./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe003_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/safe003_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe003_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 17:49:21,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:49:21,513 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:49:21,517 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:49:21,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:49:21,549 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:49:21,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:49:21,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:49:21,550 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:49:21,550 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:49:21,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:49:21,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:49:21,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:49:21,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:49:21,556 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:49:21,556 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:49:21,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:49:21,557 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:49:21,557 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:49:21,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:49:21,558 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:49:21,558 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:49:21,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:49:21,559 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:49:21,559 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:49:21,559 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:49:21,559 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:49:21,559 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:49:21,560 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:49:21,560 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:49:21,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:49:21,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:49:21,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:21,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:49:21,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:49:21,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:49:21,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:49:21,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:49:21,562 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:49:21,562 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:49:21,562 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:49:21,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:49:21,563 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:49:21,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:49:21,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:49:21,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:49:21,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:49:21,765 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:49:21,765 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:49:21,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe003_tso.yml/witness.yml [2024-06-27 17:49:21,853 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:49:21,853 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:49:21,853 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-27 17:49:22,907 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:49:23,115 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:49:23,115 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-27 17:49:23,126 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68676749/28f69138a603458899d217c0932b229a/FLAG4a07aa50f [2024-06-27 17:49:23,138 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68676749/28f69138a603458899d217c0932b229a [2024-06-27 17:49:23,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:49:23,140 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:49:23,142 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:23,142 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:49:23,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:49:23,147 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:21" (1/2) ... [2024-06-27 17:49:23,147 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c58ce21 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:23, skipping insertion in model container [2024-06-27 17:49:23,148 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:21" (1/2) ... [2024-06-27 17:49:23,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@556ef89f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:23, skipping insertion in model container [2024-06-27 17:49:23,149 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:23" (2/2) ... [2024-06-27 17:49:23,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c58ce21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23, skipping insertion in model container [2024-06-27 17:49:23,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:23" (2/2) ... [2024-06-27 17:49:23,150 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:49:23,188 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:49:23,189 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:49:23,190 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:49:23,190 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:49:23,190 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:49:23,190 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 17:49:23,227 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:49:23,382 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/safe003_tso.i[945,958] [2024-06-27 17:49:23,525 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:23,533 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:49:23,563 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/safe003_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:49:23,623 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:23,652 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:49:23,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23 WrapperNode [2024-06-27 17:49:23,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:23,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:23,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:49:23,654 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:49:23,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,714 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 17:49:23,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:23,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:49:23,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:49:23,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:49:23,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,728 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,748 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 17:49:23,748 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,762 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,766 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,771 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:49:23,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:49:23,774 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:49:23,774 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:49:23,775 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (1/1) ... [2024-06-27 17:49:23,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:49:23,801 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 17:49:23,820 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 17:49:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:49:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:49:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:49:23,834 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:49:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:49:23,834 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:49:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:49:23,834 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:49:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:49:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:49:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:49:23,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:49:23,836 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 17:49:23,968 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:49:23,970 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:49:24,109 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:49:24,109 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:49:24,204 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:49:24,204 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:49:24,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:24 BoogieIcfgContainer [2024-06-27 17:49:24,205 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:49:24,206 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:49:24,206 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:49:24,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:49:24,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:21" (1/4) ... [2024-06-27 17:49:24,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39466491 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:49:24, skipping insertion in model container [2024-06-27 17:49:24,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:49:23" (2/4) ... [2024-06-27 17:49:24,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39466491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:24, skipping insertion in model container [2024-06-27 17:49:24,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:23" (3/4) ... [2024-06-27 17:49:24,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39466491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:24, skipping insertion in model container [2024-06-27 17:49:24,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:24" (4/4) ... [2024-06-27 17:49:24,214 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_tso.i [2024-06-27 17:49:24,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:49:24,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:49:24,228 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:49:24,272 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:49:24,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:49:24,340 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-27 17:49:24,342 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:24,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-27 17:49:24,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:49:24,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-27 17:49:24,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:49:24,368 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;@57c3269c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:49:24,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:49:24,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:49:24,372 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:49:24,372 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:24,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:24,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:49:24,374 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 17:49:24,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash 210327718, now seen corresponding path program 1 times [2024-06-27 17:49:24,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:24,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201325222] [2024-06-27 17:49:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:24,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:24,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:24,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201325222] [2024-06-27 17:49:24,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201325222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:24,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:24,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954503622] [2024-06-27 17:49:24,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:24,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 17:49:24,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 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 17:49:24,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:24,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 17:49:24,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:24,968 INFO L124 PetriNetUnfolderBase]: 740/1302 cut-off events. [2024-06-27 17:49:24,968 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-27 17:49:24,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 1302 events. 740/1302 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7394 event pairs, 524 based on Foata normal form. 1/1242 useless extension candidates. Maximal degree in co-relation 2485. Up to 1128 conditions per place. [2024-06-27 17:49:24,979 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 31 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-27 17:49:24,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 187 flow [2024-06-27 17:49:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-27 17:49:24,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2024-06-27 17:49:24,991 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 98 transitions. [2024-06-27 17:49:24,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 187 flow [2024-06-27 17:49:24,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:24,998 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-27 17:49:24,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 17:49:25,003 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-27 17:49:25,004 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-27 17:49:25,004 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 17:49:25,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:25,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:49:25,005 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 17:49:25,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 262436515, now seen corresponding path program 1 times [2024-06-27 17:49:25,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:25,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677482215] [2024-06-27 17:49:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:25,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677482215] [2024-06-27 17:49:25,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677482215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:25,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:25,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:49:25,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128570504] [2024-06-27 17:49:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:25,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:25,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:25,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:25,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:25,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:25,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:25,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:25,379 INFO L124 PetriNetUnfolderBase]: 1218/2132 cut-off events. [2024-06-27 17:49:25,379 INFO L125 PetriNetUnfolderBase]: For 374/378 co-relation queries the response was YES. [2024-06-27 17:49:25,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 2132 events. 1218/2132 cut-off events. For 374/378 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12539 event pairs, 746 based on Foata normal form. 7/2110 useless extension candidates. Maximal degree in co-relation 4506. Up to 1746 conditions per place. [2024-06-27 17:49:25,391 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 48 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-27 17:49:25,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 312 flow [2024-06-27 17:49:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-27 17:49:25,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-06-27 17:49:25,396 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 129 transitions. [2024-06-27 17:49:25,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 312 flow [2024-06-27 17:49:25,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:25,399 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 185 flow [2024-06-27 17:49:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-06-27 17:49:25,400 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-27 17:49:25,400 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 185 flow [2024-06-27 17:49:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:25,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:25,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:49:25,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:25,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash -454402221, now seen corresponding path program 1 times [2024-06-27 17:49:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:25,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357069291] [2024-06-27 17:49:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:25,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:25,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:25,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357069291] [2024-06-27 17:49:25,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357069291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:25,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:25,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:25,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14998118] [2024-06-27 17:49:25,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:25,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:25,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:25,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:25,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:25,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:25,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:25,782 INFO L124 PetriNetUnfolderBase]: 1532/2446 cut-off events. [2024-06-27 17:49:25,782 INFO L125 PetriNetUnfolderBase]: For 1386/1386 co-relation queries the response was YES. [2024-06-27 17:49:25,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6288 conditions, 2446 events. 1532/2446 cut-off events. For 1386/1386 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13643 event pairs, 528 based on Foata normal form. 3/2445 useless extension candidates. Maximal degree in co-relation 6273. Up to 2222 conditions per place. [2024-06-27 17:49:25,793 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 64 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-06-27 17:49:25,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 434 flow [2024-06-27 17:49:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:49:25,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:49:25,797 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 185 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:49:25,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 434 flow [2024-06-27 17:49:25,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 432 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:25,803 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 270 flow [2024-06-27 17:49:25,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-27 17:49:25,804 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2024-06-27 17:49:25,804 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 270 flow [2024-06-27 17:49:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:25,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:25,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:25,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:49:25,805 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 17:49:25,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1166911888, now seen corresponding path program 1 times [2024-06-27 17:49:25,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:25,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998360718] [2024-06-27 17:49:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:25,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:25,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998360718] [2024-06-27 17:49:25,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998360718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:25,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:25,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:25,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201142221] [2024-06-27 17:49:25,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:25,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:25,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:25,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:25,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:25,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:25,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:25,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:26,219 INFO L124 PetriNetUnfolderBase]: 1523/2543 cut-off events. [2024-06-27 17:49:26,219 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-06-27 17:49:26,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 2543 events. 1523/2543 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14760 event pairs, 565 based on Foata normal form. 6/2523 useless extension candidates. Maximal degree in co-relation 6974. Up to 2169 conditions per place. [2024-06-27 17:49:26,233 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 70 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-06-27 17:49:26,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 518 flow [2024-06-27 17:49:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:49:26,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:49:26,235 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 270 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:49:26,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 518 flow [2024-06-27 17:49:26,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 95 transitions, 516 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:26,240 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 305 flow [2024-06-27 17:49:26,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-27 17:49:26,241 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2024-06-27 17:49:26,242 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 305 flow [2024-06-27 17:49:26,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:26,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:26,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:26,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:49:26,242 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 17:49:26,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash -576324553, now seen corresponding path program 1 times [2024-06-27 17:49:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:26,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762632711] [2024-06-27 17:49:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:26,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:26,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762632711] [2024-06-27 17:49:26,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762632711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:26,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:26,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:26,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773044661] [2024-06-27 17:49:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:26,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:26,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:26,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:26,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:26,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:26,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:26,590 INFO L124 PetriNetUnfolderBase]: 1510/2419 cut-off events. [2024-06-27 17:49:26,591 INFO L125 PetriNetUnfolderBase]: For 3078/3090 co-relation queries the response was YES. [2024-06-27 17:49:26,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7214 conditions, 2419 events. 1510/2419 cut-off events. For 3078/3090 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13589 event pairs, 492 based on Foata normal form. 12/2423 useless extension candidates. Maximal degree in co-relation 7191. Up to 2135 conditions per place. [2024-06-27 17:49:26,607 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 51 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-27 17:49:26,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 482 flow [2024-06-27 17:49:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 17:49:26,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:49:26,610 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 305 flow. Second operand 4 states and 120 transitions. [2024-06-27 17:49:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 482 flow [2024-06-27 17:49:26,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 455 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:26,618 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 340 flow [2024-06-27 17:49:26,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=340, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 17:49:26,621 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-06-27 17:49:26,621 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 340 flow [2024-06-27 17:49:26,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:26,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:26,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:49:26,622 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 17:49:26,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash 569170844, now seen corresponding path program 1 times [2024-06-27 17:49:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:26,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112078195] [2024-06-27 17:49:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:26,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:26,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112078195] [2024-06-27 17:49:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112078195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:26,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:26,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:26,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369095035] [2024-06-27 17:49:26,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:26,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:26,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:26,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:26,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:26,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:26,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:26,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:26,997 INFO L124 PetriNetUnfolderBase]: 1549/2488 cut-off events. [2024-06-27 17:49:26,997 INFO L125 PetriNetUnfolderBase]: For 3626/3629 co-relation queries the response was YES. [2024-06-27 17:49:27,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7653 conditions, 2488 events. 1549/2488 cut-off events. For 3626/3629 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13942 event pairs, 443 based on Foata normal form. 2/2476 useless extension candidates. Maximal degree in co-relation 7628. Up to 2097 conditions per place. [2024-06-27 17:49:27,014 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 70 selfloop transitions, 27 changer transitions 0/110 dead transitions. [2024-06-27 17:49:27,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 718 flow [2024-06-27 17:49:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:49:27,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:49:27,015 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 340 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:49:27,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 718 flow [2024-06-27 17:49:27,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 703 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:27,021 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 451 flow [2024-06-27 17:49:27,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 17:49:27,024 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2024-06-27 17:49:27,024 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 451 flow [2024-06-27 17:49:27,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:27,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:27,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:27,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:49:27,025 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 17:49:27,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:27,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1319713450, now seen corresponding path program 2 times [2024-06-27 17:49:27,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:27,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391769660] [2024-06-27 17:49:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:27,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:27,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391769660] [2024-06-27 17:49:27,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391769660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:27,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:27,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687877097] [2024-06-27 17:49:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:27,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:27,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:27,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 451 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:27,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:27,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:27,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:27,442 INFO L124 PetriNetUnfolderBase]: 1583/2570 cut-off events. [2024-06-27 17:49:27,443 INFO L125 PetriNetUnfolderBase]: For 5626/5629 co-relation queries the response was YES. [2024-06-27 17:49:27,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8609 conditions, 2570 events. 1583/2570 cut-off events. For 5626/5629 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14719 event pairs, 474 based on Foata normal form. 2/2558 useless extension candidates. Maximal degree in co-relation 8582. Up to 2212 conditions per place. [2024-06-27 17:49:27,464 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 74 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-27 17:49:27,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 773 flow [2024-06-27 17:49:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:49:27,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:49:27,466 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 451 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:49:27,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 773 flow [2024-06-27 17:49:27,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 743 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:27,475 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 537 flow [2024-06-27 17:49:27,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=537, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-27 17:49:27,477 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-27 17:49:27,477 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 537 flow [2024-06-27 17:49:27,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:27,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:27,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:27,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:49:27,478 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 17:49:27,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash -715168292, now seen corresponding path program 3 times [2024-06-27 17:49:27,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:27,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516978752] [2024-06-27 17:49:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:27,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:27,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:27,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516978752] [2024-06-27 17:49:27,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516978752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:27,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:27,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:27,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132732644] [2024-06-27 17:49:27,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:27,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:27,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:27,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:27,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:27,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:27,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 537 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:27,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:27,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:27,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:27,889 INFO L124 PetriNetUnfolderBase]: 1595/2567 cut-off events. [2024-06-27 17:49:27,889 INFO L125 PetriNetUnfolderBase]: For 6669/6672 co-relation queries the response was YES. [2024-06-27 17:49:27,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8899 conditions, 2567 events. 1595/2567 cut-off events. For 6669/6672 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14501 event pairs, 440 based on Foata normal form. 4/2561 useless extension candidates. Maximal degree in co-relation 8869. Up to 2155 conditions per place. [2024-06-27 17:49:27,902 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 73 selfloop transitions, 31 changer transitions 0/117 dead transitions. [2024-06-27 17:49:27,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 879 flow [2024-06-27 17:49:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:49:27,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 17:49:27,904 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 537 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:49:27,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 879 flow [2024-06-27 17:49:27,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 821 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:27,916 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 592 flow [2024-06-27 17:49:27,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-27 17:49:27,917 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-06-27 17:49:27,917 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 592 flow [2024-06-27 17:49:27,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:27,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:27,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:27,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:49:27,918 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 17:49:27,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:27,919 INFO L85 PathProgramCache]: Analyzing trace with hash -714922028, now seen corresponding path program 1 times [2024-06-27 17:49:27,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:27,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554791247] [2024-06-27 17:49:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:27,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554791247] [2024-06-27 17:49:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554791247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:28,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734113798] [2024-06-27 17:49:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:28,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:28,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 592 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:28,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:28,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:28,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:28,283 INFO L124 PetriNetUnfolderBase]: 1614/2613 cut-off events. [2024-06-27 17:49:28,284 INFO L125 PetriNetUnfolderBase]: For 8333/8348 co-relation queries the response was YES. [2024-06-27 17:49:28,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9252 conditions, 2613 events. 1614/2613 cut-off events. For 8333/8348 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14927 event pairs, 409 based on Foata normal form. 18/2617 useless extension candidates. Maximal degree in co-relation 9220. Up to 2219 conditions per place. [2024-06-27 17:49:28,298 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 74 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-27 17:49:28,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 852 flow [2024-06-27 17:49:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 17:49:28,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-27 17:49:28,300 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 592 flow. Second operand 5 states and 147 transitions. [2024-06-27 17:49:28,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 852 flow [2024-06-27 17:49:28,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 788 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:28,310 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 602 flow [2024-06-27 17:49:28,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=602, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-27 17:49:28,311 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-06-27 17:49:28,311 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 602 flow [2024-06-27 17:49:28,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:28,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:28,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:28,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:49:28,312 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 17:49:28,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 464428382, now seen corresponding path program 1 times [2024-06-27 17:49:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:28,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576785513] [2024-06-27 17:49:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:28,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:28,395 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 17:49:28,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:28,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576785513] [2024-06-27 17:49:28,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576785513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:28,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:28,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833285229] [2024-06-27 17:49:28,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:28,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:28,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:28,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:28,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:28,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 602 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:28,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:28,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:28,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:28,682 INFO L124 PetriNetUnfolderBase]: 1609/2706 cut-off events. [2024-06-27 17:49:28,682 INFO L125 PetriNetUnfolderBase]: For 8583/8598 co-relation queries the response was YES. [2024-06-27 17:49:28,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 2706 events. 1609/2706 cut-off events. For 8583/8598 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16081 event pairs, 666 based on Foata normal form. 10/2681 useless extension candidates. Maximal degree in co-relation 9518. Up to 2151 conditions per place. [2024-06-27 17:49:28,695 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 74 selfloop transitions, 30 changer transitions 0/117 dead transitions. [2024-06-27 17:49:28,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 918 flow [2024-06-27 17:49:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:49:28,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 17:49:28,697 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 602 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:49:28,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 918 flow [2024-06-27 17:49:28,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 868 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:28,707 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 620 flow [2024-06-27 17:49:28,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-27 17:49:28,708 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2024-06-27 17:49:28,708 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 620 flow [2024-06-27 17:49:28,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:28,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:28,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:28,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:49:28,709 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 17:49:28,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:28,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1269823262, now seen corresponding path program 2 times [2024-06-27 17:49:28,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:28,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636843672] [2024-06-27 17:49:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:28,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:28,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636843672] [2024-06-27 17:49:28,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636843672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:28,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:28,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:28,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106048120] [2024-06-27 17:49:28,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:28,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:28,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:28,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:28,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 620 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:28,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:28,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:28,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:29,076 INFO L124 PetriNetUnfolderBase]: 1626/2633 cut-off events. [2024-06-27 17:49:29,076 INFO L125 PetriNetUnfolderBase]: For 9476/9491 co-relation queries the response was YES. [2024-06-27 17:49:29,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9670 conditions, 2633 events. 1626/2633 cut-off events. For 9476/9491 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15135 event pairs, 458 based on Foata normal form. 10/2628 useless extension candidates. Maximal degree in co-relation 9636. Up to 2195 conditions per place. [2024-06-27 17:49:29,092 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 72 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-27 17:49:29,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 950 flow [2024-06-27 17:49:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 17:49:29,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-27 17:49:29,126 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 620 flow. Second operand 5 states and 152 transitions. [2024-06-27 17:49:29,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 950 flow [2024-06-27 17:49:29,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 841 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:29,139 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 608 flow [2024-06-27 17:49:29,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=608, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-27 17:49:29,139 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-06-27 17:49:29,140 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 608 flow [2024-06-27 17:49:29,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:29,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:29,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:49:29,140 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 17:49:29,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1269828842, now seen corresponding path program 3 times [2024-06-27 17:49:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789534487] [2024-06-27 17:49:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:29,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:29,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789534487] [2024-06-27 17:49:29,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789534487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:29,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:29,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:29,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351319948] [2024-06-27 17:49:29,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:29,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:29,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:29,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:29,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 608 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:29,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:29,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:29,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:29,537 INFO L124 PetriNetUnfolderBase]: 1621/2629 cut-off events. [2024-06-27 17:49:29,537 INFO L125 PetriNetUnfolderBase]: For 10102/10117 co-relation queries the response was YES. [2024-06-27 17:49:29,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9629 conditions, 2629 events. 1621/2629 cut-off events. For 10102/10117 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15050 event pairs, 446 based on Foata normal form. 12/2635 useless extension candidates. Maximal degree in co-relation 9596. Up to 2190 conditions per place. [2024-06-27 17:49:29,554 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 78 selfloop transitions, 33 changer transitions 0/124 dead transitions. [2024-06-27 17:49:29,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 916 flow [2024-06-27 17:49:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:49:29,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:49:29,555 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 608 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:49:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 916 flow [2024-06-27 17:49:29,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 868 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:29,574 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 634 flow [2024-06-27 17:49:29,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-06-27 17:49:29,575 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-06-27 17:49:29,575 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 634 flow [2024-06-27 17:49:29,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:29,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:29,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:29,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:49:29,576 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 17:49:29,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1509517467, now seen corresponding path program 1 times [2024-06-27 17:49:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:29,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476936814] [2024-06-27 17:49:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:29,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:29,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476936814] [2024-06-27 17:49:29,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476936814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:29,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:29,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349698120] [2024-06-27 17:49:29,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:29,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:29,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:29,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:29,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:29,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:29,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:29,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:30,021 INFO L124 PetriNetUnfolderBase]: 1770/2867 cut-off events. [2024-06-27 17:49:30,021 INFO L125 PetriNetUnfolderBase]: For 13186/13189 co-relation queries the response was YES. [2024-06-27 17:49:30,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10841 conditions, 2867 events. 1770/2867 cut-off events. For 13186/13189 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16758 event pairs, 330 based on Foata normal form. 4/2851 useless extension candidates. Maximal degree in co-relation 10807. Up to 2114 conditions per place. [2024-06-27 17:49:30,037 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 81 selfloop transitions, 44 changer transitions 0/138 dead transitions. [2024-06-27 17:49:30,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1084 flow [2024-06-27 17:49:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:49:30,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-27 17:49:30,039 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 634 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:49:30,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1084 flow [2024-06-27 17:49:30,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 996 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:30,064 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 685 flow [2024-06-27 17:49:30,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-06-27 17:49:30,065 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-06-27 17:49:30,065 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 685 flow [2024-06-27 17:49:30,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:30,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:30,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:30,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:49:30,065 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 17:49:30,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:30,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1344524365, now seen corresponding path program 2 times [2024-06-27 17:49:30,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:30,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637095355] [2024-06-27 17:49:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:30,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:30,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637095355] [2024-06-27 17:49:30,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637095355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:30,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:30,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124867229] [2024-06-27 17:49:30,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:30,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:30,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:30,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 685 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:30,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:30,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:30,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:30,491 INFO L124 PetriNetUnfolderBase]: 1797/2882 cut-off events. [2024-06-27 17:49:30,492 INFO L125 PetriNetUnfolderBase]: For 15308/15311 co-relation queries the response was YES. [2024-06-27 17:49:30,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11396 conditions, 2882 events. 1797/2882 cut-off events. For 15308/15311 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16539 event pairs, 433 based on Foata normal form. 4/2868 useless extension candidates. Maximal degree in co-relation 11361. Up to 2414 conditions per place. [2024-06-27 17:49:30,509 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 80 selfloop transitions, 41 changer transitions 0/134 dead transitions. [2024-06-27 17:49:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 1047 flow [2024-06-27 17:49:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:49:30,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 17:49:30,511 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 685 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:49:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 1047 flow [2024-06-27 17:49:30,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 134 transitions, 982 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:30,538 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 737 flow [2024-06-27 17:49:30,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=737, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2024-06-27 17:49:30,538 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-06-27 17:49:30,539 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 737 flow [2024-06-27 17:49:30,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:30,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:30,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:30,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:49:30,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:30,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1229233195, now seen corresponding path program 3 times [2024-06-27 17:49:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:30,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078979810] [2024-06-27 17:49:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:30,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:30,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078979810] [2024-06-27 17:49:30,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078979810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:30,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:30,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:30,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872745255] [2024-06-27 17:49:30,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:30,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:30,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:30,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 737 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:30,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:30,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:30,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:30,980 INFO L124 PetriNetUnfolderBase]: 1824/2995 cut-off events. [2024-06-27 17:49:30,980 INFO L125 PetriNetUnfolderBase]: For 18084/18087 co-relation queries the response was YES. [2024-06-27 17:49:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12027 conditions, 2995 events. 1824/2995 cut-off events. For 18084/18087 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17643 event pairs, 506 based on Foata normal form. 4/2987 useless extension candidates. Maximal degree in co-relation 11990. Up to 2559 conditions per place. [2024-06-27 17:49:31,000 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 96 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-27 17:49:31,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1093 flow [2024-06-27 17:49:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:49:31,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 17:49:31,002 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 737 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:49:31,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1093 flow [2024-06-27 17:49:31,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 998 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:31,026 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 729 flow [2024-06-27 17:49:31,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-06-27 17:49:31,027 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-06-27 17:49:31,027 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 729 flow [2024-06-27 17:49:31,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:31,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:31,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:31,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:49:31,028 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:31,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:31,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1865579505, now seen corresponding path program 1 times [2024-06-27 17:49:31,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:31,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624509271] [2024-06-27 17:49:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:31,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:31,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:31,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624509271] [2024-06-27 17:49:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624509271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:31,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:31,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845533435] [2024-06-27 17:49:31,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:31,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:31,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:31,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 729 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:31,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:31,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:31,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:31,340 INFO L124 PetriNetUnfolderBase]: 1767/2876 cut-off events. [2024-06-27 17:49:31,341 INFO L125 PetriNetUnfolderBase]: For 19533/19533 co-relation queries the response was YES. [2024-06-27 17:49:31,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11755 conditions, 2876 events. 1767/2876 cut-off events. For 19533/19533 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16945 event pairs, 410 based on Foata normal form. 3/2849 useless extension candidates. Maximal degree in co-relation 11717. Up to 2421 conditions per place. [2024-06-27 17:49:31,359 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 87 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2024-06-27 17:49:31,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1151 flow [2024-06-27 17:49:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:49:31,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 17:49:31,360 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 729 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:49:31,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1151 flow [2024-06-27 17:49:31,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 1086 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:31,386 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 832 flow [2024-06-27 17:49:31,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=832, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-06-27 17:49:31,386 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 46 predicate places. [2024-06-27 17:49:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 832 flow [2024-06-27 17:49:31,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:31,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:31,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:31,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:49:31,387 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 17:49:31,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1046871013, now seen corresponding path program 4 times [2024-06-27 17:49:31,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:31,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452666343] [2024-06-27 17:49:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:31,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:31,492 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 17:49:31,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:31,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452666343] [2024-06-27 17:49:31,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452666343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:31,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:31,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:31,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979124590] [2024-06-27 17:49:31,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:31,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:31,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:31,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:31,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 832 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:31,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:31,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:31,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:31,855 INFO L124 PetriNetUnfolderBase]: 1835/3017 cut-off events. [2024-06-27 17:49:31,856 INFO L125 PetriNetUnfolderBase]: For 22021/22024 co-relation queries the response was YES. [2024-06-27 17:49:31,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12462 conditions, 3017 events. 1835/3017 cut-off events. For 22021/22024 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17707 event pairs, 337 based on Foata normal form. 20/3026 useless extension candidates. Maximal degree in co-relation 12422. Up to 2293 conditions per place. [2024-06-27 17:49:31,874 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 99 selfloop transitions, 40 changer transitions 0/152 dead transitions. [2024-06-27 17:49:31,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 152 transitions, 1222 flow [2024-06-27 17:49:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:49:31,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:49:31,876 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 832 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:49:31,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 152 transitions, 1222 flow [2024-06-27 17:49:31,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 152 transitions, 1196 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:31,904 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 900 flow [2024-06-27 17:49:31,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=900, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2024-06-27 17:49:31,904 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-06-27 17:49:31,904 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 900 flow [2024-06-27 17:49:31,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:31,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:31,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:31,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:49:31,905 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 17:49:31,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash 146164531, now seen corresponding path program 1 times [2024-06-27 17:49:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043217527] [2024-06-27 17:49:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:32,008 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 17:49:32,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:32,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043217527] [2024-06-27 17:49:32,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043217527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:32,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:32,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:32,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037655454] [2024-06-27 17:49:32,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:32,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:32,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:32,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:32,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 900 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:32,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:32,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:32,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:32,354 INFO L124 PetriNetUnfolderBase]: 1862/3049 cut-off events. [2024-06-27 17:49:32,355 INFO L125 PetriNetUnfolderBase]: For 22720/22723 co-relation queries the response was YES. [2024-06-27 17:49:32,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12986 conditions, 3049 events. 1862/3049 cut-off events. For 22720/22723 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17865 event pairs, 498 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 12943. Up to 2621 conditions per place. [2024-06-27 17:49:32,377 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 103 selfloop transitions, 20 changer transitions 0/136 dead transitions. [2024-06-27 17:49:32,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1228 flow [2024-06-27 17:49:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:49:32,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:49:32,379 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 900 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:49:32,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1228 flow [2024-06-27 17:49:32,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 136 transitions, 1137 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:32,414 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 882 flow [2024-06-27 17:49:32,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=882, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-27 17:49:32,414 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2024-06-27 17:49:32,415 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 882 flow [2024-06-27 17:49:32,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:32,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:32,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:32,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:49:32,415 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 17:49:32,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash 154735411, now seen corresponding path program 2 times [2024-06-27 17:49:32,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:32,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984282453] [2024-06-27 17:49:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:32,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:32,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984282453] [2024-06-27 17:49:32,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984282453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:32,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37769423] [2024-06-27 17:49:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:32,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:32,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:32,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:32,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:32,803 INFO L124 PetriNetUnfolderBase]: 1854/2978 cut-off events. [2024-06-27 17:49:32,804 INFO L125 PetriNetUnfolderBase]: For 21903/21918 co-relation queries the response was YES. [2024-06-27 17:49:32,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12739 conditions, 2978 events. 1854/2978 cut-off events. For 21903/21918 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17255 event pairs, 381 based on Foata normal form. 12/2971 useless extension candidates. Maximal degree in co-relation 12695. Up to 2524 conditions per place. [2024-06-27 17:49:32,818 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 103 selfloop transitions, 20 changer transitions 0/136 dead transitions. [2024-06-27 17:49:32,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1208 flow [2024-06-27 17:49:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:49:32,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-27 17:49:32,820 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 882 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:49:32,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1208 flow [2024-06-27 17:49:32,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 136 transitions, 1153 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:32,843 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 904 flow [2024-06-27 17:49:32,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=904, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-27 17:49:32,843 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2024-06-27 17:49:32,843 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 904 flow [2024-06-27 17:49:32,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:32,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:32,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:49:32,844 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:32,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1865193555, now seen corresponding path program 2 times [2024-06-27 17:49:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600274408] [2024-06-27 17:49:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600274408] [2024-06-27 17:49:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600274408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:32,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:32,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195827519] [2024-06-27 17:49:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:32,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:32,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:32,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:32,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:32,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:33,168 INFO L124 PetriNetUnfolderBase]: 1844/3018 cut-off events. [2024-06-27 17:49:33,168 INFO L125 PetriNetUnfolderBase]: For 24794/24800 co-relation queries the response was YES. [2024-06-27 17:49:33,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13111 conditions, 3018 events. 1844/3018 cut-off events. For 24794/24800 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17983 event pairs, 388 based on Foata normal form. 12/2998 useless extension candidates. Maximal degree in co-relation 13066. Up to 2514 conditions per place. [2024-06-27 17:49:33,188 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 99 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-27 17:49:33,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1397 flow [2024-06-27 17:49:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 17:49:33,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977777777777778 [2024-06-27 17:49:33,189 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 904 flow. Second operand 5 states and 157 transitions. [2024-06-27 17:49:33,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1397 flow [2024-06-27 17:49:33,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1338 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:33,223 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1109 flow [2024-06-27 17:49:33,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1109, PETRI_PLACES=106, PETRI_TRANSITIONS=128} [2024-06-27 17:49:33,223 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2024-06-27 17:49:33,223 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1109 flow [2024-06-27 17:49:33,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:33,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:33,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:33,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:49:33,225 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 17:49:33,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1699267775, now seen corresponding path program 1 times [2024-06-27 17:49:33,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:33,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297298005] [2024-06-27 17:49:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:33,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:33,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:33,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297298005] [2024-06-27 17:49:33,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297298005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:33,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:33,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:33,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403388229] [2024-06-27 17:49:33,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:33,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:33,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:33,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:33,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:33,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:33,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 128 transitions, 1109 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:33,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:33,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:33,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:33,654 INFO L124 PetriNetUnfolderBase]: 2106/3384 cut-off events. [2024-06-27 17:49:33,654 INFO L125 PetriNetUnfolderBase]: For 33139/33154 co-relation queries the response was YES. [2024-06-27 17:49:33,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15738 conditions, 3384 events. 2106/3384 cut-off events. For 33139/33154 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20086 event pairs, 289 based on Foata normal form. 20/3387 useless extension candidates. Maximal degree in co-relation 15691. Up to 2284 conditions per place. [2024-06-27 17:49:33,682 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 123 selfloop transitions, 40 changer transitions 0/176 dead transitions. [2024-06-27 17:49:33,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 176 transitions, 1665 flow [2024-06-27 17:49:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:49:33,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 17:49:33,685 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1109 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:49:33,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 176 transitions, 1665 flow [2024-06-27 17:49:33,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 176 transitions, 1643 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:33,729 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1211 flow [2024-06-27 17:49:33,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-27 17:49:33,730 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-27 17:49:33,730 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1211 flow [2024-06-27 17:49:33,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:33,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:33,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:33,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:49:33,731 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 17:49:33,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -360883747, now seen corresponding path program 2 times [2024-06-27 17:49:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:33,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671523309] [2024-06-27 17:49:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:33,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:33,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671523309] [2024-06-27 17:49:33,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671523309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:33,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:33,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73963019] [2024-06-27 17:49:33,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:33,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:33,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1211 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:33,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:33,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:33,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:34,204 INFO L124 PetriNetUnfolderBase]: 2200/3686 cut-off events. [2024-06-27 17:49:34,204 INFO L125 PetriNetUnfolderBase]: For 39047/39062 co-relation queries the response was YES. [2024-06-27 17:49:34,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17062 conditions, 3686 events. 2200/3686 cut-off events. For 39047/39062 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23226 event pairs, 760 based on Foata normal form. 24/3661 useless extension candidates. Maximal degree in co-relation 17013. Up to 2920 conditions per place. [2024-06-27 17:49:34,229 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 124 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-06-27 17:49:34,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 171 transitions, 1653 flow [2024-06-27 17:49:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:49:34,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 17:49:34,230 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1211 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:49:34,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 171 transitions, 1653 flow [2024-06-27 17:49:34,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1603 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:34,281 INFO L231 Difference]: Finished difference. Result has 116 places, 131 transitions, 1258 flow [2024-06-27 17:49:34,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=116, PETRI_TRANSITIONS=131} [2024-06-27 17:49:34,282 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2024-06-27 17:49:34,282 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 1258 flow [2024-06-27 17:49:34,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:34,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:34,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:34,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:49:34,283 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 17:49:34,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -447723427, now seen corresponding path program 3 times [2024-06-27 17:49:34,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:34,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493168241] [2024-06-27 17:49:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:34,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:34,366 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 17:49:34,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:34,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493168241] [2024-06-27 17:49:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493168241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:34,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:34,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:34,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844091126] [2024-06-27 17:49:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:34,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:34,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:34,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:34,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 131 transitions, 1258 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:34,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:34,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:34,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:34,795 INFO L124 PetriNetUnfolderBase]: 2267/3795 cut-off events. [2024-06-27 17:49:34,795 INFO L125 PetriNetUnfolderBase]: For 42451/42466 co-relation queries the response was YES. [2024-06-27 17:49:34,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17849 conditions, 3795 events. 2267/3795 cut-off events. For 42451/42466 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23989 event pairs, 749 based on Foata normal form. 20/3766 useless extension candidates. Maximal degree in co-relation 17798. Up to 2904 conditions per place. [2024-06-27 17:49:34,822 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 126 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-27 17:49:34,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 175 transitions, 1724 flow [2024-06-27 17:49:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:49:34,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 17:49:34,823 INFO L175 Difference]: Start difference. First operand has 116 places, 131 transitions, 1258 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:49:34,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 175 transitions, 1724 flow [2024-06-27 17:49:34,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 175 transitions, 1649 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:34,877 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 1285 flow [2024-06-27 17:49:34,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1285, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-06-27 17:49:34,878 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-06-27 17:49:34,878 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 1285 flow [2024-06-27 17:49:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:34,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:34,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:34,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:49:34,878 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:34,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash 885244717, now seen corresponding path program 1 times [2024-06-27 17:49:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:34,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110603607] [2024-06-27 17:49:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:34,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110603607] [2024-06-27 17:49:34,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110603607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:34,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110556221] [2024-06-27 17:49:34,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:34,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:34,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:34,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:34,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 1285 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:34,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:34,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:34,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:35,386 INFO L124 PetriNetUnfolderBase]: 2278/3781 cut-off events. [2024-06-27 17:49:35,386 INFO L125 PetriNetUnfolderBase]: For 41965/41965 co-relation queries the response was YES. [2024-06-27 17:49:35,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17955 conditions, 3781 events. 2278/3781 cut-off events. For 41965/41965 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23713 event pairs, 809 based on Foata normal form. 1/3751 useless extension candidates. Maximal degree in co-relation 17903. Up to 3319 conditions per place. [2024-06-27 17:49:35,419 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 142 selfloop transitions, 22 changer transitions 0/177 dead transitions. [2024-06-27 17:49:35,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 177 transitions, 1817 flow [2024-06-27 17:49:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:49:35,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:49:35,421 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 1285 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:49:35,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 177 transitions, 1817 flow [2024-06-27 17:49:35,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 177 transitions, 1733 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:35,492 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1372 flow [2024-06-27 17:49:35,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1372, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-27 17:49:35,492 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 72 predicate places. [2024-06-27 17:49:35,492 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1372 flow [2024-06-27 17:49:35,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:35,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:35,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:35,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:49:35,493 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 17:49:35,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash 553988271, now seen corresponding path program 4 times [2024-06-27 17:49:35,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:35,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775115192] [2024-06-27 17:49:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:35,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:35,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775115192] [2024-06-27 17:49:35,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775115192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:35,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:35,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078709150] [2024-06-27 17:49:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:35,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:35,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:35,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:35,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:35,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:35,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:36,070 INFO L124 PetriNetUnfolderBase]: 2372/3847 cut-off events. [2024-06-27 17:49:36,070 INFO L125 PetriNetUnfolderBase]: For 49114/49129 co-relation queries the response was YES. [2024-06-27 17:49:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18893 conditions, 3847 events. 2372/3847 cut-off events. For 49114/49129 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23733 event pairs, 505 based on Foata normal form. 26/3865 useless extension candidates. Maximal degree in co-relation 18838. Up to 3220 conditions per place. [2024-06-27 17:49:36,142 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 146 selfloop transitions, 34 changer transitions 0/193 dead transitions. [2024-06-27 17:49:36,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 193 transitions, 1878 flow [2024-06-27 17:49:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:49:36,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 17:49:36,143 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1372 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:49:36,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 193 transitions, 1878 flow [2024-06-27 17:49:36,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 193 transitions, 1858 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:36,216 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 1453 flow [2024-06-27 17:49:36,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2024-06-27 17:49:36,216 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 80 predicate places. [2024-06-27 17:49:36,216 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 1453 flow [2024-06-27 17:49:36,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:36,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:36,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:36,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:49:36,217 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 17:49:36,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash 529482653, now seen corresponding path program 5 times [2024-06-27 17:49:36,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:36,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888294387] [2024-06-27 17:49:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:36,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888294387] [2024-06-27 17:49:36,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888294387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:36,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:36,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:36,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340986960] [2024-06-27 17:49:36,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:36,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:36,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:36,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:36,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:36,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 1453 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:36,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:36,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:36,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:36,794 INFO L124 PetriNetUnfolderBase]: 2431/3955 cut-off events. [2024-06-27 17:49:36,795 INFO L125 PetriNetUnfolderBase]: For 54196/54211 co-relation queries the response was YES. [2024-06-27 17:49:36,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19667 conditions, 3955 events. 2431/3955 cut-off events. For 54196/54211 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24728 event pairs, 536 based on Foata normal form. 24/3964 useless extension candidates. Maximal degree in co-relation 19609. Up to 3317 conditions per place. [2024-06-27 17:49:36,825 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 139 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2024-06-27 17:49:36,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 1911 flow [2024-06-27 17:49:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:49:36,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 17:49:36,826 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 1453 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:49:36,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 1911 flow [2024-06-27 17:49:36,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 182 transitions, 1832 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:36,906 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1469 flow [2024-06-27 17:49:36,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=129, PETRI_TRANSITIONS=148} [2024-06-27 17:49:36,907 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 80 predicate places. [2024-06-27 17:49:36,907 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1469 flow [2024-06-27 17:49:36,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:36,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:36,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:36,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:49:36,907 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 17:49:36,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 529334783, now seen corresponding path program 6 times [2024-06-27 17:49:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055536986] [2024-06-27 17:49:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:36,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:36,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055536986] [2024-06-27 17:49:36,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055536986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:36,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:36,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:36,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027046366] [2024-06-27 17:49:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:36,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:36,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:36,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:37,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:37,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 148 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:37,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:37,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:37,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:37,441 INFO L124 PetriNetUnfolderBase]: 2411/3923 cut-off events. [2024-06-27 17:49:37,441 INFO L125 PetriNetUnfolderBase]: For 51893/51908 co-relation queries the response was YES. [2024-06-27 17:49:37,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19187 conditions, 3923 events. 2411/3923 cut-off events. For 51893/51908 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24450 event pairs, 373 based on Foata normal form. 20/3926 useless extension candidates. Maximal degree in co-relation 19128. Up to 2818 conditions per place. [2024-06-27 17:49:37,478 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 136 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-27 17:49:37,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1921 flow [2024-06-27 17:49:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:49:37,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 17:49:37,479 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1469 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:49:37,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1921 flow [2024-06-27 17:49:37,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 185 transitions, 1842 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:37,587 INFO L231 Difference]: Finished difference. Result has 131 places, 148 transitions, 1469 flow [2024-06-27 17:49:37,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=131, PETRI_TRANSITIONS=148} [2024-06-27 17:49:37,587 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 82 predicate places. [2024-06-27 17:49:37,587 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 148 transitions, 1469 flow [2024-06-27 17:49:37,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:37,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:37,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:37,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:49:37,588 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 17:49:37,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash 535060235, now seen corresponding path program 1 times [2024-06-27 17:49:37,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92771409] [2024-06-27 17:49:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:37,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:37,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92771409] [2024-06-27 17:49:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92771409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:37,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526592780] [2024-06-27 17:49:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:37,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:37,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:37,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 148 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:37,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:37,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:37,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:38,155 INFO L124 PetriNetUnfolderBase]: 2478/4049 cut-off events. [2024-06-27 17:49:38,155 INFO L125 PetriNetUnfolderBase]: For 53902/53917 co-relation queries the response was YES. [2024-06-27 17:49:38,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19654 conditions, 4049 events. 2478/4049 cut-off events. For 53902/53917 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25541 event pairs, 463 based on Foata normal form. 22/4061 useless extension candidates. Maximal degree in co-relation 19594. Up to 3111 conditions per place. [2024-06-27 17:49:38,180 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 146 selfloop transitions, 39 changer transitions 0/198 dead transitions. [2024-06-27 17:49:38,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 198 transitions, 1993 flow [2024-06-27 17:49:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:49:38,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 17:49:38,181 INFO L175 Difference]: Start difference. First operand has 131 places, 148 transitions, 1469 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:49:38,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 198 transitions, 1993 flow [2024-06-27 17:49:38,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 198 transitions, 1889 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:38,237 INFO L231 Difference]: Finished difference. Result has 134 places, 149 transitions, 1471 flow [2024-06-27 17:49:38,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1471, PETRI_PLACES=134, PETRI_TRANSITIONS=149} [2024-06-27 17:49:38,237 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 85 predicate places. [2024-06-27 17:49:38,237 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 149 transitions, 1471 flow [2024-06-27 17:49:38,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:38,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:38,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:49:38,238 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:38,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 885543247, now seen corresponding path program 2 times [2024-06-27 17:49:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:38,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616888561] [2024-06-27 17:49:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:38,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:38,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616888561] [2024-06-27 17:49:38,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616888561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:38,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:38,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293586168] [2024-06-27 17:49:38,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:38,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:38,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:38,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:38,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 1471 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:38,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:38,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:38,698 INFO L124 PetriNetUnfolderBase]: 2489/4040 cut-off events. [2024-06-27 17:49:38,699 INFO L125 PetriNetUnfolderBase]: For 50887/50887 co-relation queries the response was YES. [2024-06-27 17:49:38,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19615 conditions, 4040 events. 2489/4040 cut-off events. For 50887/50887 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25230 event pairs, 501 based on Foata normal form. 1/4039 useless extension candidates. Maximal degree in co-relation 19554. Up to 3655 conditions per place. [2024-06-27 17:49:38,725 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 140 selfloop transitions, 25 changer transitions 0/178 dead transitions. [2024-06-27 17:49:38,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 178 transitions, 1938 flow [2024-06-27 17:49:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 17:49:38,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-27 17:49:38,726 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 1471 flow. Second operand 6 states and 169 transitions. [2024-06-27 17:49:38,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 178 transitions, 1938 flow [2024-06-27 17:49:38,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 178 transitions, 1848 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:38,799 INFO L231 Difference]: Finished difference. Result has 134 places, 153 transitions, 1464 flow [2024-06-27 17:49:38,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1464, PETRI_PLACES=134, PETRI_TRANSITIONS=153} [2024-06-27 17:49:38,799 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 85 predicate places. [2024-06-27 17:49:38,800 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 153 transitions, 1464 flow [2024-06-27 17:49:38,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:38,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:38,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:49:38,800 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 17:49:38,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1954280037, now seen corresponding path program 1 times [2024-06-27 17:49:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:38,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487211665] [2024-06-27 17:49:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:38,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:38,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487211665] [2024-06-27 17:49:38,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487211665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:38,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:38,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385871806] [2024-06-27 17:49:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:38,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:38,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:38,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:38,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:38,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 153 transitions, 1464 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 17:49:38,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:38,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:38,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:39,307 INFO L124 PetriNetUnfolderBase]: 2440/4247 cut-off events. [2024-06-27 17:49:39,307 INFO L125 PetriNetUnfolderBase]: For 55154/55167 co-relation queries the response was YES. [2024-06-27 17:49:39,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19435 conditions, 4247 events. 2440/4247 cut-off events. For 55154/55167 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28161 event pairs, 651 based on Foata normal form. 16/4224 useless extension candidates. Maximal degree in co-relation 19373. Up to 3282 conditions per place. [2024-06-27 17:49:39,390 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 110 selfloop transitions, 57 changer transitions 0/191 dead transitions. [2024-06-27 17:49:39,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2094 flow [2024-06-27 17:49:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:49:39,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:49:39,391 INFO L175 Difference]: Start difference. First operand has 134 places, 153 transitions, 1464 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:49:39,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2094 flow [2024-06-27 17:49:39,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 2058 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:39,474 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1719 flow [2024-06-27 17:49:39,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-27 17:49:39,475 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 90 predicate places. [2024-06-27 17:49:39,475 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1719 flow [2024-06-27 17:49:39,475 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 17:49:39,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:39,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:39,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:49:39,475 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:39,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash 125530225, now seen corresponding path program 2 times [2024-06-27 17:49:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562538811] [2024-06-27 17:49:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:39,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:39,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562538811] [2024-06-27 17:49:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562538811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:39,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:39,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:39,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508529347] [2024-06-27 17:49:39,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:39,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:39,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:39,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:39,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:39,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1719 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:39,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:39,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:40,140 INFO L124 PetriNetUnfolderBase]: 2603/4244 cut-off events. [2024-06-27 17:49:40,140 INFO L125 PetriNetUnfolderBase]: For 63485/63488 co-relation queries the response was YES. [2024-06-27 17:49:40,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21335 conditions, 4244 events. 2603/4244 cut-off events. For 63485/63488 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26818 event pairs, 366 based on Foata normal form. 12/4246 useless extension candidates. Maximal degree in co-relation 21271. Up to 3367 conditions per place. [2024-06-27 17:49:40,175 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 162 selfloop transitions, 43 changer transitions 0/218 dead transitions. [2024-06-27 17:49:40,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 218 transitions, 2295 flow [2024-06-27 17:49:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:49:40,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-06-27 17:49:40,178 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1719 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:49:40,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 218 transitions, 2295 flow [2024-06-27 17:49:40,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 218 transitions, 2238 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:40,317 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1780 flow [2024-06-27 17:49:40,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1780, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-06-27 17:49:40,317 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-27 17:49:40,317 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1780 flow [2024-06-27 17:49:40,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:40,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:40,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:49:40,318 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:40,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash 6320705, now seen corresponding path program 3 times [2024-06-27 17:49:40,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:40,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177305312] [2024-06-27 17:49:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:40,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:40,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177305312] [2024-06-27 17:49:40,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177305312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:40,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:40,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:40,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645594255] [2024-06-27 17:49:40,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:40,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:40,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:40,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:40,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1780 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:40,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:40,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:40,948 INFO L124 PetriNetUnfolderBase]: 2583/4314 cut-off events. [2024-06-27 17:49:40,948 INFO L125 PetriNetUnfolderBase]: For 63634/63649 co-relation queries the response was YES. [2024-06-27 17:49:40,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20895 conditions, 4314 events. 2583/4314 cut-off events. For 63634/63649 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28055 event pairs, 607 based on Foata normal form. 20/4286 useless extension candidates. Maximal degree in co-relation 20828. Up to 2675 conditions per place. [2024-06-27 17:49:40,984 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 154 selfloop transitions, 42 changer transitions 0/209 dead transitions. [2024-06-27 17:49:40,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 209 transitions, 2244 flow [2024-06-27 17:49:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:49:40,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 17:49:40,986 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1780 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:49:40,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 209 transitions, 2244 flow [2024-06-27 17:49:41,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 209 transitions, 2138 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:41,130 INFO L231 Difference]: Finished difference. Result has 146 places, 165 transitions, 1712 flow [2024-06-27 17:49:41,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=146, PETRI_TRANSITIONS=165} [2024-06-27 17:49:41,131 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-27 17:49:41,131 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 165 transitions, 1712 flow [2024-06-27 17:49:41,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:41,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:41,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:49:41,132 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 17:49:41,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1986424219, now seen corresponding path program 2 times [2024-06-27 17:49:41,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:41,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98479525] [2024-06-27 17:49:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:41,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:41,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:41,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98479525] [2024-06-27 17:49:41,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98479525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:41,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:41,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:41,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319768247] [2024-06-27 17:49:41,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:41,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:41,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:41,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:41,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 165 transitions, 1712 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 17:49:41,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:41,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:41,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:41,665 INFO L124 PetriNetUnfolderBase]: 2542/4224 cut-off events. [2024-06-27 17:49:41,665 INFO L125 PetriNetUnfolderBase]: For 59919/59925 co-relation queries the response was YES. [2024-06-27 17:49:41,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20678 conditions, 4224 events. 2542/4224 cut-off events. For 59919/59925 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27392 event pairs, 512 based on Foata normal form. 9/4200 useless extension candidates. Maximal degree in co-relation 20610. Up to 3521 conditions per place. [2024-06-27 17:49:41,700 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 131 selfloop transitions, 50 changer transitions 0/205 dead transitions. [2024-06-27 17:49:41,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 205 transitions, 2391 flow [2024-06-27 17:49:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:49:41,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 17:49:41,701 INFO L175 Difference]: Start difference. First operand has 146 places, 165 transitions, 1712 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:49:41,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 205 transitions, 2391 flow [2024-06-27 17:49:41,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 205 transitions, 2248 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:41,807 INFO L231 Difference]: Finished difference. Result has 146 places, 175 transitions, 1837 flow [2024-06-27 17:49:41,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1837, PETRI_PLACES=146, PETRI_TRANSITIONS=175} [2024-06-27 17:49:41,807 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-27 17:49:41,807 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 175 transitions, 1837 flow [2024-06-27 17:49:41,807 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 17:49:41,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:41,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:41,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:49:41,807 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 17:49:41,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2144906841, now seen corresponding path program 3 times [2024-06-27 17:49:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:41,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436633324] [2024-06-27 17:49:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:41,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436633324] [2024-06-27 17:49:41,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436633324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:41,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:41,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240935673] [2024-06-27 17:49:41,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:41,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:41,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 175 transitions, 1837 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:41,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:41,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,339 INFO L124 PetriNetUnfolderBase]: 2640/4302 cut-off events. [2024-06-27 17:49:42,340 INFO L125 PetriNetUnfolderBase]: For 59127/59127 co-relation queries the response was YES. [2024-06-27 17:49:42,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20705 conditions, 4302 events. 2640/4302 cut-off events. For 59127/59127 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 27325 event pairs, 513 based on Foata normal form. 2/4300 useless extension candidates. Maximal degree in co-relation 20637. Up to 3875 conditions per place. [2024-06-27 17:49:42,367 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 172 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-27 17:49:42,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2376 flow [2024-06-27 17:49:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 17:49:42,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-27 17:49:42,369 INFO L175 Difference]: Start difference. First operand has 146 places, 175 transitions, 1837 flow. Second operand 5 states and 152 transitions. [2024-06-27 17:49:42,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2376 flow [2024-06-27 17:49:42,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 211 transitions, 2329 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:42,476 INFO L231 Difference]: Finished difference. Result has 152 places, 184 transitions, 1967 flow [2024-06-27 17:49:42,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1967, PETRI_PLACES=152, PETRI_TRANSITIONS=184} [2024-06-27 17:49:42,477 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2024-06-27 17:49:42,477 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 184 transitions, 1967 flow [2024-06-27 17:49:42,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:42,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:42,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:49:42,478 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 17:49:42,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1598067743, now seen corresponding path program 1 times [2024-06-27 17:49:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:42,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614180825] [2024-06-27 17:49:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:42,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:42,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614180825] [2024-06-27 17:49:42,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614180825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:42,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:42,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468627251] [2024-06-27 17:49:42,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:42,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:42,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:42,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:42,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:42,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:42,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 184 transitions, 1967 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:42,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:42,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,993 INFO L124 PetriNetUnfolderBase]: 2648/4377 cut-off events. [2024-06-27 17:49:42,993 INFO L125 PetriNetUnfolderBase]: For 64391/64406 co-relation queries the response was YES. [2024-06-27 17:49:43,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21420 conditions, 4377 events. 2648/4377 cut-off events. For 64391/64406 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28320 event pairs, 561 based on Foata normal form. 12/4367 useless extension candidates. Maximal degree in co-relation 21348. Up to 3743 conditions per place. [2024-06-27 17:49:43,026 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 155 selfloop transitions, 41 changer transitions 0/209 dead transitions. [2024-06-27 17:49:43,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 209 transitions, 2585 flow [2024-06-27 17:49:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:49:43,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-27 17:49:43,027 INFO L175 Difference]: Start difference. First operand has 152 places, 184 transitions, 1967 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:49:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 209 transitions, 2585 flow [2024-06-27 17:49:43,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 209 transitions, 2575 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:43,151 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2133 flow [2024-06-27 17:49:43,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2133, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-27 17:49:43,152 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-27 17:49:43,152 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2133 flow [2024-06-27 17:49:43,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:43,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:43,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:49:43,152 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 17:49:43,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash 651956617, now seen corresponding path program 2 times [2024-06-27 17:49:43,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:43,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991879732] [2024-06-27 17:49:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:43,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:43,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991879732] [2024-06-27 17:49:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991879732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:43,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:43,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927457649] [2024-06-27 17:49:43,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:43,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:43,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:43,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2133 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:43,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:43,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:43,744 INFO L124 PetriNetUnfolderBase]: 2630/4309 cut-off events. [2024-06-27 17:49:43,744 INFO L125 PetriNetUnfolderBase]: For 65016/65019 co-relation queries the response was YES. [2024-06-27 17:49:43,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21561 conditions, 4309 events. 2630/4309 cut-off events. For 65016/65019 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27545 event pairs, 520 based on Foata normal form. 6/4307 useless extension candidates. Maximal degree in co-relation 21485. Up to 3723 conditions per place. [2024-06-27 17:49:43,778 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 155 selfloop transitions, 45 changer transitions 0/213 dead transitions. [2024-06-27 17:49:43,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 213 transitions, 2591 flow [2024-06-27 17:49:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:49:43,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 17:49:43,779 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2133 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:49:43,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 213 transitions, 2591 flow [2024-06-27 17:49:43,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 213 transitions, 2512 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:43,958 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 2165 flow [2024-06-27 17:49:43,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2165, PETRI_PLACES=162, PETRI_TRANSITIONS=189} [2024-06-27 17:49:43,958 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-27 17:49:43,959 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 2165 flow [2024-06-27 17:49:43,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:43,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:43,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:49:43,959 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:43,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2139766657, now seen corresponding path program 1 times [2024-06-27 17:49:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352555465] [2024-06-27 17:49:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:43,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:44,036 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 17:49:44,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:44,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352555465] [2024-06-27 17:49:44,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352555465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:44,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:44,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:44,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761038472] [2024-06-27 17:49:44,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:44,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:44,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:44,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:44,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:44,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:44,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 189 transitions, 2165 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 17:49:44,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:44,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:44,484 INFO L124 PetriNetUnfolderBase]: 2536/4265 cut-off events. [2024-06-27 17:49:44,485 INFO L125 PetriNetUnfolderBase]: For 69145/69151 co-relation queries the response was YES. [2024-06-27 17:49:44,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21059 conditions, 4265 events. 2536/4265 cut-off events. For 69145/69151 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27898 event pairs, 911 based on Foata normal form. 10/4217 useless extension candidates. Maximal degree in co-relation 20981. Up to 3682 conditions per place. [2024-06-27 17:49:44,518 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 163 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-27 17:49:44,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 204 transitions, 2571 flow [2024-06-27 17:49:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-27 17:49:44,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:49:44,519 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 2165 flow. Second operand 4 states and 116 transitions. [2024-06-27 17:49:44,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 204 transitions, 2571 flow [2024-06-27 17:49:44,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 204 transitions, 2502 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:44,734 INFO L231 Difference]: Finished difference. Result has 162 places, 191 transitions, 2156 flow [2024-06-27 17:49:44,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2156, PETRI_PLACES=162, PETRI_TRANSITIONS=191} [2024-06-27 17:49:44,735 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-27 17:49:44,735 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 191 transitions, 2156 flow [2024-06-27 17:49:44,735 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 17:49:44,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:44,735 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 17:49:44,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:49:44,735 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:44,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash 443874179, now seen corresponding path program 1 times [2024-06-27 17:49:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:44,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343338878] [2024-06-27 17:49:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:44,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:44,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:44,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343338878] [2024-06-27 17:49:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343338878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:44,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:44,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:44,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248719067] [2024-06-27 17:49:44,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:44,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:44,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:44,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:44,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 191 transitions, 2156 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:44,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:44,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:44,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:45,392 INFO L124 PetriNetUnfolderBase]: 2631/4421 cut-off events. [2024-06-27 17:49:45,392 INFO L125 PetriNetUnfolderBase]: For 66259/66259 co-relation queries the response was YES. [2024-06-27 17:49:45,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21655 conditions, 4421 events. 2631/4421 cut-off events. For 66259/66259 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28904 event pairs, 920 based on Foata normal form. 1/4384 useless extension candidates. Maximal degree in co-relation 21577. Up to 3800 conditions per place. [2024-06-27 17:49:45,429 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 182 selfloop transitions, 41 changer transitions 0/236 dead transitions. [2024-06-27 17:49:45,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 236 transitions, 2832 flow [2024-06-27 17:49:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:49:45,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-27 17:49:45,430 INFO L175 Difference]: Start difference. First operand has 162 places, 191 transitions, 2156 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:49:45,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 236 transitions, 2832 flow [2024-06-27 17:49:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 236 transitions, 2790 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:45,586 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 2317 flow [2024-06-27 17:49:45,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2317, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2024-06-27 17:49:45,586 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 119 predicate places. [2024-06-27 17:49:45,586 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 2317 flow [2024-06-27 17:49:45,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:45,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:45,587 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 17:49:45,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:49:45,587 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:45,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash 453128609, now seen corresponding path program 2 times [2024-06-27 17:49:45,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:45,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748379418] [2024-06-27 17:49:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:45,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:45,669 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 17:49:45,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:45,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748379418] [2024-06-27 17:49:45,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748379418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:45,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:45,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:45,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828067707] [2024-06-27 17:49:45,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:45,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:45,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:45,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:45,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 2317 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:45,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:45,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:45,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:46,139 INFO L124 PetriNetUnfolderBase]: 2656/4401 cut-off events. [2024-06-27 17:49:46,139 INFO L125 PetriNetUnfolderBase]: For 71147/71147 co-relation queries the response was YES. [2024-06-27 17:49:46,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22398 conditions, 4401 events. 2656/4401 cut-off events. For 71147/71147 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28269 event pairs, 652 based on Foata normal form. 1/4393 useless extension candidates. Maximal degree in co-relation 22318. Up to 3827 conditions per place. [2024-06-27 17:49:46,172 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 180 selfloop transitions, 45 changer transitions 0/238 dead transitions. [2024-06-27 17:49:46,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 238 transitions, 3044 flow [2024-06-27 17:49:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 17:49:46,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:49:46,173 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 2317 flow. Second operand 7 states and 196 transitions. [2024-06-27 17:49:46,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 238 transitions, 3044 flow [2024-06-27 17:49:46,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 238 transitions, 3000 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:46,340 INFO L231 Difference]: Finished difference. Result has 173 places, 209 transitions, 2444 flow [2024-06-27 17:49:46,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2444, PETRI_PLACES=173, PETRI_TRANSITIONS=209} [2024-06-27 17:49:46,340 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-27 17:49:46,340 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 209 transitions, 2444 flow [2024-06-27 17:49:46,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:46,341 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 17:49:46,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:49:46,341 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:46,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1687178957, now seen corresponding path program 3 times [2024-06-27 17:49:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137123367] [2024-06-27 17:49:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:46,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:46,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137123367] [2024-06-27 17:49:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137123367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:46,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:46,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035774419] [2024-06-27 17:49:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:46,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:46,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:46,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:46,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 209 transitions, 2444 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:46,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:46,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:46,925 INFO L124 PetriNetUnfolderBase]: 2653/4442 cut-off events. [2024-06-27 17:49:46,926 INFO L125 PetriNetUnfolderBase]: For 73408/73408 co-relation queries the response was YES. [2024-06-27 17:49:46,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22560 conditions, 4442 events. 2653/4442 cut-off events. For 73408/73408 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 29031 event pairs, 913 based on Foata normal form. 1/4407 useless extension candidates. Maximal degree in co-relation 22478. Up to 3824 conditions per place. [2024-06-27 17:49:46,956 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 178 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-27 17:49:46,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 237 transitions, 3026 flow [2024-06-27 17:49:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:49:46,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-27 17:49:46,957 INFO L175 Difference]: Start difference. First operand has 173 places, 209 transitions, 2444 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:49:46,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 237 transitions, 3026 flow [2024-06-27 17:49:47,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 237 transitions, 2947 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:47,139 INFO L231 Difference]: Finished difference. Result has 178 places, 209 transitions, 2463 flow [2024-06-27 17:49:47,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2463, PETRI_PLACES=178, PETRI_TRANSITIONS=209} [2024-06-27 17:49:47,140 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 129 predicate places. [2024-06-27 17:49:47,140 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 209 transitions, 2463 flow [2024-06-27 17:49:47,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:47,140 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 17:49:47,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:49:47,140 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:47,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1894898243, now seen corresponding path program 4 times [2024-06-27 17:49:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:47,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923801435] [2024-06-27 17:49:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:47,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:47,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923801435] [2024-06-27 17:49:47,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923801435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:47,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:47,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:47,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698227612] [2024-06-27 17:49:47,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:47,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:47,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:47,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:47,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 209 transitions, 2463 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:47,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:47,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:47,756 INFO L124 PetriNetUnfolderBase]: 2664/4421 cut-off events. [2024-06-27 17:49:47,756 INFO L125 PetriNetUnfolderBase]: For 77891/77891 co-relation queries the response was YES. [2024-06-27 17:49:47,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22692 conditions, 4421 events. 2664/4421 cut-off events. For 77891/77891 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28515 event pairs, 651 based on Foata normal form. 1/4415 useless extension candidates. Maximal degree in co-relation 22609. Up to 3885 conditions per place. [2024-06-27 17:49:47,795 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 196 selfloop transitions, 34 changer transitions 0/243 dead transitions. [2024-06-27 17:49:47,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 243 transitions, 3108 flow [2024-06-27 17:49:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:49:47,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:49:47,796 INFO L175 Difference]: Start difference. First operand has 178 places, 209 transitions, 2463 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:49:47,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 243 transitions, 3108 flow [2024-06-27 17:49:47,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 243 transitions, 3012 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:48,000 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 2480 flow [2024-06-27 17:49:48,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2480, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2024-06-27 17:49:48,001 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 130 predicate places. [2024-06-27 17:49:48,001 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 2480 flow [2024-06-27 17:49:48,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:48,001 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 17:49:48,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:49:48,001 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:48,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2067590333, now seen corresponding path program 5 times [2024-06-27 17:49:48,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:48,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220657018] [2024-06-27 17:49:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:48,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:48,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:48,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220657018] [2024-06-27 17:49:48,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220657018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:48,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:48,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:48,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270365889] [2024-06-27 17:49:48,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:48,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:48,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:48,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 2480 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:48,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:48,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:48,589 INFO L124 PetriNetUnfolderBase]: 2661/4413 cut-off events. [2024-06-27 17:49:48,589 INFO L125 PetriNetUnfolderBase]: For 80239/80239 co-relation queries the response was YES. [2024-06-27 17:49:48,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22674 conditions, 4413 events. 2661/4413 cut-off events. For 80239/80239 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28471 event pairs, 655 based on Foata normal form. 1/4405 useless extension candidates. Maximal degree in co-relation 22590. Up to 3882 conditions per place. [2024-06-27 17:49:48,618 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 191 selfloop transitions, 32 changer transitions 0/236 dead transitions. [2024-06-27 17:49:48,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 2982 flow [2024-06-27 17:49:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 17:49:48,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-27 17:49:48,619 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 2480 flow. Second operand 6 states and 169 transitions. [2024-06-27 17:49:48,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 2982 flow [2024-06-27 17:49:48,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 236 transitions, 2874 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:48,792 INFO L231 Difference]: Finished difference. Result has 181 places, 212 transitions, 2442 flow [2024-06-27 17:49:48,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2442, PETRI_PLACES=181, PETRI_TRANSITIONS=212} [2024-06-27 17:49:48,793 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 132 predicate places. [2024-06-27 17:49:48,793 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 212 transitions, 2442 flow [2024-06-27 17:49:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:48,793 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 17:49:48,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:49:48,793 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:48,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1999508657, now seen corresponding path program 1 times [2024-06-27 17:49:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85118529] [2024-06-27 17:49:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:48,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85118529] [2024-06-27 17:49:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85118529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:48,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227194490] [2024-06-27 17:49:48,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:48,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:48,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:48,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:48,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 212 transitions, 2442 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:48,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:48,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:49,423 INFO L124 PetriNetUnfolderBase]: 2669/4410 cut-off events. [2024-06-27 17:49:49,424 INFO L125 PetriNetUnfolderBase]: For 85736/85751 co-relation queries the response was YES. [2024-06-27 17:49:49,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22750 conditions, 4410 events. 2669/4410 cut-off events. For 85736/85751 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28590 event pairs, 594 based on Foata normal form. 12/4392 useless extension candidates. Maximal degree in co-relation 22665. Up to 3598 conditions per place. [2024-06-27 17:49:49,463 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 151 selfloop transitions, 74 changer transitions 0/238 dead transitions. [2024-06-27 17:49:49,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 238 transitions, 3141 flow [2024-06-27 17:49:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:49:49,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 17:49:49,468 INFO L175 Difference]: Start difference. First operand has 181 places, 212 transitions, 2442 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:49:49,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 238 transitions, 3141 flow [2024-06-27 17:49:49,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 238 transitions, 3035 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:49,677 INFO L231 Difference]: Finished difference. Result has 182 places, 215 transitions, 2536 flow [2024-06-27 17:49:49,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2536, PETRI_PLACES=182, PETRI_TRANSITIONS=215} [2024-06-27 17:49:49,677 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 133 predicate places. [2024-06-27 17:49:49,677 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 215 transitions, 2536 flow [2024-06-27 17:49:49,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:49,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:49,678 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 17:49:49,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:49:49,678 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:49,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1264180215, now seen corresponding path program 2 times [2024-06-27 17:49:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:49,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025330014] [2024-06-27 17:49:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:49,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:49,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025330014] [2024-06-27 17:49:49,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025330014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:49,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:49,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928824086] [2024-06-27 17:49:49,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:49,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:49,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:49,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:49,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 215 transitions, 2536 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:49,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:49,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:49,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:50,228 INFO L124 PetriNetUnfolderBase]: 2677/4414 cut-off events. [2024-06-27 17:49:50,229 INFO L125 PetriNetUnfolderBase]: For 88502/88505 co-relation queries the response was YES. [2024-06-27 17:49:50,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23070 conditions, 4414 events. 2677/4414 cut-off events. For 88502/88505 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28468 event pairs, 521 based on Foata normal form. 4/4401 useless extension candidates. Maximal degree in co-relation 22985. Up to 3732 conditions per place. [2024-06-27 17:49:50,264 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 175 selfloop transitions, 59 changer transitions 0/247 dead transitions. [2024-06-27 17:49:50,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 247 transitions, 3282 flow [2024-06-27 17:49:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:49:50,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:49:50,265 INFO L175 Difference]: Start difference. First operand has 182 places, 215 transitions, 2536 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:49:50,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 247 transitions, 3282 flow [2024-06-27 17:49:50,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 3081 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:50,581 INFO L231 Difference]: Finished difference. Result has 184 places, 218 transitions, 2514 flow [2024-06-27 17:49:50,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2514, PETRI_PLACES=184, PETRI_TRANSITIONS=218} [2024-06-27 17:49:50,581 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-27 17:49:50,581 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 218 transitions, 2514 flow [2024-06-27 17:49:50,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:50,582 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 17:49:50,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:49:50,582 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:50,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:50,583 INFO L85 PathProgramCache]: Analyzing trace with hash 866617038, now seen corresponding path program 1 times [2024-06-27 17:49:50,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:50,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13298979] [2024-06-27 17:49:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:50,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:50,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13298979] [2024-06-27 17:49:50,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13298979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:50,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:50,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069676876] [2024-06-27 17:49:50,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:50,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:50,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:50,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:50,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:50,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:50,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 218 transitions, 2514 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:50,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:50,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:51,238 INFO L124 PetriNetUnfolderBase]: 2695/4475 cut-off events. [2024-06-27 17:49:51,238 INFO L125 PetriNetUnfolderBase]: For 89457/89457 co-relation queries the response was YES. [2024-06-27 17:49:51,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23127 conditions, 4475 events. 2695/4475 cut-off events. For 89457/89457 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28825 event pairs, 507 based on Foata normal form. 2/4472 useless extension candidates. Maximal degree in co-relation 23042. Up to 3870 conditions per place. [2024-06-27 17:49:51,277 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 217 selfloop transitions, 31 changer transitions 0/261 dead transitions. [2024-06-27 17:49:51,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 261 transitions, 3210 flow [2024-06-27 17:49:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:49:51,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 17:49:51,282 INFO L175 Difference]: Start difference. First operand has 184 places, 218 transitions, 2514 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:49:51,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 261 transitions, 3210 flow [2024-06-27 17:49:51,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 261 transitions, 3062 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:51,509 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 2465 flow [2024-06-27 17:49:51,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2465, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-27 17:49:51,510 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 138 predicate places. [2024-06-27 17:49:51,510 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 2465 flow [2024-06-27 17:49:51,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:51,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:51,511 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 17:49:51,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:49:51,511 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:51,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash 475697082, now seen corresponding path program 2 times [2024-06-27 17:49:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:51,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625441651] [2024-06-27 17:49:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:51,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:51,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:51,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625441651] [2024-06-27 17:49:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625441651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:51,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:51,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817850600] [2024-06-27 17:49:51,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:51,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:51,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 2465 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:51,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:51,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:51,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:52,084 INFO L124 PetriNetUnfolderBase]: 2713/4413 cut-off events. [2024-06-27 17:49:52,085 INFO L125 PetriNetUnfolderBase]: For 91721/91721 co-relation queries the response was YES. [2024-06-27 17:49:52,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23145 conditions, 4413 events. 2713/4413 cut-off events. For 91721/91721 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28086 event pairs, 496 based on Foata normal form. 2/4413 useless extension candidates. Maximal degree in co-relation 23059. Up to 3963 conditions per place. [2024-06-27 17:49:52,122 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 217 selfloop transitions, 28 changer transitions 0/258 dead transitions. [2024-06-27 17:49:52,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 258 transitions, 3053 flow [2024-06-27 17:49:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 17:49:52,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 17:49:52,123 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 2465 flow. Second operand 7 states and 195 transitions. [2024-06-27 17:49:52,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 258 transitions, 3053 flow [2024-06-27 17:49:52,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 258 transitions, 3007 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:52,378 INFO L231 Difference]: Finished difference. Result has 192 places, 224 transitions, 2502 flow [2024-06-27 17:49:52,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2502, PETRI_PLACES=192, PETRI_TRANSITIONS=224} [2024-06-27 17:49:52,378 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-27 17:49:52,378 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 224 transitions, 2502 flow [2024-06-27 17:49:52,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:52,378 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 17:49:52,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:49:52,379 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:52,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash -611496998, now seen corresponding path program 1 times [2024-06-27 17:49:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238118196] [2024-06-27 17:49:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:52,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:52,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238118196] [2024-06-27 17:49:52,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238118196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:52,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:52,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:52,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402810565] [2024-06-27 17:49:52,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:52,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:52,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:52,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:52,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 224 transitions, 2502 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:52,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:52,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:53,108 INFO L124 PetriNetUnfolderBase]: 2752/4522 cut-off events. [2024-06-27 17:49:53,109 INFO L125 PetriNetUnfolderBase]: For 99397/99400 co-relation queries the response was YES. [2024-06-27 17:49:53,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23725 conditions, 4522 events. 2752/4522 cut-off events. For 99397/99400 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29259 event pairs, 546 based on Foata normal form. 1/4498 useless extension candidates. Maximal degree in co-relation 23637. Up to 3645 conditions per place. [2024-06-27 17:49:53,165 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 76 changer transitions 0/277 dead transitions. [2024-06-27 17:49:53,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 277 transitions, 3608 flow [2024-06-27 17:49:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:49:53,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:49:53,166 INFO L175 Difference]: Start difference. First operand has 192 places, 224 transitions, 2502 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:49:53,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 277 transitions, 3608 flow [2024-06-27 17:49:53,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 3553 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:53,477 INFO L231 Difference]: Finished difference. Result has 194 places, 237 transitions, 2761 flow [2024-06-27 17:49:53,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2761, PETRI_PLACES=194, PETRI_TRANSITIONS=237} [2024-06-27 17:49:53,478 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-27 17:49:53,478 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 237 transitions, 2761 flow [2024-06-27 17:49:53,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:53,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:53,478 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 17:49:53,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:49:53,479 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:53,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash 875190894, now seen corresponding path program 2 times [2024-06-27 17:49:53,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:53,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353172652] [2024-06-27 17:49:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:53,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:53,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:53,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353172652] [2024-06-27 17:49:53,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353172652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:53,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:53,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:53,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661436832] [2024-06-27 17:49:53,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:53,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:53,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:53,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:53,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 237 transitions, 2761 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:53,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:53,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:53,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:54,191 INFO L124 PetriNetUnfolderBase]: 2791/4583 cut-off events. [2024-06-27 17:49:54,191 INFO L125 PetriNetUnfolderBase]: For 108636/108639 co-relation queries the response was YES. [2024-06-27 17:49:54,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25066 conditions, 4583 events. 2791/4583 cut-off events. For 108636/108639 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29678 event pairs, 546 based on Foata normal form. 1/4559 useless extension candidates. Maximal degree in co-relation 24977. Up to 3678 conditions per place. [2024-06-27 17:49:54,236 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 185 selfloop transitions, 83 changer transitions 0/281 dead transitions. [2024-06-27 17:49:54,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 3823 flow [2024-06-27 17:49:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:49:54,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 17:49:54,237 INFO L175 Difference]: Start difference. First operand has 194 places, 237 transitions, 2761 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:49:54,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 3823 flow [2024-06-27 17:49:54,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 281 transitions, 3713 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:54,517 INFO L231 Difference]: Finished difference. Result has 200 places, 244 transitions, 2919 flow [2024-06-27 17:49:54,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2919, PETRI_PLACES=200, PETRI_TRANSITIONS=244} [2024-06-27 17:49:54,518 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 151 predicate places. [2024-06-27 17:49:54,518 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 244 transitions, 2919 flow [2024-06-27 17:49:54,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:54,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:54,518 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 17:49:54,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:49:54,518 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:54,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1162075248, now seen corresponding path program 3 times [2024-06-27 17:49:54,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:54,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663085865] [2024-06-27 17:49:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:54,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:54,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663085865] [2024-06-27 17:49:54,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663085865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:54,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:54,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:54,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901435309] [2024-06-27 17:49:54,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:54,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:54,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:54,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:54,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:54,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:54,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 244 transitions, 2919 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:54,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:54,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:55,133 INFO L124 PetriNetUnfolderBase]: 2809/4557 cut-off events. [2024-06-27 17:49:55,133 INFO L125 PetriNetUnfolderBase]: For 111488/111488 co-relation queries the response was YES. [2024-06-27 17:49:55,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25485 conditions, 4557 events. 2809/4557 cut-off events. For 111488/111488 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29062 event pairs, 497 based on Foata normal form. 2/4557 useless extension candidates. Maximal degree in co-relation 25393. Up to 4095 conditions per place. [2024-06-27 17:49:55,174 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 234 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-27 17:49:55,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 274 transitions, 3519 flow [2024-06-27 17:49:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 17:49:55,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-27 17:49:55,175 INFO L175 Difference]: Start difference. First operand has 200 places, 244 transitions, 2919 flow. Second operand 7 states and 190 transitions. [2024-06-27 17:49:55,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 274 transitions, 3519 flow [2024-06-27 17:49:55,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 274 transitions, 3378 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:55,432 INFO L231 Difference]: Finished difference. Result has 204 places, 246 transitions, 2855 flow [2024-06-27 17:49:55,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2855, PETRI_PLACES=204, PETRI_TRANSITIONS=246} [2024-06-27 17:49:55,433 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 155 predicate places. [2024-06-27 17:49:55,433 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 246 transitions, 2855 flow [2024-06-27 17:49:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:55,433 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 17:49:55,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:49:55,433 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:55,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash 984768144, now seen corresponding path program 3 times [2024-06-27 17:49:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:55,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565145468] [2024-06-27 17:49:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:55,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:55,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:55,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565145468] [2024-06-27 17:49:55,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565145468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:55,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:55,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152454859] [2024-06-27 17:49:55,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:55,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:55,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:55,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 246 transitions, 2855 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:56,087 INFO L124 PetriNetUnfolderBase]: 2856/4647 cut-off events. [2024-06-27 17:49:56,088 INFO L125 PetriNetUnfolderBase]: For 116495/116498 co-relation queries the response was YES. [2024-06-27 17:49:56,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 4647 events. 2856/4647 cut-off events. For 116495/116498 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29890 event pairs, 531 based on Foata normal form. 1/4633 useless extension candidates. Maximal degree in co-relation 25682. Up to 3987 conditions per place. [2024-06-27 17:49:56,123 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 221 selfloop transitions, 60 changer transitions 0/294 dead transitions. [2024-06-27 17:49:56,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 294 transitions, 3940 flow [2024-06-27 17:49:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:49:56,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 17:49:56,124 INFO L175 Difference]: Start difference. First operand has 204 places, 246 transitions, 2855 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:49:56,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 294 transitions, 3940 flow [2024-06-27 17:49:56,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 294 transitions, 3883 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:56,351 INFO L231 Difference]: Finished difference. Result has 207 places, 258 transitions, 3114 flow [2024-06-27 17:49:56,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3114, PETRI_PLACES=207, PETRI_TRANSITIONS=258} [2024-06-27 17:49:56,351 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2024-06-27 17:49:56,351 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 258 transitions, 3114 flow [2024-06-27 17:49:56,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:56,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:56,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:56,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:49:56,352 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 17:49:56,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:56,352 INFO L85 PathProgramCache]: Analyzing trace with hash 985066674, now seen corresponding path program 4 times [2024-06-27 17:49:56,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:56,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377253372] [2024-06-27 17:49:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:56,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:56,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377253372] [2024-06-27 17:49:56,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377253372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:56,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:56,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:56,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328560992] [2024-06-27 17:49:56,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:56,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:56,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:56,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 258 transitions, 3114 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:56,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:56,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:56,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:57,170 INFO L124 PetriNetUnfolderBase]: 2878/4717 cut-off events. [2024-06-27 17:49:57,170 INFO L125 PetriNetUnfolderBase]: For 124503/124506 co-relation queries the response was YES. [2024-06-27 17:49:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26423 conditions, 4717 events. 2878/4717 cut-off events. For 124503/124506 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30631 event pairs, 530 based on Foata normal form. 1/4697 useless extension candidates. Maximal degree in co-relation 26328. Up to 4003 conditions per place. [2024-06-27 17:49:57,224 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 226 selfloop transitions, 67 changer transitions 0/306 dead transitions. [2024-06-27 17:49:57,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 306 transitions, 4163 flow [2024-06-27 17:49:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 17:49:57,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-06-27 17:49:57,225 INFO L175 Difference]: Start difference. First operand has 207 places, 258 transitions, 3114 flow. Second operand 9 states and 250 transitions. [2024-06-27 17:49:57,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 306 transitions, 4163 flow [2024-06-27 17:49:57,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 306 transitions, 4045 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:57,592 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 3227 flow [2024-06-27 17:49:57,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3227, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-27 17:49:57,592 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 165 predicate places. [2024-06-27 17:49:57,592 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 3227 flow [2024-06-27 17:49:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:57,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:57,593 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 17:49:57,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:49:57,593 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 17:49:57,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1605884946, now seen corresponding path program 1 times [2024-06-27 17:49:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:57,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714240790] [2024-06-27 17:49:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:57,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:57,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:57,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714240790] [2024-06-27 17:49:57,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714240790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:57,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:57,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:57,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805371480] [2024-06-27 17:49:57,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:57,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:57,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:57,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:57,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:57,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:57,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 3227 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:57,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:57,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:57,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:58,265 INFO L124 PetriNetUnfolderBase]: 2889/4704 cut-off events. [2024-06-27 17:49:58,266 INFO L125 PetriNetUnfolderBase]: For 126548/126551 co-relation queries the response was YES. [2024-06-27 17:49:58,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26605 conditions, 4704 events. 2889/4704 cut-off events. For 126548/126551 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30293 event pairs, 531 based on Foata normal form. 1/4690 useless extension candidates. Maximal degree in co-relation 26509. Up to 4054 conditions per place. [2024-06-27 17:49:58,308 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 228 selfloop transitions, 58 changer transitions 0/299 dead transitions. [2024-06-27 17:49:58,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 299 transitions, 4109 flow [2024-06-27 17:49:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:49:58,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-27 17:49:58,311 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 3227 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:49:58,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 299 transitions, 4109 flow [2024-06-27 17:49:58,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 299 transitions, 3984 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:58,647 INFO L231 Difference]: Finished difference. Result has 216 places, 267 transitions, 3272 flow [2024-06-27 17:49:58,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3272, PETRI_PLACES=216, PETRI_TRANSITIONS=267} [2024-06-27 17:49:58,648 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 167 predicate places. [2024-06-27 17:49:58,648 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 267 transitions, 3272 flow [2024-06-27 17:49:58,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:58,648 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 17:49:58,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:49:58,649 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 17:49:58,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash 762587388, now seen corresponding path program 5 times [2024-06-27 17:49:58,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:58,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474612833] [2024-06-27 17:49:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:58,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:58,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:58,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474612833] [2024-06-27 17:49:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474612833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:58,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:58,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001079175] [2024-06-27 17:49:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:58,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:58,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:58,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 267 transitions, 3272 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:58,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:58,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:59,415 INFO L124 PetriNetUnfolderBase]: 2942/4796 cut-off events. [2024-06-27 17:49:59,415 INFO L125 PetriNetUnfolderBase]: For 135177/135180 co-relation queries the response was YES. [2024-06-27 17:49:59,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27243 conditions, 4796 events. 2942/4796 cut-off events. For 135177/135180 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31030 event pairs, 553 based on Foata normal form. 1/4773 useless extension candidates. Maximal degree in co-relation 27146. Up to 3793 conditions per place. [2024-06-27 17:49:59,455 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 186 selfloop transitions, 109 changer transitions 0/308 dead transitions. [2024-06-27 17:49:59,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 308 transitions, 4436 flow [2024-06-27 17:49:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:49:59,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 17:49:59,456 INFO L175 Difference]: Start difference. First operand has 216 places, 267 transitions, 3272 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:49:59,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 308 transitions, 4436 flow [2024-06-27 17:49:59,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 308 transitions, 4318 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:59,905 INFO L231 Difference]: Finished difference. Result has 219 places, 277 transitions, 3498 flow [2024-06-27 17:49:59,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3498, PETRI_PLACES=219, PETRI_TRANSITIONS=277} [2024-06-27 17:49:59,905 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 170 predicate places. [2024-06-27 17:49:59,906 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 277 transitions, 3498 flow [2024-06-27 17:49:59,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:59,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:59,906 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 17:49:59,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:49:59,906 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 17:49:59,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1155761342, now seen corresponding path program 2 times [2024-06-27 17:49:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125262875] [2024-06-27 17:49:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:59,973 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 17:49:59,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125262875] [2024-06-27 17:49:59,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125262875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:59,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:59,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674220524] [2024-06-27 17:49:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:00,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:00,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 277 transitions, 3498 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:00,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:00,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:00,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:00,577 INFO L124 PetriNetUnfolderBase]: 2953/4830 cut-off events. [2024-06-27 17:50:00,578 INFO L125 PetriNetUnfolderBase]: For 143745/143748 co-relation queries the response was YES. [2024-06-27 17:50:00,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27759 conditions, 4830 events. 2953/4830 cut-off events. For 143745/143748 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31430 event pairs, 527 based on Foata normal form. 1/4810 useless extension candidates. Maximal degree in co-relation 27661. Up to 4138 conditions per place. [2024-06-27 17:50:00,619 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 238 selfloop transitions, 61 changer transitions 0/312 dead transitions. [2024-06-27 17:50:00,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4410 flow [2024-06-27 17:50:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 17:50:00,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:50:00,620 INFO L175 Difference]: Start difference. First operand has 219 places, 277 transitions, 3498 flow. Second operand 8 states and 220 transitions. [2024-06-27 17:50:00,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4410 flow [2024-06-27 17:50:01,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 312 transitions, 4224 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:01,061 INFO L231 Difference]: Finished difference. Result has 224 places, 280 transitions, 3486 flow [2024-06-27 17:50:01,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3486, PETRI_PLACES=224, PETRI_TRANSITIONS=280} [2024-06-27 17:50:01,062 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 175 predicate places. [2024-06-27 17:50:01,062 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 280 transitions, 3486 flow [2024-06-27 17:50:01,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:01,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:01,062 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 17:50:01,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:50:01,062 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 17:50:01,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash 762707358, now seen corresponding path program 6 times [2024-06-27 17:50:01,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:01,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094614490] [2024-06-27 17:50:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:01,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:01,139 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 17:50:01,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094614490] [2024-06-27 17:50:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094614490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:01,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:01,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811781899] [2024-06-27 17:50:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:01,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:01,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:01,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:01,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 280 transitions, 3486 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:01,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:01,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:01,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:01,758 INFO L124 PetriNetUnfolderBase]: 2950/4832 cut-off events. [2024-06-27 17:50:01,758 INFO L125 PetriNetUnfolderBase]: For 147771/147774 co-relation queries the response was YES. [2024-06-27 17:50:01,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27515 conditions, 4832 events. 2950/4832 cut-off events. For 147771/147774 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31492 event pairs, 530 based on Foata normal form. 1/4809 useless extension candidates. Maximal degree in co-relation 27416. Up to 4127 conditions per place. [2024-06-27 17:50:01,804 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 232 selfloop transitions, 64 changer transitions 0/309 dead transitions. [2024-06-27 17:50:01,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 309 transitions, 4344 flow [2024-06-27 17:50:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:50:01,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-27 17:50:01,805 INFO L175 Difference]: Start difference. First operand has 224 places, 280 transitions, 3486 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:50:01,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 309 transitions, 4344 flow [2024-06-27 17:50:02,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 309 transitions, 4212 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:02,460 INFO L231 Difference]: Finished difference. Result has 227 places, 280 transitions, 3488 flow [2024-06-27 17:50:02,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3488, PETRI_PLACES=227, PETRI_TRANSITIONS=280} [2024-06-27 17:50:02,462 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 178 predicate places. [2024-06-27 17:50:02,462 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 280 transitions, 3488 flow [2024-06-27 17:50:02,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:02,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:02,462 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 17:50:02,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:50:02,462 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 17:50:02,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1765643866, now seen corresponding path program 1 times [2024-06-27 17:50:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:02,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429268787] [2024-06-27 17:50:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:02,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:02,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429268787] [2024-06-27 17:50:02,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429268787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:02,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:02,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:02,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767082016] [2024-06-27 17:50:02,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:02,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:02,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:02,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 280 transitions, 3488 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 17:50:02,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:02,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:02,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:03,158 INFO L124 PetriNetUnfolderBase]: 2959/4846 cut-off events. [2024-06-27 17:50:03,159 INFO L125 PetriNetUnfolderBase]: For 165885/165885 co-relation queries the response was YES. [2024-06-27 17:50:03,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27672 conditions, 4846 events. 2959/4846 cut-off events. For 165885/165885 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31805 event pairs, 563 based on Foata normal form. 12/4812 useless extension candidates. Maximal degree in co-relation 27572. Up to 3794 conditions per place. [2024-06-27 17:50:03,206 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 180 selfloop transitions, 97 changer transitions 0/315 dead transitions. [2024-06-27 17:50:03,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 315 transitions, 4370 flow [2024-06-27 17:50:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:50:03,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-27 17:50:03,207 INFO L175 Difference]: Start difference. First operand has 227 places, 280 transitions, 3488 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:50:03,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 315 transitions, 4370 flow [2024-06-27 17:50:03,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 315 transitions, 4236 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:03,726 INFO L231 Difference]: Finished difference. Result has 229 places, 282 transitions, 3591 flow [2024-06-27 17:50:03,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3591, PETRI_PLACES=229, PETRI_TRANSITIONS=282} [2024-06-27 17:50:03,727 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 180 predicate places. [2024-06-27 17:50:03,727 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 282 transitions, 3591 flow [2024-06-27 17:50:03,727 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 17:50:03,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:03,727 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 17:50:03,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:50:03,727 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 17:50:03,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:03,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1387706354, now seen corresponding path program 4 times [2024-06-27 17:50:03,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:03,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760539600] [2024-06-27 17:50:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:03,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:03,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760539600] [2024-06-27 17:50:03,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760539600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:03,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:03,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:03,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962626708] [2024-06-27 17:50:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:03,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:03,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:03,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:03,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 282 transitions, 3591 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:03,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:03,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:03,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:04,470 INFO L124 PetriNetUnfolderBase]: 3109/5014 cut-off events. [2024-06-27 17:50:04,470 INFO L125 PetriNetUnfolderBase]: For 165843/165843 co-relation queries the response was YES. [2024-06-27 17:50:04,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28993 conditions, 5014 events. 3109/5014 cut-off events. For 165843/165843 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32397 event pairs, 388 based on Foata normal form. 10/5020 useless extension candidates. Maximal degree in co-relation 28892. Up to 4414 conditions per place. [2024-06-27 17:50:04,521 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 276 selfloop transitions, 31 changer transitions 0/320 dead transitions. [2024-06-27 17:50:04,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 320 transitions, 4323 flow [2024-06-27 17:50:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:50:04,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 17:50:04,522 INFO L175 Difference]: Start difference. First operand has 229 places, 282 transitions, 3591 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:50:04,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 320 transitions, 4323 flow [2024-06-27 17:50:05,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 320 transitions, 4122 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:05,274 INFO L231 Difference]: Finished difference. Result has 230 places, 283 transitions, 3475 flow [2024-06-27 17:50:05,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3475, PETRI_PLACES=230, PETRI_TRANSITIONS=283} [2024-06-27 17:50:05,274 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 181 predicate places. [2024-06-27 17:50:05,274 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 283 transitions, 3475 flow [2024-06-27 17:50:05,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:05,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:05,275 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 17:50:05,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:50:05,275 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 17:50:05,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:05,275 INFO L85 PathProgramCache]: Analyzing trace with hash -351025240, now seen corresponding path program 3 times [2024-06-27 17:50:05,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:05,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198181973] [2024-06-27 17:50:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:05,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:05,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198181973] [2024-06-27 17:50:05,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198181973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:05,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:05,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564841513] [2024-06-27 17:50:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:05,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:05,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 283 transitions, 3475 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:05,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:05,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:05,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:06,159 INFO L124 PetriNetUnfolderBase]: 3106/5062 cut-off events. [2024-06-27 17:50:06,159 INFO L125 PetriNetUnfolderBase]: For 161059/161074 co-relation queries the response was YES. [2024-06-27 17:50:06,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28667 conditions, 5062 events. 3106/5062 cut-off events. For 161059/161074 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33244 event pairs, 573 based on Foata normal form. 11/5043 useless extension candidates. Maximal degree in co-relation 28565. Up to 4368 conditions per place. [2024-06-27 17:50:06,213 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 236 selfloop transitions, 56 changer transitions 0/305 dead transitions. [2024-06-27 17:50:06,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 305 transitions, 4215 flow [2024-06-27 17:50:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 17:50:06,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:50:06,214 INFO L175 Difference]: Start difference. First operand has 230 places, 283 transitions, 3475 flow. Second operand 6 states and 168 transitions. [2024-06-27 17:50:06,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 305 transitions, 4215 flow [2024-06-27 17:50:06,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 305 transitions, 4152 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:06,701 INFO L231 Difference]: Finished difference. Result has 232 places, 283 transitions, 3530 flow [2024-06-27 17:50:06,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3530, PETRI_PLACES=232, PETRI_TRANSITIONS=283} [2024-06-27 17:50:06,702 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 183 predicate places. [2024-06-27 17:50:06,702 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 283 transitions, 3530 flow [2024-06-27 17:50:06,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:06,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:06,702 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 17:50:06,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:50:06,703 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 17:50:06,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:06,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1356247342, now seen corresponding path program 7 times [2024-06-27 17:50:06,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:06,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518166191] [2024-06-27 17:50:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:06,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:06,767 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 17:50:06,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:06,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518166191] [2024-06-27 17:50:06,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518166191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:06,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:06,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245689781] [2024-06-27 17:50:06,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:06,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:06,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:06,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:06,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 283 transitions, 3530 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:06,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:06,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:06,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:07,414 INFO L124 PetriNetUnfolderBase]: 3114/5074 cut-off events. [2024-06-27 17:50:07,414 INFO L125 PetriNetUnfolderBase]: For 165963/165966 co-relation queries the response was YES. [2024-06-27 17:50:07,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28885 conditions, 5074 events. 3114/5074 cut-off events. For 165963/165966 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33279 event pairs, 555 based on Foata normal form. 2/5054 useless extension candidates. Maximal degree in co-relation 28782. Up to 4124 conditions per place. [2024-06-27 17:50:07,466 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 205 selfloop transitions, 107 changer transitions 0/325 dead transitions. [2024-06-27 17:50:07,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 325 transitions, 4606 flow [2024-06-27 17:50:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:50:07,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:50:07,467 INFO L175 Difference]: Start difference. First operand has 232 places, 283 transitions, 3530 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:50:07,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 325 transitions, 4606 flow [2024-06-27 17:50:08,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 325 transitions, 4472 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:08,149 INFO L231 Difference]: Finished difference. Result has 236 places, 286 transitions, 3689 flow [2024-06-27 17:50:08,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3689, PETRI_PLACES=236, PETRI_TRANSITIONS=286} [2024-06-27 17:50:08,149 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 187 predicate places. [2024-06-27 17:50:08,150 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 286 transitions, 3689 flow [2024-06-27 17:50:08,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:08,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:08,150 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 17:50:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:50:08,150 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 17:50:08,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1578454736, now seen corresponding path program 4 times [2024-06-27 17:50:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:08,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415786700] [2024-06-27 17:50:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:08,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:08,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415786700] [2024-06-27 17:50:08,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415786700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:08,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:08,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:08,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90073048] [2024-06-27 17:50:08,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:08,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:08,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:08,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:08,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 286 transitions, 3689 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:08,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:08,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:08,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:08,871 INFO L124 PetriNetUnfolderBase]: 3111/5040 cut-off events. [2024-06-27 17:50:08,871 INFO L125 PetriNetUnfolderBase]: For 165888/165891 co-relation queries the response was YES. [2024-06-27 17:50:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29218 conditions, 5040 events. 3111/5040 cut-off events. For 165888/165891 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32784 event pairs, 543 based on Foata normal form. 1/5027 useless extension candidates. Maximal degree in co-relation 29113. Up to 4376 conditions per place. [2024-06-27 17:50:08,922 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 237 selfloop transitions, 60 changer transitions 0/310 dead transitions. [2024-06-27 17:50:08,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 310 transitions, 4339 flow [2024-06-27 17:50:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:50:08,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 17:50:08,923 INFO L175 Difference]: Start difference. First operand has 236 places, 286 transitions, 3689 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:50:08,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 310 transitions, 4339 flow [2024-06-27 17:50:09,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 310 transitions, 4110 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:09,407 INFO L231 Difference]: Finished difference. Result has 236 places, 286 transitions, 3594 flow [2024-06-27 17:50:09,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3594, PETRI_PLACES=236, PETRI_TRANSITIONS=286} [2024-06-27 17:50:09,407 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 187 predicate places. [2024-06-27 17:50:09,408 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 286 transitions, 3594 flow [2024-06-27 17:50:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:09,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:09,408 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 17:50:09,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:50:09,408 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 17:50:09,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1239736256, now seen corresponding path program 8 times [2024-06-27 17:50:09,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:09,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383393312] [2024-06-27 17:50:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:09,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:09,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383393312] [2024-06-27 17:50:09,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383393312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:09,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:09,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:09,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307922862] [2024-06-27 17:50:09,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:09,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:09,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:09,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:09,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 286 transitions, 3594 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:09,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:09,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:09,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:10,142 INFO L124 PetriNetUnfolderBase]: 3105/5041 cut-off events. [2024-06-27 17:50:10,142 INFO L125 PetriNetUnfolderBase]: For 158611/158614 co-relation queries the response was YES. [2024-06-27 17:50:10,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28761 conditions, 5041 events. 3105/5041 cut-off events. For 158611/158614 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32878 event pairs, 552 based on Foata normal form. 2/5028 useless extension candidates. Maximal degree in co-relation 28656. Up to 4117 conditions per place. [2024-06-27 17:50:10,189 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 207 selfloop transitions, 110 changer transitions 0/330 dead transitions. [2024-06-27 17:50:10,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 330 transitions, 4546 flow [2024-06-27 17:50:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-06-27 17:50:10,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-27 17:50:10,190 INFO L175 Difference]: Start difference. First operand has 236 places, 286 transitions, 3594 flow. Second operand 9 states and 260 transitions. [2024-06-27 17:50:10,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 330 transitions, 4546 flow [2024-06-27 17:50:10,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 330 transitions, 4396 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:10,795 INFO L231 Difference]: Finished difference. Result has 238 places, 286 transitions, 3691 flow [2024-06-27 17:50:10,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3691, PETRI_PLACES=238, PETRI_TRANSITIONS=286} [2024-06-27 17:50:10,796 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 189 predicate places. [2024-06-27 17:50:10,796 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 286 transitions, 3691 flow [2024-06-27 17:50:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:10,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:10,797 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 17:50:10,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:50:10,797 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 17:50:10,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash -535131056, now seen corresponding path program 9 times [2024-06-27 17:50:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3697195] [2024-06-27 17:50:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:10,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3697195] [2024-06-27 17:50:10,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3697195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:10,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:10,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:10,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206618215] [2024-06-27 17:50:10,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:10,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:10,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:10,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:10,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 286 transitions, 3691 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:10,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:10,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:10,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:11,553 INFO L124 PetriNetUnfolderBase]: 3247/5303 cut-off events. [2024-06-27 17:50:11,553 INFO L125 PetriNetUnfolderBase]: For 163324/163327 co-relation queries the response was YES. [2024-06-27 17:50:11,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30538 conditions, 5303 events. 3247/5303 cut-off events. For 163324/163327 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35159 event pairs, 525 based on Foata normal form. 6/5294 useless extension candidates. Maximal degree in co-relation 30434. Up to 4482 conditions per place. [2024-06-27 17:50:11,605 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 263 selfloop transitions, 75 changer transitions 0/351 dead transitions. [2024-06-27 17:50:11,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 351 transitions, 5016 flow [2024-06-27 17:50:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-27 17:50:11,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962962962962963 [2024-06-27 17:50:11,606 INFO L175 Difference]: Start difference. First operand has 238 places, 286 transitions, 3691 flow. Second operand 6 states and 188 transitions. [2024-06-27 17:50:11,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 351 transitions, 5016 flow [2024-06-27 17:50:12,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 351 transitions, 4725 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 17:50:12,193 INFO L231 Difference]: Finished difference. Result has 235 places, 314 transitions, 4097 flow [2024-06-27 17:50:12,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4097, PETRI_PLACES=235, PETRI_TRANSITIONS=314} [2024-06-27 17:50:12,194 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 186 predicate places. [2024-06-27 17:50:12,194 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 314 transitions, 4097 flow [2024-06-27 17:50:12,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:12,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:12,194 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 17:50:12,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:50:12,195 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 17:50:12,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:12,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1387583408, now seen corresponding path program 10 times [2024-06-27 17:50:12,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:12,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957608158] [2024-06-27 17:50:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:12,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957608158] [2024-06-27 17:50:12,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957608158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:12,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:12,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080286813] [2024-06-27 17:50:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:12,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:12,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:12,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 314 transitions, 4097 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:12,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:12,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:12,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:13,053 INFO L124 PetriNetUnfolderBase]: 3255/5314 cut-off events. [2024-06-27 17:50:13,053 INFO L125 PetriNetUnfolderBase]: For 153428/153434 co-relation queries the response was YES. [2024-06-27 17:50:13,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31147 conditions, 5314 events. 3255/5314 cut-off events. For 153428/153434 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35148 event pairs, 525 based on Foata normal form. 6/5300 useless extension candidates. Maximal degree in co-relation 31043. Up to 4549 conditions per place. [2024-06-27 17:50:13,094 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 271 selfloop transitions, 69 changer transitions 0/353 dead transitions. [2024-06-27 17:50:13,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 353 transitions, 4913 flow [2024-06-27 17:50:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:50:13,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 17:50:13,095 INFO L175 Difference]: Start difference. First operand has 235 places, 314 transitions, 4097 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:50:13,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 353 transitions, 4913 flow [2024-06-27 17:50:13,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 353 transitions, 4837 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:13,736 INFO L231 Difference]: Finished difference. Result has 240 places, 317 transitions, 4229 flow [2024-06-27 17:50:13,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4229, PETRI_PLACES=240, PETRI_TRANSITIONS=317} [2024-06-27 17:50:13,737 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 191 predicate places. [2024-06-27 17:50:13,737 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 317 transitions, 4229 flow [2024-06-27 17:50:13,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:13,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:13,738 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 17:50:13,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:50:13,738 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 17:50:13,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1387703378, now seen corresponding path program 11 times [2024-06-27 17:50:13,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:13,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458311094] [2024-06-27 17:50:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:13,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:13,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:13,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458311094] [2024-06-27 17:50:13,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458311094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:13,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:13,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:13,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441119766] [2024-06-27 17:50:13,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:13,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:13,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:13,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:13,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 317 transitions, 4229 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:13,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:13,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:13,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:14,596 INFO L124 PetriNetUnfolderBase]: 3305/5723 cut-off events. [2024-06-27 17:50:14,596 INFO L125 PetriNetUnfolderBase]: For 164853/164859 co-relation queries the response was YES. [2024-06-27 17:50:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32781 conditions, 5723 events. 3305/5723 cut-off events. For 164853/164859 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39592 event pairs, 706 based on Foata normal form. 6/5713 useless extension candidates. Maximal degree in co-relation 32676. Up to 4378 conditions per place. [2024-06-27 17:50:14,650 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 233 selfloop transitions, 123 changer transitions 0/369 dead transitions. [2024-06-27 17:50:14,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 369 transitions, 5317 flow [2024-06-27 17:50:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:50:14,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 17:50:14,651 INFO L175 Difference]: Start difference. First operand has 240 places, 317 transitions, 4229 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:50:14,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 369 transitions, 5317 flow [2024-06-27 17:50:15,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 369 transitions, 5078 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:15,195 INFO L231 Difference]: Finished difference. Result has 242 places, 329 transitions, 4509 flow [2024-06-27 17:50:15,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4509, PETRI_PLACES=242, PETRI_TRANSITIONS=329} [2024-06-27 17:50:15,196 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 193 predicate places. [2024-06-27 17:50:15,196 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 329 transitions, 4509 flow [2024-06-27 17:50:15,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:15,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:15,197 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 17:50:15,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:50:15,197 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 17:50:15,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash 329222810, now seen corresponding path program 2 times [2024-06-27 17:50:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:15,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147239415] [2024-06-27 17:50:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:15,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:15,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147239415] [2024-06-27 17:50:15,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147239415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:15,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:15,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869123748] [2024-06-27 17:50:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:15,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:15,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:15,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:15,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 329 transitions, 4509 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 17:50:15,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:15,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:15,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:16,081 INFO L124 PetriNetUnfolderBase]: 3284/5399 cut-off events. [2024-06-27 17:50:16,082 INFO L125 PetriNetUnfolderBase]: For 188550/188568 co-relation queries the response was YES. [2024-06-27 17:50:16,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33464 conditions, 5399 events. 3284/5399 cut-off events. For 188550/188568 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36308 event pairs, 521 based on Foata normal form. 30/5389 useless extension candidates. Maximal degree in co-relation 33358. Up to 4386 conditions per place. [2024-06-27 17:50:16,135 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 255 selfloop transitions, 73 changer transitions 0/367 dead transitions. [2024-06-27 17:50:16,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 367 transitions, 5529 flow [2024-06-27 17:50:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:50:16,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 17:50:16,136 INFO L175 Difference]: Start difference. First operand has 242 places, 329 transitions, 4509 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:50:16,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 367 transitions, 5529 flow [2024-06-27 17:50:16,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 367 transitions, 5372 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:16,777 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4555 flow [2024-06-27 17:50:16,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4555, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-27 17:50:16,778 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 196 predicate places. [2024-06-27 17:50:16,778 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4555 flow [2024-06-27 17:50:16,778 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 17:50:16,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:16,778 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 17:50:16,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:50:16,778 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 17:50:16,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash -987839648, now seen corresponding path program 3 times [2024-06-27 17:50:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:16,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667537464] [2024-06-27 17:50:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:16,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:16,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667537464] [2024-06-27 17:50:16,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667537464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:16,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459061510] [2024-06-27 17:50:16,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:16,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:16,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:16,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:16,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:16,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4555 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 17:50:16,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:16,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:16,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:17,774 INFO L124 PetriNetUnfolderBase]: 3394/5517 cut-off events. [2024-06-27 17:50:17,774 INFO L125 PetriNetUnfolderBase]: For 190535/190535 co-relation queries the response was YES. [2024-06-27 17:50:17,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34905 conditions, 5517 events. 3394/5517 cut-off events. For 190535/190535 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36940 event pairs, 529 based on Foata normal form. 14/5502 useless extension candidates. Maximal degree in co-relation 34798. Up to 4567 conditions per place. [2024-06-27 17:50:17,835 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 267 selfloop transitions, 62 changer transitions 0/368 dead transitions. [2024-06-27 17:50:17,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 368 transitions, 5377 flow [2024-06-27 17:50:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:50:17,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-27 17:50:17,836 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4555 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:50:17,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 368 transitions, 5377 flow [2024-06-27 17:50:18,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 368 transitions, 5216 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:18,552 INFO L231 Difference]: Finished difference. Result has 246 places, 334 transitions, 4593 flow [2024-06-27 17:50:18,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4593, PETRI_PLACES=246, PETRI_TRANSITIONS=334} [2024-06-27 17:50:18,553 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 197 predicate places. [2024-06-27 17:50:18,553 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 334 transitions, 4593 flow [2024-06-27 17:50:18,553 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 17:50:18,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:18,553 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 17:50:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:50:18,553 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 17:50:18,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash -973554848, now seen corresponding path program 4 times [2024-06-27 17:50:18,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:18,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138342926] [2024-06-27 17:50:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:18,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:18,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138342926] [2024-06-27 17:50:18,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138342926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:18,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:18,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:18,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477277323] [2024-06-27 17:50:18,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:18,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:18,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:18,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:18,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 334 transitions, 4593 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 17:50:18,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:18,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:18,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:19,538 INFO L124 PetriNetUnfolderBase]: 3689/5965 cut-off events. [2024-06-27 17:50:19,539 INFO L125 PetriNetUnfolderBase]: For 222320/222320 co-relation queries the response was YES. [2024-06-27 17:50:19,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38386 conditions, 5965 events. 3689/5965 cut-off events. For 222320/222320 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 40182 event pairs, 450 based on Foata normal form. 14/5948 useless extension candidates. Maximal degree in co-relation 38278. Up to 4469 conditions per place. [2024-06-27 17:50:19,601 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 276 selfloop transitions, 64 changer transitions 0/379 dead transitions. [2024-06-27 17:50:19,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 379 transitions, 5631 flow [2024-06-27 17:50:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-27 17:50:19,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:50:19,601 INFO L175 Difference]: Start difference. First operand has 246 places, 334 transitions, 4593 flow. Second operand 6 states and 192 transitions. [2024-06-27 17:50:19,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 379 transitions, 5631 flow [2024-06-27 17:50:20,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 379 transitions, 5496 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:20,496 INFO L231 Difference]: Finished difference. Result has 249 places, 340 transitions, 4736 flow [2024-06-27 17:50:20,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4736, PETRI_PLACES=249, PETRI_TRANSITIONS=340} [2024-06-27 17:50:20,496 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 200 predicate places. [2024-06-27 17:50:20,496 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 340 transitions, 4736 flow [2024-06-27 17:50:20,497 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 17:50:20,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:20,497 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 17:50:20,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:50:20,497 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 17:50:20,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -353873272, now seen corresponding path program 1 times [2024-06-27 17:50:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:20,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429417218] [2024-06-27 17:50:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:20,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429417218] [2024-06-27 17:50:20,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429417218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:20,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:20,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878529777] [2024-06-27 17:50:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:20,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:20,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:20,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:20,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 340 transitions, 4736 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:20,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:20,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:21,810 INFO L124 PetriNetUnfolderBase]: 3877/6251 cut-off events. [2024-06-27 17:50:21,810 INFO L125 PetriNetUnfolderBase]: For 226083/226101 co-relation queries the response was YES. [2024-06-27 17:50:21,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40646 conditions, 6251 events. 3877/6251 cut-off events. For 226083/226101 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42109 event pairs, 586 based on Foata normal form. 16/6233 useless extension candidates. Maximal degree in co-relation 40536. Up to 5299 conditions per place. [2024-06-27 17:50:21,893 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 292 selfloop transitions, 70 changer transitions 0/375 dead transitions. [2024-06-27 17:50:21,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 375 transitions, 5765 flow [2024-06-27 17:50:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 17:50:21,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 17:50:21,894 INFO L175 Difference]: Start difference. First operand has 249 places, 340 transitions, 4736 flow. Second operand 6 states and 173 transitions. [2024-06-27 17:50:21,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 375 transitions, 5765 flow [2024-06-27 17:50:22,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 375 transitions, 5676 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:22,978 INFO L231 Difference]: Finished difference. Result has 254 places, 348 transitions, 4953 flow [2024-06-27 17:50:22,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4953, PETRI_PLACES=254, PETRI_TRANSITIONS=348} [2024-06-27 17:50:22,979 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 205 predicate places. [2024-06-27 17:50:22,979 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 348 transitions, 4953 flow [2024-06-27 17:50:22,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:22,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,979 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 17:50:22,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:50:22,979 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 17:50:22,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash -480968952, now seen corresponding path program 2 times [2024-06-27 17:50:22,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584222919] [2024-06-27 17:50:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:23,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584222919] [2024-06-27 17:50:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584222919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:23,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:23,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:23,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041361156] [2024-06-27 17:50:23,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:23,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:23,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:23,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 348 transitions, 4953 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:23,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:23,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:23,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:24,039 INFO L124 PetriNetUnfolderBase]: 3890/6284 cut-off events. [2024-06-27 17:50:24,039 INFO L125 PetriNetUnfolderBase]: For 230357/230375 co-relation queries the response was YES. [2024-06-27 17:50:24,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 6284 events. 3890/6284 cut-off events. For 230357/230375 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42609 event pairs, 677 based on Foata normal form. 16/6264 useless extension candidates. Maximal degree in co-relation 41075. Up to 5469 conditions per place. [2024-06-27 17:50:24,105 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 296 selfloop transitions, 63 changer transitions 0/372 dead transitions. [2024-06-27 17:50:24,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 372 transitions, 5763 flow [2024-06-27 17:50:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 17:50:24,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:50:24,106 INFO L175 Difference]: Start difference. First operand has 254 places, 348 transitions, 4953 flow. Second operand 6 states and 168 transitions. [2024-06-27 17:50:24,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 372 transitions, 5763 flow [2024-06-27 17:50:24,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 372 transitions, 5607 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:24,855 INFO L231 Difference]: Finished difference. Result has 258 places, 350 transitions, 4975 flow [2024-06-27 17:50:24,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4975, PETRI_PLACES=258, PETRI_TRANSITIONS=350} [2024-06-27 17:50:24,856 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 209 predicate places. [2024-06-27 17:50:24,856 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 350 transitions, 4975 flow [2024-06-27 17:50:24,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:24,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:24,856 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 17:50:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:50:24,856 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 17:50:24,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash -534884792, now seen corresponding path program 3 times [2024-06-27 17:50:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:24,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312793070] [2024-06-27 17:50:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:24,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312793070] [2024-06-27 17:50:24,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312793070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:24,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:24,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439155437] [2024-06-27 17:50:24,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:24,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:24,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 350 transitions, 4975 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:24,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:24,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:24,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:25,861 INFO L124 PetriNetUnfolderBase]: 3956/6597 cut-off events. [2024-06-27 17:50:25,861 INFO L125 PetriNetUnfolderBase]: For 249230/249236 co-relation queries the response was YES. [2024-06-27 17:50:25,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41496 conditions, 6597 events. 3956/6597 cut-off events. For 249230/249236 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45921 event pairs, 763 based on Foata normal form. 24/6594 useless extension candidates. Maximal degree in co-relation 41381. Up to 5370 conditions per place. [2024-06-27 17:50:25,928 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 308 selfloop transitions, 65 changer transitions 0/386 dead transitions. [2024-06-27 17:50:25,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 386 transitions, 5868 flow [2024-06-27 17:50:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:50:25,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:50:25,929 INFO L175 Difference]: Start difference. First operand has 258 places, 350 transitions, 4975 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:50:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 386 transitions, 5868 flow [2024-06-27 17:50:26,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 386 transitions, 5720 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:26,607 INFO L231 Difference]: Finished difference. Result has 260 places, 352 transitions, 5018 flow [2024-06-27 17:50:26,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4827, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5018, PETRI_PLACES=260, PETRI_TRANSITIONS=352} [2024-06-27 17:50:26,608 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 211 predicate places. [2024-06-27 17:50:26,608 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 352 transitions, 5018 flow [2024-06-27 17:50:26,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:26,608 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 17:50:26,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:50:26,608 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:26,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1220229186, now seen corresponding path program 1 times [2024-06-27 17:50:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661591379] [2024-06-27 17:50:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:26,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:26,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661591379] [2024-06-27 17:50:26,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661591379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:26,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:26,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:26,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928664267] [2024-06-27 17:50:26,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:26,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:26,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 17:50:26,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 352 transitions, 5018 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 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 17:50:26,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:26,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 17:50:26,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:28,182 INFO L124 PetriNetUnfolderBase]: 5742/10092 cut-off events. [2024-06-27 17:50:28,182 INFO L125 PetriNetUnfolderBase]: For 286433/287287 co-relation queries the response was YES. [2024-06-27 17:50:28,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59975 conditions, 10092 events. 5742/10092 cut-off events. For 286433/287287 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 81422 event pairs, 1176 based on Foata normal form. 468/10022 useless extension candidates. Maximal degree in co-relation 59859. Up to 3436 conditions per place. [2024-06-27 17:50:28,288 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 233 selfloop transitions, 271 changer transitions 83/756 dead transitions. [2024-06-27 17:50:28,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 756 transitions, 11561 flow [2024-06-27 17:50:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-27 17:50:28,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-27 17:50:28,289 INFO L175 Difference]: Start difference. First operand has 260 places, 352 transitions, 5018 flow. Second operand 7 states and 223 transitions. [2024-06-27 17:50:28,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 756 transitions, 11561 flow [2024-06-27 17:50:29,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 756 transitions, 11263 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:29,760 INFO L231 Difference]: Finished difference. Result has 268 places, 532 transitions, 8811 flow [2024-06-27 17:50:29,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8811, PETRI_PLACES=268, PETRI_TRANSITIONS=532} [2024-06-27 17:50:29,762 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 219 predicate places. [2024-06-27 17:50:29,763 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 532 transitions, 8811 flow [2024-06-27 17:50:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 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 17:50:29,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:29,763 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 17:50:29,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:50:29,763 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 17:50:29,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:29,764 INFO L85 PathProgramCache]: Analyzing trace with hash -403953882, now seen corresponding path program 1 times [2024-06-27 17:50:29,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:29,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058603255] [2024-06-27 17:50:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:29,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058603255] [2024-06-27 17:50:29,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058603255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:29,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:29,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:29,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046304454] [2024-06-27 17:50:29,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:29,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:29,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:29,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:29,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 532 transitions, 8811 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:29,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,029 INFO L124 PetriNetUnfolderBase]: 6977/11833 cut-off events. [2024-06-27 17:50:32,030 INFO L125 PetriNetUnfolderBase]: For 430533/430896 co-relation queries the response was YES. [2024-06-27 17:50:32,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80795 conditions, 11833 events. 6977/11833 cut-off events. For 430533/430896 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 90839 event pairs, 2229 based on Foata normal form. 191/11912 useless extension candidates. Maximal degree in co-relation 80673. Up to 9653 conditions per place. [2024-06-27 17:50:32,162 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 349 selfloop transitions, 62 changer transitions 169/594 dead transitions. [2024-06-27 17:50:32,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 594 transitions, 10411 flow [2024-06-27 17:50:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 17:50:32,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 17:50:32,163 INFO L175 Difference]: Start difference. First operand has 268 places, 532 transitions, 8811 flow. Second operand 8 states and 230 transitions. [2024-06-27 17:50:32,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 594 transitions, 10411 flow [2024-06-27 17:50:34,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 594 transitions, 10387 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:34,274 INFO L231 Difference]: Finished difference. Result has 276 places, 378 transitions, 6010 flow [2024-06-27 17:50:34,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8803, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=276, PETRI_TRANSITIONS=378} [2024-06-27 17:50:34,274 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 227 predicate places. [2024-06-27 17:50:34,274 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 378 transitions, 6010 flow [2024-06-27 17:50:34,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,275 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 17:50:34,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:50:34,275 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 17:50:34,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1361022820, now seen corresponding path program 2 times [2024-06-27 17:50:34,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005250363] [2024-06-27 17:50:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005250363] [2024-06-27 17:50:34,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005250363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491893731] [2024-06-27 17:50:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:34,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:34,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 378 transitions, 6010 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:34,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,415 INFO L124 PetriNetUnfolderBase]: 5552/9407 cut-off events. [2024-06-27 17:50:36,415 INFO L125 PetriNetUnfolderBase]: For 419792/420170 co-relation queries the response was YES. [2024-06-27 17:50:36,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66871 conditions, 9407 events. 5552/9407 cut-off events. For 419792/420170 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 69369 event pairs, 1446 based on Foata normal form. 269/9553 useless extension candidates. Maximal degree in co-relation 66746. Up to 7941 conditions per place. [2024-06-27 17:50:36,498 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 351 selfloop transitions, 58 changer transitions 0/423 dead transitions. [2024-06-27 17:50:36,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 423 transitions, 7146 flow [2024-06-27 17:50:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:50:36,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 17:50:36,499 INFO L175 Difference]: Start difference. First operand has 276 places, 378 transitions, 6010 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:50:36,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 423 transitions, 7146 flow [2024-06-27 17:50:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 423 transitions, 7072 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:37,689 INFO L231 Difference]: Finished difference. Result has 278 places, 380 transitions, 6094 flow [2024-06-27 17:50:37,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6094, PETRI_PLACES=278, PETRI_TRANSITIONS=380} [2024-06-27 17:50:37,690 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 229 predicate places. [2024-06-27 17:50:37,690 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 380 transitions, 6094 flow [2024-06-27 17:50:37,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,690 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 17:50:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:50:37,690 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 17:50:37,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1862035222, now seen corresponding path program 3 times [2024-06-27 17:50:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002724922] [2024-06-27 17:50:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:37,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002724922] [2024-06-27 17:50:37,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002724922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:37,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238256871] [2024-06-27 17:50:37,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:37,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:37,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 380 transitions, 6094 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:37,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:39,521 INFO L124 PetriNetUnfolderBase]: 5546/9246 cut-off events. [2024-06-27 17:50:39,522 INFO L125 PetriNetUnfolderBase]: For 419746/420124 co-relation queries the response was YES. [2024-06-27 17:50:39,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66503 conditions, 9246 events. 5546/9246 cut-off events. For 419746/420124 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 66821 event pairs, 1368 based on Foata normal form. 271/9391 useless extension candidates. Maximal degree in co-relation 66376. Up to 8033 conditions per place. [2024-06-27 17:50:39,626 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 349 selfloop transitions, 56 changer transitions 0/419 dead transitions. [2024-06-27 17:50:39,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 419 transitions, 7046 flow [2024-06-27 17:50:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 17:50:39,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 17:50:39,627 INFO L175 Difference]: Start difference. First operand has 278 places, 380 transitions, 6094 flow. Second operand 8 states and 222 transitions. [2024-06-27 17:50:39,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 419 transitions, 7046 flow [2024-06-27 17:50:41,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 419 transitions, 6967 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:41,122 INFO L231 Difference]: Finished difference. Result has 282 places, 380 transitions, 6132 flow [2024-06-27 17:50:41,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6132, PETRI_PLACES=282, PETRI_TRANSITIONS=380} [2024-06-27 17:50:41,123 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 233 predicate places. [2024-06-27 17:50:41,123 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 380 transitions, 6132 flow [2024-06-27 17:50:41,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:41,123 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 17:50:41,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:50:41,124 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 17:50:41,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1183863400, now seen corresponding path program 1 times [2024-06-27 17:50:41,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:41,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972256478] [2024-06-27 17:50:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:41,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:41,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:41,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972256478] [2024-06-27 17:50:41,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972256478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:41,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:41,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957672350] [2024-06-27 17:50:41,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:41,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:41,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:41,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:41,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:41,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 380 transitions, 6132 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:41,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:41,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:42,946 INFO L124 PetriNetUnfolderBase]: 5600/9250 cut-off events. [2024-06-27 17:50:42,946 INFO L125 PetriNetUnfolderBase]: For 423933/424346 co-relation queries the response was YES. [2024-06-27 17:50:43,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67359 conditions, 9250 events. 5600/9250 cut-off events. For 423933/424346 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 66332 event pairs, 1299 based on Foata normal form. 305/9416 useless extension candidates. Maximal degree in co-relation 67230. Up to 7649 conditions per place. [2024-06-27 17:50:43,067 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 276 selfloop transitions, 126 changer transitions 2/418 dead transitions. [2024-06-27 17:50:43,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 418 transitions, 7334 flow [2024-06-27 17:50:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:50:43,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:50:43,068 INFO L175 Difference]: Start difference. First operand has 282 places, 380 transitions, 6132 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:50:43,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 418 transitions, 7334 flow [2024-06-27 17:50:44,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 418 transitions, 7217 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:44,670 INFO L231 Difference]: Finished difference. Result has 282 places, 383 transitions, 6321 flow [2024-06-27 17:50:44,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6321, PETRI_PLACES=282, PETRI_TRANSITIONS=383} [2024-06-27 17:50:44,671 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 233 predicate places. [2024-06-27 17:50:44,671 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 383 transitions, 6321 flow [2024-06-27 17:50:44,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:44,671 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 17:50:44,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:50:44,671 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 17:50:44,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1049920166, now seen corresponding path program 1 times [2024-06-27 17:50:44,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:44,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011914707] [2024-06-27 17:50:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:44,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:44,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011914707] [2024-06-27 17:50:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011914707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:44,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:44,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:44,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888334208] [2024-06-27 17:50:44,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:44,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:44,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 383 transitions, 6321 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:44,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:44,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:46,499 INFO L124 PetriNetUnfolderBase]: 5635/9289 cut-off events. [2024-06-27 17:50:46,499 INFO L125 PetriNetUnfolderBase]: For 441977/442360 co-relation queries the response was YES. [2024-06-27 17:50:46,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68665 conditions, 9289 events. 5635/9289 cut-off events. For 441977/442360 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 66575 event pairs, 1251 based on Foata normal form. 290/9443 useless extension candidates. Maximal degree in co-relation 68535. Up to 7035 conditions per place. [2024-06-27 17:50:46,599 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 220 selfloop transitions, 205 changer transitions 2/441 dead transitions. [2024-06-27 17:50:46,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 441 transitions, 8157 flow [2024-06-27 17:50:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:50:46,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 17:50:46,600 INFO L175 Difference]: Start difference. First operand has 282 places, 383 transitions, 6321 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:50:46,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 441 transitions, 8157 flow [2024-06-27 17:50:48,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 441 transitions, 7742 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:48,313 INFO L231 Difference]: Finished difference. Result has 284 places, 398 transitions, 6694 flow [2024-06-27 17:50:48,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6694, PETRI_PLACES=284, PETRI_TRANSITIONS=398} [2024-06-27 17:50:48,314 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 235 predicate places. [2024-06-27 17:50:48,314 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 398 transitions, 6694 flow [2024-06-27 17:50:48,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:48,314 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 17:50:48,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:50:48,314 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 17:50:48,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash 693726688, now seen corresponding path program 2 times [2024-06-27 17:50:48,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:48,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313724508] [2024-06-27 17:50:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:48,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313724508] [2024-06-27 17:50:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313724508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:48,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:48,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058152952] [2024-06-27 17:50:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:48,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:48,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:48,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:48,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 398 transitions, 6694 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:48,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:48,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:50,146 INFO L124 PetriNetUnfolderBase]: 5674/9331 cut-off events. [2024-06-27 17:50:50,146 INFO L125 PetriNetUnfolderBase]: For 460073/460537 co-relation queries the response was YES. [2024-06-27 17:50:50,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70489 conditions, 9331 events. 5674/9331 cut-off events. For 460073/460537 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 66787 event pairs, 1240 based on Foata normal form. 297/9485 useless extension candidates. Maximal degree in co-relation 70360. Up to 7748 conditions per place. [2024-06-27 17:50:50,418 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 277 selfloop transitions, 149 changer transitions 2/442 dead transitions. [2024-06-27 17:50:50,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 442 transitions, 7952 flow [2024-06-27 17:50:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:50:50,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:50:50,419 INFO L175 Difference]: Start difference. First operand has 284 places, 398 transitions, 6694 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:50:50,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 442 transitions, 7952 flow [2024-06-27 17:50:51,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 442 transitions, 7767 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:51,836 INFO L231 Difference]: Finished difference. Result has 290 places, 401 transitions, 6843 flow [2024-06-27 17:50:51,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6843, PETRI_PLACES=290, PETRI_TRANSITIONS=401} [2024-06-27 17:50:51,837 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 241 predicate places. [2024-06-27 17:50:51,837 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 401 transitions, 6843 flow [2024-06-27 17:50:51,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:51,837 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 17:50:51,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:50:51,837 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 17:50:51,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1861801048, now seen corresponding path program 2 times [2024-06-27 17:50:51,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:51,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271057794] [2024-06-27 17:50:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:51,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:51,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:51,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271057794] [2024-06-27 17:50:51,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271057794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:51,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:51,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:51,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308599883] [2024-06-27 17:50:51,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:51,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:51,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:51,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:51,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:51,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 401 transitions, 6843 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:51,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:51,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:53,726 INFO L124 PetriNetUnfolderBase]: 5711/9450 cut-off events. [2024-06-27 17:50:53,726 INFO L125 PetriNetUnfolderBase]: For 469122/469540 co-relation queries the response was YES. [2024-06-27 17:50:53,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70114 conditions, 9450 events. 5711/9450 cut-off events. For 469122/469540 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 68278 event pairs, 1283 based on Foata normal form. 315/9624 useless extension candidates. Maximal degree in co-relation 69982. Up to 7097 conditions per place. [2024-06-27 17:50:53,824 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 224 selfloop transitions, 213 changer transitions 1/452 dead transitions. [2024-06-27 17:50:53,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 452 transitions, 8687 flow [2024-06-27 17:50:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:50:53,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 17:50:53,825 INFO L175 Difference]: Start difference. First operand has 290 places, 401 transitions, 6843 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:50:53,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 452 transitions, 8687 flow [2024-06-27 17:50:55,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 452 transitions, 8455 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:55,687 INFO L231 Difference]: Finished difference. Result has 293 places, 411 transitions, 7253 flow [2024-06-27 17:50:55,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6611, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7253, PETRI_PLACES=293, PETRI_TRANSITIONS=411} [2024-06-27 17:50:55,690 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 244 predicate places. [2024-06-27 17:50:55,690 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 411 transitions, 7253 flow [2024-06-27 17:50:55,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:55,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:55,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:55,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:50:55,691 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:55,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1889836512, now seen corresponding path program 3 times [2024-06-27 17:50:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236747346] [2024-06-27 17:50:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:55,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:55,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:55,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236747346] [2024-06-27 17:50:55,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236747346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:55,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:55,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:55,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888679617] [2024-06-27 17:50:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:55,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:55,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 411 transitions, 7253 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:55,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:55,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:55,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:57,660 INFO L124 PetriNetUnfolderBase]: 5767/9488 cut-off events. [2024-06-27 17:50:57,660 INFO L125 PetriNetUnfolderBase]: For 487444/487901 co-relation queries the response was YES. [2024-06-27 17:50:57,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71461 conditions, 9488 events. 5767/9488 cut-off events. For 487444/487901 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 68093 event pairs, 1242 based on Foata normal form. 299/9642 useless extension candidates. Maximal degree in co-relation 71327. Up to 7867 conditions per place. [2024-06-27 17:50:57,772 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 287 selfloop transitions, 156 changer transitions 2/459 dead transitions. [2024-06-27 17:50:57,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 459 transitions, 8731 flow [2024-06-27 17:50:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-27 17:50:57,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6271604938271605 [2024-06-27 17:50:57,773 INFO L175 Difference]: Start difference. First operand has 293 places, 411 transitions, 7253 flow. Second operand 9 states and 254 transitions. [2024-06-27 17:50:57,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 459 transitions, 8731 flow [2024-06-27 17:50:59,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 459 transitions, 8337 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:59,536 INFO L231 Difference]: Finished difference. Result has 299 places, 417 transitions, 7251 flow [2024-06-27 17:50:59,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6867, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7251, PETRI_PLACES=299, PETRI_TRANSITIONS=417} [2024-06-27 17:50:59,537 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 250 predicate places. [2024-06-27 17:50:59,537 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 417 transitions, 7251 flow [2024-06-27 17:50:59,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:59,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:59,537 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 17:50:59,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:50:59,537 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 17:50:59,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1862038198, now seen corresponding path program 3 times [2024-06-27 17:50:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:59,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4465642] [2024-06-27 17:50:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:59,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:59,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4465642] [2024-06-27 17:50:59,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4465642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:59,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616410867] [2024-06-27 17:50:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:59,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:59,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 417 transitions, 7251 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:59,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:59,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:59,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:01,454 INFO L124 PetriNetUnfolderBase]: 5738/9466 cut-off events. [2024-06-27 17:51:01,455 INFO L125 PetriNetUnfolderBase]: For 494577/494978 co-relation queries the response was YES. [2024-06-27 17:51:01,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70673 conditions, 9466 events. 5738/9466 cut-off events. For 494577/494978 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 68122 event pairs, 1257 based on Foata normal form. 300/9625 useless extension candidates. Maximal degree in co-relation 70538. Up to 7117 conditions per place. [2024-06-27 17:51:01,563 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 223 selfloop transitions, 220 changer transitions 0/457 dead transitions. [2024-06-27 17:51:01,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 457 transitions, 8781 flow [2024-06-27 17:51:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:51:01,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 17:51:01,564 INFO L175 Difference]: Start difference. First operand has 299 places, 417 transitions, 7251 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:51:01,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 457 transitions, 8781 flow [2024-06-27 17:51:03,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 457 transitions, 8417 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:03,675 INFO L231 Difference]: Finished difference. Result has 301 places, 417 transitions, 7333 flow [2024-06-27 17:51:03,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6887, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7333, PETRI_PLACES=301, PETRI_TRANSITIONS=417} [2024-06-27 17:51:03,676 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 252 predicate places. [2024-06-27 17:51:03,676 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 417 transitions, 7333 flow [2024-06-27 17:51:03,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:03,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:03,676 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 17:51:03,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:51:03,676 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 17:51:03,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1664921888, now seen corresponding path program 4 times [2024-06-27 17:51:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:03,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513346816] [2024-06-27 17:51:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:03,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:03,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513346816] [2024-06-27 17:51:03,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513346816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:03,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:03,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:03,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730813842] [2024-06-27 17:51:03,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:03,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:03,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:03,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:03,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 417 transitions, 7333 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:03,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:03,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:03,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:05,711 INFO L124 PetriNetUnfolderBase]: 5796/9656 cut-off events. [2024-06-27 17:51:05,711 INFO L125 PetriNetUnfolderBase]: For 521944/522347 co-relation queries the response was YES. [2024-06-27 17:51:05,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71879 conditions, 9656 events. 5796/9656 cut-off events. For 521944/522347 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 70293 event pairs, 1373 based on Foata normal form. 261/9784 useless extension candidates. Maximal degree in co-relation 71743. Up to 8387 conditions per place. [2024-06-27 17:51:05,816 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 383 selfloop transitions, 54 changer transitions 0/451 dead transitions. [2024-06-27 17:51:05,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 451 transitions, 8349 flow [2024-06-27 17:51:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 17:51:05,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-27 17:51:05,817 INFO L175 Difference]: Start difference. First operand has 301 places, 417 transitions, 7333 flow. Second operand 8 states and 218 transitions. [2024-06-27 17:51:05,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 451 transitions, 8349 flow [2024-06-27 17:51:07,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 451 transitions, 7911 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:07,928 INFO L231 Difference]: Finished difference. Result has 303 places, 418 transitions, 7030 flow [2024-06-27 17:51:07,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7030, PETRI_PLACES=303, PETRI_TRANSITIONS=418} [2024-06-27 17:51:07,929 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2024-06-27 17:51:07,929 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 418 transitions, 7030 flow [2024-06-27 17:51:07,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:07,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:07,929 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 17:51:07,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:51:07,929 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 17:51:07,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1664595458, now seen corresponding path program 5 times [2024-06-27 17:51:07,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:07,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663100553] [2024-06-27 17:51:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663100553] [2024-06-27 17:51:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663100553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:08,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971029938] [2024-06-27 17:51:08,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:08,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:08,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 418 transitions, 7030 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:08,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:08,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:08,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:09,961 INFO L124 PetriNetUnfolderBase]: 6020/10096 cut-off events. [2024-06-27 17:51:09,961 INFO L125 PetriNetUnfolderBase]: For 547679/547998 co-relation queries the response was YES. [2024-06-27 17:51:10,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74212 conditions, 10096 events. 6020/10096 cut-off events. For 547679/547998 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 74225 event pairs, 1641 based on Foata normal form. 259/10282 useless extension candidates. Maximal degree in co-relation 74075. Up to 8567 conditions per place. [2024-06-27 17:51:10,281 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 386 selfloop transitions, 57 changer transitions 0/457 dead transitions. [2024-06-27 17:51:10,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 457 transitions, 8238 flow [2024-06-27 17:51:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 17:51:10,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-27 17:51:10,282 INFO L175 Difference]: Start difference. First operand has 303 places, 418 transitions, 7030 flow. Second operand 8 states and 221 transitions. [2024-06-27 17:51:10,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 457 transitions, 8238 flow [2024-06-27 17:51:12,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 457 transitions, 8125 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:12,239 INFO L231 Difference]: Finished difference. Result has 305 places, 420 transitions, 7081 flow [2024-06-27 17:51:12,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6917, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7081, PETRI_PLACES=305, PETRI_TRANSITIONS=420} [2024-06-27 17:51:12,240 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 256 predicate places. [2024-06-27 17:51:12,240 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 420 transitions, 7081 flow [2024-06-27 17:51:12,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:12,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:12,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:12,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:51:12,240 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 17:51:12,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2118634676, now seen corresponding path program 6 times [2024-06-27 17:51:12,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:12,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867201578] [2024-06-27 17:51:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:12,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:12,317 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 17:51:12,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867201578] [2024-06-27 17:51:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867201578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:12,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115203854] [2024-06-27 17:51:12,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:12,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:12,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:12,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:12,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 420 transitions, 7081 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:12,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:12,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:12,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:14,383 INFO L124 PetriNetUnfolderBase]: 6002/10070 cut-off events. [2024-06-27 17:51:14,383 INFO L125 PetriNetUnfolderBase]: For 546199/546518 co-relation queries the response was YES. [2024-06-27 17:51:14,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73695 conditions, 10070 events. 6002/10070 cut-off events. For 546199/546518 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 74169 event pairs, 1648 based on Foata normal form. 261/10258 useless extension candidates. Maximal degree in co-relation 73557. Up to 8722 conditions per place. [2024-06-27 17:51:14,498 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 384 selfloop transitions, 55 changer transitions 0/453 dead transitions. [2024-06-27 17:51:14,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 453 transitions, 8081 flow [2024-06-27 17:51:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 17:51:14,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-27 17:51:14,499 INFO L175 Difference]: Start difference. First operand has 305 places, 420 transitions, 7081 flow. Second operand 8 states and 217 transitions. [2024-06-27 17:51:14,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 453 transitions, 8081 flow [2024-06-27 17:51:16,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 453 transitions, 8000 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:16,668 INFO L231 Difference]: Finished difference. Result has 309 places, 420 transitions, 7115 flow [2024-06-27 17:51:16,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7000, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7115, PETRI_PLACES=309, PETRI_TRANSITIONS=420} [2024-06-27 17:51:16,668 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 260 predicate places. [2024-06-27 17:51:16,669 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 420 transitions, 7115 flow [2024-06-27 17:51:16,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:16,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:16,669 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 17:51:16,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:51:16,669 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 17:51:16,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash 963608346, now seen corresponding path program 4 times [2024-06-27 17:51:16,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:16,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804978293] [2024-06-27 17:51:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804978293] [2024-06-27 17:51:16,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804978293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:16,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:16,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:16,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670268999] [2024-06-27 17:51:16,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:16,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:16,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:16,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:16,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:16,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 420 transitions, 7115 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:16,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:16,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:16,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:18,706 INFO L124 PetriNetUnfolderBase]: 6025/9915 cut-off events. [2024-06-27 17:51:18,707 INFO L125 PetriNetUnfolderBase]: For 553204/553685 co-relation queries the response was YES. [2024-06-27 17:51:18,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73840 conditions, 9915 events. 6025/9915 cut-off events. For 553204/553685 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 71687 event pairs, 1313 based on Foata normal form. 341/10115 useless extension candidates. Maximal degree in co-relation 73700. Up to 8343 conditions per place. [2024-06-27 17:51:18,831 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 319 selfloop transitions, 126 changer transitions 2/461 dead transitions. [2024-06-27 17:51:18,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 461 transitions, 8526 flow [2024-06-27 17:51:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:51:18,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:51:18,832 INFO L175 Difference]: Start difference. First operand has 309 places, 420 transitions, 7115 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:51:18,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 461 transitions, 8526 flow [2024-06-27 17:51:21,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 461 transitions, 8406 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:21,672 INFO L231 Difference]: Finished difference. Result has 308 places, 432 transitions, 7407 flow [2024-06-27 17:51:21,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7407, PETRI_PLACES=308, PETRI_TRANSITIONS=432} [2024-06-27 17:51:21,673 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 259 predicate places. [2024-06-27 17:51:21,673 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 432 transitions, 7407 flow [2024-06-27 17:51:21,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:21,673 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 17:51:21,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:51:21,673 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 17:51:21,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1017523594, now seen corresponding path program 5 times [2024-06-27 17:51:21,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789626172] [2024-06-27 17:51:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:21,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:21,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789626172] [2024-06-27 17:51:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789626172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:21,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:21,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089297093] [2024-06-27 17:51:21,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:21,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:21,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 432 transitions, 7407 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:21,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:21,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:23,769 INFO L124 PetriNetUnfolderBase]: 5997/9968 cut-off events. [2024-06-27 17:51:23,769 INFO L125 PetriNetUnfolderBase]: For 562781/563276 co-relation queries the response was YES. [2024-06-27 17:51:23,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74093 conditions, 9968 events. 5997/9968 cut-off events. For 562781/563276 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 73041 event pairs, 1370 based on Foata normal form. 339/10167 useless extension candidates. Maximal degree in co-relation 73952. Up to 8580 conditions per place. [2024-06-27 17:51:23,874 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 369 selfloop transitions, 86 changer transitions 2/471 dead transitions. [2024-06-27 17:51:23,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 471 transitions, 8458 flow [2024-06-27 17:51:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 17:51:23,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:51:23,875 INFO L175 Difference]: Start difference. First operand has 308 places, 432 transitions, 7407 flow. Second operand 8 states and 224 transitions. [2024-06-27 17:51:23,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 471 transitions, 8458 flow [2024-06-27 17:51:26,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 471 transitions, 8295 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:26,243 INFO L231 Difference]: Finished difference. Result has 314 places, 435 transitions, 7457 flow [2024-06-27 17:51:26,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7247, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=314, PETRI_TRANSITIONS=435} [2024-06-27 17:51:26,243 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 265 predicate places. [2024-06-27 17:51:26,243 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 435 transitions, 7457 flow [2024-06-27 17:51:26,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:26,244 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 17:51:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:51:26,244 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 17:51:26,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 963728502, now seen corresponding path program 4 times [2024-06-27 17:51:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:26,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213611473] [2024-06-27 17:51:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:26,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:26,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213611473] [2024-06-27 17:51:26,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213611473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:26,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:26,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:26,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731255258] [2024-06-27 17:51:26,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:26,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:26,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:26,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:26,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:26,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 435 transitions, 7457 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:28,349 INFO L124 PetriNetUnfolderBase]: 6044/10492 cut-off events. [2024-06-27 17:51:28,349 INFO L125 PetriNetUnfolderBase]: For 585362/585799 co-relation queries the response was YES. [2024-06-27 17:51:28,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75737 conditions, 10492 events. 6044/10492 cut-off events. For 585362/585799 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 80941 event pairs, 1591 based on Foata normal form. 348/10730 useless extension candidates. Maximal degree in co-relation 75595. Up to 8294 conditions per place. [2024-06-27 17:51:28,469 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 335 selfloop transitions, 135 changer transitions 2/486 dead transitions. [2024-06-27 17:51:28,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 486 transitions, 9153 flow [2024-06-27 17:51:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:51:28,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 17:51:28,471 INFO L175 Difference]: Start difference. First operand has 314 places, 435 transitions, 7457 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:51:28,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 486 transitions, 9153 flow [2024-06-27 17:51:31,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 486 transitions, 8981 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:31,469 INFO L231 Difference]: Finished difference. Result has 317 places, 447 transitions, 7802 flow [2024-06-27 17:51:31,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7285, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7802, PETRI_PLACES=317, PETRI_TRANSITIONS=447} [2024-06-27 17:51:31,469 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 268 predicate places. [2024-06-27 17:51:31,470 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 447 transitions, 7802 flow [2024-06-27 17:51:31,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:31,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:31,470 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 17:51:31,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:51:31,470 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 17:51:31,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:31,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1854289350, now seen corresponding path program 6 times [2024-06-27 17:51:31,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:31,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285125324] [2024-06-27 17:51:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:31,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:31,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:31,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285125324] [2024-06-27 17:51:31,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285125324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:31,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:31,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:31,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012558627] [2024-06-27 17:51:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:31,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:31,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:31,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:31,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 447 transitions, 7802 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:31,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:31,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:31,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:33,512 INFO L124 PetriNetUnfolderBase]: 6126/10123 cut-off events. [2024-06-27 17:51:33,513 INFO L125 PetriNetUnfolderBase]: For 603921/604408 co-relation queries the response was YES. [2024-06-27 17:51:33,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76562 conditions, 10123 events. 6126/10123 cut-off events. For 603921/604408 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 73771 event pairs, 1295 based on Foata normal form. 372/10385 useless extension candidates. Maximal degree in co-relation 76418. Up to 8490 conditions per place. [2024-06-27 17:51:33,617 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 329 selfloop transitions, 146 changer transitions 3/492 dead transitions. [2024-06-27 17:51:33,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 492 transitions, 9354 flow [2024-06-27 17:51:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:51:33,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:51:33,618 INFO L175 Difference]: Start difference. First operand has 317 places, 447 transitions, 7802 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:51:33,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 492 transitions, 9354 flow [2024-06-27 17:51:36,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 492 transitions, 9142 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:36,091 INFO L231 Difference]: Finished difference. Result has 322 places, 450 transitions, 7925 flow [2024-06-27 17:51:36,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7925, PETRI_PLACES=322, PETRI_TRANSITIONS=450} [2024-06-27 17:51:36,092 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 273 predicate places. [2024-06-27 17:51:36,092 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 450 transitions, 7925 flow [2024-06-27 17:51:36,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:36,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:36,092 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 17:51:36,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:51:36,093 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 17:51:36,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:36,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1023064534, now seen corresponding path program 7 times [2024-06-27 17:51:36,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:36,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065859856] [2024-06-27 17:51:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:36,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:36,160 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 17:51:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:36,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065859856] [2024-06-27 17:51:36,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065859856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:36,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:36,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16360068] [2024-06-27 17:51:36,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:36,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:36,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 450 transitions, 7925 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:36,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:36,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:36,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:38,352 INFO L124 PetriNetUnfolderBase]: 6139/10136 cut-off events. [2024-06-27 17:51:38,352 INFO L125 PetriNetUnfolderBase]: For 615407/615895 co-relation queries the response was YES. [2024-06-27 17:51:38,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76833 conditions, 10136 events. 6139/10136 cut-off events. For 615407/615895 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 73786 event pairs, 1297 based on Foata normal form. 365/10385 useless extension candidates. Maximal degree in co-relation 76688. Up to 8505 conditions per place. [2024-06-27 17:51:38,474 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 324 selfloop transitions, 153 changer transitions 3/494 dead transitions. [2024-06-27 17:51:38,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 494 transitions, 9345 flow [2024-06-27 17:51:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-27 17:51:38,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6197530864197531 [2024-06-27 17:51:38,475 INFO L175 Difference]: Start difference. First operand has 322 places, 450 transitions, 7925 flow. Second operand 9 states and 251 transitions. [2024-06-27 17:51:38,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 494 transitions, 9345 flow [2024-06-27 17:51:41,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 494 transitions, 8926 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:41,621 INFO L231 Difference]: Finished difference. Result has 324 places, 453 transitions, 7860 flow [2024-06-27 17:51:41,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7860, PETRI_PLACES=324, PETRI_TRANSITIONS=453} [2024-06-27 17:51:41,622 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 275 predicate places. [2024-06-27 17:51:41,622 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 453 transitions, 7860 flow [2024-06-27 17:51:41,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:41,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:41,622 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 17:51:41,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:51:41,623 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 17:51:41,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:41,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1714062346, now seen corresponding path program 1 times [2024-06-27 17:51:41,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:41,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260585305] [2024-06-27 17:51:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:41,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260585305] [2024-06-27 17:51:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260585305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:41,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:41,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962584745] [2024-06-27 17:51:41,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:41,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:41,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 453 transitions, 7860 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:41,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:41,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:41,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:43,775 INFO L124 PetriNetUnfolderBase]: 6123/10178 cut-off events. [2024-06-27 17:51:43,775 INFO L125 PetriNetUnfolderBase]: For 623993/624420 co-relation queries the response was YES. [2024-06-27 17:51:43,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76614 conditions, 10178 events. 6123/10178 cut-off events. For 623993/624420 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 74787 event pairs, 1334 based on Foata normal form. 342/10384 useless extension candidates. Maximal degree in co-relation 76468. Up to 8492 conditions per place. [2024-06-27 17:51:43,881 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 357 selfloop transitions, 124 changer transitions 3/498 dead transitions. [2024-06-27 17:51:43,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 498 transitions, 9515 flow [2024-06-27 17:51:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:51:43,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:51:43,882 INFO L175 Difference]: Start difference. First operand has 324 places, 453 transitions, 7860 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:51:43,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 498 transitions, 9515 flow [2024-06-27 17:51:46,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 498 transitions, 9249 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:46,678 INFO L231 Difference]: Finished difference. Result has 326 places, 462 transitions, 7979 flow [2024-06-27 17:51:46,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7594, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7979, PETRI_PLACES=326, PETRI_TRANSITIONS=462} [2024-06-27 17:51:46,679 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 277 predicate places. [2024-06-27 17:51:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 462 transitions, 7979 flow [2024-06-27 17:51:46,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:46,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:46,679 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 17:51:46,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:51:46,679 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 17:51:46,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash 472302354, now seen corresponding path program 8 times [2024-06-27 17:51:46,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:46,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861993579] [2024-06-27 17:51:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:46,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:46,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:46,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861993579] [2024-06-27 17:51:46,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861993579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:46,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:46,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:46,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429545312] [2024-06-27 17:51:46,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:46,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:46,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:46,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:46,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 462 transitions, 7979 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:46,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:46,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:46,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:48,904 INFO L124 PetriNetUnfolderBase]: 6142/10594 cut-off events. [2024-06-27 17:51:48,904 INFO L125 PetriNetUnfolderBase]: For 644813/645296 co-relation queries the response was YES. [2024-06-27 17:51:48,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77688 conditions, 10594 events. 6142/10594 cut-off events. For 644813/645296 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 81483 event pairs, 1602 based on Foata normal form. 345/10819 useless extension candidates. Maximal degree in co-relation 77541. Up to 8757 conditions per place. [2024-06-27 17:51:49,029 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 402 selfloop transitions, 93 changer transitions 5/514 dead transitions. [2024-06-27 17:51:49,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 514 transitions, 9343 flow [2024-06-27 17:51:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:51:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:51:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-06-27 17:51:49,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-06-27 17:51:49,030 INFO L175 Difference]: Start difference. First operand has 326 places, 462 transitions, 7979 flow. Second operand 11 states and 294 transitions. [2024-06-27 17:51:49,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 514 transitions, 9343 flow [2024-06-27 17:51:52,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 514 transitions, 9121 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:52,442 INFO L231 Difference]: Finished difference. Result has 335 places, 468 transitions, 8041 flow [2024-06-27 17:51:52,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7757, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8041, PETRI_PLACES=335, PETRI_TRANSITIONS=468} [2024-06-27 17:51:52,442 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 286 predicate places. [2024-06-27 17:51:52,442 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 468 transitions, 8041 flow [2024-06-27 17:51:52,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:52,442 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 17:51:52,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:51:52,443 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 17:51:52,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash 472296774, now seen corresponding path program 9 times [2024-06-27 17:51:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:52,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240502933] [2024-06-27 17:51:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:52,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:52,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:52,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240502933] [2024-06-27 17:51:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240502933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535173352] [2024-06-27 17:51:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:52,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 468 transitions, 8041 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:52,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand