnfolderBase]: For 4860/4904 co-relation queries the response was YES. [2024-06-27 17:51:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8018 conditions, 2493 events. 1530/2493 cut-off events. For 4860/4904 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14455 event pairs, 449 based on Foata normal form. 27/2500 useless extension candidates. Maximal degree in co-relation 7995. Up to 2103 conditions per place. [2024-06-27 17:51:23,310 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 66 selfloop transitions, 25 changer transitions 0/109 dead transitions. [2024-06-27 17:51:23,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 109 transitions, 698 flow [2024-06-27 17:51:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 17:51:23,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7086956521739131 [2024-06-27 17:51:23,312 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 344 flow. Second operand 5 states and 163 transitions. [2024-06-27 17:51:23,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 109 transitions, 698 flow [2024-06-27 17:51:23,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 692 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 17:51:23,317 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 496 flow [2024-06-27 17:51:23,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2024-06-27 17:51:23,318 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-06-27 17:51:23,318 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 496 flow [2024-06-27 17:51:23,318 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 17:51:23,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:23,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:23,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:51:23,319 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 17:51:23,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash -408832481, now seen corresponding path program 2 times [2024-06-27 17:51:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:23,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326247639] [2024-06-27 17:51:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:23,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:23,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:23,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326247639] [2024-06-27 17:51:23,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326247639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:23,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:23,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:51:23,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591104870] [2024-06-27 17:51:23,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:23,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:51:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:51:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:51:23,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:23,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 496 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 17:51:23,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:23,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:23,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:23,624 INFO L124 PetriNetUnfolderBase]: 1592/2642 cut-off events. [2024-06-27 17:51:23,624 INFO L125 PetriNetUnfolderBase]: For 7415/7443 co-relation queries the response was YES. [2024-06-27 17:51:23,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9445 conditions, 2642 events. 1592/2642 cut-off events. For 7415/7443 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15717 event pairs, 476 based on Foata normal form. 15/2641 useless extension candidates. Maximal degree in co-relation 9418. Up to 2186 conditions per place. [2024-06-27 17:51:23,674 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 64 selfloop transitions, 24 changer transitions 0/106 dead transitions. [2024-06-27 17:51:23,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 764 flow [2024-06-27 17:51:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 17:51:23,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2024-06-27 17:51:23,675 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 496 flow. Second operand 5 states and 158 transitions. [2024-06-27 17:51:23,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 764 flow [2024-06-27 17:51:23,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 736 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-27 17:51:23,685 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 552 flow [2024-06-27 17:51:23,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-27 17:51:23,686 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-06-27 17:51:23,686 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 552 flow [2024-06-27 17:51:23,687 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 17:51:23,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:23,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:23,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:51:23,687 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 17:51:23,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash -926186624, now seen corresponding path program 1 times [2024-06-27 17:51:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:23,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881792553] [2024-06-27 17:51:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:23,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:23,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881792553] [2024-06-27 17:51:23,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881792553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:23,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:23,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378360324] [2024-06-27 17:51:23,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:23,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:23,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:23,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:23,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 552 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 17:51:23,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:23,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:23,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:24,043 INFO L124 PetriNetUnfolderBase]: 1661/2701 cut-off events. [2024-06-27 17:51:24,043 INFO L125 PetriNetUnfolderBase]: For 7708/7708 co-relation queries the response was YES. [2024-06-27 17:51:24,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9637 conditions, 2701 events. 1661/2701 cut-off events. For 7708/7708 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15650 event pairs, 559 based on Foata normal form. 2/2692 useless extension candidates. Maximal degree in co-relation 9606. Up to 2341 conditions per place. [2024-06-27 17:51:24,056 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 94 selfloop transitions, 20 changer transitions 0/128 dead transitions. [2024-06-27 17:51:24,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 964 flow [2024-06-27 17:51:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:51:24,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:51:24,058 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 552 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:51:24,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 964 flow [2024-06-27 17:51:24,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 904 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:24,067 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 644 flow [2024-06-27 17:51:24,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=644, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-27 17:51:24,069 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-06-27 17:51:24,069 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 644 flow [2024-06-27 17:51:24,069 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 17:51:24,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:24,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:24,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:51:24,070 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 17:51:24,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash 211362632, now seen corresponding path program 2 times [2024-06-27 17:51:24,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:24,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556354920] [2024-06-27 17:51:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:24,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:24,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:24,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556354920] [2024-06-27 17:51:24,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556354920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:24,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:24,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:24,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046321771] [2024-06-27 17:51:24,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:24,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:24,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:24,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:24,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:24,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 644 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 17:51:24,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:24,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:24,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:24,461 INFO L124 PetriNetUnfolderBase]: 1678/2756 cut-off events. [2024-06-27 17:51:24,462 INFO L125 PetriNetUnfolderBase]: For 9120/9120 co-relation queries the response was YES. [2024-06-27 17:51:24,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 2756 events. 1678/2756 cut-off events. For 9120/9120 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16213 event pairs, 680 based on Foata normal form. 2/2739 useless extension candidates. Maximal degree in co-relation 10187. Up to 2359 conditions per place. [2024-06-27 17:51:24,480 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 90 selfloop transitions, 26 changer transitions 0/130 dead transitions. [2024-06-27 17:51:24,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1016 flow [2024-06-27 17:51:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:51:24,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:51:24,482 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 644 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:51:24,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1016 flow [2024-06-27 17:51:24,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 982 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:24,497 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 722 flow [2024-06-27 17:51:24,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=722, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-27 17:51:24,498 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2024-06-27 17:51:24,499 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 722 flow [2024-06-27 17:51:24,499 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 17:51:24,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:24,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:24,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:51:24,501 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 17:51:24,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:24,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1392857588, now seen corresponding path program 3 times [2024-06-27 17:51:24,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:24,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197515485] [2024-06-27 17:51:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:24,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197515485] [2024-06-27 17:51:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197515485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:24,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:24,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818116190] [2024-06-27 17:51:24,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:24,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:24,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:24,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:24,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:24,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 722 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 17:51:24,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:24,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:24,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:24,855 INFO L124 PetriNetUnfolderBase]: 1673/2774 cut-off events. [2024-06-27 17:51:24,856 INFO L125 PetriNetUnfolderBase]: For 10130/10130 co-relation queries the response was YES. [2024-06-27 17:51:24,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10380 conditions, 2774 events. 1673/2774 cut-off events. For 10130/10130 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16480 event pairs, 740 based on Foata normal form. 2/2750 useless extension candidates. Maximal degree in co-relation 10344. Up to 2354 conditions per place. [2024-06-27 17:51:24,872 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 89 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-27 17:51:24,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 128 transitions, 1014 flow [2024-06-27 17:51:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:51:24,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:51:24,873 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 722 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:51:24,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 128 transitions, 1014 flow [2024-06-27 17:51:24,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 128 transitions, 986 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 17:51:24,885 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 752 flow [2024-06-27 17:51:24,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=752, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-27 17:51:24,885 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-27 17:51:24,885 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 752 flow [2024-06-27 17:51:24,886 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 17:51:24,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:24,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:24,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:51:24,886 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 17:51:24,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash -536679458, now seen corresponding path program 1 times [2024-06-27 17:51:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:24,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633264779] [2024-06-27 17:51:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:24,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:24,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:24,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633264779] [2024-06-27 17:51:24,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633264779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:24,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:24,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:24,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673197896] [2024-06-27 17:51:24,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:24,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:24,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:24,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:24,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:24,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:24,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 752 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 17:51:25,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:25,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:25,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:25,247 INFO L124 PetriNetUnfolderBase]: 1665/2710 cut-off events. [2024-06-27 17:51:25,248 INFO L125 PetriNetUnfolderBase]: For 11481/11481 co-relation queries the response was YES. [2024-06-27 17:51:25,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10394 conditions, 2710 events. 1665/2710 cut-off events. For 11481/11481 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15754 event pairs, 478 based on Foata normal form. 4/2710 useless extension candidates. Maximal degree in co-relation 10356. Up to 2400 conditions per place. [2024-06-27 17:51:25,261 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 105 selfloop transitions, 12 changer transitions 0/131 dead transitions. [2024-06-27 17:51:25,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1068 flow [2024-06-27 17:51:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:51:25,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:51:25,263 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 752 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:51:25,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1068 flow [2024-06-27 17:51:25,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1018 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:25,276 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 753 flow [2024-06-27 17:51:25,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=753, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-27 17:51:25,276 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-06-27 17:51:25,276 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 753 flow [2024-06-27 17:51:25,277 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 17:51:25,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:25,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:51:25,277 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 17:51:25,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1961036800, now seen corresponding path program 1 times [2024-06-27 17:51:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463355018] [2024-06-27 17:51:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:25,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:25,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463355018] [2024-06-27 17:51:25,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463355018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:25,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:25,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842717534] [2024-06-27 17:51:25,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:25,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:25,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:25,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 753 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 17:51:25,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:25,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:25,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:25,621 INFO L124 PetriNetUnfolderBase]: 1586/2590 cut-off events. [2024-06-27 17:51:25,621 INFO L125 PetriNetUnfolderBase]: For 14307/14343 co-relation queries the response was YES. [2024-06-27 17:51:25,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10484 conditions, 2590 events. 1586/2590 cut-off events. For 14307/14343 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15218 event pairs, 394 based on Foata normal form. 30/2544 useless extension candidates. Maximal degree in co-relation 10445. Up to 2175 conditions per place. [2024-06-27 17:51:25,670 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 91 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-27 17:51:25,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 141 transitions, 1117 flow [2024-06-27 17:51:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-27 17:51:25,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:51:25,672 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 753 flow. Second operand 6 states and 192 transitions. [2024-06-27 17:51:25,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 141 transitions, 1117 flow [2024-06-27 17:51:25,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 141 transitions, 1084 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:25,687 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 815 flow [2024-06-27 17:51:25,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=815, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-27 17:51:25,688 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-27 17:51:25,688 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 815 flow [2024-06-27 17:51:25,688 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 17:51:25,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:25,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:25,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:51:25,689 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 17:51:25,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1954759516, now seen corresponding path program 2 times [2024-06-27 17:51:25,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:25,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817415731] [2024-06-27 17:51:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:25,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:25,767 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 17:51:25,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817415731] [2024-06-27 17:51:25,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817415731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:25,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:25,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:25,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929411736] [2024-06-27 17:51:25,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:25,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:25,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:25,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:25,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:25,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:25,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 815 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 17:51:25,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:25,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:25,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:26,013 INFO L124 PetriNetUnfolderBase]: 1679/2765 cut-off events. [2024-06-27 17:51:26,014 INFO L125 PetriNetUnfolderBase]: For 17598/17626 co-relation queries the response was YES. [2024-06-27 17:51:26,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11767 conditions, 2765 events. 1679/2765 cut-off events. For 17598/17626 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16567 event pairs, 409 based on Foata normal form. 25/2706 useless extension candidates. Maximal degree in co-relation 11727. Up to 2097 conditions per place. [2024-06-27 17:51:26,033 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 79 selfloop transitions, 47 changer transitions 0/151 dead transitions. [2024-06-27 17:51:26,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 1311 flow [2024-06-27 17:51:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 17:51:26,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-27 17:51:26,035 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 815 flow. Second operand 6 states and 195 transitions. [2024-06-27 17:51:26,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 1311 flow [2024-06-27 17:51:26,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 1246 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:26,052 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 956 flow [2024-06-27 17:51:26,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=956, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-27 17:51:26,053 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2024-06-27 17:51:26,053 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 956 flow [2024-06-27 17:51:26,054 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 17:51:26,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:26,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:26,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:51:26,054 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 17:51:26,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1519566408, now seen corresponding path program 3 times [2024-06-27 17:51:26,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:26,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498063241] [2024-06-27 17:51:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:26,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498063241] [2024-06-27 17:51:26,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498063241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:26,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:26,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042793583] [2024-06-27 17:51:26,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:26,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:26,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 956 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 17:51:26,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:26,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:26,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:26,413 INFO L124 PetriNetUnfolderBase]: 1673/2738 cut-off events. [2024-06-27 17:51:26,414 INFO L125 PetriNetUnfolderBase]: For 20370/20394 co-relation queries the response was YES. [2024-06-27 17:51:26,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12348 conditions, 2738 events. 1673/2738 cut-off events. For 20370/20394 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16362 event pairs, 424 based on Foata normal form. 19/2672 useless extension candidates. Maximal degree in co-relation 12307. Up to 2101 conditions per place. [2024-06-27 17:51:26,434 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 79 selfloop transitions, 43 changer transitions 0/147 dead transitions. [2024-06-27 17:51:26,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 147 transitions, 1320 flow [2024-06-27 17:51:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:51:26,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-27 17:51:26,436 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 956 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:51:26,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 147 transitions, 1320 flow [2024-06-27 17:51:26,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 147 transitions, 1263 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 17:51:26,462 INFO L231 Difference]: Finished difference. Result has 104 places, 118 transitions, 995 flow [2024-06-27 17:51:26,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=995, PETRI_PLACES=104, PETRI_TRANSITIONS=118} [2024-06-27 17:51:26,463 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-06-27 17:51:26,463 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 118 transitions, 995 flow [2024-06-27 17:51:26,463 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 17:51:26,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:26,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:26,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:51:26,464 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:26,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -186101112, now seen corresponding path program 1 times [2024-06-27 17:51:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:26,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591381949] [2024-06-27 17:51:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:26,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:26,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:26,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591381949] [2024-06-27 17:51:26,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591381949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:26,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:26,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:51:26,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015318920] [2024-06-27 17:51:26,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:26,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:51:26,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:26,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:51:26,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:51:26,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:26,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 995 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:26,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:26,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:26,808 INFO L124 PetriNetUnfolderBase]: 1640/2738 cut-off events. [2024-06-27 17:51:26,808 INFO L125 PetriNetUnfolderBase]: For 19417/19428 co-relation queries the response was YES. [2024-06-27 17:51:26,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11959 conditions, 2738 events. 1640/2738 cut-off events. For 19417/19428 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16521 event pairs, 652 based on Foata normal form. 12/2722 useless extension candidates. Maximal degree in co-relation 11915. Up to 2249 conditions per place. [2024-06-27 17:51:26,827 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 87 selfloop transitions, 18 changer transitions 0/131 dead transitions. [2024-06-27 17:51:26,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 131 transitions, 1239 flow [2024-06-27 17:51:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:51:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:51:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 17:51:26,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6684782608695652 [2024-06-27 17:51:26,828 INFO L175 Difference]: Start difference. First operand has 104 places, 118 transitions, 995 flow. Second operand 4 states and 123 transitions. [2024-06-27 17:51:26,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 131 transitions, 1239 flow [2024-06-27 17:51:26,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 131 transitions, 1149 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:26,850 INFO L231 Difference]: Finished difference. Result has 104 places, 118 transitions, 952 flow [2024-06-27 17:51:26,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=952, PETRI_PLACES=104, PETRI_TRANSITIONS=118} [2024-06-27 17:51:26,851 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-06-27 17:51:26,851 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 118 transitions, 952 flow [2024-06-27 17:51:26,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:26,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:26,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:51:26,852 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 17:51:26,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2010816755, now seen corresponding path program 1 times [2024-06-27 17:51:26,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:26,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863238880] [2024-06-27 17:51:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:26,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:26,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863238880] [2024-06-27 17:51:26,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863238880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:26,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:26,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358042274] [2024-06-27 17:51:26,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:26,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:26,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:26,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 952 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 17:51:26,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:26,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:26,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:27,261 INFO L124 PetriNetUnfolderBase]: 1740/2791 cut-off events. [2024-06-27 17:51:27,261 INFO L125 PetriNetUnfolderBase]: For 19905/19905 co-relation queries the response was YES. [2024-06-27 17:51:27,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12376 conditions, 2791 events. 1740/2791 cut-off events. For 19905/19905 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16048 event pairs, 433 based on Foata normal form. 2/2790 useless extension candidates. Maximal degree in co-relation 12331. Up to 2488 conditions per place. [2024-06-27 17:51:27,280 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 136 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-27 17:51:27,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 166 transitions, 1414 flow [2024-06-27 17:51:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:51:27,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:51:27,282 INFO L175 Difference]: Start difference. First operand has 104 places, 118 transitions, 952 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:51:27,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 166 transitions, 1414 flow [2024-06-27 17:51:27,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 166 transitions, 1364 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:27,304 INFO L231 Difference]: Finished difference. Result has 110 places, 127 transitions, 1028 flow [2024-06-27 17:51:27,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1028, PETRI_PLACES=110, PETRI_TRANSITIONS=127} [2024-06-27 17:51:27,304 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 60 predicate places. [2024-06-27 17:51:27,304 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 127 transitions, 1028 flow [2024-06-27 17:51:27,305 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 17:51:27,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:27,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:27,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:51:27,305 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 17:51:27,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:27,306 INFO L85 PathProgramCache]: Analyzing trace with hash 468210987, now seen corresponding path program 2 times [2024-06-27 17:51:27,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:27,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436760863] [2024-06-27 17:51:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:27,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:27,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436760863] [2024-06-27 17:51:27,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436760863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:27,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:27,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:27,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599566663] [2024-06-27 17:51:27,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:27,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:27,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:27,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:27,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 127 transitions, 1028 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 17:51:27,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:27,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:27,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:27,656 INFO L124 PetriNetUnfolderBase]: 1779/2870 cut-off events. [2024-06-27 17:51:27,656 INFO L125 PetriNetUnfolderBase]: For 22753/22753 co-relation queries the response was YES. [2024-06-27 17:51:27,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13189 conditions, 2870 events. 1779/2870 cut-off events. For 22753/22753 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16671 event pairs, 435 based on Foata normal form. 2/2866 useless extension candidates. Maximal degree in co-relation 13142. Up to 2369 conditions per place. [2024-06-27 17:51:27,674 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 125 selfloop transitions, 42 changer transitions 0/181 dead transitions. [2024-06-27 17:51:27,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 181 transitions, 1688 flow [2024-06-27 17:51:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 17:51:27,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6677018633540373 [2024-06-27 17:51:27,676 INFO L175 Difference]: Start difference. First operand has 110 places, 127 transitions, 1028 flow. Second operand 7 states and 215 transitions. [2024-06-27 17:51:27,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 181 transitions, 1688 flow [2024-06-27 17:51:27,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 181 transitions, 1642 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:27,704 INFO L231 Difference]: Finished difference. Result has 116 places, 140 transitions, 1216 flow [2024-06-27 17:51:27,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1216, PETRI_PLACES=116, PETRI_TRANSITIONS=140} [2024-06-27 17:51:27,704 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 66 predicate places. [2024-06-27 17:51:27,704 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 140 transitions, 1216 flow [2024-06-27 17:51:27,705 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 17:51:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:51:27,705 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 17:51:27,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 468003597, now seen corresponding path program 3 times [2024-06-27 17:51:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619700648] [2024-06-27 17:51:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619700648] [2024-06-27 17:51:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619700648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:27,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:27,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592321400] [2024-06-27 17:51:27,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:27,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:27,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:27,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 140 transitions, 1216 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 17:51:27,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:27,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:27,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:28,059 INFO L124 PetriNetUnfolderBase]: 1774/2947 cut-off events. [2024-06-27 17:51:28,059 INFO L125 PetriNetUnfolderBase]: For 25913/25913 co-relation queries the response was YES. [2024-06-27 17:51:28,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13974 conditions, 2947 events. 1774/2947 cut-off events. For 25913/25913 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17721 event pairs, 671 based on Foata normal form. 2/2923 useless extension candidates. Maximal degree in co-relation 13924. Up to 2364 conditions per place. [2024-06-27 17:51:28,079 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 124 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-27 17:51:28,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 179 transitions, 1707 flow [2024-06-27 17:51:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:51:28,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 17:51:28,081 INFO L175 Difference]: Start difference. First operand has 116 places, 140 transitions, 1216 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:51:28,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 179 transitions, 1707 flow [2024-06-27 17:51:28,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 179 transitions, 1665 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 17:51:28,114 INFO L231 Difference]: Finished difference. Result has 122 places, 140 transitions, 1264 flow [2024-06-27 17:51:28,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=122, PETRI_TRANSITIONS=140} [2024-06-27 17:51:28,114 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 72 predicate places. [2024-06-27 17:51:28,114 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 140 transitions, 1264 flow [2024-06-27 17:51:28,115 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 17:51:28,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:28,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:28,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:51:28,115 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 17:51:28,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash 810424327, now seen corresponding path program 1 times [2024-06-27 17:51:28,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:28,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678180410] [2024-06-27 17:51:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:28,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:28,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:28,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678180410] [2024-06-27 17:51:28,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678180410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:28,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:28,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:28,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225508511] [2024-06-27 17:51:28,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:28,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:28,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:28,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 140 transitions, 1264 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 17:51:28,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:28,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:28,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:28,530 INFO L124 PetriNetUnfolderBase]: 1801/2994 cut-off events. [2024-06-27 17:51:28,530 INFO L125 PetriNetUnfolderBase]: For 28408/28408 co-relation queries the response was YES. [2024-06-27 17:51:28,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14335 conditions, 2994 events. 1801/2994 cut-off events. For 28408/28408 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18061 event pairs, 683 based on Foata normal form. 4/2970 useless extension candidates. Maximal degree in co-relation 14283. Up to 2505 conditions per place. [2024-06-27 17:51:28,547 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 138 selfloop transitions, 27 changer transitions 0/179 dead transitions. [2024-06-27 17:51:28,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 179 transitions, 1696 flow [2024-06-27 17:51:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:51:28,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:51:28,549 INFO L175 Difference]: Start difference. First operand has 122 places, 140 transitions, 1264 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:51:28,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 179 transitions, 1696 flow [2024-06-27 17:51:28,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 179 transitions, 1600 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:28,586 INFO L231 Difference]: Finished difference. Result has 124 places, 142 transitions, 1247 flow [2024-06-27 17:51:28,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1247, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2024-06-27 17:51:28,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 74 predicate places. [2024-06-27 17:51:28,587 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 1247 flow [2024-06-27 17:51:28,587 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 17:51:28,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:28,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:51:28,588 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 17:51:28,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash 52730583, now seen corresponding path program 4 times [2024-06-27 17:51:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:28,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563497175] [2024-06-27 17:51:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:28,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:28,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:28,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563497175] [2024-06-27 17:51:28,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563497175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:28,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:28,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:28,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127627763] [2024-06-27 17:51:28,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:28,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:28,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:28,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:28,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:28,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 142 transitions, 1247 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 17:51:28,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:28,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:28,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:28,950 INFO L124 PetriNetUnfolderBase]: 1818/3025 cut-off events. [2024-06-27 17:51:28,950 INFO L125 PetriNetUnfolderBase]: For 30270/30270 co-relation queries the response was YES. [2024-06-27 17:51:28,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14678 conditions, 3025 events. 1818/3025 cut-off events. For 30270/30270 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18294 event pairs, 685 based on Foata normal form. 2/3001 useless extension candidates. Maximal degree in co-relation 14625. Up to 2423 conditions per place. [2024-06-27 17:51:28,968 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 120 selfloop transitions, 48 changer transitions 0/182 dead transitions. [2024-06-27 17:51:28,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 1790 flow [2024-06-27 17:51:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:51:28,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-27 17:51:28,970 INFO L175 Difference]: Start difference. First operand has 124 places, 142 transitions, 1247 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:51:28,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 1790 flow [2024-06-27 17:51:28,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 182 transitions, 1729 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:29,000 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1361 flow [2024-06-27 17:51:29,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1361, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-27 17:51:29,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 77 predicate places. [2024-06-27 17:51:29,000 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1361 flow [2024-06-27 17:51:29,001 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 17:51:29,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:29,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:29,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:51:29,001 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 17:51:29,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:29,001 INFO L85 PathProgramCache]: Analyzing trace with hash -618900321, now seen corresponding path program 5 times [2024-06-27 17:51:29,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:29,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048521658] [2024-06-27 17:51:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:29,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:29,081 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 17:51:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048521658] [2024-06-27 17:51:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048521658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:29,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:29,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:29,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603801127] [2024-06-27 17:51:29,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:29,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:29,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:29,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:29,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1361 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 17:51:29,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:29,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:29,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:29,391 INFO L124 PetriNetUnfolderBase]: 1835/3054 cut-off events. [2024-06-27 17:51:29,391 INFO L125 PetriNetUnfolderBase]: For 33117/33117 co-relation queries the response was YES. [2024-06-27 17:51:29,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15148 conditions, 3054 events. 1835/3054 cut-off events. For 33117/33117 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18486 event pairs, 691 based on Foata normal form. 2/3028 useless extension candidates. Maximal degree in co-relation 15093. Up to 2441 conditions per place. [2024-06-27 17:51:29,409 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 123 selfloop transitions, 48 changer transitions 0/185 dead transitions. [2024-06-27 17:51:29,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 185 transitions, 1904 flow [2024-06-27 17:51:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:51:29,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:51:29,420 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1361 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:51:29,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 185 transitions, 1904 flow [2024-06-27 17:51:29,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 185 transitions, 1822 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:29,458 INFO L231 Difference]: Finished difference. Result has 131 places, 150 transitions, 1424 flow [2024-06-27 17:51:29,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1424, PETRI_PLACES=131, PETRI_TRANSITIONS=150} [2024-06-27 17:51:29,459 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-06-27 17:51:29,459 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 150 transitions, 1424 flow [2024-06-27 17:51:29,459 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 17:51:29,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:29,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:29,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:51:29,460 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 17:51:29,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -619107711, now seen corresponding path program 6 times [2024-06-27 17:51:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:29,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132224900] [2024-06-27 17:51:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:29,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:29,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132224900] [2024-06-27 17:51:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132224900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:29,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:29,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:29,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974789364] [2024-06-27 17:51:29,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:29,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:29,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:29,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:29,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 150 transitions, 1424 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 17:51:29,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:29,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:29,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:29,815 INFO L124 PetriNetUnfolderBase]: 1830/2947 cut-off events. [2024-06-27 17:51:29,815 INFO L125 PetriNetUnfolderBase]: For 34318/34318 co-relation queries the response was YES. [2024-06-27 17:51:29,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15051 conditions, 2947 events. 1830/2947 cut-off events. For 34318/34318 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17208 event pairs, 439 based on Foata normal form. 2/2942 useless extension candidates. Maximal degree in co-relation 14995. Up to 2436 conditions per place. [2024-06-27 17:51:29,833 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 120 selfloop transitions, 49 changer transitions 0/183 dead transitions. [2024-06-27 17:51:29,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 1840 flow [2024-06-27 17:51:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:51:29,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:51:29,834 INFO L175 Difference]: Start difference. First operand has 131 places, 150 transitions, 1424 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:51:29,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 1840 flow [2024-06-27 17:51:29,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 183 transitions, 1674 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:29,876 INFO L231 Difference]: Finished difference. Result has 132 places, 150 transitions, 1364 flow [2024-06-27 17:51:29,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1364, PETRI_PLACES=132, PETRI_TRANSITIONS=150} [2024-06-27 17:51:29,876 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-06-27 17:51:29,877 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 150 transitions, 1364 flow [2024-06-27 17:51:29,877 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 17:51:29,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:29,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:29,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:51:29,877 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 17:51:29,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:29,878 INFO L85 PathProgramCache]: Analyzing trace with hash -618892385, now seen corresponding path program 2 times [2024-06-27 17:51:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:29,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137345064] [2024-06-27 17:51:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:29,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137345064] [2024-06-27 17:51:29,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137345064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:29,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:29,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582616368] [2024-06-27 17:51:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:29,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:29,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:29,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:29,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 150 transitions, 1364 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 17:51:29,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:29,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:29,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:30,284 INFO L124 PetriNetUnfolderBase]: 1857/3023 cut-off events. [2024-06-27 17:51:30,285 INFO L125 PetriNetUnfolderBase]: For 36882/36882 co-relation queries the response was YES. [2024-06-27 17:51:30,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15201 conditions, 3023 events. 1857/3023 cut-off events. For 36882/36882 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17892 event pairs, 620 based on Foata normal form. 4/3010 useless extension candidates. Maximal degree in co-relation 15145. Up to 2587 conditions per place. [2024-06-27 17:51:30,302 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 145 selfloop transitions, 27 changer transitions 0/186 dead transitions. [2024-06-27 17:51:30,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1806 flow [2024-06-27 17:51:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:51:30,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:51:30,304 INFO L175 Difference]: Start difference. First operand has 132 places, 150 transitions, 1364 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:51:30,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1806 flow [2024-06-27 17:51:30,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 186 transitions, 1710 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:30,342 INFO L231 Difference]: Finished difference. Result has 134 places, 152 transitions, 1351 flow [2024-06-27 17:51:30,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1351, PETRI_PLACES=134, PETRI_TRANSITIONS=152} [2024-06-27 17:51:30,343 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 84 predicate places. [2024-06-27 17:51:30,343 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 152 transitions, 1351 flow [2024-06-27 17:51:30,343 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 17:51:30,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:30,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:30,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:51:30,344 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 17:51:30,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1750179657, now seen corresponding path program 3 times [2024-06-27 17:51:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:30,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831880934] [2024-06-27 17:51:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:30,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:30,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831880934] [2024-06-27 17:51:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831880934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:30,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:30,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799434857] [2024-06-27 17:51:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:30,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:30,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:30,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 152 transitions, 1351 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 17:51:30,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:30,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:30,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:30,742 INFO L124 PetriNetUnfolderBase]: 1884/3044 cut-off events. [2024-06-27 17:51:30,742 INFO L125 PetriNetUnfolderBase]: For 39289/39289 co-relation queries the response was YES. [2024-06-27 17:51:30,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15548 conditions, 3044 events. 1884/3044 cut-off events. For 39289/39289 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17898 event pairs, 437 based on Foata normal form. 4/3043 useless extension candidates. Maximal degree in co-relation 15491. Up to 2628 conditions per place. [2024-06-27 17:51:30,757 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 146 selfloop transitions, 28 changer transitions 0/188 dead transitions. [2024-06-27 17:51:30,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 188 transitions, 1801 flow [2024-06-27 17:51:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:51:30,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 17:51:30,759 INFO L175 Difference]: Start difference. First operand has 134 places, 152 transitions, 1351 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:51:30,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 188 transitions, 1801 flow [2024-06-27 17:51:30,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 188 transitions, 1736 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:30,804 INFO L231 Difference]: Finished difference. Result has 136 places, 154 transitions, 1375 flow [2024-06-27 17:51:30,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1375, PETRI_PLACES=136, PETRI_TRANSITIONS=154} [2024-06-27 17:51:30,805 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-06-27 17:51:30,805 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 154 transitions, 1375 flow [2024-06-27 17:51:30,805 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 17:51:30,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:30,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:30,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:51:30,806 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 17:51:30,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash -352868675, now seen corresponding path program 4 times [2024-06-27 17:51:30,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:30,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139589067] [2024-06-27 17:51:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:30,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:30,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:30,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139589067] [2024-06-27 17:51:30,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139589067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:30,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:30,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827410379] [2024-06-27 17:51:30,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:30,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:30,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:30,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 154 transitions, 1375 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 17:51:30,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:30,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:30,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:31,204 INFO L124 PetriNetUnfolderBase]: 1876/3032 cut-off events. [2024-06-27 17:51:31,204 INFO L125 PetriNetUnfolderBase]: For 41135/41135 co-relation queries the response was YES. [2024-06-27 17:51:31,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15640 conditions, 3032 events. 1876/3032 cut-off events. For 41135/41135 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17876 event pairs, 388 based on Foata normal form. 4/3031 useless extension candidates. Maximal degree in co-relation 15582. Up to 2505 conditions per place. [2024-06-27 17:51:31,223 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 142 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-27 17:51:31,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 191 transitions, 1837 flow [2024-06-27 17:51:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:51:31,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:51:31,224 INFO L175 Difference]: Start difference. First operand has 136 places, 154 transitions, 1375 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:51:31,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 191 transitions, 1837 flow [2024-06-27 17:51:31,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 1766 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:31,273 INFO L231 Difference]: Finished difference. Result has 138 places, 156 transitions, 1411 flow [2024-06-27 17:51:31,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1411, PETRI_PLACES=138, PETRI_TRANSITIONS=156} [2024-06-27 17:51:31,274 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-06-27 17:51:31,274 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 156 transitions, 1411 flow [2024-06-27 17:51:31,274 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 17:51:31,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:31,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:31,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:51:31,275 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 17:51:31,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2086328891, now seen corresponding path program 1 times [2024-06-27 17:51:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:31,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669815856] [2024-06-27 17:51:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:31,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:31,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:31,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669815856] [2024-06-27 17:51:31,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669815856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:31,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:31,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:31,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098226512] [2024-06-27 17:51:31,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:31,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:31,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:31,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:31,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 156 transitions, 1411 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 17:51:31,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:31,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:31,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:31,808 INFO L124 PetriNetUnfolderBase]: 1992/3254 cut-off events. [2024-06-27 17:51:31,809 INFO L125 PetriNetUnfolderBase]: For 57271/57325 co-relation queries the response was YES. [2024-06-27 17:51:31,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17442 conditions, 3254 events. 1992/3254 cut-off events. For 57271/57325 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19634 event pairs, 308 based on Foata normal form. 22/3186 useless extension candidates. Maximal degree in co-relation 17383. Up to 2348 conditions per place. [2024-06-27 17:51:31,834 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 141 selfloop transitions, 35 changer transitions 0/215 dead transitions. [2024-06-27 17:51:31,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 215 transitions, 2077 flow [2024-06-27 17:51:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 256 transitions. [2024-06-27 17:51:31,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:51:31,839 INFO L175 Difference]: Start difference. First operand has 138 places, 156 transitions, 1411 flow. Second operand 8 states and 256 transitions. [2024-06-27 17:51:31,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 215 transitions, 2077 flow [2024-06-27 17:51:31,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 215 transitions, 1988 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:31,899 INFO L231 Difference]: Finished difference. Result has 141 places, 160 transitions, 1455 flow [2024-06-27 17:51:31,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1455, PETRI_PLACES=141, PETRI_TRANSITIONS=160} [2024-06-27 17:51:31,900 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-06-27 17:51:31,900 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 160 transitions, 1455 flow [2024-06-27 17:51:31,900 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 17:51:31,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:31,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:31,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:51:31,901 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 17:51:31,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:31,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1342275131, now seen corresponding path program 2 times [2024-06-27 17:51:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845916825] [2024-06-27 17:51:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:31,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:31,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845916825] [2024-06-27 17:51:31,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845916825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:31,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:31,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914262411] [2024-06-27 17:51:31,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:32,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:32,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 160 transitions, 1455 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 17:51:32,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:32,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:32,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:32,396 INFO L124 PetriNetUnfolderBase]: 2008/3424 cut-off events. [2024-06-27 17:51:32,396 INFO L125 PetriNetUnfolderBase]: For 59143/59190 co-relation queries the response was YES. [2024-06-27 17:51:32,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17750 conditions, 3424 events. 2008/3424 cut-off events. For 59143/59190 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21631 event pairs, 638 based on Foata normal form. 16/3342 useless extension candidates. Maximal degree in co-relation 17690. Up to 2653 conditions per place. [2024-06-27 17:51:32,418 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 133 selfloop transitions, 31 changer transitions 0/203 dead transitions. [2024-06-27 17:51:32,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 203 transitions, 1903 flow [2024-06-27 17:51:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-27 17:51:32,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6894409937888198 [2024-06-27 17:51:32,419 INFO L175 Difference]: Start difference. First operand has 141 places, 160 transitions, 1455 flow. Second operand 7 states and 222 transitions. [2024-06-27 17:51:32,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 203 transitions, 1903 flow [2024-06-27 17:51:32,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 203 transitions, 1847 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:32,475 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 1470 flow [2024-06-27 17:51:32,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1470, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2024-06-27 17:51:32,475 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 94 predicate places. [2024-06-27 17:51:32,476 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 1470 flow [2024-06-27 17:51:32,476 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 17:51:32,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:32,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:32,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:51:32,476 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:32,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1623205435, now seen corresponding path program 3 times [2024-06-27 17:51:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887182638] [2024-06-27 17:51:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:32,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:32,555 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 17:51:32,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:32,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887182638] [2024-06-27 17:51:32,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887182638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:32,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:32,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:32,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120698925] [2024-06-27 17:51:32,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:32,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:32,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:32,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:32,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 1470 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 17:51:32,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:32,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:32,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:32,954 INFO L124 PetriNetUnfolderBase]: 2075/3397 cut-off events. [2024-06-27 17:51:32,954 INFO L125 PetriNetUnfolderBase]: For 62836/62883 co-relation queries the response was YES. [2024-06-27 17:51:32,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18302 conditions, 3397 events. 2075/3397 cut-off events. For 62836/62883 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20822 event pairs, 403 based on Foata normal form. 14/3308 useless extension candidates. Maximal degree in co-relation 18240. Up to 2550 conditions per place. [2024-06-27 17:51:32,977 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 107 selfloop transitions, 57 changer transitions 0/203 dead transitions. [2024-06-27 17:51:32,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 203 transitions, 1996 flow [2024-06-27 17:51:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-27 17:51:32,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:51:32,978 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 1470 flow. Second operand 7 states and 224 transitions. [2024-06-27 17:51:32,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 203 transitions, 1996 flow [2024-06-27 17:51:33,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 203 transitions, 1927 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:33,044 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1558 flow [2024-06-27 17:51:33,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1558, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-27 17:51:33,045 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2024-06-27 17:51:33,045 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1558 flow [2024-06-27 17:51:33,045 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 17:51:33,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:33,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:33,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:51:33,046 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 17:51:33,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash 914624221, now seen corresponding path program 4 times [2024-06-27 17:51:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131278446] [2024-06-27 17:51:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:33,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:33,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131278446] [2024-06-27 17:51:33,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131278446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:33,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:33,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124929508] [2024-06-27 17:51:33,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:33,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:33,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:33,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:33,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:33,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1558 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 17:51:33,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:33,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:33,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:33,520 INFO L124 PetriNetUnfolderBase]: 2150/3614 cut-off events. [2024-06-27 17:51:33,521 INFO L125 PetriNetUnfolderBase]: For 67164/67211 co-relation queries the response was YES. [2024-06-27 17:51:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19394 conditions, 3614 events. 2150/3614 cut-off events. For 67164/67211 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22837 event pairs, 492 based on Foata normal form. 14/3530 useless extension candidates. Maximal degree in co-relation 19331. Up to 2665 conditions per place. [2024-06-27 17:51:33,545 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 110 selfloop transitions, 53 changer transitions 0/202 dead transitions. [2024-06-27 17:51:33,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 202 transitions, 2080 flow [2024-06-27 17:51:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-27 17:51:33,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6801242236024845 [2024-06-27 17:51:33,546 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1558 flow. Second operand 7 states and 219 transitions. [2024-06-27 17:51:33,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 202 transitions, 2080 flow [2024-06-27 17:51:33,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 202 transitions, 1957 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:33,603 INFO L231 Difference]: Finished difference. Result has 147 places, 164 transitions, 1588 flow [2024-06-27 17:51:33,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1588, PETRI_PLACES=147, PETRI_TRANSITIONS=164} [2024-06-27 17:51:33,604 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-06-27 17:51:33,604 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 164 transitions, 1588 flow [2024-06-27 17:51:33,605 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 17:51:33,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:33,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:33,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:51:33,605 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 17:51:33,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:33,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1860460029, now seen corresponding path program 1 times [2024-06-27 17:51:33,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:33,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487181886] [2024-06-27 17:51:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:33,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:33,669 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 17:51:33,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:33,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487181886] [2024-06-27 17:51:33,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487181886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:33,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:33,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:33,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915711091] [2024-06-27 17:51:33,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:33,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:33,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:33,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:33,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:33,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 164 transitions, 1588 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 17:51:33,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:33,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:33,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:33,995 INFO L124 PetriNetUnfolderBase]: 2275/3705 cut-off events. [2024-06-27 17:51:33,996 INFO L125 PetriNetUnfolderBase]: For 59167/59167 co-relation queries the response was YES. [2024-06-27 17:51:34,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19815 conditions, 3705 events. 2275/3705 cut-off events. For 59167/59167 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22811 event pairs, 497 based on Foata normal form. 1/3704 useless extension candidates. Maximal degree in co-relation 19751. Up to 3292 conditions per place. [2024-06-27 17:51:34,021 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 161 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-06-27 17:51:34,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 195 transitions, 2158 flow [2024-06-27 17:51:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:51:34,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:51:34,022 INFO L175 Difference]: Start difference. First operand has 147 places, 164 transitions, 1588 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:51:34,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 195 transitions, 2158 flow [2024-06-27 17:51:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 195 transitions, 2039 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:34,097 INFO L231 Difference]: Finished difference. Result has 148 places, 170 transitions, 1613 flow [2024-06-27 17:51:34,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1613, PETRI_PLACES=148, PETRI_TRANSITIONS=170} [2024-06-27 17:51:34,098 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 98 predicate places. [2024-06-27 17:51:34,098 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 170 transitions, 1613 flow [2024-06-27 17:51:34,098 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 17:51:34,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:34,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:34,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:51:34,098 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 17:51:34,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1860339873, now seen corresponding path program 1 times [2024-06-27 17:51:34,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:34,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194334255] [2024-06-27 17:51:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:34,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194334255] [2024-06-27 17:51:34,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194334255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:34,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:34,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:34,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519996123] [2024-06-27 17:51:34,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:34,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:34,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:34,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:34,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 170 transitions, 1613 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 17:51:34,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:34,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:34,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:34,574 INFO L124 PetriNetUnfolderBase]: 2341/3879 cut-off events. [2024-06-27 17:51:34,574 INFO L125 PetriNetUnfolderBase]: For 62671/62671 co-relation queries the response was YES. [2024-06-27 17:51:34,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20212 conditions, 3879 events. 2341/3879 cut-off events. For 62671/62671 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24393 event pairs, 549 based on Foata normal form. 2/3870 useless extension candidates. Maximal degree in co-relation 20147. Up to 3230 conditions per place. [2024-06-27 17:51:34,599 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 150 selfloop transitions, 42 changer transitions 0/206 dead transitions. [2024-06-27 17:51:34,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 206 transitions, 2243 flow [2024-06-27 17:51:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:51:34,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:51:34,600 INFO L175 Difference]: Start difference. First operand has 148 places, 170 transitions, 1613 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:51:34,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 206 transitions, 2243 flow [2024-06-27 17:51:34,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 206 transitions, 2177 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:34,674 INFO L231 Difference]: Finished difference. Result has 153 places, 183 transitions, 1783 flow [2024-06-27 17:51:34,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1783, PETRI_PLACES=153, PETRI_TRANSITIONS=183} [2024-06-27 17:51:34,674 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-06-27 17:51:34,674 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 183 transitions, 1783 flow [2024-06-27 17:51:34,675 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 17:51:34,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:34,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:51:34,676 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 17:51:34,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1860340059, now seen corresponding path program 2 times [2024-06-27 17:51:34,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:34,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505081401] [2024-06-27 17:51:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:34,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505081401] [2024-06-27 17:51:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505081401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:34,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:34,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701878558] [2024-06-27 17:51:34,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:34,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:34,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:34,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:34,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:34,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 183 transitions, 1783 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 17:51:34,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:34,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:34,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:35,139 INFO L124 PetriNetUnfolderBase]: 2352/3773 cut-off events. [2024-06-27 17:51:35,139 INFO L125 PetriNetUnfolderBase]: For 64252/64252 co-relation queries the response was YES. [2024-06-27 17:51:35,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20515 conditions, 3773 events. 2352/3773 cut-off events. For 64252/64252 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22990 event pairs, 453 based on Foata normal form. 1/3773 useless extension candidates. Maximal degree in co-relation 20447. Up to 3415 conditions per place. [2024-06-27 17:51:35,166 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 176 selfloop transitions, 18 changer transitions 0/208 dead transitions. [2024-06-27 17:51:35,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 208 transitions, 2275 flow [2024-06-27 17:51:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 17:51:35,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-06-27 17:51:35,167 INFO L175 Difference]: Start difference. First operand has 153 places, 183 transitions, 1783 flow. Second operand 6 states and 169 transitions. [2024-06-27 17:51:35,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 208 transitions, 2275 flow [2024-06-27 17:51:35,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 208 transitions, 2218 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:35,249 INFO L231 Difference]: Finished difference. Result has 157 places, 187 transitions, 1830 flow [2024-06-27 17:51:35,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1830, PETRI_PLACES=157, PETRI_TRANSITIONS=187} [2024-06-27 17:51:35,250 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 17:51:35,250 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 187 transitions, 1830 flow [2024-06-27 17:51:35,250 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 17:51:35,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:35,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:35,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:51:35,250 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 17:51:35,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1497229787, now seen corresponding path program 2 times [2024-06-27 17:51:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:35,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295257277] [2024-06-27 17:51:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:35,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:35,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295257277] [2024-06-27 17:51:35,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295257277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:35,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:35,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:35,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613032853] [2024-06-27 17:51:35,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:35,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:35,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:35,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:35,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:35,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 187 transitions, 1830 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 17:51:35,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:35,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:35,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:35,708 INFO L124 PetriNetUnfolderBase]: 2374/3851 cut-off events. [2024-06-27 17:51:35,708 INFO L125 PetriNetUnfolderBase]: For 69577/69580 co-relation queries the response was YES. [2024-06-27 17:51:35,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20680 conditions, 3851 events. 2374/3851 cut-off events. For 69577/69580 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23876 event pairs, 513 based on Foata normal form. 4/3841 useless extension candidates. Maximal degree in co-relation 20611. Up to 3265 conditions per place. [2024-06-27 17:51:35,733 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 147 selfloop transitions, 46 changer transitions 0/207 dead transitions. [2024-06-27 17:51:35,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 207 transitions, 2362 flow [2024-06-27 17:51:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 17:51:35,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-06-27 17:51:35,735 INFO L175 Difference]: Start difference. First operand has 157 places, 187 transitions, 1830 flow. Second operand 5 states and 148 transitions. [2024-06-27 17:51:35,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 207 transitions, 2362 flow [2024-06-27 17:51:35,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 207 transitions, 2296 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:35,817 INFO L231 Difference]: Finished difference. Result has 159 places, 191 transitions, 1909 flow [2024-06-27 17:51:35,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1909, PETRI_PLACES=159, PETRI_TRANSITIONS=191} [2024-06-27 17:51:35,818 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2024-06-27 17:51:35,818 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 191 transitions, 1909 flow [2024-06-27 17:51:35,818 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 17:51:35,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:35,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:35,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:51:35,818 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 17:51:35,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1496992637, now seen corresponding path program 3 times [2024-06-27 17:51:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:35,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506947561] [2024-06-27 17:51:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:35,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:35,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506947561] [2024-06-27 17:51:35,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506947561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:35,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:35,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:35,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250441299] [2024-06-27 17:51:35,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:35,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:35,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 191 transitions, 1909 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 17:51:35,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:35,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:36,238 INFO L124 PetriNetUnfolderBase]: 2354/3782 cut-off events. [2024-06-27 17:51:36,238 INFO L125 PetriNetUnfolderBase]: For 70027/70027 co-relation queries the response was YES. [2024-06-27 17:51:36,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20654 conditions, 3782 events. 2354/3782 cut-off events. For 70027/70027 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23113 event pairs, 472 based on Foata normal form. 2/3777 useless extension candidates. Maximal degree in co-relation 20584. Up to 3236 conditions per place. [2024-06-27 17:51:36,267 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 149 selfloop transitions, 46 changer transitions 0/209 dead transitions. [2024-06-27 17:51:36,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 209 transitions, 2341 flow [2024-06-27 17:51:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:51:36,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:51:36,268 INFO L175 Difference]: Start difference. First operand has 159 places, 191 transitions, 1909 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:51:36,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 209 transitions, 2341 flow [2024-06-27 17:51:36,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2227 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:36,347 INFO L231 Difference]: Finished difference. Result has 161 places, 191 transitions, 1903 flow [2024-06-27 17:51:36,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1903, PETRI_PLACES=161, PETRI_TRANSITIONS=191} [2024-06-27 17:51:36,348 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-06-27 17:51:36,348 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 191 transitions, 1903 flow [2024-06-27 17:51:36,348 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 17:51:36,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:36,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:51:36,348 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 17:51:36,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1496992451, now seen corresponding path program 3 times [2024-06-27 17:51:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362835374] [2024-06-27 17:51:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:36,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362835374] [2024-06-27 17:51:36,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362835374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:36,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:36,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100086600] [2024-06-27 17:51:36,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:36,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:36,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:36,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:36,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 191 transitions, 1903 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 17:51:36,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:36,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:36,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:36,808 INFO L124 PetriNetUnfolderBase]: 2351/3881 cut-off events. [2024-06-27 17:51:36,808 INFO L125 PetriNetUnfolderBase]: For 72071/72071 co-relation queries the response was YES. [2024-06-27 17:51:36,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20821 conditions, 3881 events. 2351/3881 cut-off events. For 72071/72071 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24384 event pairs, 843 based on Foata normal form. 1/3854 useless extension candidates. Maximal degree in co-relation 20751. Up to 3389 conditions per place. [2024-06-27 17:51:36,837 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 175 selfloop transitions, 23 changer transitions 0/212 dead transitions. [2024-06-27 17:51:36,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 212 transitions, 2349 flow [2024-06-27 17:51:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:51:36,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-06-27 17:51:36,838 INFO L175 Difference]: Start difference. First operand has 161 places, 191 transitions, 1903 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:51:36,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 212 transitions, 2349 flow [2024-06-27 17:51:36,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 212 transitions, 2215 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:36,932 INFO L231 Difference]: Finished difference. Result has 162 places, 191 transitions, 1829 flow [2024-06-27 17:51:36,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1829, PETRI_PLACES=162, PETRI_TRANSITIONS=191} [2024-06-27 17:51:36,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 112 predicate places. [2024-06-27 17:51:36,932 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 191 transitions, 1829 flow [2024-06-27 17:51:36,933 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 17:51:36,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:36,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:36,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:51:36,933 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:36,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1497238715, now seen corresponding path program 1 times [2024-06-27 17:51:36,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:36,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987656317] [2024-06-27 17:51:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:37,005 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 17:51:37,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:37,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987656317] [2024-06-27 17:51:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987656317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:37,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:37,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:37,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721824802] [2024-06-27 17:51:37,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:37,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:37,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:37,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:51:37,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 191 transitions, 1829 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 17:51:37,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:37,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:51:37,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:37,409 INFO L124 PetriNetUnfolderBase]: 2318/3757 cut-off events. [2024-06-27 17:51:37,409 INFO L125 PetriNetUnfolderBase]: For 75705/75725 co-relation queries the response was YES. [2024-06-27 17:51:37,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20207 conditions, 3757 events. 2318/3757 cut-off events. For 75705/75725 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23336 event pairs, 478 based on Foata normal form. 32/3778 useless extension candidates. Maximal degree in co-relation 20136. Up to 3086 conditions per place. [2024-06-27 17:51:37,433 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 156 selfloop transitions, 22 changer transitions 0/212 dead transitions. [2024-06-27 17:51:37,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2269 flow [2024-06-27 17:51:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 17:51:37,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-06-27 17:51:37,434 INFO L175 Difference]: Start difference. First operand has 162 places, 191 transitions, 1829 flow. Second operand 5 states and 151 transitions. [2024-06-27 17:51:37,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2269 flow [2024-06-27 17:51:37,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 212 transitions, 2221 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:37,539 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 1860 flow [2024-06-27 17:51:37,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1860, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2024-06-27 17:51:37,540 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 113 predicate places. [2024-06-27 17:51:37,540 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 1860 flow [2024-06-27 17:51:37,540 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 17:51:37,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:37,540 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 17:51:37,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:51:37,540 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 17:51:37,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2085954546, now seen corresponding path program 1 times [2024-06-27 17:51:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:37,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447514185] [2024-06-27 17:51:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:37,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:37,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:37,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447514185] [2024-06-27 17:51:37,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447514185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:37,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:37,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511882769] [2024-06-27 17:51:37,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:37,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:37,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:37,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:37,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 1860 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 17:51:37,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:37,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:37,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:38,109 INFO L124 PetriNetUnfolderBase]: 2617/4247 cut-off events. [2024-06-27 17:51:38,109 INFO L125 PetriNetUnfolderBase]: For 85863/85863 co-relation queries the response was YES. [2024-06-27 17:51:38,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23028 conditions, 4247 events. 2617/4247 cut-off events. For 85863/85863 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26475 event pairs, 435 based on Foata normal form. 12/4255 useless extension candidates. Maximal degree in co-relation 22956. Up to 3426 conditions per place. [2024-06-27 17:51:38,141 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 226 selfloop transitions, 20 changer transitions 0/260 dead transitions. [2024-06-27 17:51:38,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 260 transitions, 2726 flow [2024-06-27 17:51:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-06-27 17:51:38,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497584541062802 [2024-06-27 17:51:38,142 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 1860 flow. Second operand 9 states and 269 transitions. [2024-06-27 17:51:38,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 260 transitions, 2726 flow [2024-06-27 17:51:38,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 260 transitions, 2669 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:38,259 INFO L231 Difference]: Finished difference. Result has 171 places, 198 transitions, 1931 flow [2024-06-27 17:51:38,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1931, PETRI_PLACES=171, PETRI_TRANSITIONS=198} [2024-06-27 17:51:38,259 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 121 predicate places. [2024-06-27 17:51:38,259 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 198 transitions, 1931 flow [2024-06-27 17:51:38,260 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 17:51:38,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:38,260 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 17:51:38,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:51:38,260 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 17:51:38,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1339143154, now seen corresponding path program 2 times [2024-06-27 17:51:38,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:38,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368815315] [2024-06-27 17:51:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:38,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:38,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368815315] [2024-06-27 17:51:38,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368815315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:38,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:38,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:38,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683804040] [2024-06-27 17:51:38,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:38,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:38,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:38,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:38,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 198 transitions, 1931 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 17:51:38,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:38,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:38,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:38,908 INFO L124 PetriNetUnfolderBase]: 2684/4302 cut-off events. [2024-06-27 17:51:38,908 INFO L125 PetriNetUnfolderBase]: For 90489/90489 co-relation queries the response was YES. [2024-06-27 17:51:38,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23764 conditions, 4302 events. 2684/4302 cut-off events. For 90489/90489 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26764 event pairs, 473 based on Foata normal form. 12/4311 useless extension candidates. Maximal degree in co-relation 23689. Up to 3620 conditions per place. [2024-06-27 17:51:38,940 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 223 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2024-06-27 17:51:38,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 255 transitions, 2746 flow [2024-06-27 17:51:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 17:51:38,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-06-27 17:51:38,941 INFO L175 Difference]: Start difference. First operand has 171 places, 198 transitions, 1931 flow. Second operand 8 states and 241 transitions. [2024-06-27 17:51:38,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 255 transitions, 2746 flow [2024-06-27 17:51:39,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 255 transitions, 2698 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:39,087 INFO L231 Difference]: Finished difference. Result has 176 places, 201 transitions, 1983 flow [2024-06-27 17:51:39,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1983, PETRI_PLACES=176, PETRI_TRANSITIONS=201} [2024-06-27 17:51:39,088 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 126 predicate places. [2024-06-27 17:51:39,088 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 201 transitions, 1983 flow [2024-06-27 17:51:39,088 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 17:51:39,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:39,088 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 17:51:39,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:51:39,088 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 17:51:39,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1102883464, now seen corresponding path program 3 times [2024-06-27 17:51:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:39,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771224073] [2024-06-27 17:51:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:39,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:39,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771224073] [2024-06-27 17:51:39,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771224073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:39,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:39,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:39,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862581713] [2024-06-27 17:51:39,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:39,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:39,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:39,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:39,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 201 transitions, 1983 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 17:51:39,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:39,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:39,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:39,703 INFO L124 PetriNetUnfolderBase]: 2656/4258 cut-off events. [2024-06-27 17:51:39,703 INFO L125 PetriNetUnfolderBase]: For 89054/89054 co-relation queries the response was YES. [2024-06-27 17:51:39,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23204 conditions, 4258 events. 2656/4258 cut-off events. For 89054/89054 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26458 event pairs, 482 based on Foata normal form. 16/4271 useless extension candidates. Maximal degree in co-relation 23126. Up to 3737 conditions per place. [2024-06-27 17:51:39,792 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 220 selfloop transitions, 17 changer transitions 0/251 dead transitions. [2024-06-27 17:51:39,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 2615 flow [2024-06-27 17:51:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:51:39,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:51:39,794 INFO L175 Difference]: Start difference. First operand has 176 places, 201 transitions, 1983 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:51:39,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 2615 flow [2024-06-27 17:51:39,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 251 transitions, 2555 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:39,944 INFO L231 Difference]: Finished difference. Result has 180 places, 202 transitions, 1988 flow [2024-06-27 17:51:39,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1988, PETRI_PLACES=180, PETRI_TRANSITIONS=202} [2024-06-27 17:51:39,944 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-27 17:51:39,944 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 202 transitions, 1988 flow [2024-06-27 17:51:39,945 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 17:51:39,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:39,945 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 17:51:39,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:51:39,945 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 17:51:39,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1117567396, now seen corresponding path program 4 times [2024-06-27 17:51:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:39,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870822855] [2024-06-27 17:51:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:40,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870822855] [2024-06-27 17:51:40,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870822855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:40,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:40,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:40,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547584074] [2024-06-27 17:51:40,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:40,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:40,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:40,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:40,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:40,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 202 transitions, 1988 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 17:51:40,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:40,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:40,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:40,535 INFO L124 PetriNetUnfolderBase]: 2750/4590 cut-off events. [2024-06-27 17:51:40,536 INFO L125 PetriNetUnfolderBase]: For 93890/93890 co-relation queries the response was YES. [2024-06-27 17:51:40,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23968 conditions, 4590 events. 2750/4590 cut-off events. For 93890/93890 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 30017 event pairs, 934 based on Foata normal form. 16/4563 useless extension candidates. Maximal degree in co-relation 23888. Up to 3705 conditions per place. [2024-06-27 17:51:40,571 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 185 selfloop transitions, 50 changer transitions 0/249 dead transitions. [2024-06-27 17:51:40,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 249 transitions, 2604 flow [2024-06-27 17:51:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 17:51:40,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:51:40,572 INFO L175 Difference]: Start difference. First operand has 180 places, 202 transitions, 1988 flow. Second operand 8 states and 240 transitions. [2024-06-27 17:51:40,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 249 transitions, 2604 flow [2024-06-27 17:51:40,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 249 transitions, 2573 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:40,731 INFO L231 Difference]: Finished difference. Result has 182 places, 203 transitions, 2084 flow [2024-06-27 17:51:40,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2084, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2024-06-27 17:51:40,732 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 132 predicate places. [2024-06-27 17:51:40,732 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 2084 flow [2024-06-27 17:51:40,732 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 17:51:40,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:40,732 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 17:51:40,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:51:40,732 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 17:51:40,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1221644146, now seen corresponding path program 5 times [2024-06-27 17:51:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:40,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725743911] [2024-06-27 17:51:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:40,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:40,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:40,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725743911] [2024-06-27 17:51:40,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725743911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:40,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:40,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:40,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980959616] [2024-06-27 17:51:40,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:40,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:40,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:40,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 2084 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 17:51:40,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:40,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:40,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:41,370 INFO L124 PetriNetUnfolderBase]: 2844/4709 cut-off events. [2024-06-27 17:51:41,370 INFO L125 PetriNetUnfolderBase]: For 100104/100104 co-relation queries the response was YES. [2024-06-27 17:51:41,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25068 conditions, 4709 events. 2844/4709 cut-off events. For 100104/100104 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30522 event pairs, 682 based on Foata normal form. 16/4716 useless extension candidates. Maximal degree in co-relation 24987. Up to 3855 conditions per place. [2024-06-27 17:51:41,408 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 187 selfloop transitions, 49 changer transitions 0/250 dead transitions. [2024-06-27 17:51:41,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 250 transitions, 2704 flow [2024-06-27 17:51:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 17:51:41,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-06-27 17:51:41,409 INFO L175 Difference]: Start difference. First operand has 182 places, 203 transitions, 2084 flow. Second operand 8 states and 241 transitions. [2024-06-27 17:51:41,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 250 transitions, 2704 flow [2024-06-27 17:51:41,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 250 transitions, 2595 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:41,590 INFO L231 Difference]: Finished difference. Result has 184 places, 204 transitions, 2102 flow [2024-06-27 17:51:41,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2102, PETRI_PLACES=184, PETRI_TRANSITIONS=204} [2024-06-27 17:51:41,591 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 134 predicate places. [2024-06-27 17:51:41,591 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 204 transitions, 2102 flow [2024-06-27 17:51:41,591 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 17:51:41,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:41,591 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 17:51:41,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:51:41,591 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 17:51:41,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash -773909926, now seen corresponding path program 6 times [2024-06-27 17:51:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:41,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214199954] [2024-06-27 17:51:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:41,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:41,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214199954] [2024-06-27 17:51:41,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214199954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:41,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:41,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74737144] [2024-06-27 17:51:41,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:41,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:41,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:41,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:41,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 204 transitions, 2102 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 17:51:41,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:41,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:41,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:42,251 INFO L124 PetriNetUnfolderBase]: 2911/4845 cut-off events. [2024-06-27 17:51:42,252 INFO L125 PetriNetUnfolderBase]: For 102565/102565 co-relation queries the response was YES. [2024-06-27 17:51:42,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25637 conditions, 4845 events. 2911/4845 cut-off events. For 102565/102565 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 32018 event pairs, 927 based on Foata normal form. 12/4817 useless extension candidates. Maximal degree in co-relation 25555. Up to 3707 conditions per place. [2024-06-27 17:51:42,292 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 190 selfloop transitions, 52 changer transitions 0/256 dead transitions. [2024-06-27 17:51:42,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 256 transitions, 2784 flow [2024-06-27 17:51:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 17:51:42,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603260869565217 [2024-06-27 17:51:42,293 INFO L175 Difference]: Start difference. First operand has 184 places, 204 transitions, 2102 flow. Second operand 8 states and 243 transitions. [2024-06-27 17:51:42,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 256 transitions, 2784 flow [2024-06-27 17:51:42,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 256 transitions, 2675 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:42,477 INFO L231 Difference]: Finished difference. Result has 187 places, 207 transitions, 2170 flow [2024-06-27 17:51:42,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2170, PETRI_PLACES=187, PETRI_TRANSITIONS=207} [2024-06-27 17:51:42,478 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 137 predicate places. [2024-06-27 17:51:42,478 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 207 transitions, 2170 flow [2024-06-27 17:51:42,478 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 17:51:42,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:42,478 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 17:51:42,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:51:42,479 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 17:51:42,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1428714598, now seen corresponding path program 1 times [2024-06-27 17:51:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:42,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033447962] [2024-06-27 17:51:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:42,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:42,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033447962] [2024-06-27 17:51:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033447962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:42,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:42,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:42,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377405378] [2024-06-27 17:51:42,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:42,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:42,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:42,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:42,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:42,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 207 transitions, 2170 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 17:51:42,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:42,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:42,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:43,111 INFO L124 PetriNetUnfolderBase]: 2978/4828 cut-off events. [2024-06-27 17:51:43,112 INFO L125 PetriNetUnfolderBase]: For 107822/107822 co-relation queries the response was YES. [2024-06-27 17:51:43,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26234 conditions, 4828 events. 2978/4828 cut-off events. For 107822/107822 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31169 event pairs, 546 based on Foata normal form. 12/4834 useless extension candidates. Maximal degree in co-relation 26150. Up to 3684 conditions per place. [2024-06-27 17:51:43,152 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 189 selfloop transitions, 54 changer transitions 0/257 dead transitions. [2024-06-27 17:51:43,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 257 transitions, 2824 flow [2024-06-27 17:51:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-27 17:51:43,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:51:43,154 INFO L175 Difference]: Start difference. First operand has 187 places, 207 transitions, 2170 flow. Second operand 8 states and 242 transitions. [2024-06-27 17:51:43,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 257 transitions, 2824 flow [2024-06-27 17:51:43,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 257 transitions, 2740 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:43,384 INFO L231 Difference]: Finished difference. Result has 191 places, 208 transitions, 2226 flow [2024-06-27 17:51:43,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2226, PETRI_PLACES=191, PETRI_TRANSITIONS=208} [2024-06-27 17:51:43,385 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 141 predicate places. [2024-06-27 17:51:43,385 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 208 transitions, 2226 flow [2024-06-27 17:51:43,385 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 17:51:43,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:43,385 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 17:51:43,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:51:43,385 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 17:51:43,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash 171884422, now seen corresponding path program 7 times [2024-06-27 17:51:43,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:43,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583072488] [2024-06-27 17:51:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:43,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:43,466 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 17:51:43,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:43,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583072488] [2024-06-27 17:51:43,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583072488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:43,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:43,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:43,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704661225] [2024-06-27 17:51:43,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:43,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:43,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:43,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:43,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:43,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:43,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 208 transitions, 2226 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 17:51:43,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:43,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:43,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:44,066 INFO L124 PetriNetUnfolderBase]: 3072/4966 cut-off events. [2024-06-27 17:51:44,066 INFO L125 PetriNetUnfolderBase]: For 116488/116488 co-relation queries the response was YES. [2024-06-27 17:51:44,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27348 conditions, 4966 events. 3072/4966 cut-off events. For 116488/116488 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32269 event pairs, 595 based on Foata normal form. 16/4975 useless extension candidates. Maximal degree in co-relation 27262. Up to 4223 conditions per place. [2024-06-27 17:51:44,104 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 186 selfloop transitions, 52 changer transitions 0/252 dead transitions. [2024-06-27 17:51:44,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 252 transitions, 2848 flow [2024-06-27 17:51:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:51:44,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:51:44,105 INFO L175 Difference]: Start difference. First operand has 191 places, 208 transitions, 2226 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:51:44,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 252 transitions, 2848 flow [2024-06-27 17:51:44,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 252 transitions, 2722 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:44,308 INFO L231 Difference]: Finished difference. Result has 193 places, 209 transitions, 2239 flow [2024-06-27 17:51:44,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2239, PETRI_PLACES=193, PETRI_TRANSITIONS=209} [2024-06-27 17:51:44,308 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 143 predicate places. [2024-06-27 17:51:44,308 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 209 transitions, 2239 flow [2024-06-27 17:51:44,309 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 17:51:44,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:44,309 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 17:51:44,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:51:44,309 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 17:51:44,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2057702722, now seen corresponding path program 8 times [2024-06-27 17:51:44,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:44,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852818295] [2024-06-27 17:51:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:44,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:44,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:44,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852818295] [2024-06-27 17:51:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852818295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:44,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:44,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890132762] [2024-06-27 17:51:44,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:44,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:44,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:44,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:44,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 209 transitions, 2239 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 17:51:44,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:44,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:44,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:45,008 INFO L124 PetriNetUnfolderBase]: 3166/5316 cut-off events. [2024-06-27 17:51:45,008 INFO L125 PetriNetUnfolderBase]: For 124450/124450 co-relation queries the response was YES. [2024-06-27 17:51:45,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28281 conditions, 5316 events. 3166/5316 cut-off events. For 124450/124450 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 36205 event pairs, 1085 based on Foata normal form. 16/5279 useless extension candidates. Maximal degree in co-relation 28194. Up to 4373 conditions per place. [2024-06-27 17:51:45,053 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 190 selfloop transitions, 49 changer transitions 0/253 dead transitions. [2024-06-27 17:51:45,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 253 transitions, 2865 flow [2024-06-27 17:51:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:51:45,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 17:51:45,058 INFO L175 Difference]: Start difference. First operand has 193 places, 209 transitions, 2239 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:51:45,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 253 transitions, 2865 flow [2024-06-27 17:51:45,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 253 transitions, 2744 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:45,403 INFO L231 Difference]: Finished difference. Result has 195 places, 210 transitions, 2253 flow [2024-06-27 17:51:45,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2253, PETRI_PLACES=195, PETRI_TRANSITIONS=210} [2024-06-27 17:51:45,404 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-06-27 17:51:45,404 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 210 transitions, 2253 flow [2024-06-27 17:51:45,404 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 17:51:45,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:45,404 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 17:51:45,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:51:45,404 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 17:51:45,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2037962784, now seen corresponding path program 9 times [2024-06-27 17:51:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:45,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061810552] [2024-06-27 17:51:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:45,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061810552] [2024-06-27 17:51:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061810552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:45,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:45,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:45,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051599309] [2024-06-27 17:51:45,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:45,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:45,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:45,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:45,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 210 transitions, 2253 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 17:51:45,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:45,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:45,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:46,073 INFO L124 PetriNetUnfolderBase]: 3260/5280 cut-off events. [2024-06-27 17:51:46,073 INFO L125 PetriNetUnfolderBase]: For 129168/129168 co-relation queries the response was YES. [2024-06-27 17:51:46,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28851 conditions, 5280 events. 3260/5280 cut-off events. For 129168/129168 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34800 event pairs, 630 based on Foata normal form. 16/5289 useless extension candidates. Maximal degree in co-relation 28763. Up to 4523 conditions per place. [2024-06-27 17:51:46,120 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 190 selfloop transitions, 50 changer transitions 0/254 dead transitions. [2024-06-27 17:51:46,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 254 transitions, 2883 flow [2024-06-27 17:51:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:51:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:51:46,121 INFO L175 Difference]: Start difference. First operand has 195 places, 210 transitions, 2253 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:51:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 254 transitions, 2883 flow [2024-06-27 17:51:46,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 254 transitions, 2766 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:46,376 INFO L231 Difference]: Finished difference. Result has 197 places, 211 transitions, 2275 flow [2024-06-27 17:51:46,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2275, PETRI_PLACES=197, PETRI_TRANSITIONS=211} [2024-06-27 17:51:46,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 147 predicate places. [2024-06-27 17:51:46,376 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 211 transitions, 2275 flow [2024-06-27 17:51:46,376 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 17:51:46,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:46,376 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 17:51:46,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:51:46,377 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 17:51:46,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:46,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2037814914, now seen corresponding path program 10 times [2024-06-27 17:51:46,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:46,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144875490] [2024-06-27 17:51:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:46,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:46,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144875490] [2024-06-27 17:51:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144875490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:46,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:46,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433136564] [2024-06-27 17:51:46,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:46,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:46,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:46,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 211 transitions, 2275 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 17:51:46,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:46,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:46,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:47,258 INFO L124 PetriNetUnfolderBase]: 3292/5508 cut-off events. [2024-06-27 17:51:47,259 INFO L125 PetriNetUnfolderBase]: For 128146/128146 co-relation queries the response was YES. [2024-06-27 17:51:47,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29017 conditions, 5508 events. 3292/5508 cut-off events. For 128146/128146 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 37655 event pairs, 1073 based on Foata normal form. 12/5471 useless extension candidates. Maximal degree in co-relation 28928. Up to 4190 conditions per place. [2024-06-27 17:51:47,310 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 192 selfloop transitions, 54 changer transitions 0/260 dead transitions. [2024-06-27 17:51:47,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 260 transitions, 2977 flow [2024-06-27 17:51:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:51:47,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-27 17:51:47,312 INFO L175 Difference]: Start difference. First operand has 197 places, 211 transitions, 2275 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:51:47,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 260 transitions, 2977 flow [2024-06-27 17:51:47,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 260 transitions, 2856 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:47,579 INFO L231 Difference]: Finished difference. Result has 200 places, 214 transitions, 2358 flow [2024-06-27 17:51:47,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2358, PETRI_PLACES=200, PETRI_TRANSITIONS=214} [2024-06-27 17:51:47,579 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-06-27 17:51:47,580 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 214 transitions, 2358 flow [2024-06-27 17:51:47,580 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 17:51:47,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:47,580 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 17:51:47,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:51:47,580 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 17:51:47,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash -366223972, now seen corresponding path program 2 times [2024-06-27 17:51:47,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:47,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888811370] [2024-06-27 17:51:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:47,669 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 17:51:47,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:47,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888811370] [2024-06-27 17:51:47,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888811370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:47,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:47,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:47,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233084847] [2024-06-27 17:51:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:47,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:47,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 214 transitions, 2358 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 17:51:47,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:47,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:47,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:48,351 INFO L124 PetriNetUnfolderBase]: 3359/5487 cut-off events. [2024-06-27 17:51:48,351 INFO L125 PetriNetUnfolderBase]: For 133687/133687 co-relation queries the response was YES. [2024-06-27 17:51:48,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29612 conditions, 5487 events. 3359/5487 cut-off events. For 133687/133687 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36654 event pairs, 876 based on Foata normal form. 12/5482 useless extension candidates. Maximal degree in co-relation 29521. Up to 4563 conditions per place. [2024-06-27 17:51:48,400 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 193 selfloop transitions, 54 changer transitions 0/261 dead transitions. [2024-06-27 17:51:48,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 261 transitions, 3022 flow [2024-06-27 17:51:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:51:48,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-27 17:51:48,401 INFO L175 Difference]: Start difference. First operand has 200 places, 214 transitions, 2358 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:51:48,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 261 transitions, 3022 flow [2024-06-27 17:51:48,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 261 transitions, 2918 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:48,753 INFO L231 Difference]: Finished difference. Result has 204 places, 215 transitions, 2404 flow [2024-06-27 17:51:48,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2404, PETRI_PLACES=204, PETRI_TRANSITIONS=215} [2024-06-27 17:51:48,754 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2024-06-27 17:51:48,754 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 215 transitions, 2404 flow [2024-06-27 17:51:48,754 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 17:51:48,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:48,754 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 17:51:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:51:48,755 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 17:51:48,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2043540366, now seen corresponding path program 3 times [2024-06-27 17:51:48,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:48,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997149348] [2024-06-27 17:51:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:48,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:48,835 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 17:51:48,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:48,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997149348] [2024-06-27 17:51:48,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997149348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:48,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:48,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:48,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130705759] [2024-06-27 17:51:48,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:48,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:48,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 215 transitions, 2404 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 17:51:48,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:48,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:48,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:49,547 INFO L124 PetriNetUnfolderBase]: 3426/5770 cut-off events. [2024-06-27 17:51:49,547 INFO L125 PetriNetUnfolderBase]: For 139440/139440 co-relation queries the response was YES. [2024-06-27 17:51:49,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30549 conditions, 5770 events. 3426/5770 cut-off events. For 139440/139440 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40039 event pairs, 1145 based on Foata normal form. 12/5731 useless extension candidates. Maximal degree in co-relation 30456. Up to 4540 conditions per place. [2024-06-27 17:51:49,595 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 196 selfloop transitions, 52 changer transitions 0/262 dead transitions. [2024-06-27 17:51:49,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 262 transitions, 3072 flow [2024-06-27 17:51:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 17:51:49,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:51:49,596 INFO L175 Difference]: Start difference. First operand has 204 places, 215 transitions, 2404 flow. Second operand 8 states and 240 transitions. [2024-06-27 17:51:49,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 262 transitions, 3072 flow [2024-06-27 17:51:49,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 262 transitions, 2936 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:49,937 INFO L231 Difference]: Finished difference. Result has 206 places, 216 transitions, 2416 flow [2024-06-27 17:51:49,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2416, PETRI_PLACES=206, PETRI_TRANSITIONS=216} [2024-06-27 17:51:49,938 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 156 predicate places. [2024-06-27 17:51:49,938 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 216 transitions, 2416 flow [2024-06-27 17:51:49,938 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 17:51:49,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:49,939 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 17:51:49,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:51:49,939 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:49,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1142652120, now seen corresponding path program 4 times [2024-06-27 17:51:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443849611] [2024-06-27 17:51:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:50,023 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 17:51:50,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:50,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443849611] [2024-06-27 17:51:50,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443849611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:50,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:50,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:50,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359663933] [2024-06-27 17:51:50,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:50,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:50,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 216 transitions, 2416 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 17:51:50,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:50,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:50,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:50,694 INFO L124 PetriNetUnfolderBase]: 3406/5650 cut-off events. [2024-06-27 17:51:50,694 INFO L125 PetriNetUnfolderBase]: For 129935/129935 co-relation queries the response was YES. [2024-06-27 17:51:50,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29555 conditions, 5650 events. 3406/5650 cut-off events. For 129935/129935 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38522 event pairs, 958 based on Foata normal form. 12/5623 useless extension candidates. Maximal degree in co-relation 29461. Up to 3572 conditions per place. [2024-06-27 17:51:50,743 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 182 selfloop transitions, 66 changer transitions 0/262 dead transitions. [2024-06-27 17:51:50,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 2966 flow [2024-06-27 17:51:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:51:50,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 17:51:50,744 INFO L175 Difference]: Start difference. First operand has 206 places, 216 transitions, 2416 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:51:50,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 2966 flow [2024-06-27 17:51:51,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 262 transitions, 2832 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:51,107 INFO L231 Difference]: Finished difference. Result has 207 places, 215 transitions, 2334 flow [2024-06-27 17:51:51,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=207, PETRI_TRANSITIONS=215} [2024-06-27 17:51:51,108 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 157 predicate places. [2024-06-27 17:51:51,108 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 215 transitions, 2334 flow [2024-06-27 17:51:51,108 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 17:51:51,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:51,108 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 17:51:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:51:51,109 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 17:51:51,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1540493958, now seen corresponding path program 1 times [2024-06-27 17:51:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:51,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483769498] [2024-06-27 17:51:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483769498] [2024-06-27 17:51:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483769498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:51,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278916538] [2024-06-27 17:51:51,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:51,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:51,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:51,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:51,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 215 transitions, 2334 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 17:51:51,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:51,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:51,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:51,810 INFO L124 PetriNetUnfolderBase]: 3458/5895 cut-off events. [2024-06-27 17:51:51,811 INFO L125 PetriNetUnfolderBase]: For 125627/125627 co-relation queries the response was YES. [2024-06-27 17:51:51,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30292 conditions, 5895 events. 3458/5895 cut-off events. For 125627/125627 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41170 event pairs, 824 based on Foata normal form. 2/5883 useless extension candidates. Maximal degree in co-relation 30197. Up to 4790 conditions per place. [2024-06-27 17:51:51,862 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 179 selfloop transitions, 64 changer transitions 0/257 dead transitions. [2024-06-27 17:51:51,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 257 transitions, 3270 flow [2024-06-27 17:51:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:51:51,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:51:51,863 INFO L175 Difference]: Start difference. First operand has 207 places, 215 transitions, 2334 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:51:51,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 257 transitions, 3270 flow [2024-06-27 17:51:52,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 257 transitions, 3015 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 17:51:52,217 INFO L231 Difference]: Finished difference. Result has 206 places, 226 transitions, 2386 flow [2024-06-27 17:51:52,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=206, PETRI_TRANSITIONS=226} [2024-06-27 17:51:52,218 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 156 predicate places. [2024-06-27 17:51:52,218 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 226 transitions, 2386 flow [2024-06-27 17:51:52,218 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 17:51:52,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:52,219 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 17:51:52,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:51:52,219 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 17:51:52,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1835965690, now seen corresponding path program 2 times [2024-06-27 17:51:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248648862] [2024-06-27 17:51:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:52,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:52,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248648862] [2024-06-27 17:51:52,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248648862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:52,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:52,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824829581] [2024-06-27 17:51:52,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:52,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:52,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:52,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 226 transitions, 2386 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 17:51:52,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:52,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:52,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:52,953 INFO L124 PetriNetUnfolderBase]: 3524/5762 cut-off events. [2024-06-27 17:51:52,953 INFO L125 PetriNetUnfolderBase]: For 131348/131348 co-relation queries the response was YES. [2024-06-27 17:51:52,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30259 conditions, 5762 events. 3524/5762 cut-off events. For 131348/131348 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39073 event pairs, 674 based on Foata normal form. 2/5757 useless extension candidates. Maximal degree in co-relation 30165. Up to 5019 conditions per place. [2024-06-27 17:51:53,006 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 195 selfloop transitions, 51 changer transitions 0/260 dead transitions. [2024-06-27 17:51:53,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 260 transitions, 3182 flow [2024-06-27 17:51:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:51:53,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 17:51:53,008 INFO L175 Difference]: Start difference. First operand has 206 places, 226 transitions, 2386 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:51:53,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 260 transitions, 3182 flow [2024-06-27 17:51:53,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 260 transitions, 3067 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:53,375 INFO L231 Difference]: Finished difference. Result has 212 places, 234 transitions, 2532 flow [2024-06-27 17:51:53,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2532, PETRI_PLACES=212, PETRI_TRANSITIONS=234} [2024-06-27 17:51:53,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 162 predicate places. [2024-06-27 17:51:53,376 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 234 transitions, 2532 flow [2024-06-27 17:51:53,376 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 17:51:53,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:53,376 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 17:51:53,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:51:53,376 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 17:51:53,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1835960110, now seen corresponding path program 3 times [2024-06-27 17:51:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:53,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645576097] [2024-06-27 17:51:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:53,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645576097] [2024-06-27 17:51:53,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645576097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:53,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:53,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:53,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979190060] [2024-06-27 17:51:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:53,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:53,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:53,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:53,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 234 transitions, 2532 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 17:51:53,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:53,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:53,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:54,112 INFO L124 PetriNetUnfolderBase]: 3532/5777 cut-off events. [2024-06-27 17:51:54,112 INFO L125 PetriNetUnfolderBase]: For 135830/135830 co-relation queries the response was YES. [2024-06-27 17:51:54,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 5777 events. 3532/5777 cut-off events. For 135830/135830 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39210 event pairs, 674 based on Foata normal form. 2/5772 useless extension candidates. Maximal degree in co-relation 30596. Up to 5029 conditions per place. [2024-06-27 17:51:54,163 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 196 selfloop transitions, 59 changer transitions 0/269 dead transitions. [2024-06-27 17:51:54,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 269 transitions, 3281 flow [2024-06-27 17:51:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-06-27 17:51:54,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:51:54,164 INFO L175 Difference]: Start difference. First operand has 212 places, 234 transitions, 2532 flow. Second operand 9 states and 252 transitions. [2024-06-27 17:51:54,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 269 transitions, 3281 flow [2024-06-27 17:51:54,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 269 transitions, 3154 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:54,511 INFO L231 Difference]: Finished difference. Result has 218 places, 238 transitions, 2603 flow [2024-06-27 17:51:54,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2603, PETRI_PLACES=218, PETRI_TRANSITIONS=238} [2024-06-27 17:51:54,512 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-27 17:51:54,512 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 238 transitions, 2603 flow [2024-06-27 17:51:54,512 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 17:51:54,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:54,512 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 17:51:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:51:54,513 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 17:51:54,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash -830515754, now seen corresponding path program 4 times [2024-06-27 17:51:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:54,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333611458] [2024-06-27 17:51:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:54,581 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 17:51:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333611458] [2024-06-27 17:51:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333611458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:54,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:54,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695729971] [2024-06-27 17:51:54,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:54,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:54,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 238 transitions, 2603 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 17:51:54,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:54,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:54,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:55,293 INFO L124 PetriNetUnfolderBase]: 3568/5873 cut-off events. [2024-06-27 17:51:55,293 INFO L125 PetriNetUnfolderBase]: For 143358/143361 co-relation queries the response was YES. [2024-06-27 17:51:55,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31400 conditions, 5873 events. 3568/5873 cut-off events. For 143358/143361 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 40313 event pairs, 713 based on Foata normal form. 4/5866 useless extension candidates. Maximal degree in co-relation 31301. Up to 4943 conditions per place. [2024-06-27 17:51:55,434 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 177 selfloop transitions, 85 changer transitions 0/276 dead transitions. [2024-06-27 17:51:55,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 276 transitions, 3563 flow [2024-06-27 17:51:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:51:55,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:51:55,434 INFO L175 Difference]: Start difference. First operand has 218 places, 238 transitions, 2603 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:51:55,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 276 transitions, 3563 flow [2024-06-27 17:51:55,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 276 transitions, 3411 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:55,833 INFO L231 Difference]: Finished difference. Result has 220 places, 247 transitions, 2836 flow [2024-06-27 17:51:55,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2836, PETRI_PLACES=220, PETRI_TRANSITIONS=247} [2024-06-27 17:51:55,834 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2024-06-27 17:51:55,834 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 247 transitions, 2836 flow [2024-06-27 17:51:55,834 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 17:51:55,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:55,834 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 17:51:55,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:51:55,834 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 17:51:55,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash 436591576, now seen corresponding path program 5 times [2024-06-27 17:51:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:55,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539616816] [2024-06-27 17:51:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:55,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:55,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539616816] [2024-06-27 17:51:55,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539616816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:55,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:55,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:55,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814963211] [2024-06-27 17:51:55,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:55,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:55,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:55,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:55,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:55,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 247 transitions, 2836 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 17:51:55,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:55,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:55,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:56,609 INFO L124 PetriNetUnfolderBase]: 3590/6127 cut-off events. [2024-06-27 17:51:56,609 INFO L125 PetriNetUnfolderBase]: For 149953/149953 co-relation queries the response was YES. [2024-06-27 17:51:56,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32326 conditions, 6127 events. 3590/6127 cut-off events. For 149953/149953 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43108 event pairs, 823 based on Foata normal form. 2/6117 useless extension candidates. Maximal degree in co-relation 32225. Up to 4963 conditions per place. [2024-06-27 17:51:56,664 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 88 changer transitions 0/283 dead transitions. [2024-06-27 17:51:56,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 283 transitions, 3733 flow [2024-06-27 17:51:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:51:56,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 17:51:56,665 INFO L175 Difference]: Start difference. First operand has 220 places, 247 transitions, 2836 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:51:56,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 283 transitions, 3733 flow [2024-06-27 17:51:57,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 283 transitions, 3518 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:57,127 INFO L231 Difference]: Finished difference. Result has 224 places, 251 transitions, 2888 flow [2024-06-27 17:51:57,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2888, PETRI_PLACES=224, PETRI_TRANSITIONS=251} [2024-06-27 17:51:57,128 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-06-27 17:51:57,128 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 251 transitions, 2888 flow [2024-06-27 17:51:57,128 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 17:51:57,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:57,128 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 17:51:57,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:51:57,129 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 17:51:57,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash 436585996, now seen corresponding path program 6 times [2024-06-27 17:51:57,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:57,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652490629] [2024-06-27 17:51:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:57,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:57,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:57,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652490629] [2024-06-27 17:51:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652490629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:57,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:57,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188763950] [2024-06-27 17:51:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:57,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:57,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:57,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:57,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 251 transitions, 2888 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 17:51:57,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:57,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:57,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:57,941 INFO L124 PetriNetUnfolderBase]: 3586/6138 cut-off events. [2024-06-27 17:51:57,941 INFO L125 PetriNetUnfolderBase]: For 151121/151121 co-relation queries the response was YES. [2024-06-27 17:51:57,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32415 conditions, 6138 events. 3586/6138 cut-off events. For 151121/151121 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 43412 event pairs, 833 based on Foata normal form. 2/6125 useless extension candidates. Maximal degree in co-relation 32312. Up to 4961 conditions per place. [2024-06-27 17:51:57,995 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 184 selfloop transitions, 78 changer transitions 0/276 dead transitions. [2024-06-27 17:51:57,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 276 transitions, 3576 flow [2024-06-27 17:51:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:51:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:51:57,996 INFO L175 Difference]: Start difference. First operand has 224 places, 251 transitions, 2888 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:51:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 276 transitions, 3576 flow [2024-06-27 17:51:58,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 276 transitions, 3344 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:58,428 INFO L231 Difference]: Finished difference. Result has 224 places, 251 transitions, 2826 flow [2024-06-27 17:51:58,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2826, PETRI_PLACES=224, PETRI_TRANSITIONS=251} [2024-06-27 17:51:58,429 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-06-27 17:51:58,429 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 251 transitions, 2826 flow [2024-06-27 17:51:58,429 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 17:51:58,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:58,429 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 17:51:58,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:51:58,429 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 17:51:58,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1398389342, now seen corresponding path program 1 times [2024-06-27 17:51:58,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:58,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467616471] [2024-06-27 17:51:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:58,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:58,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:58,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467616471] [2024-06-27 17:51:58,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467616471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:58,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:58,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466504256] [2024-06-27 17:51:58,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:58,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:58,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:58,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:58,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 251 transitions, 2826 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 17:51:58,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:58,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:58,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:59,210 INFO L124 PetriNetUnfolderBase]: 3639/6016 cut-off events. [2024-06-27 17:51:59,211 INFO L125 PetriNetUnfolderBase]: For 159238/159238 co-relation queries the response was YES. [2024-06-27 17:51:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33018 conditions, 6016 events. 3639/6016 cut-off events. For 159238/159238 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 41388 event pairs, 736 based on Foata normal form. 1/5985 useless extension candidates. Maximal degree in co-relation 32914. Up to 4954 conditions per place. [2024-06-27 17:51:59,266 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 101 changer transitions 0/296 dead transitions. [2024-06-27 17:51:59,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 296 transitions, 3876 flow [2024-06-27 17:51:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:51:59,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 17:51:59,267 INFO L175 Difference]: Start difference. First operand has 224 places, 251 transitions, 2826 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:51:59,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 296 transitions, 3876 flow [2024-06-27 17:51:59,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 296 transitions, 3706 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:59,715 INFO L231 Difference]: Finished difference. Result has 226 places, 261 transitions, 3052 flow [2024-06-27 17:51:59,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=226, PETRI_TRANSITIONS=261} [2024-06-27 17:51:59,716 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 176 predicate places. [2024-06-27 17:51:59,716 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 261 transitions, 3052 flow [2024-06-27 17:51:59,716 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 17:51:59,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:59,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:59,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:51:59,716 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 17:51:59,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1805080102, now seen corresponding path program 2 times [2024-06-27 17:51:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:59,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142563391] [2024-06-27 17:51:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:59,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:59,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142563391] [2024-06-27 17:51:59,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142563391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:59,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:59,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440978113] [2024-06-27 17:51:59,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:59,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:59,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:59,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:59,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 261 transitions, 3052 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 17:51:59,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:59,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:00,521 INFO L124 PetriNetUnfolderBase]: 3636/5969 cut-off events. [2024-06-27 17:52:00,521 INFO L125 PetriNetUnfolderBase]: For 161865/161868 co-relation queries the response was YES. [2024-06-27 17:52:00,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33049 conditions, 5969 events. 3636/5969 cut-off events. For 161865/161868 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40838 event pairs, 688 based on Foata normal form. 3/5956 useless extension candidates. Maximal degree in co-relation 32944. Up to 5232 conditions per place. [2024-06-27 17:52:00,576 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 224 selfloop transitions, 53 changer transitions 0/291 dead transitions. [2024-06-27 17:52:00,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 291 transitions, 3676 flow [2024-06-27 17:52:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:52:00,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:52:00,577 INFO L175 Difference]: Start difference. First operand has 226 places, 261 transitions, 3052 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:52:00,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 291 transitions, 3676 flow [2024-06-27 17:52:01,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 291 transitions, 3489 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:01,011 INFO L231 Difference]: Finished difference. Result has 230 places, 261 transitions, 2977 flow [2024-06-27 17:52:01,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2977, PETRI_PLACES=230, PETRI_TRANSITIONS=261} [2024-06-27 17:52:01,011 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 180 predicate places. [2024-06-27 17:52:01,011 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 261 transitions, 2977 flow [2024-06-27 17:52:01,011 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 17:52:01,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:01,012 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 17:52:01,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:52:01,012 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 17:52:01,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:01,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1982211622, now seen corresponding path program 3 times [2024-06-27 17:52:01,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:01,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742312087] [2024-06-27 17:52:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:01,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:01,084 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 17:52:01,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:01,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742312087] [2024-06-27 17:52:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742312087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:01,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:01,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:01,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894102377] [2024-06-27 17:52:01,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:01,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:01,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 261 transitions, 2977 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 17:52:01,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:01,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:01,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:01,929 INFO L124 PetriNetUnfolderBase]: 3694/6064 cut-off events. [2024-06-27 17:52:01,929 INFO L125 PetriNetUnfolderBase]: For 168750/168753 co-relation queries the response was YES. [2024-06-27 17:52:01,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33570 conditions, 6064 events. 3694/6064 cut-off events. For 168750/168753 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 41547 event pairs, 688 based on Foata normal form. 3/6051 useless extension candidates. Maximal degree in co-relation 33464. Up to 5271 conditions per place. [2024-06-27 17:52:01,980 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 225 selfloop transitions, 68 changer transitions 0/307 dead transitions. [2024-06-27 17:52:01,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 307 transitions, 3996 flow [2024-06-27 17:52:01,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:52:01,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 17:52:01,981 INFO L175 Difference]: Start difference. First operand has 230 places, 261 transitions, 2977 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:52:01,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 307 transitions, 3996 flow [2024-06-27 17:52:02,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 307 transitions, 3848 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:02,599 INFO L231 Difference]: Finished difference. Result has 236 places, 276 transitions, 3256 flow [2024-06-27 17:52:02,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3256, PETRI_PLACES=236, PETRI_TRANSITIONS=276} [2024-06-27 17:52:02,599 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 186 predicate places. [2024-06-27 17:52:02,600 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 276 transitions, 3256 flow [2024-06-27 17:52:02,600 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 17:52:02,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:02,600 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 17:52:02,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:52:02,600 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 17:52:02,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash -369676510, now seen corresponding path program 4 times [2024-06-27 17:52:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:02,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532534026] [2024-06-27 17:52:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:02,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532534026] [2024-06-27 17:52:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532534026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:02,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:02,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413095043] [2024-06-27 17:52:02,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:02,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:02,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:02,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 276 transitions, 3256 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 17:52:02,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:02,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:02,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:03,425 INFO L124 PetriNetUnfolderBase]: 3775/6177 cut-off events. [2024-06-27 17:52:03,425 INFO L125 PetriNetUnfolderBase]: For 183099/183099 co-relation queries the response was YES. [2024-06-27 17:52:03,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34956 conditions, 6177 events. 3775/6177 cut-off events. For 183099/183099 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42386 event pairs, 676 based on Foata normal form. 1/6169 useless extension candidates. Maximal degree in co-relation 34847. Up to 5050 conditions per place. [2024-06-27 17:52:03,484 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 191 selfloop transitions, 117 changer transitions 0/322 dead transitions. [2024-06-27 17:52:03,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 322 transitions, 4409 flow [2024-06-27 17:52:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:52:03,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-27 17:52:03,485 INFO L175 Difference]: Start difference. First operand has 236 places, 276 transitions, 3256 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:52:03,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 322 transitions, 4409 flow [2024-06-27 17:52:04,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 322 transitions, 4287 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:04,039 INFO L231 Difference]: Finished difference. Result has 242 places, 290 transitions, 3640 flow [2024-06-27 17:52:04,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3640, PETRI_PLACES=242, PETRI_TRANSITIONS=290} [2024-06-27 17:52:04,039 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-06-27 17:52:04,040 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 290 transitions, 3640 flow [2024-06-27 17:52:04,040 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 17:52:04,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:04,040 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 17:52:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:52:04,040 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 17:52:04,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1464546940, now seen corresponding path program 5 times [2024-06-27 17:52:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:04,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565485820] [2024-06-27 17:52:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:04,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:04,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:04,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565485820] [2024-06-27 17:52:04,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565485820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:04,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:04,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:04,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616862251] [2024-06-27 17:52:04,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:04,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:04,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:04,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:04,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 290 transitions, 3640 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 17:52:04,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:04,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:04,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:05,054 INFO L124 PetriNetUnfolderBase]: 3772/6173 cut-off events. [2024-06-27 17:52:05,054 INFO L125 PetriNetUnfolderBase]: For 188141/188141 co-relation queries the response was YES. [2024-06-27 17:52:05,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35443 conditions, 6173 events. 3772/6173 cut-off events. For 188141/188141 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42285 event pairs, 676 based on Foata normal form. 1/6165 useless extension candidates. Maximal degree in co-relation 35332. Up to 5048 conditions per place. [2024-06-27 17:52:05,120 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 189 selfloop transitions, 120 changer transitions 0/323 dead transitions. [2024-06-27 17:52:05,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 323 transitions, 4682 flow [2024-06-27 17:52:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:52:05,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:52:05,121 INFO L175 Difference]: Start difference. First operand has 242 places, 290 transitions, 3640 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:52:05,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 323 transitions, 4682 flow [2024-06-27 17:52:05,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 323 transitions, 4518 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:05,761 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 3722 flow [2024-06-27 17:52:05,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3476, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3722, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-27 17:52:05,761 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-06-27 17:52:05,761 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 3722 flow [2024-06-27 17:52:05,761 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 17:52:05,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:05,761 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 17:52:05,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:52:05,762 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 17:52:05,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1782336748, now seen corresponding path program 6 times [2024-06-27 17:52:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884520940] [2024-06-27 17:52:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884520940] [2024-06-27 17:52:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884520940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:05,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:05,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:05,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161535638] [2024-06-27 17:52:05,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:05,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:05,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:05,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:05,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:05,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 3722 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 17:52:05,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:05,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:05,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:06,607 INFO L124 PetriNetUnfolderBase]: 3769/6169 cut-off events. [2024-06-27 17:52:06,607 INFO L125 PetriNetUnfolderBase]: For 192623/192623 co-relation queries the response was YES. [2024-06-27 17:52:06,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35522 conditions, 6169 events. 3769/6169 cut-off events. For 192623/192623 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42425 event pairs, 676 based on Foata normal form. 1/6161 useless extension candidates. Maximal degree in co-relation 35410. Up to 5388 conditions per place. [2024-06-27 17:52:06,666 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 246 selfloop transitions, 57 changer transitions 0/317 dead transitions. [2024-06-27 17:52:06,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 317 transitions, 4390 flow [2024-06-27 17:52:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:52:06,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:52:06,667 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 3722 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:52:06,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 317 transitions, 4390 flow [2024-06-27 17:52:07,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 317 transitions, 3946 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:07,404 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 3398 flow [2024-06-27 17:52:07,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3398, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-27 17:52:07,405 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-06-27 17:52:07,405 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 3398 flow [2024-06-27 17:52:07,405 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 17:52:07,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:07,405 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 17:52:07,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:52:07,405 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 17:52:07,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash 952624446, now seen corresponding path program 7 times [2024-06-27 17:52:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:07,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772511321] [2024-06-27 17:52:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:07,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:07,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772511321] [2024-06-27 17:52:07,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772511321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:07,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:07,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:07,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494302067] [2024-06-27 17:52:07,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:07,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:07,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:07,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:07,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 3398 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 17:52:07,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:07,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:07,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:08,252 INFO L124 PetriNetUnfolderBase]: 3761/6405 cut-off events. [2024-06-27 17:52:08,253 INFO L125 PetriNetUnfolderBase]: For 194065/194065 co-relation queries the response was YES. [2024-06-27 17:52:08,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34907 conditions, 6405 events. 3761/6405 cut-off events. For 194065/194065 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45473 event pairs, 830 based on Foata normal form. 2/6389 useless extension candidates. Maximal degree in co-relation 34795. Up to 5038 conditions per place. [2024-06-27 17:52:08,315 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 195 selfloop transitions, 109 changer transitions 0/318 dead transitions. [2024-06-27 17:52:08,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 318 transitions, 4190 flow [2024-06-27 17:52:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:52:08,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-06-27 17:52:08,316 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 3398 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:52:08,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 318 transitions, 4190 flow [2024-06-27 17:52:08,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 318 transitions, 4046 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:08,883 INFO L231 Difference]: Finished difference. Result has 248 places, 290 transitions, 3480 flow [2024-06-27 17:52:08,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3480, PETRI_PLACES=248, PETRI_TRANSITIONS=290} [2024-06-27 17:52:08,883 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-27 17:52:08,883 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 290 transitions, 3480 flow [2024-06-27 17:52:08,883 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 17:52:08,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:08,884 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 17:52:08,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:52:08,884 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 17:52:08,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash 309376884, now seen corresponding path program 8 times [2024-06-27 17:52:08,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:08,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399654494] [2024-06-27 17:52:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:08,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:08,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:08,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399654494] [2024-06-27 17:52:08,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399654494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:08,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:08,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:08,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574437920] [2024-06-27 17:52:08,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:08,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:08,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:08,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:08,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 290 transitions, 3480 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 17:52:08,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:08,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:08,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:09,745 INFO L124 PetriNetUnfolderBase]: 3755/6149 cut-off events. [2024-06-27 17:52:09,745 INFO L125 PetriNetUnfolderBase]: For 194729/194729 co-relation queries the response was YES. [2024-06-27 17:52:09,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34849 conditions, 6149 events. 3755/6149 cut-off events. For 194729/194729 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42265 event pairs, 676 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 34736. Up to 5280 conditions per place. [2024-06-27 17:52:09,806 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 235 selfloop transitions, 72 changer transitions 0/321 dead transitions. [2024-06-27 17:52:09,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 321 transitions, 4284 flow [2024-06-27 17:52:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-06-27 17:52:09,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:52:09,807 INFO L175 Difference]: Start difference. First operand has 248 places, 290 transitions, 3480 flow. Second operand 9 states and 252 transitions. [2024-06-27 17:52:09,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 321 transitions, 4284 flow [2024-06-27 17:52:10,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 321 transitions, 4052 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:10,417 INFO L231 Difference]: Finished difference. Result has 251 places, 290 transitions, 3399 flow [2024-06-27 17:52:10,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3399, PETRI_PLACES=251, PETRI_TRANSITIONS=290} [2024-06-27 17:52:10,417 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-06-27 17:52:10,418 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 290 transitions, 3399 flow [2024-06-27 17:52:10,418 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 17:52:10,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:10,418 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 17:52:10,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:52:10,418 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 17:52:10,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:10,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1080375100, now seen corresponding path program 9 times [2024-06-27 17:52:10,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:10,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343323323] [2024-06-27 17:52:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:10,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:10,482 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 17:52:10,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:10,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343323323] [2024-06-27 17:52:10,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343323323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:10,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:10,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642640616] [2024-06-27 17:52:10,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:10,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:10,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:10,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 290 transitions, 3399 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 17:52:10,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:10,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:10,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:11,299 INFO L124 PetriNetUnfolderBase]: 3747/6137 cut-off events. [2024-06-27 17:52:11,299 INFO L125 PetriNetUnfolderBase]: For 195418/195418 co-relation queries the response was YES. [2024-06-27 17:52:11,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34479 conditions, 6137 events. 3747/6137 cut-off events. For 195418/195418 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42195 event pairs, 676 based on Foata normal form. 2/6130 useless extension candidates. Maximal degree in co-relation 34365. Up to 5272 conditions per place. [2024-06-27 17:52:11,365 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 68 changer transitions 0/314 dead transitions. [2024-06-27 17:52:11,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 314 transitions, 4053 flow [2024-06-27 17:52:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:52:11,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:52:11,366 INFO L175 Difference]: Start difference. First operand has 251 places, 290 transitions, 3399 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:52:11,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 314 transitions, 4053 flow [2024-06-27 17:52:12,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 314 transitions, 3819 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:12,040 INFO L231 Difference]: Finished difference. Result has 250 places, 290 transitions, 3310 flow [2024-06-27 17:52:12,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3310, PETRI_PLACES=250, PETRI_TRANSITIONS=290} [2024-06-27 17:52:12,040 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-06-27 17:52:12,040 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 290 transitions, 3310 flow [2024-06-27 17:52:12,040 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 17:52:12,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:12,040 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 17:52:12,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:52:12,041 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 17:52:12,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:12,041 INFO L85 PathProgramCache]: Analyzing trace with hash -204539196, now seen corresponding path program 10 times [2024-06-27 17:52:12,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190884011] [2024-06-27 17:52:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:12,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:12,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:12,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190884011] [2024-06-27 17:52:12,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190884011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:12,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:12,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:12,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337397401] [2024-06-27 17:52:12,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:12,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:12,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:12,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 290 transitions, 3310 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 17:52:12,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:12,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:12,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:12,939 INFO L124 PetriNetUnfolderBase]: 3741/6129 cut-off events. [2024-06-27 17:52:12,939 INFO L125 PetriNetUnfolderBase]: For 195781/195781 co-relation queries the response was YES. [2024-06-27 17:52:12,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34161 conditions, 6129 events. 3741/6129 cut-off events. For 195781/195781 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42216 event pairs, 676 based on Foata normal form. 2/6122 useless extension candidates. Maximal degree in co-relation 34047. Up to 5088 conditions per place. [2024-06-27 17:52:13,005 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 202 selfloop transitions, 115 changer transitions 0/331 dead transitions. [2024-06-27 17:52:13,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 331 transitions, 4292 flow [2024-06-27 17:52:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 17:52:13,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603260869565217 [2024-06-27 17:52:13,006 INFO L175 Difference]: Start difference. First operand has 250 places, 290 transitions, 3310 flow. Second operand 8 states and 243 transitions. [2024-06-27 17:52:13,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 331 transitions, 4292 flow [2024-06-27 17:52:13,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 331 transitions, 4128 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:13,707 INFO L231 Difference]: Finished difference. Result has 252 places, 290 transitions, 3396 flow [2024-06-27 17:52:13,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3396, PETRI_PLACES=252, PETRI_TRANSITIONS=290} [2024-06-27 17:52:13,708 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 202 predicate places. [2024-06-27 17:52:13,708 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 290 transitions, 3396 flow [2024-06-27 17:52:13,708 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 17:52:13,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:13,708 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 17:52:13,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:52:13,708 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 17:52:13,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash -14532260, now seen corresponding path program 11 times [2024-06-27 17:52:13,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:13,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506150079] [2024-06-27 17:52:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:13,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:13,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:13,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506150079] [2024-06-27 17:52:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506150079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:13,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721445414] [2024-06-27 17:52:13,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:13,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:13,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:13,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:13,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 290 transitions, 3396 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 17:52:13,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:13,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:13,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:14,607 INFO L124 PetriNetUnfolderBase]: 3735/6403 cut-off events. [2024-06-27 17:52:14,608 INFO L125 PetriNetUnfolderBase]: For 199498/199498 co-relation queries the response was YES. [2024-06-27 17:52:14,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34603 conditions, 6403 events. 3735/6403 cut-off events. For 199498/199498 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45651 event pairs, 840 based on Foata normal form. 2/6387 useless extension candidates. Maximal degree in co-relation 34488. Up to 5083 conditions per place. [2024-06-27 17:52:14,677 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 201 selfloop transitions, 103 changer transitions 0/318 dead transitions. [2024-06-27 17:52:14,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 318 transitions, 4198 flow [2024-06-27 17:52:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:52:14,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:52:14,678 INFO L175 Difference]: Start difference. First operand has 252 places, 290 transitions, 3396 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:52:14,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 318 transitions, 4198 flow [2024-06-27 17:52:15,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 318 transitions, 3849 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-27 17:52:15,313 INFO L231 Difference]: Finished difference. Result has 247 places, 290 transitions, 3280 flow [2024-06-27 17:52:15,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3280, PETRI_PLACES=247, PETRI_TRANSITIONS=290} [2024-06-27 17:52:15,314 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 197 predicate places. [2024-06-27 17:52:15,314 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 290 transitions, 3280 flow [2024-06-27 17:52:15,314 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 17:52:15,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:15,314 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 17:52:15,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:52:15,314 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 17:52:15,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -411192636, now seen corresponding path program 12 times [2024-06-27 17:52:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:15,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554934203] [2024-06-27 17:52:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:15,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:15,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:15,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554934203] [2024-06-27 17:52:15,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554934203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:15,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:15,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431202333] [2024-06-27 17:52:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:15,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:15,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:15,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 290 transitions, 3280 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 17:52:15,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:15,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:15,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:16,202 INFO L124 PetriNetUnfolderBase]: 3727/6246 cut-off events. [2024-06-27 17:52:16,202 INFO L125 PetriNetUnfolderBase]: For 183813/183816 co-relation queries the response was YES. [2024-06-27 17:52:16,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33861 conditions, 6246 events. 3727/6246 cut-off events. For 183813/183816 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 43634 event pairs, 853 based on Foata normal form. 4/6233 useless extension candidates. Maximal degree in co-relation 33748. Up to 5075 conditions per place. [2024-06-27 17:52:16,270 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 195 selfloop transitions, 123 changer transitions 0/332 dead transitions. [2024-06-27 17:52:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 332 transitions, 4016 flow [2024-06-27 17:52:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 17:52:16,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6657608695652174 [2024-06-27 17:52:16,271 INFO L175 Difference]: Start difference. First operand has 247 places, 290 transitions, 3280 flow. Second operand 8 states and 245 transitions. [2024-06-27 17:52:16,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 332 transitions, 4016 flow [2024-06-27 17:52:16,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 332 transitions, 3767 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:16,992 INFO L231 Difference]: Finished difference. Result has 248 places, 290 transitions, 3296 flow [2024-06-27 17:52:16,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3296, PETRI_PLACES=248, PETRI_TRANSITIONS=290} [2024-06-27 17:52:16,993 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-27 17:52:16,993 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 290 transitions, 3296 flow [2024-06-27 17:52:16,993 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 17:52:16,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:16,993 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 17:52:16,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:52:16,993 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 17:52:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash -398434152, now seen corresponding path program 1 times [2024-06-27 17:52:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40744583] [2024-06-27 17:52:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40744583] [2024-06-27 17:52:17,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40744583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:17,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:17,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:17,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946037954] [2024-06-27 17:52:17,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:17,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:17,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:17,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:52:17,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 290 transitions, 3296 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:17,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:17,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:52:17,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:17,810 INFO L124 PetriNetUnfolderBase]: 3600/6123 cut-off events. [2024-06-27 17:52:17,810 INFO L125 PetriNetUnfolderBase]: For 188908/188912 co-relation queries the response was YES. [2024-06-27 17:52:17,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33054 conditions, 6123 events. 3600/6123 cut-off events. For 188908/188912 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43558 event pairs, 1049 based on Foata normal form. 9/6038 useless extension candidates. Maximal degree in co-relation 32942. Up to 4909 conditions per place. [2024-06-27 17:52:17,874 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 237 selfloop transitions, 27 changer transitions 0/319 dead transitions. [2024-06-27 17:52:17,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 319 transitions, 3920 flow [2024-06-27 17:52:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-27 17:52:17,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-27 17:52:17,875 INFO L175 Difference]: Start difference. First operand has 248 places, 290 transitions, 3296 flow. Second operand 5 states and 161 transitions. [2024-06-27 17:52:17,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 319 transitions, 3920 flow [2024-06-27 17:52:18,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 319 transitions, 3660 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:18,463 INFO L231 Difference]: Finished difference. Result has 244 places, 291 transitions, 3112 flow [2024-06-27 17:52:18,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3036, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3112, PETRI_PLACES=244, PETRI_TRANSITIONS=291} [2024-06-27 17:52:18,464 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-27 17:52:18,464 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 291 transitions, 3112 flow [2024-06-27 17:52:18,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:18,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:18,464 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 17:52:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:52:18,464 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 17:52:18,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 32387418, now seen corresponding path program 2 times [2024-06-27 17:52:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:18,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401750747] [2024-06-27 17:52:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:18,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401750747] [2024-06-27 17:52:18,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401750747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:18,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:18,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:18,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296647828] [2024-06-27 17:52:18,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:18,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:52:18,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 291 transitions, 3112 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:18,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:18,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:52:18,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:19,288 INFO L124 PetriNetUnfolderBase]: 3626/6006 cut-off events. [2024-06-27 17:52:19,288 INFO L125 PetriNetUnfolderBase]: For 170287/170307 co-relation queries the response was YES. [2024-06-27 17:52:19,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32275 conditions, 6006 events. 3626/6006 cut-off events. For 170287/170307 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 41745 event pairs, 515 based on Foata normal form. 28/5983 useless extension candidates. Maximal degree in co-relation 32164. Up to 4720 conditions per place. [2024-06-27 17:52:19,349 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 239 selfloop transitions, 24 changer transitions 0/318 dead transitions. [2024-06-27 17:52:19,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 3856 flow [2024-06-27 17:52:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-27 17:52:19,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 17:52:19,350 INFO L175 Difference]: Start difference. First operand has 244 places, 291 transitions, 3112 flow. Second operand 5 states and 155 transitions. [2024-06-27 17:52:19,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 3856 flow [2024-06-27 17:52:19,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 318 transitions, 3806 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:19,887 INFO L231 Difference]: Finished difference. Result has 246 places, 292 transitions, 3126 flow [2024-06-27 17:52:19,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3126, PETRI_PLACES=246, PETRI_TRANSITIONS=292} [2024-06-27 17:52:19,887 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-06-27 17:52:19,888 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 292 transitions, 3126 flow [2024-06-27 17:52:19,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:19,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:19,888 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 17:52:19,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:52:19,888 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 17:52:19,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1198513310, now seen corresponding path program 1 times [2024-06-27 17:52:19,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:19,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113433344] [2024-06-27 17:52:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:19,963 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 17:52:19,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:19,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113433344] [2024-06-27 17:52:19,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113433344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:19,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:19,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:19,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778670646] [2024-06-27 17:52:19,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:19,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:19,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:19,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:19,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:19,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:19,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 292 transitions, 3126 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 17:52:19,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:19,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:19,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:20,799 INFO L124 PetriNetUnfolderBase]: 3827/6450 cut-off events. [2024-06-27 17:52:20,799 INFO L125 PetriNetUnfolderBase]: For 169106/169106 co-relation queries the response was YES. [2024-06-27 17:52:20,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34038 conditions, 6450 events. 3827/6450 cut-off events. For 169106/169106 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 45724 event pairs, 1268 based on Foata normal form. 2/6401 useless extension candidates. Maximal degree in co-relation 33926. Up to 5596 conditions per place. [2024-06-27 17:52:20,864 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 284 selfloop transitions, 31 changer transitions 0/329 dead transitions. [2024-06-27 17:52:20,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 329 transitions, 4064 flow [2024-06-27 17:52:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:52:20,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:52:20,864 INFO L175 Difference]: Start difference. First operand has 246 places, 292 transitions, 3126 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:52:20,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 329 transitions, 4064 flow [2024-06-27 17:52:21,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 329 transitions, 4023 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:21,408 INFO L231 Difference]: Finished difference. Result has 251 places, 296 transitions, 3268 flow [2024-06-27 17:52:21,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3085, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3268, PETRI_PLACES=251, PETRI_TRANSITIONS=296} [2024-06-27 17:52:21,408 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-06-27 17:52:21,409 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 296 transitions, 3268 flow [2024-06-27 17:52:21,409 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 17:52:21,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:21,409 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 17:52:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:52:21,409 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 17:52:21,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1680209418, now seen corresponding path program 2 times [2024-06-27 17:52:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:21,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752442683] [2024-06-27 17:52:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:21,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:21,482 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 17:52:21,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:21,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752442683] [2024-06-27 17:52:21,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752442683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:21,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:21,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989626486] [2024-06-27 17:52:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:21,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:21,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:21,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:21,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 296 transitions, 3268 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 17:52:21,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:21,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:21,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:22,304 INFO L124 PetriNetUnfolderBase]: 3845/6309 cut-off events. [2024-06-27 17:52:22,304 INFO L125 PetriNetUnfolderBase]: For 173880/173880 co-relation queries the response was YES. [2024-06-27 17:52:22,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34138 conditions, 6309 events. 3845/6309 cut-off events. For 173880/173880 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43768 event pairs, 670 based on Foata normal form. 2/6308 useless extension candidates. Maximal degree in co-relation 34025. Up to 5677 conditions per place. [2024-06-27 17:52:22,368 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 284 selfloop transitions, 28 changer transitions 0/326 dead transitions. [2024-06-27 17:52:22,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 326 transitions, 4016 flow [2024-06-27 17:52:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 17:52:22,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:52:22,369 INFO L175 Difference]: Start difference. First operand has 251 places, 296 transitions, 3268 flow. Second operand 7 states and 196 transitions. [2024-06-27 17:52:22,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 326 transitions, 4016 flow [2024-06-27 17:52:23,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 326 transitions, 3890 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:23,014 INFO L231 Difference]: Finished difference. Result has 255 places, 298 transitions, 3267 flow [2024-06-27 17:52:23,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3267, PETRI_PLACES=255, PETRI_TRANSITIONS=298} [2024-06-27 17:52:23,015 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 205 predicate places. [2024-06-27 17:52:23,015 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 298 transitions, 3267 flow [2024-06-27 17:52:23,015 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 17:52:23,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:23,015 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 17:52:23,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:52:23,015 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 17:52:23,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:23,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1795500588, now seen corresponding path program 3 times [2024-06-27 17:52:23,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:23,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066283616] [2024-06-27 17:52:23,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:23,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066283616] [2024-06-27 17:52:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066283616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:23,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:23,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978855044] [2024-06-27 17:52:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:23,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:23,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:23,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:23,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:23,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:23,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 298 transitions, 3267 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 17:52:23,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:23,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:23,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:23,930 INFO L124 PetriNetUnfolderBase]: 3863/6482 cut-off events. [2024-06-27 17:52:23,930 INFO L125 PetriNetUnfolderBase]: For 178808/178808 co-relation queries the response was YES. [2024-06-27 17:52:23,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34307 conditions, 6482 events. 3863/6482 cut-off events. For 178808/178808 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45707 event pairs, 1239 based on Foata normal form. 2/6455 useless extension candidates. Maximal degree in co-relation 34192. Up to 5730 conditions per place. [2024-06-27 17:52:23,996 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 291 selfloop transitions, 20 changer transitions 0/325 dead transitions. [2024-06-27 17:52:23,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 325 transitions, 3987 flow [2024-06-27 17:52:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 17:52:23,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962732919254659 [2024-06-27 17:52:23,997 INFO L175 Difference]: Start difference. First operand has 255 places, 298 transitions, 3267 flow. Second operand 7 states and 192 transitions. [2024-06-27 17:52:23,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 325 transitions, 3987 flow [2024-06-27 17:52:24,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 325 transitions, 3904 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:24,541 INFO L231 Difference]: Finished difference. Result has 257 places, 300 transitions, 3275 flow [2024-06-27 17:52:24,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3275, PETRI_PLACES=257, PETRI_TRANSITIONS=300} [2024-06-27 17:52:24,541 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-06-27 17:52:24,541 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 300 transitions, 3275 flow [2024-06-27 17:52:24,541 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 17:52:24,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:24,541 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 17:52:24,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:52:24,541 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 17:52:24,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:24,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1795685286, now seen corresponding path program 1 times [2024-06-27 17:52:24,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:24,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791619266] [2024-06-27 17:52:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:24,608 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 17:52:24,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:24,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791619266] [2024-06-27 17:52:24,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791619266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:24,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:24,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:24,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448540459] [2024-06-27 17:52:24,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:24,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:24,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:24,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:24,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 300 transitions, 3275 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 17:52:24,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:24,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:24,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:25,444 INFO L124 PetriNetUnfolderBase]: 3899/6392 cut-off events. [2024-06-27 17:52:25,444 INFO L125 PetriNetUnfolderBase]: For 187019/187019 co-relation queries the response was YES. [2024-06-27 17:52:25,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34499 conditions, 6392 events. 3899/6392 cut-off events. For 187019/187019 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44304 event pairs, 694 based on Foata normal form. 4/6387 useless extension candidates. Maximal degree in co-relation 34383. Up to 5566 conditions per place. [2024-06-27 17:52:25,506 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 259 selfloop transitions, 55 changer transitions 0/328 dead transitions. [2024-06-27 17:52:25,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 328 transitions, 4019 flow [2024-06-27 17:52:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:52:25,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 17:52:25,507 INFO L175 Difference]: Start difference. First operand has 257 places, 300 transitions, 3275 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:52:25,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 328 transitions, 4019 flow [2024-06-27 17:52:26,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 328 transitions, 3948 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:26,017 INFO L231 Difference]: Finished difference. Result has 259 places, 303 transitions, 3386 flow [2024-06-27 17:52:26,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3386, PETRI_PLACES=259, PETRI_TRANSITIONS=303} [2024-06-27 17:52:26,017 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 209 predicate places. [2024-06-27 17:52:26,017 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 303 transitions, 3386 flow [2024-06-27 17:52:26,018 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 17:52:26,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:26,018 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 17:52:26,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:52:26,018 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 17:52:26,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -204262366, now seen corresponding path program 4 times [2024-06-27 17:52:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:26,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397990471] [2024-06-27 17:52:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:26,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397990471] [2024-06-27 17:52:26,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397990471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:26,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:26,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:26,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073529675] [2024-06-27 17:52:26,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:26,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:26,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:26,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:26,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:26,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 303 transitions, 3386 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 17:52:26,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:26,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:26,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:26,960 INFO L124 PetriNetUnfolderBase]: 3894/6560 cut-off events. [2024-06-27 17:52:26,960 INFO L125 PetriNetUnfolderBase]: For 186456/186456 co-relation queries the response was YES. [2024-06-27 17:52:27,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34888 conditions, 6560 events. 3894/6560 cut-off events. For 186456/186456 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46519 event pairs, 1189 based on Foata normal form. 2/6534 useless extension candidates. Maximal degree in co-relation 34771. Up to 5715 conditions per place. [2024-06-27 17:52:27,026 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 288 selfloop transitions, 29 changer transitions 0/331 dead transitions. [2024-06-27 17:52:27,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 331 transitions, 4086 flow [2024-06-27 17:52:27,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:52:27,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 17:52:27,027 INFO L175 Difference]: Start difference. First operand has 259 places, 303 transitions, 3386 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:52:27,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 331 transitions, 4086 flow [2024-06-27 17:52:27,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 331 transitions, 3898 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:27,587 INFO L231 Difference]: Finished difference. Result has 260 places, 303 transitions, 3267 flow [2024-06-27 17:52:27,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3267, PETRI_PLACES=260, PETRI_TRANSITIONS=303} [2024-06-27 17:52:27,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 210 predicate places. [2024-06-27 17:52:27,587 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 303 transitions, 3267 flow [2024-06-27 17:52:27,588 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 17:52:27,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:27,588 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 17:52:27,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:52:27,588 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 17:52:27,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash 23823482, now seen corresponding path program 2 times [2024-06-27 17:52:27,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:27,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778162105] [2024-06-27 17:52:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:27,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778162105] [2024-06-27 17:52:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778162105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:27,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:27,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:27,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701111831] [2024-06-27 17:52:27,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:27,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:27,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:27,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 303 transitions, 3267 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 17:52:27,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:27,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:27,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:28,493 INFO L124 PetriNetUnfolderBase]: 3930/6472 cut-off events. [2024-06-27 17:52:28,493 INFO L125 PetriNetUnfolderBase]: For 194938/194941 co-relation queries the response was YES. [2024-06-27 17:52:28,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34744 conditions, 6472 events. 3930/6472 cut-off events. For 194938/194941 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45162 event pairs, 738 based on Foata normal form. 6/6458 useless extension candidates. Maximal degree in co-relation 34626. Up to 5611 conditions per place. [2024-06-27 17:52:28,559 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 254 selfloop transitions, 57 changer transitions 0/325 dead transitions. [2024-06-27 17:52:28,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 325 transitions, 3997 flow [2024-06-27 17:52:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:52:28,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:52:28,560 INFO L175 Difference]: Start difference. First operand has 260 places, 303 transitions, 3267 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:52:28,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 325 transitions, 3997 flow [2024-06-27 17:52:29,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 325 transitions, 3930 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:29,187 INFO L231 Difference]: Finished difference. Result has 261 places, 306 transitions, 3392 flow [2024-06-27 17:52:29,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3392, PETRI_PLACES=261, PETRI_TRANSITIONS=306} [2024-06-27 17:52:29,187 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 211 predicate places. [2024-06-27 17:52:29,188 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 306 transitions, 3392 flow [2024-06-27 17:52:29,188 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 17:52:29,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:29,188 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 17:52:29,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:52:29,188 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 17:52:29,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash -204077668, now seen corresponding path program 3 times [2024-06-27 17:52:29,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:29,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619023225] [2024-06-27 17:52:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:29,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619023225] [2024-06-27 17:52:29,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619023225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:29,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:29,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:29,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338331366] [2024-06-27 17:52:29,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:29,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:29,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:29,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:29,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:29,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 306 transitions, 3392 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 17:52:29,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:29,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:29,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:30,092 INFO L124 PetriNetUnfolderBase]: 3966/6489 cut-off events. [2024-06-27 17:52:30,092 INFO L125 PetriNetUnfolderBase]: For 197343/197343 co-relation queries the response was YES. [2024-06-27 17:52:30,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35518 conditions, 6489 events. 3966/6489 cut-off events. For 197343/197343 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44994 event pairs, 701 based on Foata normal form. 4/6484 useless extension candidates. Maximal degree in co-relation 35399. Up to 5635 conditions per place. [2024-06-27 17:52:30,160 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 257 selfloop transitions, 60 changer transitions 0/331 dead transitions. [2024-06-27 17:52:30,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 331 transitions, 4148 flow [2024-06-27 17:52:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:52:30,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:52:30,161 INFO L175 Difference]: Start difference. First operand has 261 places, 306 transitions, 3392 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:52:30,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 331 transitions, 4148 flow [2024-06-27 17:52:30,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 331 transitions, 3978 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:30,882 INFO L231 Difference]: Finished difference. Result has 263 places, 309 transitions, 3430 flow [2024-06-27 17:52:30,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3430, PETRI_PLACES=263, PETRI_TRANSITIONS=309} [2024-06-27 17:52:30,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 213 predicate places. [2024-06-27 17:52:30,882 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 309 transitions, 3430 flow [2024-06-27 17:52:30,882 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 17:52:30,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:30,883 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 17:52:30,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:52:30,883 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 17:52:30,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 32394362, now seen corresponding path program 4 times [2024-06-27 17:52:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928702174] [2024-06-27 17:52:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:30,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:30,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928702174] [2024-06-27 17:52:30,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928702174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:30,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:30,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:30,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814380670] [2024-06-27 17:52:30,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:30,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:30,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:30,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:30,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 309 transitions, 3430 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 17:52:30,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:30,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:30,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:31,839 INFO L124 PetriNetUnfolderBase]: 3979/6528 cut-off events. [2024-06-27 17:52:31,839 INFO L125 PetriNetUnfolderBase]: For 200432/200435 co-relation queries the response was YES. [2024-06-27 17:52:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35630 conditions, 6528 events. 3979/6528 cut-off events. For 200432/200435 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 45442 event pairs, 721 based on Foata normal form. 6/6514 useless extension candidates. Maximal degree in co-relation 35510. Up to 5562 conditions per place. [2024-06-27 17:52:31,896 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 252 selfloop transitions, 68 changer transitions 0/334 dead transitions. [2024-06-27 17:52:31,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 334 transitions, 4221 flow [2024-06-27 17:52:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:52:31,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-06-27 17:52:31,897 INFO L175 Difference]: Start difference. First operand has 263 places, 309 transitions, 3430 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:52:31,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 334 transitions, 4221 flow [2024-06-27 17:52:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 334 transitions, 4033 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:32,433 INFO L231 Difference]: Finished difference. Result has 266 places, 314 transitions, 3515 flow [2024-06-27 17:52:32,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3515, PETRI_PLACES=266, PETRI_TRANSITIONS=314} [2024-06-27 17:52:32,434 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 216 predicate places. [2024-06-27 17:52:32,434 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 314 transitions, 3515 flow [2024-06-27 17:52:32,434 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 17:52:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:32,434 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 17:52:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:52:32,434 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:32,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1264352212, now seen corresponding path program 1 times [2024-06-27 17:52:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:32,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475815016] [2024-06-27 17:52:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:32,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:32,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475815016] [2024-06-27 17:52:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475815016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:32,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:32,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:52:32,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463480386] [2024-06-27 17:52:32,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:32,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:52:32,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:52:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:52:32,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2024-06-27 17:52:32,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 314 transitions, 3515 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:32,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:32,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2024-06-27 17:52:32,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:33,283 INFO L124 PetriNetUnfolderBase]: 2547/5571 cut-off events. [2024-06-27 17:52:33,283 INFO L125 PetriNetUnfolderBase]: For 91354/91670 co-relation queries the response was YES. [2024-06-27 17:52:33,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22393 conditions, 5571 events. 2547/5571 cut-off events. For 91354/91670 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 49018 event pairs, 373 based on Foata normal form. 249/5392 useless extension candidates. Maximal degree in co-relation 22271. Up to 2191 conditions per place. [2024-06-27 17:52:33,338 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 30 selfloop transitions, 78 changer transitions 0/331 dead transitions. [2024-06-27 17:52:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 331 transitions, 3833 flow [2024-06-27 17:52:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:52:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:52:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-06-27 17:52:33,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7663043478260869 [2024-06-27 17:52:33,339 INFO L175 Difference]: Start difference. First operand has 266 places, 314 transitions, 3515 flow. Second operand 4 states and 141 transitions. [2024-06-27 17:52:33,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 331 transitions, 3833 flow [2024-06-27 17:52:33,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 331 transitions, 3683 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:33,620 INFO L231 Difference]: Finished difference. Result has 269 places, 318 transitions, 3727 flow [2024-06-27 17:52:33,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3727, PETRI_PLACES=269, PETRI_TRANSITIONS=318} [2024-06-27 17:52:33,620 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 219 predicate places. [2024-06-27 17:52:33,620 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 318 transitions, 3727 flow [2024-06-27 17:52:33,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:33,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:33,621 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 17:52:33,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:52:33,621 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 17:52:33,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1331652841, now seen corresponding path program 1 times [2024-06-27 17:52:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:33,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545678916] [2024-06-27 17:52:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:33,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:33,699 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 17:52:33,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545678916] [2024-06-27 17:52:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545678916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:33,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:33,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:33,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252263215] [2024-06-27 17:52:33,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:33,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:33,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:33,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:33,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 318 transitions, 3727 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 17:52:33,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:33,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:33,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:34,757 INFO L124 PetriNetUnfolderBase]: 4259/7311 cut-off events. [2024-06-27 17:52:34,757 INFO L125 PetriNetUnfolderBase]: For 278338/278372 co-relation queries the response was YES. [2024-06-27 17:52:34,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42496 conditions, 7311 events. 4259/7311 cut-off events. For 278338/278372 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53412 event pairs, 1186 based on Foata normal form. 12/7048 useless extension candidates. Maximal degree in co-relation 42371. Up to 5291 conditions per place. [2024-06-27 17:52:34,831 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 117 changer transitions 0/364 dead transitions. [2024-06-27 17:52:34,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 364 transitions, 5037 flow [2024-06-27 17:52:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:52:34,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-27 17:52:34,832 INFO L175 Difference]: Start difference. First operand has 269 places, 318 transitions, 3727 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:52:34,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 364 transitions, 5037 flow [2024-06-27 17:52:35,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 364 transitions, 5035 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:35,560 INFO L231 Difference]: Finished difference. Result has 277 places, 323 transitions, 4112 flow [2024-06-27 17:52:35,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3725, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4112, PETRI_PLACES=277, PETRI_TRANSITIONS=323} [2024-06-27 17:52:35,560 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 227 predicate places. [2024-06-27 17:52:35,560 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 323 transitions, 4112 flow [2024-06-27 17:52:35,560 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 17:52:35,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:35,560 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 17:52:35,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:52:35,560 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 17:52:35,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1502672015, now seen corresponding path program 2 times [2024-06-27 17:52:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:35,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738961983] [2024-06-27 17:52:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:35,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:35,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738961983] [2024-06-27 17:52:35,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738961983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:35,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:35,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230269582] [2024-06-27 17:52:35,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:35,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:35,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:35,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:35,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 323 transitions, 4112 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 17:52:35,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:35,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:35,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:36,706 INFO L124 PetriNetUnfolderBase]: 4407/7527 cut-off events. [2024-06-27 17:52:36,707 INFO L125 PetriNetUnfolderBase]: For 308745/308779 co-relation queries the response was YES. [2024-06-27 17:52:36,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45456 conditions, 7527 events. 4407/7527 cut-off events. For 308745/308779 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 55133 event pairs, 1506 based on Foata normal form. 16/7248 useless extension candidates. Maximal degree in co-relation 45328. Up to 6319 conditions per place. [2024-06-27 17:52:36,786 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 220 selfloop transitions, 114 changer transitions 0/349 dead transitions. [2024-06-27 17:52:36,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 349 transitions, 4926 flow [2024-06-27 17:52:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 17:52:36,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-06-27 17:52:36,786 INFO L175 Difference]: Start difference. First operand has 277 places, 323 transitions, 4112 flow. Second operand 8 states and 222 transitions. [2024-06-27 17:52:36,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 349 transitions, 4926 flow [2024-06-27 17:52:37,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 349 transitions, 4738 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:37,754 INFO L231 Difference]: Finished difference. Result has 282 places, 325 transitions, 4222 flow [2024-06-27 17:52:37,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4222, PETRI_PLACES=282, PETRI_TRANSITIONS=325} [2024-06-27 17:52:37,754 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 232 predicate places. [2024-06-27 17:52:37,754 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 325 transitions, 4222 flow [2024-06-27 17:52:37,754 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 17:52:37,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:37,754 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 17:52:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:52:37,755 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 17:52:37,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash 546885697, now seen corresponding path program 3 times [2024-06-27 17:52:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:37,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771548105] [2024-06-27 17:52:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:37,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771548105] [2024-06-27 17:52:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771548105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:37,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:37,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:37,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209909732] [2024-06-27 17:52:37,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:37,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:37,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:37,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:37,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 325 transitions, 4222 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 17:52:37,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:37,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:37,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:38,924 INFO L124 PetriNetUnfolderBase]: 4638/7911 cut-off events. [2024-06-27 17:52:38,924 INFO L125 PetriNetUnfolderBase]: For 339123/339163 co-relation queries the response was YES. [2024-06-27 17:52:38,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48721 conditions, 7911 events. 4638/7911 cut-off events. For 339123/339163 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 58441 event pairs, 1523 based on Foata normal form. 12/7617 useless extension candidates. Maximal degree in co-relation 48591. Up to 6323 conditions per place. [2024-06-27 17:52:39,007 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 112 changer transitions 0/359 dead transitions. [2024-06-27 17:52:39,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 359 transitions, 5280 flow [2024-06-27 17:52:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:52:39,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 17:52:39,008 INFO L175 Difference]: Start difference. First operand has 282 places, 325 transitions, 4222 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:52:39,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 359 transitions, 5280 flow [2024-06-27 17:52:39,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 359 transitions, 5014 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:39,949 INFO L231 Difference]: Finished difference. Result has 285 places, 329 transitions, 4325 flow [2024-06-27 17:52:39,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4325, PETRI_PLACES=285, PETRI_TRANSITIONS=329} [2024-06-27 17:52:39,949 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-06-27 17:52:39,949 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 329 transitions, 4325 flow [2024-06-27 17:52:39,950 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 17:52:39,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:39,950 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 17:52:39,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:52:39,950 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 17:52:39,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash -173907459, now seen corresponding path program 4 times [2024-06-27 17:52:39,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:39,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577464639] [2024-06-27 17:52:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:39,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:40,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577464639] [2024-06-27 17:52:40,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577464639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:40,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:40,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:40,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174823804] [2024-06-27 17:52:40,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:40,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:40,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:40,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:40,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:40,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 329 transitions, 4325 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 17:52:40,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:40,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:40,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:41,380 INFO L124 PetriNetUnfolderBase]: 4786/8184 cut-off events. [2024-06-27 17:52:41,380 INFO L125 PetriNetUnfolderBase]: For 359735/359781 co-relation queries the response was YES. [2024-06-27 17:52:41,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50523 conditions, 8184 events. 4786/8184 cut-off events. For 359735/359781 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 60983 event pairs, 1651 based on Foata normal form. 16/7881 useless extension candidates. Maximal degree in co-relation 50391. Up to 7022 conditions per place. [2024-06-27 17:52:41,473 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 265 selfloop transitions, 72 changer transitions 0/352 dead transitions. [2024-06-27 17:52:41,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 352 transitions, 5143 flow [2024-06-27 17:52:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 17:52:41,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-06-27 17:52:41,474 INFO L175 Difference]: Start difference. First operand has 285 places, 329 transitions, 4325 flow. Second operand 8 states and 218 transitions. [2024-06-27 17:52:41,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 352 transitions, 5143 flow [2024-06-27 17:52:42,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 352 transitions, 4951 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:42,545 INFO L231 Difference]: Finished difference. Result has 289 places, 331 transitions, 4353 flow [2024-06-27 17:52:42,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4353, PETRI_PLACES=289, PETRI_TRANSITIONS=331} [2024-06-27 17:52:42,546 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 239 predicate places. [2024-06-27 17:52:42,546 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 331 transitions, 4353 flow [2024-06-27 17:52:42,546 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 17:52:42,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:42,546 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 17:52:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:52:42,546 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 17:52:42,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash -168545079, now seen corresponding path program 5 times [2024-06-27 17:52:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:42,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970664837] [2024-06-27 17:52:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970664837] [2024-06-27 17:52:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970664837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:42,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:42,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872023392] [2024-06-27 17:52:42,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:42,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:42,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:42,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:42,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:42,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 331 transitions, 4353 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 17:52:42,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:42,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:42,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:44,020 INFO L124 PetriNetUnfolderBase]: 4934/8417 cut-off events. [2024-06-27 17:52:44,020 INFO L125 PetriNetUnfolderBase]: For 377498/377553 co-relation queries the response was YES. [2024-06-27 17:52:44,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52281 conditions, 8417 events. 4934/8417 cut-off events. For 377498/377553 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 63070 event pairs, 1684 based on Foata normal form. 16/8098 useless extension candidates. Maximal degree in co-relation 52147. Up to 7250 conditions per place. [2024-06-27 17:52:44,097 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 263 selfloop transitions, 78 changer transitions 0/356 dead transitions. [2024-06-27 17:52:44,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 356 transitions, 5187 flow [2024-06-27 17:52:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 17:52:44,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739130434782609 [2024-06-27 17:52:44,098 INFO L175 Difference]: Start difference. First operand has 289 places, 331 transitions, 4353 flow. Second operand 10 states and 264 transitions. [2024-06-27 17:52:44,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 356 transitions, 5187 flow [2024-06-27 17:52:45,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 356 transitions, 4997 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:45,093 INFO L231 Difference]: Finished difference. Result has 293 places, 333 transitions, 4399 flow [2024-06-27 17:52:45,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4399, PETRI_PLACES=293, PETRI_TRANSITIONS=333} [2024-06-27 17:52:45,100 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 243 predicate places. [2024-06-27 17:52:45,100 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 333 transitions, 4399 flow [2024-06-27 17:52:45,100 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 17:52:45,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:45,100 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 17:52:45,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:52:45,101 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:45,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 868419079, now seen corresponding path program 6 times [2024-06-27 17:52:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:45,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887987379] [2024-06-27 17:52:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:45,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:45,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887987379] [2024-06-27 17:52:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887987379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:45,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:45,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134342080] [2024-06-27 17:52:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:45,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:45,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:45,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:45,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 333 transitions, 4399 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 17:52:45,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:45,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:46,540 INFO L124 PetriNetUnfolderBase]: 5165/8825 cut-off events. [2024-06-27 17:52:46,540 INFO L125 PetriNetUnfolderBase]: For 411365/411420 co-relation queries the response was YES. [2024-06-27 17:52:46,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55621 conditions, 8825 events. 5165/8825 cut-off events. For 411365/411420 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 66775 event pairs, 1717 based on Foata normal form. 12/8491 useless extension candidates. Maximal degree in co-relation 55486. Up to 7048 conditions per place. [2024-06-27 17:52:46,647 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 278 selfloop transitions, 71 changer transitions 0/364 dead transitions. [2024-06-27 17:52:46,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 364 transitions, 5485 flow [2024-06-27 17:52:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:52:46,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 17:52:46,648 INFO L175 Difference]: Start difference. First operand has 293 places, 333 transitions, 4399 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:52:46,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 364 transitions, 5485 flow [2024-06-27 17:52:47,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 364 transitions, 5279 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:47,906 INFO L231 Difference]: Finished difference. Result has 294 places, 337 transitions, 4504 flow [2024-06-27 17:52:47,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4504, PETRI_PLACES=294, PETRI_TRANSITIONS=337} [2024-06-27 17:52:47,907 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 244 predicate places. [2024-06-27 17:52:47,907 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 337 transitions, 4504 flow [2024-06-27 17:52:47,907 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 17:52:47,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:47,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:47,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:52:47,908 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 17:52:47,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:47,908 INFO L85 PathProgramCache]: Analyzing trace with hash 874144531, now seen corresponding path program 1 times [2024-06-27 17:52:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:47,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779393871] [2024-06-27 17:52:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:47,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:47,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:47,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779393871] [2024-06-27 17:52:47,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779393871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:47,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:47,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:47,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912878058] [2024-06-27 17:52:47,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:47,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:47,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:48,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:48,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 337 transitions, 4504 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 17:52:48,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:48,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:48,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:49,411 INFO L124 PetriNetUnfolderBase]: 5271/9033 cut-off events. [2024-06-27 17:52:49,411 INFO L125 PetriNetUnfolderBase]: For 424585/424643 co-relation queries the response was YES. [2024-06-27 17:52:49,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56752 conditions, 9033 events. 5271/9033 cut-off events. For 424585/424643 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 68798 event pairs, 1774 based on Foata normal form. 12/8698 useless extension candidates. Maximal degree in co-relation 56615. Up to 7459 conditions per place. [2024-06-27 17:52:49,520 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 267 selfloop transitions, 85 changer transitions 0/367 dead transitions. [2024-06-27 17:52:49,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 367 transitions, 5388 flow [2024-06-27 17:52:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-27 17:52:49,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826086956521739 [2024-06-27 17:52:49,521 INFO L175 Difference]: Start difference. First operand has 294 places, 337 transitions, 4504 flow. Second operand 10 states and 268 transitions. [2024-06-27 17:52:49,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 367 transitions, 5388 flow [2024-06-27 17:52:50,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 367 transitions, 5232 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:50,867 INFO L231 Difference]: Finished difference. Result has 300 places, 339 transitions, 4597 flow [2024-06-27 17:52:50,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4597, PETRI_PLACES=300, PETRI_TRANSITIONS=339} [2024-06-27 17:52:50,867 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 250 predicate places. [2024-06-27 17:52:50,868 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 339 transitions, 4597 flow [2024-06-27 17:52:50,868 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 17:52:50,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:50,868 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 17:52:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:52:50,868 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 17:52:50,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash -978323173, now seen corresponding path program 7 times [2024-06-27 17:52:50,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:50,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561500614] [2024-06-27 17:52:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:50,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:50,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:50,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561500614] [2024-06-27 17:52:50,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561500614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:50,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:50,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328682689] [2024-06-27 17:52:50,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:51,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:51,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 339 transitions, 4597 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 17:52:51,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:51,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:51,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:52,512 INFO L124 PetriNetUnfolderBase]: 5419/9253 cut-off events. [2024-06-27 17:52:52,512 INFO L125 PetriNetUnfolderBase]: For 451303/451391 co-relation queries the response was YES. [2024-06-27 17:52:52,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58661 conditions, 9253 events. 5419/9253 cut-off events. For 451303/451391 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 70864 event pairs, 1884 based on Foata normal form. 31/8918 useless extension candidates. Maximal degree in co-relation 58522. Up to 7913 conditions per place. [2024-06-27 17:52:52,607 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 228 selfloop transitions, 120 changer transitions 0/363 dead transitions. [2024-06-27 17:52:52,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 363 transitions, 5453 flow [2024-06-27 17:52:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 17:52:52,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821256038647343 [2024-06-27 17:52:52,608 INFO L175 Difference]: Start difference. First operand has 300 places, 339 transitions, 4597 flow. Second operand 9 states and 241 transitions. [2024-06-27 17:52:52,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 363 transitions, 5453 flow [2024-06-27 17:52:53,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 363 transitions, 5228 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:53,814 INFO L231 Difference]: Finished difference. Result has 301 places, 341 transitions, 4702 flow [2024-06-27 17:52:53,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=301, PETRI_TRANSITIONS=341} [2024-06-27 17:52:53,814 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 251 predicate places. [2024-06-27 17:52:53,814 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 341 transitions, 4702 flow [2024-06-27 17:52:53,814 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 17:52:53,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:53,814 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 17:52:53,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:52:53,815 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 17:52:53,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:53,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2031654509, now seen corresponding path program 8 times [2024-06-27 17:52:53,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:53,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2701465] [2024-06-27 17:52:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:53,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:53,898 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 17:52:53,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:53,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2701465] [2024-06-27 17:52:53,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2701465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:53,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:53,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:53,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177790158] [2024-06-27 17:52:53,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:53,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:53,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:53,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:53,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:53,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 341 transitions, 4702 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 17:52:53,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:53,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:53,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:55,520 INFO L124 PetriNetUnfolderBase]: 5567/9483 cut-off events. [2024-06-27 17:52:55,520 INFO L125 PetriNetUnfolderBase]: For 470867/470943 co-relation queries the response was YES. [2024-06-27 17:52:55,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 9483 events. 5567/9483 cut-off events. For 470867/470943 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 72795 event pairs, 1900 based on Foata normal form. 16/9118 useless extension candidates. Maximal degree in co-relation 60324. Up to 7981 conditions per place. [2024-06-27 17:52:55,608 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 121 changer transitions 0/368 dead transitions. [2024-06-27 17:52:55,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 368 transitions, 5580 flow [2024-06-27 17:52:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 17:52:55,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-06-27 17:52:55,609 INFO L175 Difference]: Start difference. First operand has 301 places, 341 transitions, 4702 flow. Second operand 9 states and 244 transitions. [2024-06-27 17:52:55,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 368 transitions, 5580 flow [2024-06-27 17:52:56,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 368 transitions, 5280 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:56,748 INFO L231 Difference]: Finished difference. Result has 303 places, 343 transitions, 4742 flow [2024-06-27 17:52:56,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4742, PETRI_PLACES=303, PETRI_TRANSITIONS=343} [2024-06-27 17:52:56,749 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-06-27 17:52:56,749 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 343 transitions, 4742 flow [2024-06-27 17:52:56,749 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 17:52:56,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:56,749 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 17:52:56,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:52:56,749 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 17:52:56,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2037016889, now seen corresponding path program 9 times [2024-06-27 17:52:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:56,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005970010] [2024-06-27 17:52:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:56,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:56,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005970010] [2024-06-27 17:52:56,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005970010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:56,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:56,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:56,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370135402] [2024-06-27 17:52:56,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:56,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:56,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:56,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:56,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 343 transitions, 4742 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 17:52:56,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:56,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:56,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:58,269 INFO L124 PetriNetUnfolderBase]: 5689/9698 cut-off events. [2024-06-27 17:52:58,269 INFO L125 PetriNetUnfolderBase]: For 479265/479329 co-relation queries the response was YES. [2024-06-27 17:52:58,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61538 conditions, 9698 events. 5689/9698 cut-off events. For 479265/479329 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 74818 event pairs, 1957 based on Foata normal form. 16/9329 useless extension candidates. Maximal degree in co-relation 61397. Up to 8171 conditions per place. [2024-06-27 17:52:58,378 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 244 selfloop transitions, 109 changer transitions 0/368 dead transitions. [2024-06-27 17:52:58,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 368 transitions, 5620 flow [2024-06-27 17:52:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:52:58,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-27 17:52:58,379 INFO L175 Difference]: Start difference. First operand has 303 places, 343 transitions, 4742 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:52:58,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 368 transitions, 5620 flow [2024-06-27 17:53:00,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 368 transitions, 5324 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:00,340 INFO L231 Difference]: Finished difference. Result has 303 places, 345 transitions, 4766 flow [2024-06-27 17:53:00,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4766, PETRI_PLACES=303, PETRI_TRANSITIONS=345} [2024-06-27 17:53:00,341 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-06-27 17:53:00,341 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 345 transitions, 4766 flow [2024-06-27 17:53:00,341 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 17:53:00,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:00,341 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 17:53:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:53:00,341 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 17:53:00,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2037164759, now seen corresponding path program 10 times [2024-06-27 17:53:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:00,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278096665] [2024-06-27 17:53:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278096665] [2024-06-27 17:53:00,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278096665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:00,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232257720] [2024-06-27 17:53:00,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:00,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:00,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:00,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 345 transitions, 4766 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 17:53:00,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:00,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:00,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:02,181 INFO L124 PetriNetUnfolderBase]: 5736/9782 cut-off events. [2024-06-27 17:53:02,181 INFO L125 PetriNetUnfolderBase]: For 453396/453457 co-relation queries the response was YES. [2024-06-27 17:53:02,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60970 conditions, 9782 events. 5736/9782 cut-off events. For 453396/453457 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 75459 event pairs, 1607 based on Foata normal form. 12/9423 useless extension candidates. Maximal degree in co-relation 60828. Up to 6784 conditions per place. [2024-06-27 17:53:02,286 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 248 selfloop transitions, 117 changer transitions 0/380 dead transitions. [2024-06-27 17:53:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 380 transitions, 5898 flow [2024-06-27 17:53:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:53:02,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:53:02,287 INFO L175 Difference]: Start difference. First operand has 303 places, 345 transitions, 4766 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:53:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 380 transitions, 5898 flow [2024-06-27 17:53:03,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 380 transitions, 5622 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:03,790 INFO L231 Difference]: Finished difference. Result has 306 places, 348 transitions, 4919 flow [2024-06-27 17:53:03,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4490, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4919, PETRI_PLACES=306, PETRI_TRANSITIONS=348} [2024-06-27 17:53:03,790 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 256 predicate places. [2024-06-27 17:53:03,790 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 348 transitions, 4919 flow [2024-06-27 17:53:03,790 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 17:53:03,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:03,791 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 17:53:03,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:53:03,791 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 17:53:03,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash 738529047, now seen corresponding path program 2 times [2024-06-27 17:53:03,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:03,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728931501] [2024-06-27 17:53:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:03,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:03,874 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 17:53:03,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:03,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728931501] [2024-06-27 17:53:03,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728931501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:03,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:03,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:03,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052217757] [2024-06-27 17:53:03,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:03,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:03,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:03,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:03,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:03,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 348 transitions, 4919 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 17:53:03,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:03,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:03,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:05,821 INFO L124 PetriNetUnfolderBase]: 5842/9986 cut-off events. [2024-06-27 17:53:05,822 INFO L125 PetriNetUnfolderBase]: For 465746/465843 co-relation queries the response was YES. [2024-06-27 17:53:05,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62611 conditions, 9986 events. 5842/9986 cut-off events. For 465746/465843 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 77872 event pairs, 1999 based on Foata normal form. 27/9624 useless extension candidates. Maximal degree in co-relation 62467. Up to 8420 conditions per place. [2024-06-27 17:53:05,921 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 238 selfloop transitions, 125 changer transitions 0/378 dead transitions. [2024-06-27 17:53:05,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 378 transitions, 5837 flow [2024-06-27 17:53:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-27 17:53:05,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826086956521739 [2024-06-27 17:53:05,922 INFO L175 Difference]: Start difference. First operand has 306 places, 348 transitions, 4919 flow. Second operand 10 states and 268 transitions. [2024-06-27 17:53:05,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 378 transitions, 5837 flow [2024-06-27 17:53:07,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 378 transitions, 5427 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:07,529 INFO L231 Difference]: Finished difference. Result has 310 places, 350 transitions, 4850 flow [2024-06-27 17:53:07,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4850, PETRI_PLACES=310, PETRI_TRANSITIONS=350} [2024-06-27 17:53:07,529 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 260 predicate places. [2024-06-27 17:53:07,530 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 350 transitions, 4850 flow [2024-06-27 17:53:07,530 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 17:53:07,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:07,530 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 17:53:07,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:53:07,530 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 17:53:07,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2031439307, now seen corresponding path program 3 times [2024-06-27 17:53:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:07,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663384343] [2024-06-27 17:53:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:07,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:07,604 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 17:53:07,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663384343] [2024-06-27 17:53:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663384343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:07,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:07,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584568872] [2024-06-27 17:53:07,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:07,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:07,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:07,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:07,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 350 transitions, 4850 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 17:53:07,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:07,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:07,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:09,544 INFO L124 PetriNetUnfolderBase]: 5948/10234 cut-off events. [2024-06-27 17:53:09,544 INFO L125 PetriNetUnfolderBase]: For 456149/456216 co-relation queries the response was YES. [2024-06-27 17:53:09,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62299 conditions, 10234 events. 5948/10234 cut-off events. For 456149/456216 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 80055 event pairs, 2003 based on Foata normal form. 12/9863 useless extension candidates. Maximal degree in co-relation 62155. Up to 7952 conditions per place. [2024-06-27 17:53:09,644 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 135 changer transitions 0/382 dead transitions. [2024-06-27 17:53:09,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 382 transitions, 5784 flow [2024-06-27 17:53:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 17:53:09,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990338164251208 [2024-06-27 17:53:09,645 INFO L175 Difference]: Start difference. First operand has 310 places, 350 transitions, 4850 flow. Second operand 9 states and 248 transitions. [2024-06-27 17:53:09,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 382 transitions, 5784 flow [2024-06-27 17:53:11,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 382 transitions, 5469 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:11,351 INFO L231 Difference]: Finished difference. Result has 311 places, 352 transitions, 4901 flow [2024-06-27 17:53:11,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4901, PETRI_PLACES=311, PETRI_TRANSITIONS=352} [2024-06-27 17:53:11,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 261 predicate places. [2024-06-27 17:53:11,352 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 352 transitions, 4901 flow [2024-06-27 17:53:11,352 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 17:53:11,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:11,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:53:11,353 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 17:53:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1004226327, now seen corresponding path program 4 times [2024-06-27 17:53:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331542379] [2024-06-27 17:53:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:11,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:11,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331542379] [2024-06-27 17:53:11,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331542379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:11,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:11,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090635908] [2024-06-27 17:53:11,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:11,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:11,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:11,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:11,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 352 transitions, 4901 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 17:53:11,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:11,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:11,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:13,273 INFO L124 PetriNetUnfolderBase]: 5988/10306 cut-off events. [2024-06-27 17:53:13,274 INFO L125 PetriNetUnfolderBase]: For 442049/442133 co-relation queries the response was YES. [2024-06-27 17:53:13,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61967 conditions, 10306 events. 5988/10306 cut-off events. For 442049/442133 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 81118 event pairs, 2011 based on Foata normal form. 27/9946 useless extension candidates. Maximal degree in co-relation 61822. Up to 7506 conditions per place. [2024-06-27 17:53:13,534 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 221 selfloop transitions, 147 changer transitions 0/383 dead transitions. [2024-06-27 17:53:13,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 383 transitions, 5785 flow [2024-06-27 17:53:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 17:53:13,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990338164251208 [2024-06-27 17:53:13,536 INFO L175 Difference]: Start difference. First operand has 311 places, 352 transitions, 4901 flow. Second operand 9 states and 248 transitions. [2024-06-27 17:53:13,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 383 transitions, 5785 flow [2024-06-27 17:53:15,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 383 transitions, 5445 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:15,290 INFO L231 Difference]: Finished difference. Result has 313 places, 353 transitions, 4892 flow [2024-06-27 17:53:15,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4892, PETRI_PLACES=313, PETRI_TRANSITIONS=353} [2024-06-27 17:53:15,290 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-06-27 17:53:15,290 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 353 transitions, 4892 flow [2024-06-27 17:53:15,291 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 17:53:15,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:15,291 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 17:53:15,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:53:15,291 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 17:53:15,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1409495793, now seen corresponding path program 1 times [2024-06-27 17:53:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:15,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810228025] [2024-06-27 17:53:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:15,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:15,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:15,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810228025] [2024-06-27 17:53:15,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810228025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:15,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:15,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:15,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518272250] [2024-06-27 17:53:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:15,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:15,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:15,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:15,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:15,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 353 transitions, 4892 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 17:53:15,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:15,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:15,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:17,258 INFO L124 PetriNetUnfolderBase]: 6016/10286 cut-off events. [2024-06-27 17:53:17,258 INFO L125 PetriNetUnfolderBase]: For 401178/401259 co-relation queries the response was YES. [2024-06-27 17:53:17,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61686 conditions, 10286 events. 6016/10286 cut-off events. For 401178/401259 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 80611 event pairs, 2098 based on Foata normal form. 3/9884 useless extension candidates. Maximal degree in co-relation 61540. Up to 9150 conditions per place. [2024-06-27 17:53:17,373 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 334 selfloop transitions, 42 changer transitions 0/391 dead transitions. [2024-06-27 17:53:17,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 391 transitions, 6038 flow [2024-06-27 17:53:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 17:53:17,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 17:53:17,374 INFO L175 Difference]: Start difference. First operand has 313 places, 353 transitions, 4892 flow. Second operand 8 states and 230 transitions. [2024-06-27 17:53:17,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 391 transitions, 6038 flow [2024-06-27 17:53:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 391 transitions, 5588 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:19,233 INFO L231 Difference]: Finished difference. Result has 313 places, 360 transitions, 4709 flow [2024-06-27 17:53:19,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4709, PETRI_PLACES=313, PETRI_TRANSITIONS=360} [2024-06-27 17:53:19,234 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-06-27 17:53:19,234 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 360 transitions, 4709 flow [2024-06-27 17:53:19,234 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 17:53:19,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:19,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:19,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:53:19,235 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 17:53:19,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash 867424755, now seen corresponding path program 1 times [2024-06-27 17:53:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146867712] [2024-06-27 17:53:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:19,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:19,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146867712] [2024-06-27 17:53:19,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146867712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:19,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:19,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:19,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273367530] [2024-06-27 17:53:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:19,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:19,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 360 transitions, 4709 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:19,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:19,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:19,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:21,103 INFO L124 PetriNetUnfolderBase]: 6039/10299 cut-off events. [2024-06-27 17:53:21,103 INFO L125 PetriNetUnfolderBase]: For 396739/396834 co-relation queries the response was YES. [2024-06-27 17:53:21,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59753 conditions, 10299 events. 6039/10299 cut-off events. For 396739/396834 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 80539 event pairs, 2109 based on Foata normal form. 12/9900 useless extension candidates. Maximal degree in co-relation 59607. Up to 9102 conditions per place. [2024-06-27 17:53:21,207 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 297 selfloop transitions, 71 changer transitions 0/383 dead transitions. [2024-06-27 17:53:21,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 383 transitions, 5743 flow [2024-06-27 17:53:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:53:21,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-06-27 17:53:21,207 INFO L175 Difference]: Start difference. First operand has 313 places, 360 transitions, 4709 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:53:21,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 383 transitions, 5743 flow [2024-06-27 17:53:22,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 383 transitions, 5587 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:22,751 INFO L231 Difference]: Finished difference. Result has 316 places, 369 transitions, 4849 flow [2024-06-27 17:53:22,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4849, PETRI_PLACES=316, PETRI_TRANSITIONS=369} [2024-06-27 17:53:22,751 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 266 predicate places. [2024-06-27 17:53:22,752 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 369 transitions, 4849 flow [2024-06-27 17:53:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:22,752 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 17:53:22,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:53:22,752 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 17:53:22,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2020951581, now seen corresponding path program 2 times [2024-06-27 17:53:22,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:22,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9558035] [2024-06-27 17:53:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:22,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:22,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9558035] [2024-06-27 17:53:22,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9558035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:22,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:22,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:22,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694365482] [2024-06-27 17:53:22,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:22,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:22,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:23,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:23,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 369 transitions, 4849 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 17:53:23,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:23,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:23,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:24,964 INFO L124 PetriNetUnfolderBase]: 6046/10316 cut-off events. [2024-06-27 17:53:24,964 INFO L125 PetriNetUnfolderBase]: For 381007/381088 co-relation queries the response was YES. [2024-06-27 17:53:25,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59756 conditions, 10316 events. 6046/10316 cut-off events. For 381007/381088 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 80702 event pairs, 2090 based on Foata normal form. 3/9907 useless extension candidates. Maximal degree in co-relation 59607. Up to 9205 conditions per place. [2024-06-27 17:53:25,066 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 345 selfloop transitions, 39 changer transitions 0/399 dead transitions. [2024-06-27 17:53:25,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 399 transitions, 5734 flow [2024-06-27 17:53:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 17:53:25,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:53:25,067 INFO L175 Difference]: Start difference. First operand has 316 places, 369 transitions, 4849 flow. Second operand 8 states and 224 transitions. [2024-06-27 17:53:25,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 399 transitions, 5734 flow [2024-06-27 17:53:26,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 399 transitions, 5705 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 17:53:26,301 INFO L231 Difference]: Finished difference. Result has 323 places, 372 transitions, 4959 flow [2024-06-27 17:53:26,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4959, PETRI_PLACES=323, PETRI_TRANSITIONS=372} [2024-06-27 17:53:26,301 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-06-27 17:53:26,301 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 372 transitions, 4959 flow [2024-06-27 17:53:26,301 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 17:53:26,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:26,302 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 17:53:26,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:53:26,302 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 17:53:26,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1193931613, now seen corresponding path program 2 times [2024-06-27 17:53:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734890081] [2024-06-27 17:53:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:26,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:26,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:26,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734890081] [2024-06-27 17:53:26,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734890081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:26,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:26,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:26,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022461618] [2024-06-27 17:53:26,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:26,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:26,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:26,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:26,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 372 transitions, 4959 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:26,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:26,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:26,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:28,226 INFO L124 PetriNetUnfolderBase]: 6053/10321 cut-off events. [2024-06-27 17:53:28,226 INFO L125 PetriNetUnfolderBase]: For 389337/389432 co-relation queries the response was YES. [2024-06-27 17:53:28,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60070 conditions, 10321 events. 6053/10321 cut-off events. For 389337/389432 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 80719 event pairs, 2109 based on Foata normal form. 12/9918 useless extension candidates. Maximal degree in co-relation 59919. Up to 9119 conditions per place. [2024-06-27 17:53:28,346 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 297 selfloop transitions, 76 changer transitions 0/388 dead transitions. [2024-06-27 17:53:28,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 388 transitions, 5934 flow [2024-06-27 17:53:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 17:53:28,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-06-27 17:53:28,347 INFO L175 Difference]: Start difference. First operand has 323 places, 372 transitions, 4959 flow. Second operand 5 states and 147 transitions. [2024-06-27 17:53:28,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 388 transitions, 5934 flow [2024-06-27 17:53:30,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 388 transitions, 5794 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:30,096 INFO L231 Difference]: Finished difference. Result has 321 places, 375 transitions, 5038 flow [2024-06-27 17:53:30,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4819, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5038, PETRI_PLACES=321, PETRI_TRANSITIONS=375} [2024-06-27 17:53:30,096 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 271 predicate places. [2024-06-27 17:53:30,096 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 375 transitions, 5038 flow [2024-06-27 17:53:30,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:30,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:30,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:30,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:53:30,097 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 17:53:30,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1336618265, now seen corresponding path program 3 times [2024-06-27 17:53:30,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452690934] [2024-06-27 17:53:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:30,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452690934] [2024-06-27 17:53:30,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452690934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:30,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:30,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264001721] [2024-06-27 17:53:30,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:30,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:30,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:30,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:30,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 375 transitions, 5038 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:30,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:30,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:30,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:32,015 INFO L124 PetriNetUnfolderBase]: 6050/10317 cut-off events. [2024-06-27 17:53:32,015 INFO L125 PetriNetUnfolderBase]: For 394135/394230 co-relation queries the response was YES. [2024-06-27 17:53:32,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60147 conditions, 10317 events. 6050/10317 cut-off events. For 394135/394230 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 80626 event pairs, 2106 based on Foata normal form. 16/9918 useless extension candidates. Maximal degree in co-relation 59996. Up to 9116 conditions per place. [2024-06-27 17:53:32,122 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 292 selfloop transitions, 82 changer transitions 0/389 dead transitions. [2024-06-27 17:53:32,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 389 transitions, 5820 flow [2024-06-27 17:53:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:53:32,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-27 17:53:32,123 INFO L175 Difference]: Start difference. First operand has 321 places, 375 transitions, 5038 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:53:32,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 389 transitions, 5820 flow [2024-06-27 17:53:33,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 389 transitions, 5708 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:33,869 INFO L231 Difference]: Finished difference. Result has 324 places, 375 transitions, 5101 flow [2024-06-27 17:53:33,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5101, PETRI_PLACES=324, PETRI_TRANSITIONS=375} [2024-06-27 17:53:33,869 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 274 predicate places. [2024-06-27 17:53:33,869 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 375 transitions, 5101 flow [2024-06-27 17:53:33,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:33,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:33,870 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 17:53:33,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:53:33,870 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 17:53:33,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1336380929, now seen corresponding path program 3 times [2024-06-27 17:53:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990347062] [2024-06-27 17:53:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:33,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:33,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:33,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990347062] [2024-06-27 17:53:33,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990347062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:33,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:33,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:33,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652719734] [2024-06-27 17:53:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:33,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:33,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:33,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:33,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:33,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 375 transitions, 5101 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 17:53:33,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:33,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:33,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:35,987 INFO L124 PetriNetUnfolderBase]: 6069/10355 cut-off events. [2024-06-27 17:53:35,987 INFO L125 PetriNetUnfolderBase]: For 386668/386753 co-relation queries the response was YES. [2024-06-27 17:53:36,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60319 conditions, 10355 events. 6069/10355 cut-off events. For 386668/386753 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 81039 event pairs, 2097 based on Foata normal form. 7/9946 useless extension candidates. Maximal degree in co-relation 60169. Up to 9226 conditions per place. [2024-06-27 17:53:36,099 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 350 selfloop transitions, 49 changer transitions 0/414 dead transitions. [2024-06-27 17:53:36,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 414 transitions, 6120 flow [2024-06-27 17:53:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 290 transitions. [2024-06-27 17:53:36,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5731225296442688 [2024-06-27 17:53:36,100 INFO L175 Difference]: Start difference. First operand has 324 places, 375 transitions, 5101 flow. Second operand 11 states and 290 transitions. [2024-06-27 17:53:36,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 414 transitions, 6120 flow [2024-06-27 17:53:37,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 414 transitions, 5878 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:37,392 INFO L231 Difference]: Finished difference. Result has 328 places, 384 transitions, 5116 flow [2024-06-27 17:53:37,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5116, PETRI_PLACES=328, PETRI_TRANSITIONS=384} [2024-06-27 17:53:37,393 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 278 predicate places. [2024-06-27 17:53:37,393 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 384 transitions, 5116 flow [2024-06-27 17:53:37,393 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 17:53:37,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:37,393 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 17:53:37,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:53:37,393 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 17:53:37,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1017292287, now seen corresponding path program 1 times [2024-06-27 17:53:37,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:37,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715615389] [2024-06-27 17:53:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715615389] [2024-06-27 17:53:37,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715615389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:37,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:37,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264186847] [2024-06-27 17:53:37,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:37,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:37,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:37,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 384 transitions, 5116 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:37,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:37,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:37,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:39,419 INFO L124 PetriNetUnfolderBase]: 6143/10585 cut-off events. [2024-06-27 17:53:39,419 INFO L125 PetriNetUnfolderBase]: For 404326/404411 co-relation queries the response was YES. [2024-06-27 17:53:39,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60829 conditions, 10585 events. 6143/10585 cut-off events. For 404326/404411 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 83419 event pairs, 1874 based on Foata normal form. 15/10183 useless extension candidates. Maximal degree in co-relation 60679. Up to 8793 conditions per place. [2024-06-27 17:53:39,535 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 371 selfloop transitions, 30 changer transitions 0/416 dead transitions. [2024-06-27 17:53:39,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 416 transitions, 6247 flow [2024-06-27 17:53:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:53:39,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-06-27 17:53:39,536 INFO L175 Difference]: Start difference. First operand has 328 places, 384 transitions, 5116 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:53:39,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 416 transitions, 6247 flow [2024-06-27 17:53:41,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 416 transitions, 6115 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:41,089 INFO L231 Difference]: Finished difference. Result has 328 places, 387 transitions, 5086 flow [2024-06-27 17:53:41,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5086, PETRI_PLACES=328, PETRI_TRANSITIONS=387} [2024-06-27 17:53:41,090 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 278 predicate places. [2024-06-27 17:53:41,090 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 387 transitions, 5086 flow [2024-06-27 17:53:41,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:41,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:41,091 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 17:53:41,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:53:41,091 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 17:53:41,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:41,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1862662423, now seen corresponding path program 2 times [2024-06-27 17:53:41,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:41,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337272703] [2024-06-27 17:53:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:41,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:41,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:41,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337272703] [2024-06-27 17:53:41,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337272703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:41,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:41,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:41,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822444042] [2024-06-27 17:53:41,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:41,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:41,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:41,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:41,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 387 transitions, 5086 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:41,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:41,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:41,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:43,134 INFO L124 PetriNetUnfolderBase]: 6130/10591 cut-off events. [2024-06-27 17:53:43,134 INFO L125 PetriNetUnfolderBase]: For 394019/394101 co-relation queries the response was YES. [2024-06-27 17:53:43,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60616 conditions, 10591 events. 6130/10591 cut-off events. For 394019/394101 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 83749 event pairs, 1876 based on Foata normal form. 15/10191 useless extension candidates. Maximal degree in co-relation 60464. Up to 8787 conditions per place. [2024-06-27 17:53:43,244 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 366 selfloop transitions, 30 changer transitions 0/411 dead transitions. [2024-06-27 17:53:43,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 411 transitions, 6004 flow [2024-06-27 17:53:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:53:43,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:53:43,244 INFO L175 Difference]: Start difference. First operand has 328 places, 387 transitions, 5086 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:53:43,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 411 transitions, 6004 flow [2024-06-27 17:53:44,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 411 transitions, 5937 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:44,878 INFO L231 Difference]: Finished difference. Result has 330 places, 387 transitions, 5085 flow [2024-06-27 17:53:44,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5019, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5085, PETRI_PLACES=330, PETRI_TRANSITIONS=387} [2024-06-27 17:53:44,878 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 280 predicate places. [2024-06-27 17:53:44,878 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 387 transitions, 5085 flow [2024-06-27 17:53:44,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:44,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:44,878 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 17:53:44,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:53:44,879 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 17:53:44,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 262857123, now seen corresponding path program 4 times [2024-06-27 17:53:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:44,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965067938] [2024-06-27 17:53:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:44,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965067938] [2024-06-27 17:53:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965067938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:44,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:44,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750745467] [2024-06-27 17:53:44,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:44,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:44,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 387 transitions, 5085 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 17:53:44,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:44,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:44,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand