./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe032_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/safe032_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe032_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 17:57:41,412 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:57:41,464 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:57:41,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:57:41,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:57:41,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:57:41,500 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:57:41,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:57:41,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:57:41,504 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:57:41,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:57:41,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:57:41,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:57:41,506 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:57:41,506 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:57:41,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:57:41,507 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:57:41,507 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:57:41,507 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:57:41,508 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:57:41,508 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:57:41,508 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:57:41,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:57:41,509 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:57:41,509 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:57:41,509 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:57:41,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:57:41,509 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:57:41,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:57:41,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:57:41,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:57:41,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:57:41,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:57:41,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:57:41,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:57:41,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:57:41,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:57:41,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:57:41,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:57:41,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:57:41,513 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:57:41,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:57:41,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:57:41,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:57:41,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:57:41,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:57:41,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:57:41,759 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:57:41,759 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:57:41,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe032_tso.yml/witness.yml [2024-06-27 17:57:41,900 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:57:41,901 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:57:41,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-27 17:57:42,957 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:57:43,139 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:57:43,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-27 17:57:43,153 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2459c8f85/38168927675b4c26887ff2338e33e0cd/FLAG9973efb49 [2024-06-27 17:57:43,162 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2459c8f85/38168927675b4c26887ff2338e33e0cd [2024-06-27 17:57:43,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:57:43,163 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:57:43,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:57:43,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:57:43,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:57:43,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:57:41" (1/2) ... [2024-06-27 17:57:43,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d461131 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:43, skipping insertion in model container [2024-06-27 17:57:43,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:57:41" (1/2) ... [2024-06-27 17:57:43,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66ad95b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:43, skipping insertion in model container [2024-06-27 17:57:43,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:57:43" (2/2) ... [2024-06-27 17:57:43,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d461131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43, skipping insertion in model container [2024-06-27 17:57:43,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:57:43" (2/2) ... [2024-06-27 17:57:43,173 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:57:43,205 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:57:43,206 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 17:57:43,206 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 17:57:43,206 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 17:57:43,206 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:57:43,206 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 17:57:43,228 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:57:43,334 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/safe032_tso.i[945,958] [2024-06-27 17:57:43,477 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:57:43,490 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:57:43,519 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/safe032_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:57:43,572 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:57:43,616 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:57:43,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43 WrapperNode [2024-06-27 17:57:43,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:57:43,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:57:43,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:57:43,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:57:43,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,652 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-06-27 17:57:43,653 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:57:43,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:57:43,653 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:57:43,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:57:43,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,673 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 17:57:43,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,678 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:57:43,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:57:43,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:57:43,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:57:43,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (1/1) ... [2024-06-27 17:57:43,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:57:43,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:57:43,704 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 17:57:43,730 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 17:57:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:57:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:57:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:57:43,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:57:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:57:43,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:57:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:57:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:57:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:57:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:57:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:57:43,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:57:43,761 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 17:57:43,884 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:57:43,887 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:57:44,032 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:57:44,032 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:57:44,100 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:57:44,101 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:57:44,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:57:44 BoogieIcfgContainer [2024-06-27 17:57:44,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:57:44,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:57:44,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:57:44,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:57:44,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:57:41" (1/4) ... [2024-06-27 17:57:44,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dc5e58 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:57:44, skipping insertion in model container [2024-06-27 17:57:44,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:57:43" (2/4) ... [2024-06-27 17:57:44,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dc5e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:57:44, skipping insertion in model container [2024-06-27 17:57:44,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:43" (3/4) ... [2024-06-27 17:57:44,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dc5e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:57:44, skipping insertion in model container [2024-06-27 17:57:44,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:57:44" (4/4) ... [2024-06-27 17:57:44,108 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-27 17:57:44,120 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:57:44,120 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:57:44,120 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:57:44,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:57:44,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 17:57:44,196 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 17:57:44,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:57:44,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 76 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 17:57:44,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 17:57:44,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 17:57:44,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:57:44,243 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;@7d0c2c9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:57:44,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:57:44,252 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:57:44,252 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:57:44,252 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:57:44,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:44,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:57:44,253 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 17:57:44,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash 209467906, now seen corresponding path program 1 times [2024-06-27 17:57:44,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631388106] [2024-06-27 17:57:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:44,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:44,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631388106] [2024-06-27 17:57:44,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631388106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:44,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:44,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:57:44,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146570762] [2024-06-27 17:57:44,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:44,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:57:44,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:57:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:57:44,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-06-27 17:57:44,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:44,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:44,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-06-27 17:57:44,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:44,977 INFO L124 PetriNetUnfolderBase]: 943/1712 cut-off events. [2024-06-27 17:57:44,977 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:57:44,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 1712 events. 943/1712 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10279 event pairs, 677 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 3168. Up to 1411 conditions per place. [2024-06-27 17:57:44,991 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 32 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-06-27 17:57:44,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 193 flow [2024-06-27 17:57:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:57:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:57:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-27 17:57:45,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2024-06-27 17:57:45,003 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 102 transitions. [2024-06-27 17:57:45,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 193 flow [2024-06-27 17:57:45,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:45,010 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 118 flow [2024-06-27 17:57:45,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 17:57:45,016 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 17:57:45,016 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 118 flow [2024-06-27 17:57:45,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:45,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:57:45,017 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 17:57:45,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:45,019 INFO L85 PathProgramCache]: Analyzing trace with hash -564045553, now seen corresponding path program 1 times [2024-06-27 17:57:45,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:45,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997221210] [2024-06-27 17:57:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:45,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:45,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:45,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997221210] [2024-06-27 17:57:45,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997221210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:45,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:45,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:57:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483624596] [2024-06-27 17:57:45,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:45,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:57:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:45,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:57:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:57:45,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-06-27 17:57:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-06-27 17:57:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:45,302 INFO L124 PetriNetUnfolderBase]: 937/1542 cut-off events. [2024-06-27 17:57:45,302 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-27 17:57:45,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1542 events. 937/1542 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8657 event pairs, 421 based on Foata normal form. 3/1498 useless extension candidates. Maximal degree in co-relation 3411. Up to 1383 conditions per place. [2024-06-27 17:57:45,312 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 41 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-06-27 17:57:45,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 268 flow [2024-06-27 17:57:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:57:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:57:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-06-27 17:57:45,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7180851063829787 [2024-06-27 17:57:45,317 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 118 flow. Second operand 4 states and 135 transitions. [2024-06-27 17:57:45,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 268 flow [2024-06-27 17:57:45,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:45,320 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 154 flow [2024-06-27 17:57:45,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-27 17:57:45,321 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2024-06-27 17:57:45,321 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 154 flow [2024-06-27 17:57:45,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:45,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:45,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:57:45,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:45,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:45,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1804040492, now seen corresponding path program 1 times [2024-06-27 17:57:45,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:45,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739051371] [2024-06-27 17:57:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:45,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:45,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739051371] [2024-06-27 17:57:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739051371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:45,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:45,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:57:45,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554198950] [2024-06-27 17:57:45,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:45,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:57:45,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:57:45,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:57:45,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:45,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:45,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:45,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:45,625 INFO L124 PetriNetUnfolderBase]: 1542/2473 cut-off events. [2024-06-27 17:57:45,625 INFO L125 PetriNetUnfolderBase]: For 1090/1090 co-relation queries the response was YES. [2024-06-27 17:57:45,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 2473 events. 1542/2473 cut-off events. For 1090/1090 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14313 event pairs, 781 based on Foata normal form. 3/2475 useless extension candidates. Maximal degree in co-relation 5955. Up to 2235 conditions per place. [2024-06-27 17:57:45,638 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 45 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-27 17:57:45,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 336 flow [2024-06-27 17:57:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:57:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:57:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-27 17:57:45,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6861702127659575 [2024-06-27 17:57:45,640 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 154 flow. Second operand 4 states and 129 transitions. [2024-06-27 17:57:45,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 336 flow [2024-06-27 17:57:45,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 322 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:45,642 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 218 flow [2024-06-27 17:57:45,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-27 17:57:45,643 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2024-06-27 17:57:45,643 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 218 flow [2024-06-27 17:57:45,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:45,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:45,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:57:45,644 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 17:57:45,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1263047457, now seen corresponding path program 1 times [2024-06-27 17:57:45,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:45,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736938435] [2024-06-27 17:57:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:45,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:45,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736938435] [2024-06-27 17:57:45,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736938435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:45,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:45,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:45,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676425420] [2024-06-27 17:57:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:45,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:45,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-06-27 17:57:45,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:45,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-06-27 17:57:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:46,020 INFO L124 PetriNetUnfolderBase]: 1443/2509 cut-off events. [2024-06-27 17:57:46,021 INFO L125 PetriNetUnfolderBase]: For 2218/2218 co-relation queries the response was YES. [2024-06-27 17:57:46,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 2509 events. 1443/2509 cut-off events. For 2218/2218 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15315 event pairs, 570 based on Foata normal form. 6/2436 useless extension candidates. Maximal degree in co-relation 6471. Up to 2031 conditions per place. [2024-06-27 17:57:46,034 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 63 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-06-27 17:57:46,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 470 flow [2024-06-27 17:57:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-27 17:57:46,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-06-27 17:57:46,036 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 218 flow. Second operand 6 states and 192 transitions. [2024-06-27 17:57:46,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 470 flow [2024-06-27 17:57:46,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 93 transitions, 464 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:46,039 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 273 flow [2024-06-27 17:57:46,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 17:57:46,040 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-27 17:57:46,040 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 273 flow [2024-06-27 17:57:46,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:46,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:46,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:57:46,041 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 17:57:46,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1352047647, now seen corresponding path program 1 times [2024-06-27 17:57:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:46,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219528463] [2024-06-27 17:57:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:46,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:46,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219528463] [2024-06-27 17:57:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219528463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:46,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:46,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:46,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852843076] [2024-06-27 17:57:46,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:46,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:46,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:46,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:46,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:46,316 INFO L124 PetriNetUnfolderBase]: 1604/2648 cut-off events. [2024-06-27 17:57:46,317 INFO L125 PetriNetUnfolderBase]: For 3852/3852 co-relation queries the response was YES. [2024-06-27 17:57:46,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7689 conditions, 2648 events. 1604/2648 cut-off events. For 3852/3852 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15678 event pairs, 510 based on Foata normal form. 4/2638 useless extension candidates. Maximal degree in co-relation 7669. Up to 2145 conditions per place. [2024-06-27 17:57:46,331 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 65 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-06-27 17:57:46,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 102 transitions, 619 flow [2024-06-27 17:57:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-27 17:57:46,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7106382978723405 [2024-06-27 17:57:46,333 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 273 flow. Second operand 5 states and 167 transitions. [2024-06-27 17:57:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 102 transitions, 619 flow [2024-06-27 17:57:46,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 588 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:46,338 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 399 flow [2024-06-27 17:57:46,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-06-27 17:57:46,338 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-27 17:57:46,338 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 399 flow [2024-06-27 17:57:46,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:46,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:57:46,339 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 17:57:46,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1460103909, now seen corresponding path program 2 times [2024-06-27 17:57:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:46,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559103264] [2024-06-27 17:57:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:46,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:46,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559103264] [2024-06-27 17:57:46,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559103264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:46,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:46,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:46,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202043662] [2024-06-27 17:57:46,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:46,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:46,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:46,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:46,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:46,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:46,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:46,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:46,617 INFO L124 PetriNetUnfolderBase]: 1653/2778 cut-off events. [2024-06-27 17:57:46,618 INFO L125 PetriNetUnfolderBase]: For 6514/6514 co-relation queries the response was YES. [2024-06-27 17:57:46,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 2778 events. 1653/2778 cut-off events. For 6514/6514 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16704 event pairs, 569 based on Foata normal form. 4/2771 useless extension candidates. Maximal degree in co-relation 9228. Up to 2191 conditions per place. [2024-06-27 17:57:46,634 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 61 selfloop transitions, 30 changer transitions 0/106 dead transitions. [2024-06-27 17:57:46,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 735 flow [2024-06-27 17:57:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 17:57:46,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6936170212765957 [2024-06-27 17:57:46,636 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 399 flow. Second operand 5 states and 163 transitions. [2024-06-27 17:57:46,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 735 flow [2024-06-27 17:57:46,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 705 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:46,645 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 562 flow [2024-06-27 17:57:46,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=562, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-27 17:57:46,646 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-27 17:57:46,646 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 562 flow [2024-06-27 17:57:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:46,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:46,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:57:46,647 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 17:57:46,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2118475645, now seen corresponding path program 1 times [2024-06-27 17:57:46,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:46,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566983532] [2024-06-27 17:57:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:46,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566983532] [2024-06-27 17:57:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566983532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:46,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:46,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:46,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752981183] [2024-06-27 17:57:46,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:46,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:46,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:46,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:46,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 562 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:46,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:46,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:47,001 INFO L124 PetriNetUnfolderBase]: 1661/2810 cut-off events. [2024-06-27 17:57:47,002 INFO L125 PetriNetUnfolderBase]: For 8395/8395 co-relation queries the response was YES. [2024-06-27 17:57:47,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 2810 events. 1661/2810 cut-off events. For 8395/8395 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16850 event pairs, 712 based on Foata normal form. 3/2792 useless extension candidates. Maximal degree in co-relation 9939. Up to 2362 conditions per place. [2024-06-27 17:57:47,023 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 80 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-27 17:57:47,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 866 flow [2024-06-27 17:57:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 17:57:47,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6723404255319149 [2024-06-27 17:57:47,025 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 562 flow. Second operand 5 states and 158 transitions. [2024-06-27 17:57:47,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 866 flow [2024-06-27 17:57:47,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 112 transitions, 833 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:47,035 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 626 flow [2024-06-27 17:57:47,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2024-06-27 17:57:47,036 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-06-27 17:57:47,036 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 626 flow [2024-06-27 17:57:47,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:47,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:47,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:57:47,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:47,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:47,038 INFO L85 PathProgramCache]: Analyzing trace with hash 834651153, now seen corresponding path program 1 times [2024-06-27 17:57:47,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:47,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613146309] [2024-06-27 17:57:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:47,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:47,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613146309] [2024-06-27 17:57:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613146309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:47,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:47,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:57:47,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834307696] [2024-06-27 17:57:47,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:47,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:57:47,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:57:47,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:57:47,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:47,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:47,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:47,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:47,375 INFO L124 PetriNetUnfolderBase]: 1649/2701 cut-off events. [2024-06-27 17:57:47,375 INFO L125 PetriNetUnfolderBase]: For 9757/9757 co-relation queries the response was YES. [2024-06-27 17:57:47,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10138 conditions, 2701 events. 1649/2701 cut-off events. For 9757/9757 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15893 event pairs, 503 based on Foata normal form. 2/2696 useless extension candidates. Maximal degree in co-relation 10108. Up to 2382 conditions per place. [2024-06-27 17:57:47,392 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 76 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2024-06-27 17:57:47,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 102 transitions, 828 flow [2024-06-27 17:57:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:57:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:57:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 17:57:47,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-06-27 17:57:47,394 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 626 flow. Second operand 4 states and 123 transitions. [2024-06-27 17:57:47,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 102 transitions, 828 flow [2024-06-27 17:57:47,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 798 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:47,403 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 626 flow [2024-06-27 17:57:47,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=626, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-27 17:57:47,406 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-27 17:57:47,406 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 626 flow [2024-06-27 17:57:47,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:47,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:57:47,407 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 17:57:47,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2084017284, now seen corresponding path program 1 times [2024-06-27 17:57:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119114531] [2024-06-27 17:57:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119114531] [2024-06-27 17:57:47,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119114531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:47,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:47,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:47,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944367963] [2024-06-27 17:57:47,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:47,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:47,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:47,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:47,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 626 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:47,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:47,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:47,774 INFO L124 PetriNetUnfolderBase]: 1707/2784 cut-off events. [2024-06-27 17:57:47,774 INFO L125 PetriNetUnfolderBase]: For 10728/10728 co-relation queries the response was YES. [2024-06-27 17:57:47,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10607 conditions, 2784 events. 1707/2784 cut-off events. For 10728/10728 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16258 event pairs, 470 based on Foata normal form. 3/2784 useless extension candidates. Maximal degree in co-relation 10574. Up to 2421 conditions per place. [2024-06-27 17:57:47,789 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 102 selfloop transitions, 18 changer transitions 0/135 dead transitions. [2024-06-27 17:57:47,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 135 transitions, 1034 flow [2024-06-27 17:57:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:57:47,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504559270516718 [2024-06-27 17:57:47,790 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 626 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:57:47,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 135 transitions, 1034 flow [2024-06-27 17:57:47,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 135 transitions, 1006 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:47,805 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 724 flow [2024-06-27 17:57:47,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-27 17:57:47,806 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 35 predicate places. [2024-06-27 17:57:47,806 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 724 flow [2024-06-27 17:57:47,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:47,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:57:47,807 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 17:57:47,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2057284994, now seen corresponding path program 2 times [2024-06-27 17:57:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:47,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268699498] [2024-06-27 17:57:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:47,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:47,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268699498] [2024-06-27 17:57:47,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268699498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:47,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:47,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282282625] [2024-06-27 17:57:47,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:47,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:47,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:47,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 724 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:47,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:47,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:48,184 INFO L124 PetriNetUnfolderBase]: 1806/3011 cut-off events. [2024-06-27 17:57:48,185 INFO L125 PetriNetUnfolderBase]: For 14571/14571 co-relation queries the response was YES. [2024-06-27 17:57:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12060 conditions, 3011 events. 1806/3011 cut-off events. For 14571/14571 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18388 event pairs, 503 based on Foata normal form. 4/2999 useless extension candidates. Maximal degree in co-relation 12026. Up to 2176 conditions per place. [2024-06-27 17:57:48,204 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 84 selfloop transitions, 52 changer transitions 0/151 dead transitions. [2024-06-27 17:57:48,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 151 transitions, 1312 flow [2024-06-27 17:57:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-06-27 17:57:48,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7127659574468085 [2024-06-27 17:57:48,205 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 724 flow. Second operand 6 states and 201 transitions. [2024-06-27 17:57:48,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 151 transitions, 1312 flow [2024-06-27 17:57:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 1260 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:48,221 INFO L231 Difference]: Finished difference. Result has 90 places, 115 transitions, 959 flow [2024-06-27 17:57:48,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=959, PETRI_PLACES=90, PETRI_TRANSITIONS=115} [2024-06-27 17:57:48,222 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 39 predicate places. [2024-06-27 17:57:48,222 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 115 transitions, 959 flow [2024-06-27 17:57:48,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:48,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:48,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:57:48,223 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 17:57:48,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2079248740, now seen corresponding path program 1 times [2024-06-27 17:57:48,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:48,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68510990] [2024-06-27 17:57:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:48,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:48,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:48,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68510990] [2024-06-27 17:57:48,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68510990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:48,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:48,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243877486] [2024-06-27 17:57:48,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:48,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:48,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:48,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:48,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:48,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 115 transitions, 959 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:48,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:48,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:48,575 INFO L124 PetriNetUnfolderBase]: 1863/3108 cut-off events. [2024-06-27 17:57:48,575 INFO L125 PetriNetUnfolderBase]: For 18900/18900 co-relation queries the response was YES. [2024-06-27 17:57:48,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13644 conditions, 3108 events. 1863/3108 cut-off events. For 18900/18900 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19090 event pairs, 482 based on Foata normal form. 4/3093 useless extension candidates. Maximal degree in co-relation 13607. Up to 2310 conditions per place. [2024-06-27 17:57:48,596 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 106 selfloop transitions, 41 changer transitions 0/162 dead transitions. [2024-06-27 17:57:48,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 162 transitions, 1505 flow [2024-06-27 17:57:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-27 17:57:48,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7056737588652482 [2024-06-27 17:57:48,597 INFO L175 Difference]: Start difference. First operand has 90 places, 115 transitions, 959 flow. Second operand 6 states and 199 transitions. [2024-06-27 17:57:48,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 162 transitions, 1505 flow [2024-06-27 17:57:48,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 162 transitions, 1445 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:48,655 INFO L231 Difference]: Finished difference. Result has 97 places, 128 transitions, 1122 flow [2024-06-27 17:57:48,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1122, PETRI_PLACES=97, PETRI_TRANSITIONS=128} [2024-06-27 17:57:48,656 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2024-06-27 17:57:48,656 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 128 transitions, 1122 flow [2024-06-27 17:57:48,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:48,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:48,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:57:48,657 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 17:57:48,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1167421954, now seen corresponding path program 3 times [2024-06-27 17:57:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:48,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599282543] [2024-06-27 17:57:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:48,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:48,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:48,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599282543] [2024-06-27 17:57:48,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599282543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:48,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:48,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347445278] [2024-06-27 17:57:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:48,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:48,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 128 transitions, 1122 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:48,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:48,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:49,050 INFO L124 PetriNetUnfolderBase]: 1896/3158 cut-off events. [2024-06-27 17:57:49,050 INFO L125 PetriNetUnfolderBase]: For 21455/21455 co-relation queries the response was YES. [2024-06-27 17:57:49,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14556 conditions, 3158 events. 1896/3158 cut-off events. For 21455/21455 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19493 event pairs, 510 based on Foata normal form. 4/3145 useless extension candidates. Maximal degree in co-relation 14515. Up to 2289 conditions per place. [2024-06-27 17:57:49,071 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 95 selfloop transitions, 56 changer transitions 0/166 dead transitions. [2024-06-27 17:57:49,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 166 transitions, 1630 flow [2024-06-27 17:57:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 17:57:49,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914893617021277 [2024-06-27 17:57:49,073 INFO L175 Difference]: Start difference. First operand has 97 places, 128 transitions, 1122 flow. Second operand 6 states and 195 transitions. [2024-06-27 17:57:49,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 166 transitions, 1630 flow [2024-06-27 17:57:49,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 166 transitions, 1581 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:49,100 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1325 flow [2024-06-27 17:57:49,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-27 17:57:49,101 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 52 predicate places. [2024-06-27 17:57:49,101 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1325 flow [2024-06-27 17:57:49,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:49,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:49,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:57:49,102 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 17:57:49,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash -60129526, now seen corresponding path program 2 times [2024-06-27 17:57:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:49,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141327674] [2024-06-27 17:57:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:49,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141327674] [2024-06-27 17:57:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141327674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:49,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466641995] [2024-06-27 17:57:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:49,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:49,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1325 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:49,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:49,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:49,535 INFO L124 PetriNetUnfolderBase]: 1993/3351 cut-off events. [2024-06-27 17:57:49,535 INFO L125 PetriNetUnfolderBase]: For 26000/26000 co-relation queries the response was YES. [2024-06-27 17:57:49,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16039 conditions, 3351 events. 1993/3351 cut-off events. For 26000/26000 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21001 event pairs, 511 based on Foata normal form. 4/3341 useless extension candidates. Maximal degree in co-relation 15994. Up to 2442 conditions per place. [2024-06-27 17:57:49,556 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 115 selfloop transitions, 52 changer transitions 0/182 dead transitions. [2024-06-27 17:57:49,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 182 transitions, 1963 flow [2024-06-27 17:57:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-27 17:57:49,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7021276595744681 [2024-06-27 17:57:49,558 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1325 flow. Second operand 6 states and 198 transitions. [2024-06-27 17:57:49,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 182 transitions, 1963 flow [2024-06-27 17:57:49,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 182 transitions, 1884 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:49,591 INFO L231 Difference]: Finished difference. Result has 108 places, 151 transitions, 1531 flow [2024-06-27 17:57:49,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=108, PETRI_TRANSITIONS=151} [2024-06-27 17:57:49,592 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-27 17:57:49,592 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 151 transitions, 1531 flow [2024-06-27 17:57:49,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:49,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:57:49,593 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 17:57:49,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -51558646, now seen corresponding path program 3 times [2024-06-27 17:57:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367780256] [2024-06-27 17:57:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:49,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:49,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367780256] [2024-06-27 17:57:49,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367780256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:49,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:49,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:49,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776489054] [2024-06-27 17:57:49,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:49,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:49,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:49,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:49,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:49,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:49,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 1531 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:49,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:49,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:50,012 INFO L124 PetriNetUnfolderBase]: 1984/3362 cut-off events. [2024-06-27 17:57:50,012 INFO L125 PetriNetUnfolderBase]: For 28913/28913 co-relation queries the response was YES. [2024-06-27 17:57:50,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16300 conditions, 3362 events. 1984/3362 cut-off events. For 28913/28913 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21132 event pairs, 503 based on Foata normal form. 4/3352 useless extension candidates. Maximal degree in co-relation 16252. Up to 2436 conditions per place. [2024-06-27 17:57:50,036 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 115 selfloop transitions, 51 changer transitions 0/181 dead transitions. [2024-06-27 17:57:50,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 2011 flow [2024-06-27 17:57:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-27 17:57:50,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6950354609929078 [2024-06-27 17:57:50,037 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 1531 flow. Second operand 6 states and 196 transitions. [2024-06-27 17:57:50,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 2011 flow [2024-06-27 17:57:50,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 181 transitions, 1959 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:50,077 INFO L231 Difference]: Finished difference. Result has 114 places, 151 transitions, 1592 flow [2024-06-27 17:57:50,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1592, PETRI_PLACES=114, PETRI_TRANSITIONS=151} [2024-06-27 17:57:50,077 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 63 predicate places. [2024-06-27 17:57:50,078 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 151 transitions, 1592 flow [2024-06-27 17:57:50,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:50,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:50,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:50,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:57:50,078 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 17:57:50,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash 40622396, now seen corresponding path program 1 times [2024-06-27 17:57:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:50,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101324976] [2024-06-27 17:57:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:50,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101324976] [2024-06-27 17:57:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101324976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:50,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:50,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:50,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600613890] [2024-06-27 17:57:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:50,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:50,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:50,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:50,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 151 transitions, 1592 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:50,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:50,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:50,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:50,523 INFO L124 PetriNetUnfolderBase]: 1994/3321 cut-off events. [2024-06-27 17:57:50,523 INFO L125 PetriNetUnfolderBase]: For 31572/31572 co-relation queries the response was YES. [2024-06-27 17:57:50,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16795 conditions, 3321 events. 1994/3321 cut-off events. For 31572/31572 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20572 event pairs, 449 based on Foata normal form. 6/3325 useless extension candidates. Maximal degree in co-relation 16744. Up to 2785 conditions per place. [2024-06-27 17:57:50,545 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 148 selfloop transitions, 20 changer transitions 0/183 dead transitions. [2024-06-27 17:57:50,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2072 flow [2024-06-27 17:57:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:57:50,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631205673758865 [2024-06-27 17:57:50,547 INFO L175 Difference]: Start difference. First operand has 114 places, 151 transitions, 1592 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:57:50,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2072 flow [2024-06-27 17:57:50,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1961 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:50,585 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1583 flow [2024-06-27 17:57:50,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1583, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-27 17:57:50,586 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-06-27 17:57:50,586 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1583 flow [2024-06-27 17:57:50,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:50,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:50,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:50,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:57:50,587 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 17:57:50,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 104383259, now seen corresponding path program 1 times [2024-06-27 17:57:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:50,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342572638] [2024-06-27 17:57:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:50,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342572638] [2024-06-27 17:57:50,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342572638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:50,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:50,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:50,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943425312] [2024-06-27 17:57:50,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:50,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:50,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:50,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:50,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:50,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:50,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1583 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:50,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:50,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:50,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:50,983 INFO L124 PetriNetUnfolderBase]: 1986/3338 cut-off events. [2024-06-27 17:57:50,983 INFO L125 PetriNetUnfolderBase]: For 33005/33005 co-relation queries the response was YES. [2024-06-27 17:57:50,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16738 conditions, 3338 events. 1986/3338 cut-off events. For 33005/33005 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20947 event pairs, 479 based on Foata normal form. 4/3326 useless extension candidates. Maximal degree in co-relation 16686. Up to 2667 conditions per place. [2024-06-27 17:57:51,012 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 126 selfloop transitions, 30 changer transitions 0/171 dead transitions. [2024-06-27 17:57:51,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 171 transitions, 1993 flow [2024-06-27 17:57:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-27 17:57:51,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638297872340425 [2024-06-27 17:57:51,014 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1583 flow. Second operand 5 states and 156 transitions. [2024-06-27 17:57:51,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 171 transitions, 1993 flow [2024-06-27 17:57:51,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 1915 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:51,051 INFO L231 Difference]: Finished difference. Result has 117 places, 154 transitions, 1574 flow [2024-06-27 17:57:51,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1574, PETRI_PLACES=117, PETRI_TRANSITIONS=154} [2024-06-27 17:57:51,051 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-27 17:57:51,052 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 154 transitions, 1574 flow [2024-06-27 17:57:51,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:51,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:51,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:57:51,052 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:51,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1866210224, now seen corresponding path program 1 times [2024-06-27 17:57:51,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:51,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864235030] [2024-06-27 17:57:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:51,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:51,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864235030] [2024-06-27 17:57:51,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864235030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:51,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:51,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:51,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229803252] [2024-06-27 17:57:51,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:51,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:51,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:51,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:51,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 154 transitions, 1574 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:51,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:51,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:51,472 INFO L124 PetriNetUnfolderBase]: 2008/3338 cut-off events. [2024-06-27 17:57:51,472 INFO L125 PetriNetUnfolderBase]: For 33513/33513 co-relation queries the response was YES. [2024-06-27 17:57:51,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17045 conditions, 3338 events. 2008/3338 cut-off events. For 33513/33513 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20638 event pairs, 470 based on Foata normal form. 2/3327 useless extension candidates. Maximal degree in co-relation 16992. Up to 2679 conditions per place. [2024-06-27 17:57:51,497 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 132 selfloop transitions, 34 changer transitions 0/181 dead transitions. [2024-06-27 17:57:51,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 2098 flow [2024-06-27 17:57:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-27 17:57:51,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851063829787234 [2024-06-27 17:57:51,499 INFO L175 Difference]: Start difference. First operand has 117 places, 154 transitions, 1574 flow. Second operand 5 states and 161 transitions. [2024-06-27 17:57:51,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 2098 flow [2024-06-27 17:57:51,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 181 transitions, 1984 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:51,548 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 1613 flow [2024-06-27 17:57:51,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-27 17:57:51,548 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-06-27 17:57:51,548 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 1613 flow [2024-06-27 17:57:51,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:51,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:51,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:57:51,549 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:51,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1772289340, now seen corresponding path program 2 times [2024-06-27 17:57:51,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:51,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516052093] [2024-06-27 17:57:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:51,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:51,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:51,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516052093] [2024-06-27 17:57:51,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516052093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:51,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:51,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071398831] [2024-06-27 17:57:51,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:51,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:51,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:51,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 1613 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:51,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:51,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:51,934 INFO L124 PetriNetUnfolderBase]: 1980/3290 cut-off events. [2024-06-27 17:57:51,934 INFO L125 PetriNetUnfolderBase]: For 34971/34971 co-relation queries the response was YES. [2024-06-27 17:57:51,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16601 conditions, 3290 events. 1980/3290 cut-off events. For 34971/34971 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20431 event pairs, 486 based on Foata normal form. 4/3274 useless extension candidates. Maximal degree in co-relation 16551. Up to 2649 conditions per place. [2024-06-27 17:57:51,958 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 126 selfloop transitions, 33 changer transitions 0/174 dead transitions. [2024-06-27 17:57:51,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 2001 flow [2024-06-27 17:57:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-27 17:57:51,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 17:57:51,960 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 1613 flow. Second operand 5 states and 155 transitions. [2024-06-27 17:57:51,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 2001 flow [2024-06-27 17:57:52,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 174 transitions, 1942 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:52,004 INFO L231 Difference]: Finished difference. Result has 119 places, 158 transitions, 1629 flow [2024-06-27 17:57:52,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1629, PETRI_PLACES=119, PETRI_TRANSITIONS=158} [2024-06-27 17:57:52,005 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2024-06-27 17:57:52,005 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 158 transitions, 1629 flow [2024-06-27 17:57:52,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:52,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:52,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:52,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:57:52,006 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 17:57:52,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1731057653, now seen corresponding path program 1 times [2024-06-27 17:57:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796838916] [2024-06-27 17:57:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:52,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:52,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796838916] [2024-06-27 17:57:52,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796838916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:52,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:52,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441553818] [2024-06-27 17:57:52,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:52,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:52,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:52,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 1629 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:52,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:52,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:52,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:52,510 INFO L124 PetriNetUnfolderBase]: 2109/3601 cut-off events. [2024-06-27 17:57:52,511 INFO L125 PetriNetUnfolderBase]: For 39969/39969 co-relation queries the response was YES. [2024-06-27 17:57:52,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17950 conditions, 3601 events. 2109/3601 cut-off events. For 39969/39969 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22799 event pairs, 530 based on Foata normal form. 6/3572 useless extension candidates. Maximal degree in co-relation 17899. Up to 2796 conditions per place. [2024-06-27 17:57:52,534 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 177 selfloop transitions, 23 changer transitions 0/215 dead transitions. [2024-06-27 17:57:52,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 215 transitions, 2359 flow [2024-06-27 17:57:52,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 250 transitions. [2024-06-27 17:57:52,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648936170212766 [2024-06-27 17:57:52,536 INFO L175 Difference]: Start difference. First operand has 119 places, 158 transitions, 1629 flow. Second operand 8 states and 250 transitions. [2024-06-27 17:57:52,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 215 transitions, 2359 flow [2024-06-27 17:57:52,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 215 transitions, 2237 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:52,587 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1662 flow [2024-06-27 17:57:52,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1662, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-27 17:57:52,587 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 71 predicate places. [2024-06-27 17:57:52,587 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1662 flow [2024-06-27 17:57:52,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:52,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:52,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:52,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:57:52,588 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:52,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1646834467, now seen corresponding path program 2 times [2024-06-27 17:57:52,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:52,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552364146] [2024-06-27 17:57:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:52,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:52,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:52,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552364146] [2024-06-27 17:57:52,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552364146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:52,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:52,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:52,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629280238] [2024-06-27 17:57:52,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:52,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:52,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:52,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:52,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1662 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:52,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:52,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:52,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:53,092 INFO L124 PetriNetUnfolderBase]: 2122/3578 cut-off events. [2024-06-27 17:57:53,093 INFO L125 PetriNetUnfolderBase]: For 42160/42160 co-relation queries the response was YES. [2024-06-27 17:57:53,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18386 conditions, 3578 events. 2122/3578 cut-off events. For 42160/42160 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22550 event pairs, 717 based on Foata normal form. 6/3549 useless extension candidates. Maximal degree in co-relation 18333. Up to 2964 conditions per place. [2024-06-27 17:57:53,118 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 175 selfloop transitions, 21 changer transitions 0/211 dead transitions. [2024-06-27 17:57:53,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 2254 flow [2024-06-27 17:57:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 17:57:53,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462765957446809 [2024-06-27 17:57:53,120 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1662 flow. Second operand 8 states and 243 transitions. [2024-06-27 17:57:53,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 2254 flow [2024-06-27 17:57:53,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2154 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:53,180 INFO L231 Difference]: Finished difference. Result has 126 places, 167 transitions, 1676 flow [2024-06-27 17:57:53,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1676, PETRI_PLACES=126, PETRI_TRANSITIONS=167} [2024-06-27 17:57:53,181 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 75 predicate places. [2024-06-27 17:57:53,181 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 167 transitions, 1676 flow [2024-06-27 17:57:53,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:53,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:53,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:53,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:57:53,182 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 17:57:53,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1646829507, now seen corresponding path program 1 times [2024-06-27 17:57:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:53,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040517071] [2024-06-27 17:57:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:53,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:53,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:53,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040517071] [2024-06-27 17:57:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040517071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:53,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:53,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:53,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057024153] [2024-06-27 17:57:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:53,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:53,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:53,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:53,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 167 transitions, 1676 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:53,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:53,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:53,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:53,632 INFO L124 PetriNetUnfolderBase]: 2166/3550 cut-off events. [2024-06-27 17:57:53,632 INFO L125 PetriNetUnfolderBase]: For 43096/43096 co-relation queries the response was YES. [2024-06-27 17:57:53,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18541 conditions, 3550 events. 2166/3550 cut-off events. For 43096/43096 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21902 event pairs, 380 based on Foata normal form. 3/3550 useless extension candidates. Maximal degree in co-relation 18486. Up to 3033 conditions per place. [2024-06-27 17:57:53,654 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 178 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2024-06-27 17:57:53,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 217 transitions, 2310 flow [2024-06-27 17:57:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-27 17:57:53,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-27 17:57:53,655 INFO L175 Difference]: Start difference. First operand has 126 places, 167 transitions, 1676 flow. Second operand 8 states and 244 transitions. [2024-06-27 17:57:53,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 217 transitions, 2310 flow [2024-06-27 17:57:53,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 217 transitions, 2242 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:53,712 INFO L231 Difference]: Finished difference. Result has 128 places, 174 transitions, 1761 flow [2024-06-27 17:57:53,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1761, PETRI_PLACES=128, PETRI_TRANSITIONS=174} [2024-06-27 17:57:53,713 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2024-06-27 17:57:53,713 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 174 transitions, 1761 flow [2024-06-27 17:57:53,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:53,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:53,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:57:53,714 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 17:57:53,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1365904163, now seen corresponding path program 3 times [2024-06-27 17:57:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:53,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705551302] [2024-06-27 17:57:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:53,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:53,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705551302] [2024-06-27 17:57:53,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705551302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:53,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:53,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401800577] [2024-06-27 17:57:53,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:53,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:53,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:53,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 174 transitions, 1761 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:53,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:53,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:53,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:54,196 INFO L124 PetriNetUnfolderBase]: 2275/3742 cut-off events. [2024-06-27 17:57:54,196 INFO L125 PetriNetUnfolderBase]: For 51590/51590 co-relation queries the response was YES. [2024-06-27 17:57:54,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19780 conditions, 3742 events. 2275/3742 cut-off events. For 51590/51590 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23361 event pairs, 419 based on Foata normal form. 14/3739 useless extension candidates. Maximal degree in co-relation 19724. Up to 2726 conditions per place. [2024-06-27 17:57:54,221 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 140 selfloop transitions, 65 changer transitions 0/220 dead transitions. [2024-06-27 17:57:54,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 220 transitions, 2471 flow [2024-06-27 17:57:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-06-27 17:57:54,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7051671732522796 [2024-06-27 17:57:54,222 INFO L175 Difference]: Start difference. First operand has 128 places, 174 transitions, 1761 flow. Second operand 7 states and 232 transitions. [2024-06-27 17:57:54,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 220 transitions, 2471 flow [2024-06-27 17:57:54,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 2389 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:54,296 INFO L231 Difference]: Finished difference. Result has 131 places, 177 transitions, 1886 flow [2024-06-27 17:57:54,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1886, PETRI_PLACES=131, PETRI_TRANSITIONS=177} [2024-06-27 17:57:54,297 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-27 17:57:54,297 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 177 transitions, 1886 flow [2024-06-27 17:57:54,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:54,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:54,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:57:54,298 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 17:57:54,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1365899203, now seen corresponding path program 2 times [2024-06-27 17:57:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:54,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970582469] [2024-06-27 17:57:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:54,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:54,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970582469] [2024-06-27 17:57:54,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970582469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:54,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:54,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968272898] [2024-06-27 17:57:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:54,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:54,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 177 transitions, 1886 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:54,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:54,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:54,806 INFO L124 PetriNetUnfolderBase]: 2406/4025 cut-off events. [2024-06-27 17:57:54,807 INFO L125 PetriNetUnfolderBase]: For 58590/58590 co-relation queries the response was YES. [2024-06-27 17:57:54,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21853 conditions, 4025 events. 2406/4025 cut-off events. For 58590/58590 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25849 event pairs, 464 based on Foata normal form. 4/4004 useless extension candidates. Maximal degree in co-relation 21795. Up to 2540 conditions per place. [2024-06-27 17:57:54,830 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 127 selfloop transitions, 99 changer transitions 0/241 dead transitions. [2024-06-27 17:57:54,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 241 transitions, 2992 flow [2024-06-27 17:57:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-06-27 17:57:54,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7203647416413373 [2024-06-27 17:57:54,832 INFO L175 Difference]: Start difference. First operand has 131 places, 177 transitions, 1886 flow. Second operand 7 states and 237 transitions. [2024-06-27 17:57:54,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 241 transitions, 2992 flow [2024-06-27 17:57:54,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 241 transitions, 2825 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:54,908 INFO L231 Difference]: Finished difference. Result has 134 places, 198 transitions, 2223 flow [2024-06-27 17:57:54,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2223, PETRI_PLACES=134, PETRI_TRANSITIONS=198} [2024-06-27 17:57:54,909 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2024-06-27 17:57:54,909 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 198 transitions, 2223 flow [2024-06-27 17:57:54,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:54,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:54,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:57:54,910 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:54,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1359232963, now seen corresponding path program 3 times [2024-06-27 17:57:54,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:54,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832615826] [2024-06-27 17:57:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:54,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832615826] [2024-06-27 17:57:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832615826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:54,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:54,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:54,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214668558] [2024-06-27 17:57:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:54,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:54,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:55,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:55,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 198 transitions, 2223 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:55,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:55,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:55,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:55,388 INFO L124 PetriNetUnfolderBase]: 2395/3966 cut-off events. [2024-06-27 17:57:55,388 INFO L125 PetriNetUnfolderBase]: For 62444/62444 co-relation queries the response was YES. [2024-06-27 17:57:55,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22359 conditions, 3966 events. 2395/3966 cut-off events. For 62444/62444 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25272 event pairs, 440 based on Foata normal form. 4/3946 useless extension candidates. Maximal degree in co-relation 22299. Up to 2531 conditions per place. [2024-06-27 17:57:55,415 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 124 selfloop transitions, 101 changer transitions 0/240 dead transitions. [2024-06-27 17:57:55,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 240 transitions, 3031 flow [2024-06-27 17:57:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 235 transitions. [2024-06-27 17:57:55,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-06-27 17:57:55,417 INFO L175 Difference]: Start difference. First operand has 134 places, 198 transitions, 2223 flow. Second operand 7 states and 235 transitions. [2024-06-27 17:57:55,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 240 transitions, 3031 flow [2024-06-27 17:57:55,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 240 transitions, 2887 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:55,523 INFO L231 Difference]: Finished difference. Result has 141 places, 198 transitions, 2291 flow [2024-06-27 17:57:55,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2291, PETRI_PLACES=141, PETRI_TRANSITIONS=198} [2024-06-27 17:57:55,524 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-27 17:57:55,524 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 198 transitions, 2291 flow [2024-06-27 17:57:55,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:55,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:55,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:57:55,525 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 17:57:55,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -998220645, now seen corresponding path program 1 times [2024-06-27 17:57:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072880199] [2024-06-27 17:57:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:55,606 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 17:57:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072880199] [2024-06-27 17:57:55,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072880199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:55,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:55,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119434514] [2024-06-27 17:57:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:55,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:55,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:55,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:55,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 198 transitions, 2291 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:55,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:55,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:55,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:56,116 INFO L124 PetriNetUnfolderBase]: 2504/4117 cut-off events. [2024-06-27 17:57:56,117 INFO L125 PetriNetUnfolderBase]: For 71859/71859 co-relation queries the response was YES. [2024-06-27 17:57:56,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23648 conditions, 4117 events. 2504/4117 cut-off events. For 71859/71859 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26141 event pairs, 444 based on Foata normal form. 14/4112 useless extension candidates. Maximal degree in co-relation 23585. Up to 3082 conditions per place. [2024-06-27 17:57:56,149 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 169 selfloop transitions, 59 changer transitions 0/243 dead transitions. [2024-06-27 17:57:56,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 243 transitions, 3025 flow [2024-06-27 17:57:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:56,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-27 17:57:56,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990881458966566 [2024-06-27 17:57:56,156 INFO L175 Difference]: Start difference. First operand has 141 places, 198 transitions, 2291 flow. Second operand 7 states and 230 transitions. [2024-06-27 17:57:56,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 243 transitions, 3025 flow [2024-06-27 17:57:56,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 243 transitions, 2819 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:56,244 INFO L231 Difference]: Finished difference. Result has 143 places, 201 transitions, 2286 flow [2024-06-27 17:57:56,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2286, PETRI_PLACES=143, PETRI_TRANSITIONS=201} [2024-06-27 17:57:56,245 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-27 17:57:56,245 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 201 transitions, 2286 flow [2024-06-27 17:57:56,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:56,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:56,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:56,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:57:56,246 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 17:57:56,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash 225841853, now seen corresponding path program 4 times [2024-06-27 17:57:56,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:56,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043667901] [2024-06-27 17:57:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:56,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:56,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043667901] [2024-06-27 17:57:56,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043667901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:56,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:56,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:56,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871336339] [2024-06-27 17:57:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:56,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:56,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:56,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:56,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 201 transitions, 2286 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:56,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:56,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:56,881 INFO L124 PetriNetUnfolderBase]: 2588/4388 cut-off events. [2024-06-27 17:57:56,882 INFO L125 PetriNetUnfolderBase]: For 77111/77111 co-relation queries the response was YES. [2024-06-27 17:57:56,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24443 conditions, 4388 events. 2588/4388 cut-off events. For 77111/77111 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28699 event pairs, 552 based on Foata normal form. 14/4376 useless extension candidates. Maximal degree in co-relation 24379. Up to 3170 conditions per place. [2024-06-27 17:57:56,920 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 167 selfloop transitions, 61 changer transitions 0/243 dead transitions. [2024-06-27 17:57:56,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 243 transitions, 3026 flow [2024-06-27 17:57:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-27 17:57:56,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6899696048632219 [2024-06-27 17:57:56,922 INFO L175 Difference]: Start difference. First operand has 143 places, 201 transitions, 2286 flow. Second operand 7 states and 227 transitions. [2024-06-27 17:57:56,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 243 transitions, 3026 flow [2024-06-27 17:57:57,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 243 transitions, 2867 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:57,018 INFO L231 Difference]: Finished difference. Result has 145 places, 204 transitions, 2342 flow [2024-06-27 17:57:57,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2342, PETRI_PLACES=145, PETRI_TRANSITIONS=204} [2024-06-27 17:57:57,019 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 94 predicate places. [2024-06-27 17:57:57,019 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 204 transitions, 2342 flow [2024-06-27 17:57:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:57,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:57,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:57:57,020 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 17:57:57,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1949882711, now seen corresponding path program 4 times [2024-06-27 17:57:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792359781] [2024-06-27 17:57:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:57,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792359781] [2024-06-27 17:57:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792359781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:57,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:57,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:57,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927311131] [2024-06-27 17:57:57,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:57,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:57,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:57,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:57,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 204 transitions, 2342 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:57,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:57,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:57,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:57,590 INFO L124 PetriNetUnfolderBase]: 2721/4503 cut-off events. [2024-06-27 17:57:57,590 INFO L125 PetriNetUnfolderBase]: For 81349/81349 co-relation queries the response was YES. [2024-06-27 17:57:57,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25922 conditions, 4503 events. 2721/4503 cut-off events. For 81349/81349 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29359 event pairs, 502 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 25857. Up to 2942 conditions per place. [2024-06-27 17:57:57,624 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 140 selfloop transitions, 106 changer transitions 0/261 dead transitions. [2024-06-27 17:57:57,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 261 transitions, 3520 flow [2024-06-27 17:57:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 234 transitions. [2024-06-27 17:57:57,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7112462006079028 [2024-06-27 17:57:57,626 INFO L175 Difference]: Start difference. First operand has 145 places, 204 transitions, 2342 flow. Second operand 7 states and 234 transitions. [2024-06-27 17:57:57,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 261 transitions, 3520 flow [2024-06-27 17:57:57,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 3347 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:57,744 INFO L231 Difference]: Finished difference. Result has 147 places, 222 transitions, 2695 flow [2024-06-27 17:57:57,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2695, PETRI_PLACES=147, PETRI_TRANSITIONS=222} [2024-06-27 17:57:57,744 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-27 17:57:57,745 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 222 transitions, 2695 flow [2024-06-27 17:57:57,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:57,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:57,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:57,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:57:57,745 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 17:57:57,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1549131229, now seen corresponding path program 5 times [2024-06-27 17:57:57,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:57,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557704898] [2024-06-27 17:57:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:57,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:57,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557704898] [2024-06-27 17:57:57,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557704898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:57,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:57,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028660263] [2024-06-27 17:57:57,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:57,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:57,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:57,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:57,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:57,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 222 transitions, 2695 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:57,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:57,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:57,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:58,326 INFO L124 PetriNetUnfolderBase]: 2712/4491 cut-off events. [2024-06-27 17:57:58,326 INFO L125 PetriNetUnfolderBase]: For 82643/82643 co-relation queries the response was YES. [2024-06-27 17:57:58,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25930 conditions, 4491 events. 2712/4491 cut-off events. For 82643/82643 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29253 event pairs, 502 based on Foata normal form. 4/4470 useless extension candidates. Maximal degree in co-relation 25864. Up to 2936 conditions per place. [2024-06-27 17:57:58,360 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 137 selfloop transitions, 107 changer transitions 0/259 dead transitions. [2024-06-27 17:57:58,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 259 transitions, 3477 flow [2024-06-27 17:57:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 231 transitions. [2024-06-27 17:57:58,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7021276595744681 [2024-06-27 17:57:58,361 INFO L175 Difference]: Start difference. First operand has 147 places, 222 transitions, 2695 flow. Second operand 7 states and 231 transitions. [2024-06-27 17:57:58,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 259 transitions, 3477 flow [2024-06-27 17:57:58,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 259 transitions, 3315 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:58,498 INFO L231 Difference]: Finished difference. Result has 153 places, 222 transitions, 2757 flow [2024-06-27 17:57:58,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2757, PETRI_PLACES=153, PETRI_TRANSITIONS=222} [2024-06-27 17:57:58,500 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 102 predicate places. [2024-06-27 17:57:58,500 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 222 transitions, 2757 flow [2024-06-27 17:57:58,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:58,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:58,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:58,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:57:58,501 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:58,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1785486079, now seen corresponding path program 6 times [2024-06-27 17:57:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:58,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457413408] [2024-06-27 17:57:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:58,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:58,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457413408] [2024-06-27 17:57:58,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457413408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:58,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:58,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:58,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271747228] [2024-06-27 17:57:58,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:58,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:58,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:58,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 222 transitions, 2757 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:58,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:58,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:58,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:59,058 INFO L124 PetriNetUnfolderBase]: 2703/4499 cut-off events. [2024-06-27 17:57:59,058 INFO L125 PetriNetUnfolderBase]: For 84856/84856 co-relation queries the response was YES. [2024-06-27 17:57:59,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26199 conditions, 4499 events. 2703/4499 cut-off events. For 84856/84856 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29361 event pairs, 493 based on Foata normal form. 4/4476 useless extension candidates. Maximal degree in co-relation 26131. Up to 2930 conditions per place. [2024-06-27 17:57:59,095 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 137 selfloop transitions, 106 changer transitions 0/258 dead transitions. [2024-06-27 17:57:59,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 258 transitions, 3495 flow [2024-06-27 17:57:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-06-27 17:57:59,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6960486322188449 [2024-06-27 17:57:59,097 INFO L175 Difference]: Start difference. First operand has 153 places, 222 transitions, 2757 flow. Second operand 7 states and 229 transitions. [2024-06-27 17:57:59,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 258 transitions, 3495 flow [2024-06-27 17:57:59,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 258 transitions, 3198 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:59,247 INFO L231 Difference]: Finished difference. Result has 154 places, 222 transitions, 2682 flow [2024-06-27 17:57:59,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2682, PETRI_PLACES=154, PETRI_TRANSITIONS=222} [2024-06-27 17:57:59,248 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-06-27 17:57:59,249 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 222 transitions, 2682 flow [2024-06-27 17:57:59,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:59,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:59,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:59,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:57:59,249 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:59,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash 87856445, now seen corresponding path program 2 times [2024-06-27 17:57:59,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908176133] [2024-06-27 17:57:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908176133] [2024-06-27 17:57:59,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908176133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:59,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136469400] [2024-06-27 17:57:59,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:59,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:57:59,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 222 transitions, 2682 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:59,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:59,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:57:59,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:59,940 INFO L124 PetriNetUnfolderBase]: 2822/4642 cut-off events. [2024-06-27 17:57:59,941 INFO L125 PetriNetUnfolderBase]: For 92762/92762 co-relation queries the response was YES. [2024-06-27 17:57:59,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26802 conditions, 4642 events. 2822/4642 cut-off events. For 92762/92762 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30090 event pairs, 474 based on Foata normal form. 14/4637 useless extension candidates. Maximal degree in co-relation 26734. Up to 3538 conditions per place. [2024-06-27 17:57:59,971 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 192 selfloop transitions, 57 changer transitions 0/264 dead transitions. [2024-06-27 17:57:59,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 264 transitions, 3478 flow [2024-06-27 17:57:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-27 17:57:59,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6930091185410334 [2024-06-27 17:57:59,973 INFO L175 Difference]: Start difference. First operand has 154 places, 222 transitions, 2682 flow. Second operand 7 states and 228 transitions. [2024-06-27 17:57:59,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 264 transitions, 3478 flow [2024-06-27 17:58:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 264 transitions, 3266 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:00,100 INFO L231 Difference]: Finished difference. Result has 155 places, 225 transitions, 2675 flow [2024-06-27 17:58:00,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2675, PETRI_PLACES=155, PETRI_TRANSITIONS=225} [2024-06-27 17:58:00,101 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 104 predicate places. [2024-06-27 17:58:00,101 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 225 transitions, 2675 flow [2024-06-27 17:58:00,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:00,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:00,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:00,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:58:00,102 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 17:58:00,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash 372956315, now seen corresponding path program 3 times [2024-06-27 17:58:00,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:00,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475964423] [2024-06-27 17:58:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:00,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:00,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:00,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475964423] [2024-06-27 17:58:00,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475964423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:00,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:00,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:00,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672859510] [2024-06-27 17:58:00,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:00,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:00,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:00,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:00,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:00,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 225 transitions, 2675 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:00,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:00,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:00,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:00,700 INFO L124 PetriNetUnfolderBase]: 2941/4837 cut-off events. [2024-06-27 17:58:00,701 INFO L125 PetriNetUnfolderBase]: For 99823/99823 co-relation queries the response was YES. [2024-06-27 17:58:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27852 conditions, 4837 events. 2941/4837 cut-off events. For 99823/99823 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31677 event pairs, 491 based on Foata normal form. 14/4832 useless extension candidates. Maximal degree in co-relation 27783. Up to 3719 conditions per place. [2024-06-27 17:58:00,738 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 197 selfloop transitions, 56 changer transitions 0/268 dead transitions. [2024-06-27 17:58:00,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 268 transitions, 3551 flow [2024-06-27 17:58:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-27 17:58:00,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6930091185410334 [2024-06-27 17:58:00,740 INFO L175 Difference]: Start difference. First operand has 155 places, 225 transitions, 2675 flow. Second operand 7 states and 228 transitions. [2024-06-27 17:58:00,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 268 transitions, 3551 flow [2024-06-27 17:58:00,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 268 transitions, 3388 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:00,866 INFO L231 Difference]: Finished difference. Result has 157 places, 228 transitions, 2721 flow [2024-06-27 17:58:00,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2721, PETRI_PLACES=157, PETRI_TRANSITIONS=228} [2024-06-27 17:58:00,866 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 106 predicate places. [2024-06-27 17:58:00,866 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 228 transitions, 2721 flow [2024-06-27 17:58:00,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:00,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:00,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:00,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:58:00,867 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 17:58:00,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1785793537, now seen corresponding path program 4 times [2024-06-27 17:58:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:00,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770604960] [2024-06-27 17:58:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:00,930 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 17:58:00,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:00,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770604960] [2024-06-27 17:58:00,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770604960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:00,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:00,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724387733] [2024-06-27 17:58:00,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:00,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:00,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 228 transitions, 2721 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:00,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:00,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:00,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:01,518 INFO L124 PetriNetUnfolderBase]: 3189/5273 cut-off events. [2024-06-27 17:58:01,518 INFO L125 PetriNetUnfolderBase]: For 112485/112485 co-relation queries the response was YES. [2024-06-27 17:58:01,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30161 conditions, 5273 events. 3189/5273 cut-off events. For 112485/112485 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35428 event pairs, 480 based on Foata normal form. 14/5268 useless extension candidates. Maximal degree in co-relation 30091. Up to 3426 conditions per place. [2024-06-27 17:58:01,561 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 200 selfloop transitions, 63 changer transitions 0/278 dead transitions. [2024-06-27 17:58:01,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 278 transitions, 3741 flow [2024-06-27 17:58:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-06-27 17:58:01,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7051671732522796 [2024-06-27 17:58:01,563 INFO L175 Difference]: Start difference. First operand has 157 places, 228 transitions, 2721 flow. Second operand 7 states and 232 transitions. [2024-06-27 17:58:01,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 278 transitions, 3741 flow [2024-06-27 17:58:01,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 278 transitions, 3574 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:01,758 INFO L231 Difference]: Finished difference. Result has 160 places, 233 transitions, 2829 flow [2024-06-27 17:58:01,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2829, PETRI_PLACES=160, PETRI_TRANSITIONS=233} [2024-06-27 17:58:01,759 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 17:58:01,759 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 233 transitions, 2829 flow [2024-06-27 17:58:01,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:01,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:01,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:01,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:58:01,760 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 17:58:01,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1528096538, now seen corresponding path program 1 times [2024-06-27 17:58:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:01,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748918927] [2024-06-27 17:58:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:01,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:01,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748918927] [2024-06-27 17:58:01,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748918927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:01,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:01,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350005583] [2024-06-27 17:58:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:01,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:01,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 233 transitions, 2829 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:01,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:01,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:01,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:02,376 INFO L124 PetriNetUnfolderBase]: 3211/5305 cut-off events. [2024-06-27 17:58:02,376 INFO L125 PetriNetUnfolderBase]: For 113130/113130 co-relation queries the response was YES. [2024-06-27 17:58:02,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31173 conditions, 5305 events. 3211/5305 cut-off events. For 113130/113130 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35612 event pairs, 584 based on Foata normal form. 2/5287 useless extension candidates. Maximal degree in co-relation 31101. Up to 4452 conditions per place. [2024-06-27 17:58:02,421 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 204 selfloop transitions, 34 changer transitions 0/253 dead transitions. [2024-06-27 17:58:02,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 253 transitions, 3477 flow [2024-06-27 17:58:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:58:02,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6510638297872341 [2024-06-27 17:58:02,422 INFO L175 Difference]: Start difference. First operand has 160 places, 233 transitions, 2829 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:58:02,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 253 transitions, 3477 flow [2024-06-27 17:58:02,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 253 transitions, 3336 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:02,620 INFO L231 Difference]: Finished difference. Result has 162 places, 237 transitions, 2835 flow [2024-06-27 17:58:02,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2835, PETRI_PLACES=162, PETRI_TRANSITIONS=237} [2024-06-27 17:58:02,623 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 111 predicate places. [2024-06-27 17:58:02,623 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 237 transitions, 2835 flow [2024-06-27 17:58:02,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:02,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:02,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:02,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:58:02,624 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 17:58:02,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1318945034, now seen corresponding path program 2 times [2024-06-27 17:58:02,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:02,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195821051] [2024-06-27 17:58:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:02,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:02,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195821051] [2024-06-27 17:58:02,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195821051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:02,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:02,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:02,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866507043] [2024-06-27 17:58:02,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:02,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:02,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 237 transitions, 2835 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:02,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:02,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:02,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:03,233 INFO L124 PetriNetUnfolderBase]: 3175/5236 cut-off events. [2024-06-27 17:58:03,233 INFO L125 PetriNetUnfolderBase]: For 110042/110042 co-relation queries the response was YES. [2024-06-27 17:58:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30564 conditions, 5236 events. 3175/5236 cut-off events. For 110042/110042 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35004 event pairs, 559 based on Foata normal form. 2/5223 useless extension candidates. Maximal degree in co-relation 30490. Up to 4396 conditions per place. [2024-06-27 17:58:03,277 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 203 selfloop transitions, 37 changer transitions 0/255 dead transitions. [2024-06-27 17:58:03,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 3357 flow [2024-06-27 17:58:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-27 17:58:03,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638297872340425 [2024-06-27 17:58:03,279 INFO L175 Difference]: Start difference. First operand has 162 places, 237 transitions, 2835 flow. Second operand 5 states and 156 transitions. [2024-06-27 17:58:03,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 3357 flow [2024-06-27 17:58:03,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 255 transitions, 3275 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:03,467 INFO L231 Difference]: Finished difference. Result has 164 places, 237 transitions, 2836 flow [2024-06-27 17:58:03,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2836, PETRI_PLACES=164, PETRI_TRANSITIONS=237} [2024-06-27 17:58:03,469 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 17:58:03,469 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 237 transitions, 2836 flow [2024-06-27 17:58:03,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:03,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:03,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:03,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:58:03,469 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 17:58:03,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1528106458, now seen corresponding path program 1 times [2024-06-27 17:58:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:03,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186950283] [2024-06-27 17:58:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:03,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:03,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:03,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186950283] [2024-06-27 17:58:03,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186950283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:03,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:03,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802834157] [2024-06-27 17:58:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:03,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:03,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 237 transitions, 2836 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:03,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:03,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:03,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:04,119 INFO L124 PetriNetUnfolderBase]: 3224/5328 cut-off events. [2024-06-27 17:58:04,120 INFO L125 PetriNetUnfolderBase]: For 118906/118906 co-relation queries the response was YES. [2024-06-27 17:58:04,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31076 conditions, 5328 events. 3224/5328 cut-off events. For 118906/118906 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35777 event pairs, 568 based on Foata normal form. 8/5317 useless extension candidates. Maximal degree in co-relation 31002. Up to 4411 conditions per place. [2024-06-27 17:58:04,164 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 204 selfloop transitions, 41 changer transitions 0/260 dead transitions. [2024-06-27 17:58:04,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 260 transitions, 3424 flow [2024-06-27 17:58:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:58:04,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418439716312057 [2024-06-27 17:58:04,165 INFO L175 Difference]: Start difference. First operand has 164 places, 237 transitions, 2836 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:58:04,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 260 transitions, 3424 flow [2024-06-27 17:58:04,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 260 transitions, 3320 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:04,315 INFO L231 Difference]: Finished difference. Result has 165 places, 241 transitions, 2885 flow [2024-06-27 17:58:04,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2732, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2885, PETRI_PLACES=165, PETRI_TRANSITIONS=241} [2024-06-27 17:58:04,316 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2024-06-27 17:58:04,316 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 241 transitions, 2885 flow [2024-06-27 17:58:04,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:04,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:04,317 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 17:58:04,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:58:04,317 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 17:58:04,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1879704817, now seen corresponding path program 1 times [2024-06-27 17:58:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:04,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701844705] [2024-06-27 17:58:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:04,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:04,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701844705] [2024-06-27 17:58:04,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701844705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:04,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:04,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:04,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001980853] [2024-06-27 17:58:04,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:04,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:04,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 241 transitions, 2885 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:04,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:04,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:04,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:04,967 INFO L124 PetriNetUnfolderBase]: 3211/5297 cut-off events. [2024-06-27 17:58:04,967 INFO L125 PetriNetUnfolderBase]: For 117376/117376 co-relation queries the response was YES. [2024-06-27 17:58:04,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31327 conditions, 5297 events. 3211/5297 cut-off events. For 117376/117376 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35368 event pairs, 791 based on Foata normal form. 2/5288 useless extension candidates. Maximal degree in co-relation 31252. Up to 4605 conditions per place. [2024-06-27 17:58:05,011 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 244 selfloop transitions, 18 changer transitions 0/277 dead transitions. [2024-06-27 17:58:05,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 277 transitions, 3495 flow [2024-06-27 17:58:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:58:05,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6443768996960486 [2024-06-27 17:58:05,013 INFO L175 Difference]: Start difference. First operand has 165 places, 241 transitions, 2885 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:58:05,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 277 transitions, 3495 flow [2024-06-27 17:58:05,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 277 transitions, 3362 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:05,207 INFO L231 Difference]: Finished difference. Result has 168 places, 241 transitions, 2796 flow [2024-06-27 17:58:05,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2796, PETRI_PLACES=168, PETRI_TRANSITIONS=241} [2024-06-27 17:58:05,207 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-27 17:58:05,208 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 241 transitions, 2796 flow [2024-06-27 17:58:05,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:05,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:05,208 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 17:58:05,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:58:05,208 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 17:58:05,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1332382995, now seen corresponding path program 2 times [2024-06-27 17:58:05,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:05,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954470168] [2024-06-27 17:58:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:05,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:05,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954470168] [2024-06-27 17:58:05,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954470168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:05,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:05,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:05,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865681129] [2024-06-27 17:58:05,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:05,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:05,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:05,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:05,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:05,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 241 transitions, 2796 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:05,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:05,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:05,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:05,906 INFO L124 PetriNetUnfolderBase]: 3247/5357 cut-off events. [2024-06-27 17:58:05,906 INFO L125 PetriNetUnfolderBase]: For 121688/121688 co-relation queries the response was YES. [2024-06-27 17:58:05,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31270 conditions, 5357 events. 3247/5357 cut-off events. For 121688/121688 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35884 event pairs, 551 based on Foata normal form. 2/5342 useless extension candidates. Maximal degree in co-relation 31194. Up to 4229 conditions per place. [2024-06-27 17:58:05,955 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 188 selfloop transitions, 72 changer transitions 0/275 dead transitions. [2024-06-27 17:58:05,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 275 transitions, 3696 flow [2024-06-27 17:58:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 17:58:05,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773049645390071 [2024-06-27 17:58:05,956 INFO L175 Difference]: Start difference. First operand has 168 places, 241 transitions, 2796 flow. Second operand 6 states and 191 transitions. [2024-06-27 17:58:05,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 275 transitions, 3696 flow [2024-06-27 17:58:06,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 275 transitions, 3660 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:06,175 INFO L231 Difference]: Finished difference. Result has 168 places, 248 transitions, 3015 flow [2024-06-27 17:58:06,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3015, PETRI_PLACES=168, PETRI_TRANSITIONS=248} [2024-06-27 17:58:06,176 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-27 17:58:06,176 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 248 transitions, 3015 flow [2024-06-27 17:58:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:06,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:06,176 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 17:58:06,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:58:06,177 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 17:58:06,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:06,177 INFO L85 PathProgramCache]: Analyzing trace with hash 111392463, now seen corresponding path program 3 times [2024-06-27 17:58:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:06,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115942553] [2024-06-27 17:58:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:06,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:06,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:06,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115942553] [2024-06-27 17:58:06,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115942553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:06,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:06,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:06,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750469741] [2024-06-27 17:58:06,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:06,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:06,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:06,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:06,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 248 transitions, 3015 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:06,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:06,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:06,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:06,912 INFO L124 PetriNetUnfolderBase]: 3235/5345 cut-off events. [2024-06-27 17:58:06,912 INFO L125 PetriNetUnfolderBase]: For 128410/128410 co-relation queries the response was YES. [2024-06-27 17:58:06,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31579 conditions, 5345 events. 3235/5345 cut-off events. For 128410/128410 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36015 event pairs, 607 based on Foata normal form. 4/5316 useless extension candidates. Maximal degree in co-relation 31502. Up to 4221 conditions per place. [2024-06-27 17:58:06,961 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 188 selfloop transitions, 65 changer transitions 0/268 dead transitions. [2024-06-27 17:58:06,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3713 flow [2024-06-27 17:58:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:58:06,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-06-27 17:58:06,962 INFO L175 Difference]: Start difference. First operand has 168 places, 248 transitions, 3015 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:58:06,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3713 flow [2024-06-27 17:58:07,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 268 transitions, 3611 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:07,205 INFO L231 Difference]: Finished difference. Result has 172 places, 248 transitions, 3051 flow [2024-06-27 17:58:07,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3051, PETRI_PLACES=172, PETRI_TRANSITIONS=248} [2024-06-27 17:58:07,206 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-27 17:58:07,206 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 248 transitions, 3051 flow [2024-06-27 17:58:07,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:07,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:07,207 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 17:58:07,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:58:07,207 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 17:58:07,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash 305735469, now seen corresponding path program 1 times [2024-06-27 17:58:07,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:07,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999518438] [2024-06-27 17:58:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:07,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999518438] [2024-06-27 17:58:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999518438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236249642] [2024-06-27 17:58:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:07,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:07,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:07,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 248 transitions, 3051 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:07,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:07,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:07,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:07,867 INFO L124 PetriNetUnfolderBase]: 3246/5519 cut-off events. [2024-06-27 17:58:07,867 INFO L125 PetriNetUnfolderBase]: For 131201/131201 co-relation queries the response was YES. [2024-06-27 17:58:07,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31996 conditions, 5519 events. 3246/5519 cut-off events. For 131201/131201 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38032 event pairs, 1053 based on Foata normal form. 1/5481 useless extension candidates. Maximal degree in co-relation 31918. Up to 4656 conditions per place. [2024-06-27 17:58:07,913 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 241 selfloop transitions, 20 changer transitions 0/276 dead transitions. [2024-06-27 17:58:07,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 276 transitions, 3743 flow [2024-06-27 17:58:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:58:07,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2024-06-27 17:58:07,914 INFO L175 Difference]: Start difference. First operand has 172 places, 248 transitions, 3051 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:58:07,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 276 transitions, 3743 flow [2024-06-27 17:58:08,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 276 transitions, 3469 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:08,164 INFO L231 Difference]: Finished difference. Result has 170 places, 251 transitions, 2859 flow [2024-06-27 17:58:08,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2859, PETRI_PLACES=170, PETRI_TRANSITIONS=251} [2024-06-27 17:58:08,166 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 119 predicate places. [2024-06-27 17:58:08,166 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 251 transitions, 2859 flow [2024-06-27 17:58:08,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:08,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:08,166 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 17:58:08,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:58:08,167 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 17:58:08,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:08,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1222370785, now seen corresponding path program 2 times [2024-06-27 17:58:08,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:08,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724289780] [2024-06-27 17:58:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:08,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:08,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:08,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724289780] [2024-06-27 17:58:08,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724289780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:08,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:08,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:08,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632767803] [2024-06-27 17:58:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:08,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:08,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 251 transitions, 2859 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:08,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:08,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:08,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:08,767 INFO L124 PetriNetUnfolderBase]: 3243/5325 cut-off events. [2024-06-27 17:58:08,767 INFO L125 PetriNetUnfolderBase]: For 129779/129779 co-relation queries the response was YES. [2024-06-27 17:58:08,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31156 conditions, 5325 events. 3243/5325 cut-off events. For 129779/129779 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35489 event pairs, 524 based on Foata normal form. 1/5312 useless extension candidates. Maximal degree in co-relation 31080. Up to 4653 conditions per place. [2024-06-27 17:58:08,813 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 231 selfloop transitions, 20 changer transitions 0/266 dead transitions. [2024-06-27 17:58:08,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 266 transitions, 3395 flow [2024-06-27 17:58:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:58:08,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 17:58:08,814 INFO L175 Difference]: Start difference. First operand has 170 places, 251 transitions, 2859 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:58:08,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 266 transitions, 3395 flow [2024-06-27 17:58:09,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 266 transitions, 3345 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:09,045 INFO L231 Difference]: Finished difference. Result has 171 places, 251 transitions, 2855 flow [2024-06-27 17:58:09,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2855, PETRI_PLACES=171, PETRI_TRANSITIONS=251} [2024-06-27 17:58:09,046 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 17:58:09,046 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 251 transitions, 2855 flow [2024-06-27 17:58:09,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:09,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:09,046 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 17:58:09,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:58:09,046 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:09,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash -922966610, now seen corresponding path program 1 times [2024-06-27 17:58:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:09,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318845238] [2024-06-27 17:58:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:09,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:09,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318845238] [2024-06-27 17:58:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318845238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:09,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:09,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676604789] [2024-06-27 17:58:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:09,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:09,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:09,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 251 transitions, 2855 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:09,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:09,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:09,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:09,888 INFO L124 PetriNetUnfolderBase]: 3567/5956 cut-off events. [2024-06-27 17:58:09,888 INFO L125 PetriNetUnfolderBase]: For 180443/180443 co-relation queries the response was YES. [2024-06-27 17:58:09,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36139 conditions, 5956 events. 3567/5956 cut-off events. For 180443/180443 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 40852 event pairs, 950 based on Foata normal form. 18/5932 useless extension candidates. Maximal degree in co-relation 36062. Up to 4409 conditions per place. [2024-06-27 17:58:09,943 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 272 selfloop transitions, 30 changer transitions 0/317 dead transitions. [2024-06-27 17:58:09,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 317 transitions, 4003 flow [2024-06-27 17:58:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-06-27 17:58:09,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6713947990543735 [2024-06-27 17:58:09,944 INFO L175 Difference]: Start difference. First operand has 171 places, 251 transitions, 2855 flow. Second operand 9 states and 284 transitions. [2024-06-27 17:58:09,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 317 transitions, 4003 flow [2024-06-27 17:58:10,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 317 transitions, 3947 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:10,268 INFO L231 Difference]: Finished difference. Result has 176 places, 254 transitions, 2982 flow [2024-06-27 17:58:10,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2982, PETRI_PLACES=176, PETRI_TRANSITIONS=254} [2024-06-27 17:58:10,268 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-27 17:58:10,268 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 254 transitions, 2982 flow [2024-06-27 17:58:10,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:10,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:10,269 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 17:58:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:58:10,269 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:10,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1266940122, now seen corresponding path program 2 times [2024-06-27 17:58:10,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:10,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178635420] [2024-06-27 17:58:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:10,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:10,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178635420] [2024-06-27 17:58:10,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178635420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:10,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:10,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:10,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8833651] [2024-06-27 17:58:10,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:10,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:10,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:10,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:10,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 254 transitions, 2982 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:10,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:10,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:10,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:11,200 INFO L124 PetriNetUnfolderBase]: 3762/6287 cut-off events. [2024-06-27 17:58:11,201 INFO L125 PetriNetUnfolderBase]: For 208514/208514 co-relation queries the response was YES. [2024-06-27 17:58:11,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39444 conditions, 6287 events. 3762/6287 cut-off events. For 208514/208514 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 43623 event pairs, 1196 based on Foata normal form. 18/6265 useless extension candidates. Maximal degree in co-relation 39367. Up to 4975 conditions per place. [2024-06-27 17:58:11,246 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 271 selfloop transitions, 30 changer transitions 0/316 dead transitions. [2024-06-27 17:58:11,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 316 transitions, 4132 flow [2024-06-27 17:58:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-27 17:58:11,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619385342789598 [2024-06-27 17:58:11,247 INFO L175 Difference]: Start difference. First operand has 176 places, 254 transitions, 2982 flow. Second operand 9 states and 280 transitions. [2024-06-27 17:58:11,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 316 transitions, 4132 flow [2024-06-27 17:58:11,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 316 transitions, 4023 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:11,572 INFO L231 Difference]: Finished difference. Result has 180 places, 258 transitions, 3112 flow [2024-06-27 17:58:11,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3112, PETRI_PLACES=180, PETRI_TRANSITIONS=258} [2024-06-27 17:58:11,576 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2024-06-27 17:58:11,576 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 258 transitions, 3112 flow [2024-06-27 17:58:11,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:11,581 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 17:58:11,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:58:11,582 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:11,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:11,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1271701722, now seen corresponding path program 3 times [2024-06-27 17:58:11,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:11,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996000431] [2024-06-27 17:58:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:11,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:11,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996000431] [2024-06-27 17:58:11,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996000431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:11,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:11,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:11,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597189962] [2024-06-27 17:58:11,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:11,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:11,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:11,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:11,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 258 transitions, 3112 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:11,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:11,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:12,428 INFO L124 PetriNetUnfolderBase]: 3716/6087 cut-off events. [2024-06-27 17:58:12,428 INFO L125 PetriNetUnfolderBase]: For 196738/196738 co-relation queries the response was YES. [2024-06-27 17:58:12,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37359 conditions, 6087 events. 3716/6087 cut-off events. For 196738/196738 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41448 event pairs, 625 based on Foata normal form. 24/6108 useless extension candidates. Maximal degree in co-relation 37280. Up to 5152 conditions per place. [2024-06-27 17:58:12,482 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 270 selfloop transitions, 26 changer transitions 0/311 dead transitions. [2024-06-27 17:58:12,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 311 transitions, 3928 flow [2024-06-27 17:58:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2024-06-27 17:58:12,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501182033096927 [2024-06-27 17:58:12,484 INFO L175 Difference]: Start difference. First operand has 180 places, 258 transitions, 3112 flow. Second operand 9 states and 275 transitions. [2024-06-27 17:58:12,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 311 transitions, 3928 flow [2024-06-27 17:58:12,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 311 transitions, 3774 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:12,903 INFO L231 Difference]: Finished difference. Result has 184 places, 258 transitions, 3018 flow [2024-06-27 17:58:12,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3018, PETRI_PLACES=184, PETRI_TRANSITIONS=258} [2024-06-27 17:58:12,904 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 133 predicate places. [2024-06-27 17:58:12,904 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 258 transitions, 3018 flow [2024-06-27 17:58:12,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:12,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:12,904 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 17:58:12,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:58:12,905 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 17:58:12,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1291538367, now seen corresponding path program 1 times [2024-06-27 17:58:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:12,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776210416] [2024-06-27 17:58:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:12,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:12,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:12,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776210416] [2024-06-27 17:58:12,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776210416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:12,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:12,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230700896] [2024-06-27 17:58:12,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:12,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:12,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 258 transitions, 3018 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:12,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:12,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:12,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:13,647 INFO L124 PetriNetUnfolderBase]: 3752/6175 cut-off events. [2024-06-27 17:58:13,647 INFO L125 PetriNetUnfolderBase]: For 168717/168717 co-relation queries the response was YES. [2024-06-27 17:58:13,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36417 conditions, 6175 events. 3752/6175 cut-off events. For 168717/168717 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42472 event pairs, 662 based on Foata normal form. 2/6160 useless extension candidates. Maximal degree in co-relation 36336. Up to 5201 conditions per place. [2024-06-27 17:58:13,701 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 217 selfloop transitions, 55 changer transitions 0/287 dead transitions. [2024-06-27 17:58:13,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 287 transitions, 3789 flow [2024-06-27 17:58:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:58:13,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631205673758865 [2024-06-27 17:58:13,702 INFO L175 Difference]: Start difference. First operand has 184 places, 258 transitions, 3018 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:58:13,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 287 transitions, 3789 flow [2024-06-27 17:58:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 287 transitions, 3729 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:14,141 INFO L231 Difference]: Finished difference. Result has 183 places, 265 transitions, 3219 flow [2024-06-27 17:58:14,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3219, PETRI_PLACES=183, PETRI_TRANSITIONS=265} [2024-06-27 17:58:14,141 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 132 predicate places. [2024-06-27 17:58:14,142 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 265 transitions, 3219 flow [2024-06-27 17:58:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:14,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:14,142 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 17:58:14,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:58:14,142 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:14,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash 339480072, now seen corresponding path program 4 times [2024-06-27 17:58:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654788769] [2024-06-27 17:58:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:14,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:14,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654788769] [2024-06-27 17:58:14,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654788769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:14,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:14,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:14,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383864549] [2024-06-27 17:58:14,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:14,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:14,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:14,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:14,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:14,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 265 transitions, 3219 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:14,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:14,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:14,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:15,031 INFO L124 PetriNetUnfolderBase]: 4088/6746 cut-off events. [2024-06-27 17:58:15,031 INFO L125 PetriNetUnfolderBase]: For 240265/240265 co-relation queries the response was YES. [2024-06-27 17:58:15,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39933 conditions, 6746 events. 4088/6746 cut-off events. For 240265/240265 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47150 event pairs, 772 based on Foata normal form. 50/6766 useless extension candidates. Maximal degree in co-relation 39850. Up to 4489 conditions per place. [2024-06-27 17:58:15,091 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 174 selfloop transitions, 129 changer transitions 0/318 dead transitions. [2024-06-27 17:58:15,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 318 transitions, 4317 flow [2024-06-27 17:58:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-27 17:58:15,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-27 17:58:15,092 INFO L175 Difference]: Start difference. First operand has 183 places, 265 transitions, 3219 flow. Second operand 8 states and 267 transitions. [2024-06-27 17:58:15,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 318 transitions, 4317 flow [2024-06-27 17:58:15,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 318 transitions, 4219 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:15,443 INFO L231 Difference]: Finished difference. Result has 187 places, 267 transitions, 3484 flow [2024-06-27 17:58:15,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3484, PETRI_PLACES=187, PETRI_TRANSITIONS=267} [2024-06-27 17:58:15,444 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-06-27 17:58:15,444 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 267 transitions, 3484 flow [2024-06-27 17:58:15,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:15,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:15,444 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 17:58:15,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:58:15,445 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:15,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:15,445 INFO L85 PathProgramCache]: Analyzing trace with hash -879396612, now seen corresponding path program 5 times [2024-06-27 17:58:15,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:15,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521068727] [2024-06-27 17:58:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:15,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:15,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:15,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521068727] [2024-06-27 17:58:15,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521068727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:15,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:15,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416409272] [2024-06-27 17:58:15,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:15,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:15,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:15,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 267 transitions, 3484 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:15,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:15,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:15,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:16,516 INFO L124 PetriNetUnfolderBase]: 4794/7971 cut-off events. [2024-06-27 17:58:16,516 INFO L125 PetriNetUnfolderBase]: For 314067/314067 co-relation queries the response was YES. [2024-06-27 17:58:16,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49074 conditions, 7971 events. 4794/7971 cut-off events. For 314067/314067 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 57589 event pairs, 962 based on Foata normal form. 42/7975 useless extension candidates. Maximal degree in co-relation 48991. Up to 4417 conditions per place. [2024-06-27 17:58:16,712 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 180 selfloop transitions, 135 changer transitions 0/330 dead transitions. [2024-06-27 17:58:16,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 330 transitions, 4892 flow [2024-06-27 17:58:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 273 transitions. [2024-06-27 17:58:16,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.726063829787234 [2024-06-27 17:58:16,714 INFO L175 Difference]: Start difference. First operand has 187 places, 267 transitions, 3484 flow. Second operand 8 states and 273 transitions. [2024-06-27 17:58:16,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 330 transitions, 4892 flow [2024-06-27 17:58:17,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 330 transitions, 4571 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:17,149 INFO L231 Difference]: Finished difference. Result has 189 places, 271 transitions, 3624 flow [2024-06-27 17:58:17,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3624, PETRI_PLACES=189, PETRI_TRANSITIONS=271} [2024-06-27 17:58:17,149 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 138 predicate places. [2024-06-27 17:58:17,149 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 271 transitions, 3624 flow [2024-06-27 17:58:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:17,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:17,150 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 17:58:17,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:58:17,150 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:17,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:17,150 INFO L85 PathProgramCache]: Analyzing trace with hash -552800548, now seen corresponding path program 6 times [2024-06-27 17:58:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222021063] [2024-06-27 17:58:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222021063] [2024-06-27 17:58:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222021063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:17,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:17,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:17,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180608108] [2024-06-27 17:58:17,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:17,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:17,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:17,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 271 transitions, 3624 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:17,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:17,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:17,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:18,154 INFO L124 PetriNetUnfolderBase]: 4697/7742 cut-off events. [2024-06-27 17:58:18,155 INFO L125 PetriNetUnfolderBase]: For 272430/272430 co-relation queries the response was YES. [2024-06-27 17:58:18,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45532 conditions, 7742 events. 4697/7742 cut-off events. For 272430/272430 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 55245 event pairs, 1017 based on Foata normal form. 50/7761 useless extension candidates. Maximal degree in co-relation 45448. Up to 5452 conditions per place. [2024-06-27 17:58:18,232 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 177 selfloop transitions, 131 changer transitions 0/323 dead transitions. [2024-06-27 17:58:18,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 323 transitions, 4744 flow [2024-06-27 17:58:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-27 17:58:18,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-27 17:58:18,234 INFO L175 Difference]: Start difference. First operand has 189 places, 271 transitions, 3624 flow. Second operand 8 states and 267 transitions. [2024-06-27 17:58:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 323 transitions, 4744 flow [2024-06-27 17:58:18,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 323 transitions, 4354 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:18,720 INFO L231 Difference]: Finished difference. Result has 192 places, 271 transitions, 3505 flow [2024-06-27 17:58:18,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=192, PETRI_TRANSITIONS=271} [2024-06-27 17:58:18,721 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 141 predicate places. [2024-06-27 17:58:18,721 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 271 transitions, 3505 flow [2024-06-27 17:58:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:18,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:18,721 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 17:58:18,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:58:18,722 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:18,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash -544222724, now seen corresponding path program 1 times [2024-06-27 17:58:18,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:18,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78839982] [2024-06-27 17:58:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:18,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78839982] [2024-06-27 17:58:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78839982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:18,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940447602] [2024-06-27 17:58:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:18,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:18,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 271 transitions, 3505 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:18,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:18,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:18,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:20,014 INFO L124 PetriNetUnfolderBase]: 5281/8694 cut-off events. [2024-06-27 17:58:20,014 INFO L125 PetriNetUnfolderBase]: For 304362/304362 co-relation queries the response was YES. [2024-06-27 17:58:20,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50101 conditions, 8694 events. 5281/8694 cut-off events. For 304362/304362 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 63553 event pairs, 1068 based on Foata normal form. 42/8701 useless extension candidates. Maximal degree in co-relation 50016. Up to 4647 conditions per place. [2024-06-27 17:58:20,105 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 178 selfloop transitions, 140 changer transitions 0/333 dead transitions. [2024-06-27 17:58:20,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 333 transitions, 4913 flow [2024-06-27 17:58:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 272 transitions. [2024-06-27 17:58:20,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2024-06-27 17:58:20,107 INFO L175 Difference]: Start difference. First operand has 192 places, 271 transitions, 3505 flow. Second operand 8 states and 272 transitions. [2024-06-27 17:58:20,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 333 transitions, 4913 flow [2024-06-27 17:58:20,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 333 transitions, 4633 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:20,694 INFO L231 Difference]: Finished difference. Result has 193 places, 274 transitions, 3646 flow [2024-06-27 17:58:20,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3646, PETRI_PLACES=193, PETRI_TRANSITIONS=274} [2024-06-27 17:58:20,694 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 142 predicate places. [2024-06-27 17:58:20,694 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 274 transitions, 3646 flow [2024-06-27 17:58:20,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:20,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:20,695 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 17:58:20,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:58:20,695 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 17:58:20,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash 286674343, now seen corresponding path program 2 times [2024-06-27 17:58:20,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:20,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103095317] [2024-06-27 17:58:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:20,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:20,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103095317] [2024-06-27 17:58:20,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103095317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:20,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:20,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:20,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331092555] [2024-06-27 17:58:20,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:20,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:20,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:20,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:20,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 274 transitions, 3646 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:20,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:20,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:20,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:21,835 INFO L124 PetriNetUnfolderBase]: 5317/8720 cut-off events. [2024-06-27 17:58:21,836 INFO L125 PetriNetUnfolderBase]: For 275865/275865 co-relation queries the response was YES. [2024-06-27 17:58:21,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50945 conditions, 8720 events. 5317/8720 cut-off events. For 275865/275865 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 63549 event pairs, 1306 based on Foata normal form. 2/8689 useless extension candidates. Maximal degree in co-relation 50859. Up to 7448 conditions per place. [2024-06-27 17:58:21,927 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 208 selfloop transitions, 79 changer transitions 0/302 dead transitions. [2024-06-27 17:58:21,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 302 transitions, 4663 flow [2024-06-27 17:58:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:58:21,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-06-27 17:58:21,929 INFO L175 Difference]: Start difference. First operand has 193 places, 274 transitions, 3646 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:58:21,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 302 transitions, 4663 flow [2024-06-27 17:58:22,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 302 transitions, 4399 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:22,686 INFO L231 Difference]: Finished difference. Result has 195 places, 281 transitions, 3663 flow [2024-06-27 17:58:22,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3663, PETRI_PLACES=195, PETRI_TRANSITIONS=281} [2024-06-27 17:58:22,686 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-06-27 17:58:22,687 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 281 transitions, 3663 flow [2024-06-27 17:58:22,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:22,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:22,687 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 17:58:22,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:58:22,687 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 17:58:22,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1755006603, now seen corresponding path program 3 times [2024-06-27 17:58:22,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:22,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520216501] [2024-06-27 17:58:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:22,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:22,748 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 17:58:22,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520216501] [2024-06-27 17:58:22,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520216501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:22,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:22,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785398981] [2024-06-27 17:58:22,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:22,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:22,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:22,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:22,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 281 transitions, 3663 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:22,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:22,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:22,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:23,810 INFO L124 PetriNetUnfolderBase]: 5311/8791 cut-off events. [2024-06-27 17:58:23,810 INFO L125 PetriNetUnfolderBase]: For 267981/267981 co-relation queries the response was YES. [2024-06-27 17:58:23,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50336 conditions, 8791 events. 5311/8791 cut-off events. For 267981/267981 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 64548 event pairs, 1309 based on Foata normal form. 2/8764 useless extension candidates. Maximal degree in co-relation 50248. Up to 7443 conditions per place. [2024-06-27 17:58:23,886 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 204 selfloop transitions, 83 changer transitions 0/302 dead transitions. [2024-06-27 17:58:23,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 302 transitions, 4571 flow [2024-06-27 17:58:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:58:23,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 17:58:23,887 INFO L175 Difference]: Start difference. First operand has 195 places, 281 transitions, 3663 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:58:23,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 302 transitions, 4571 flow [2024-06-27 17:58:24,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 302 transitions, 4411 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:24,445 INFO L231 Difference]: Finished difference. Result has 199 places, 281 transitions, 3676 flow [2024-06-27 17:58:24,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3676, PETRI_PLACES=199, PETRI_TRANSITIONS=281} [2024-06-27 17:58:24,446 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 148 predicate places. [2024-06-27 17:58:24,446 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 281 transitions, 3676 flow [2024-06-27 17:58:24,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:24,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,446 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 17:58:24,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:58:24,447 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:24,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,448 INFO L85 PathProgramCache]: Analyzing trace with hash 766637278, now seen corresponding path program 7 times [2024-06-27 17:58:24,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747630891] [2024-06-27 17:58:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:24,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747630891] [2024-06-27 17:58:24,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747630891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:24,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410497512] [2024-06-27 17:58:24,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:24,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:24,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:24,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 281 transitions, 3676 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:24,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:24,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:25,705 INFO L124 PetriNetUnfolderBase]: 5647/9266 cut-off events. [2024-06-27 17:58:25,705 INFO L125 PetriNetUnfolderBase]: For 344926/344926 co-relation queries the response was YES. [2024-06-27 17:58:25,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53530 conditions, 9266 events. 5647/9266 cut-off events. For 344926/344926 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 68205 event pairs, 1423 based on Foata normal form. 50/9285 useless extension candidates. Maximal degree in co-relation 53441. Up to 6918 conditions per place. [2024-06-27 17:58:25,793 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 191 selfloop transitions, 124 changer transitions 0/330 dead transitions. [2024-06-27 17:58:25,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 330 transitions, 4730 flow [2024-06-27 17:58:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 263 transitions. [2024-06-27 17:58:25,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.699468085106383 [2024-06-27 17:58:25,816 INFO L175 Difference]: Start difference. First operand has 199 places, 281 transitions, 3676 flow. Second operand 8 states and 263 transitions. [2024-06-27 17:58:25,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 330 transitions, 4730 flow [2024-06-27 17:58:26,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 330 transitions, 4525 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:26,540 INFO L231 Difference]: Finished difference. Result has 202 places, 283 transitions, 3828 flow [2024-06-27 17:58:26,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3828, PETRI_PLACES=202, PETRI_TRANSITIONS=283} [2024-06-27 17:58:26,540 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 151 predicate places. [2024-06-27 17:58:26,540 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 283 transitions, 3828 flow [2024-06-27 17:58:26,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:26,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:58:26,541 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:26,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,541 INFO L85 PathProgramCache]: Analyzing trace with hash 952152648, now seen corresponding path program 8 times [2024-06-27 17:58:26,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862140681] [2024-06-27 17:58:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:26,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862140681] [2024-06-27 17:58:26,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862140681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365756880] [2024-06-27 17:58:26,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:26,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:26,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:26,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 283 transitions, 3828 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:26,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:26,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,901 INFO L124 PetriNetUnfolderBase]: 5983/9846 cut-off events. [2024-06-27 17:58:27,902 INFO L125 PetriNetUnfolderBase]: For 381530/381530 co-relation queries the response was YES. [2024-06-27 17:58:27,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57460 conditions, 9846 events. 5983/9846 cut-off events. For 381530/381530 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 73265 event pairs, 1541 based on Foata normal form. 50/9853 useless extension candidates. Maximal degree in co-relation 57370. Up to 7446 conditions per place. [2024-06-27 17:58:27,991 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 192 selfloop transitions, 125 changer transitions 0/332 dead transitions. [2024-06-27 17:58:27,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 332 transitions, 4894 flow [2024-06-27 17:58:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 262 transitions. [2024-06-27 17:58:27,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6968085106382979 [2024-06-27 17:58:27,992 INFO L175 Difference]: Start difference. First operand has 202 places, 283 transitions, 3828 flow. Second operand 8 states and 262 transitions. [2024-06-27 17:58:27,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 332 transitions, 4894 flow [2024-06-27 17:58:28,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 332 transitions, 4573 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:28,841 INFO L231 Difference]: Finished difference. Result has 204 places, 285 transitions, 3870 flow [2024-06-27 17:58:28,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3870, PETRI_PLACES=204, PETRI_TRANSITIONS=285} [2024-06-27 17:58:28,842 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 153 predicate places. [2024-06-27 17:58:28,842 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 285 transitions, 3870 flow [2024-06-27 17:58:28,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:28,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:28,843 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 17:58:28,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:58:28,843 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:28,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:28,843 INFO L85 PathProgramCache]: Analyzing trace with hash 41179354, now seen corresponding path program 9 times [2024-06-27 17:58:28,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:28,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970070355] [2024-06-27 17:58:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:28,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:28,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:28,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970070355] [2024-06-27 17:58:28,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970070355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:28,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:28,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:28,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615139227] [2024-06-27 17:58:28,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:28,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:28,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:28,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 285 transitions, 3870 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:28,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:28,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:28,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:30,283 INFO L124 PetriNetUnfolderBase]: 6654/10905 cut-off events. [2024-06-27 17:58:30,284 INFO L125 PetriNetUnfolderBase]: For 457378/457378 co-relation queries the response was YES. [2024-06-27 17:58:30,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64976 conditions, 10905 events. 6654/10905 cut-off events. For 457378/457378 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 82360 event pairs, 1651 based on Foata normal form. 42/10916 useless extension candidates. Maximal degree in co-relation 64885. Up to 6820 conditions per place. [2024-06-27 17:58:30,399 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 196 selfloop transitions, 133 changer transitions 0/344 dead transitions. [2024-06-27 17:58:30,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 344 transitions, 5288 flow [2024-06-27 17:58:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 268 transitions. [2024-06-27 17:58:30,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7127659574468085 [2024-06-27 17:58:30,400 INFO L175 Difference]: Start difference. First operand has 204 places, 285 transitions, 3870 flow. Second operand 8 states and 268 transitions. [2024-06-27 17:58:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 344 transitions, 5288 flow [2024-06-27 17:58:31,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 344 transitions, 4961 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:31,359 INFO L231 Difference]: Finished difference. Result has 206 places, 289 transitions, 4028 flow [2024-06-27 17:58:31,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4028, PETRI_PLACES=206, PETRI_TRANSITIONS=289} [2024-06-27 17:58:31,360 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 155 predicate places. [2024-06-27 17:58:31,360 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 289 transitions, 4028 flow [2024-06-27 17:58:31,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:31,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:31,361 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 17:58:31,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:58:31,361 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:31,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1920172250, now seen corresponding path program 10 times [2024-06-27 17:58:31,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:31,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749178774] [2024-06-27 17:58:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:31,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:31,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749178774] [2024-06-27 17:58:31,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749178774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:31,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:31,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:31,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697715293] [2024-06-27 17:58:31,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:31,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:31,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:31,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:31,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:31,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 289 transitions, 4028 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:31,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:31,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:31,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,745 INFO L124 PetriNetUnfolderBase]: 6582/10789 cut-off events. [2024-06-27 17:58:32,745 INFO L125 PetriNetUnfolderBase]: For 402626/402626 co-relation queries the response was YES. [2024-06-27 17:58:32,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61163 conditions, 10789 events. 6582/10789 cut-off events. For 402626/402626 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 81301 event pairs, 1754 based on Foata normal form. 50/10808 useless extension candidates. Maximal degree in co-relation 61071. Up to 8353 conditions per place. [2024-06-27 17:58:32,849 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 197 selfloop transitions, 125 changer transitions 0/337 dead transitions. [2024-06-27 17:58:32,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 337 transitions, 5118 flow [2024-06-27 17:58:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 262 transitions. [2024-06-27 17:58:32,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6968085106382979 [2024-06-27 17:58:32,850 INFO L175 Difference]: Start difference. First operand has 206 places, 289 transitions, 4028 flow. Second operand 8 states and 262 transitions. [2024-06-27 17:58:32,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 337 transitions, 5118 flow [2024-06-27 17:58:34,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 337 transitions, 4792 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:34,103 INFO L231 Difference]: Finished difference. Result has 210 places, 289 transitions, 3961 flow [2024-06-27 17:58:34,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3702, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3961, PETRI_PLACES=210, PETRI_TRANSITIONS=289} [2024-06-27 17:58:34,103 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 159 predicate places. [2024-06-27 17:58:34,103 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 289 transitions, 3961 flow [2024-06-27 17:58:34,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:34,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:34,104 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 17:58:34,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:58:34,104 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:34,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:34,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1222947480, now seen corresponding path program 2 times [2024-06-27 17:58:34,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:34,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775741406] [2024-06-27 17:58:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:34,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:34,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775741406] [2024-06-27 17:58:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775741406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:34,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:34,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785811872] [2024-06-27 17:58:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:34,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:34,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 289 transitions, 3961 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:34,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:34,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:34,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:35,757 INFO L124 PetriNetUnfolderBase]: 6855/11316 cut-off events. [2024-06-27 17:58:35,757 INFO L125 PetriNetUnfolderBase]: For 388094/388094 co-relation queries the response was YES. [2024-06-27 17:58:35,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62592 conditions, 11316 events. 6855/11316 cut-off events. For 388094/388094 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 86782 event pairs, 1773 based on Foata normal form. 42/11315 useless extension candidates. Maximal degree in co-relation 62498. Up to 7791 conditions per place. [2024-06-27 17:58:35,857 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 199 selfloop transitions, 130 changer transitions 0/344 dead transitions. [2024-06-27 17:58:35,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 344 transitions, 5107 flow [2024-06-27 17:58:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-27 17:58:35,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-27 17:58:35,858 INFO L175 Difference]: Start difference. First operand has 210 places, 289 transitions, 3961 flow. Second operand 8 states and 267 transitions. [2024-06-27 17:58:35,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 344 transitions, 5107 flow [2024-06-27 17:58:36,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 344 transitions, 4830 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:36,779 INFO L231 Difference]: Finished difference. Result has 211 places, 291 transitions, 4063 flow [2024-06-27 17:58:36,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4063, PETRI_PLACES=211, PETRI_TRANSITIONS=291} [2024-06-27 17:58:36,780 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-27 17:58:36,780 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 291 transitions, 4063 flow [2024-06-27 17:58:36,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:36,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:36,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:58:36,780 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:36,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash -325263990, now seen corresponding path program 3 times [2024-06-27 17:58:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:36,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529772578] [2024-06-27 17:58:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:36,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529772578] [2024-06-27 17:58:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529772578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:36,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586759423] [2024-06-27 17:58:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:36,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 291 transitions, 4063 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:36,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:36,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:36,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:38,370 INFO L124 PetriNetUnfolderBase]: 7150/11801 cut-off events. [2024-06-27 17:58:38,370 INFO L125 PetriNetUnfolderBase]: For 416595/416595 co-relation queries the response was YES. [2024-06-27 17:58:38,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65524 conditions, 11801 events. 7150/11801 cut-off events. For 416595/416595 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 91310 event pairs, 1883 based on Foata normal form. 42/11812 useless extension candidates. Maximal degree in co-relation 65429. Up to 8650 conditions per place. [2024-06-27 17:58:38,506 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 203 selfloop transitions, 129 changer transitions 0/347 dead transitions. [2024-06-27 17:58:38,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 347 transitions, 5333 flow [2024-06-27 17:58:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-27 17:58:38,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-27 17:58:38,508 INFO L175 Difference]: Start difference. First operand has 211 places, 291 transitions, 4063 flow. Second operand 8 states and 267 transitions. [2024-06-27 17:58:38,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 347 transitions, 5333 flow [2024-06-27 17:58:39,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 347 transitions, 4986 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:39,449 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 4097 flow [2024-06-27 17:58:39,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4097, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-27 17:58:39,449 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-27 17:58:39,450 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 4097 flow [2024-06-27 17:58:39,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:39,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:39,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:39,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:58:39,450 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:39,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:39,451 INFO L85 PathProgramCache]: Analyzing trace with hash 17034600, now seen corresponding path program 4 times [2024-06-27 17:58:39,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:39,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532707440] [2024-06-27 17:58:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:39,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532707440] [2024-06-27 17:58:39,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532707440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:39,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:39,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773016303] [2024-06-27 17:58:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:39,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:39,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:39,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:39,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 4097 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:39,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:39,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:39,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:41,362 INFO L124 PetriNetUnfolderBase]: 7587/12572 cut-off events. [2024-06-27 17:58:41,362 INFO L125 PetriNetUnfolderBase]: For 452210/452210 co-relation queries the response was YES. [2024-06-27 17:58:41,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68427 conditions, 12572 events. 7587/12572 cut-off events. For 452210/452210 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 98954 event pairs, 1951 based on Foata normal form. 42/12583 useless extension candidates. Maximal degree in co-relation 68331. Up to 5945 conditions per place. [2024-06-27 17:58:41,520 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 199 selfloop transitions, 138 changer transitions 0/352 dead transitions. [2024-06-27 17:58:41,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 352 transitions, 5373 flow [2024-06-27 17:58:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 269 transitions. [2024-06-27 17:58:41,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154255319148937 [2024-06-27 17:58:41,521 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 4097 flow. Second operand 8 states and 269 transitions. [2024-06-27 17:58:41,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 352 transitions, 5373 flow [2024-06-27 17:58:42,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 352 transitions, 5024 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:42,740 INFO L231 Difference]: Finished difference. Result has 214 places, 293 transitions, 3997 flow [2024-06-27 17:58:42,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3997, PETRI_PLACES=214, PETRI_TRANSITIONS=293} [2024-06-27 17:58:42,740 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 163 predicate places. [2024-06-27 17:58:42,741 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 293 transitions, 3997 flow [2024-06-27 17:58:42,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:42,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:42,741 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 17:58:42,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:58:42,741 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 17:58:42,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash 253448141, now seen corresponding path program 1 times [2024-06-27 17:58:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:42,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897596438] [2024-06-27 17:58:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:42,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:42,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:42,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897596438] [2024-06-27 17:58:42,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897596438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:42,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:42,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:42,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77428050] [2024-06-27 17:58:42,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:42,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:42,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:42,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:42,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 293 transitions, 3997 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:42,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:42,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:42,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:44,648 INFO L124 PetriNetUnfolderBase]: 7623/12585 cut-off events. [2024-06-27 17:58:44,649 INFO L125 PetriNetUnfolderBase]: For 392771/392771 co-relation queries the response was YES. [2024-06-27 17:58:44,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68236 conditions, 12585 events. 7623/12585 cut-off events. For 392771/392771 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 98811 event pairs, 2230 based on Foata normal form. 4/12567 useless extension candidates. Maximal degree in co-relation 68139. Up to 11384 conditions per place. [2024-06-27 17:58:44,752 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 261 selfloop transitions, 39 changer transitions 0/315 dead transitions. [2024-06-27 17:58:44,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 315 transitions, 4687 flow [2024-06-27 17:58:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:58:44,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-27 17:58:44,754 INFO L175 Difference]: Start difference. First operand has 214 places, 293 transitions, 3997 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:58:44,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 315 transitions, 4687 flow [2024-06-27 17:58:45,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 315 transitions, 4316 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:45,541 INFO L231 Difference]: Finished difference. Result has 214 places, 296 transitions, 3764 flow [2024-06-27 17:58:45,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3764, PETRI_PLACES=214, PETRI_TRANSITIONS=296} [2024-06-27 17:58:45,541 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 163 predicate places. [2024-06-27 17:58:45,541 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 296 transitions, 3764 flow [2024-06-27 17:58:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:45,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:45,542 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 17:58:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:58:45,542 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 17:58:45,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash 673884999, now seen corresponding path program 2 times [2024-06-27 17:58:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:45,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351822013] [2024-06-27 17:58:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:45,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:45,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:45,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351822013] [2024-06-27 17:58:45,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351822013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:45,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:45,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:45,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979677361] [2024-06-27 17:58:45,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:45,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:45,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:45,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:45,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 296 transitions, 3764 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:45,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:45,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:45,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:47,105 INFO L124 PetriNetUnfolderBase]: 7407/12221 cut-off events. [2024-06-27 17:58:47,105 INFO L125 PetriNetUnfolderBase]: For 335979/335979 co-relation queries the response was YES. [2024-06-27 17:58:47,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63765 conditions, 12221 events. 7407/12221 cut-off events. For 335979/335979 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 95330 event pairs, 2087 based on Foata normal form. 4/12201 useless extension candidates. Maximal degree in co-relation 63667. Up to 10952 conditions per place. [2024-06-27 17:58:47,248 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 261 selfloop transitions, 43 changer transitions 0/319 dead transitions. [2024-06-27 17:58:47,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 319 transitions, 4470 flow [2024-06-27 17:58:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:58:47,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-27 17:58:47,250 INFO L175 Difference]: Start difference. First operand has 214 places, 296 transitions, 3764 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:58:47,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 319 transitions, 4470 flow [2024-06-27 17:58:48,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 319 transitions, 4354 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:48,251 INFO L231 Difference]: Finished difference. Result has 216 places, 299 transitions, 3800 flow [2024-06-27 17:58:48,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3800, PETRI_PLACES=216, PETRI_TRANSITIONS=299} [2024-06-27 17:58:48,251 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 165 predicate places. [2024-06-27 17:58:48,251 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 299 transitions, 3800 flow [2024-06-27 17:58:48,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:48,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:48,252 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 17:58:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:58:48,252 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 17:58:48,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash 887866239, now seen corresponding path program 1 times [2024-06-27 17:58:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:48,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059167212] [2024-06-27 17:58:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:48,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059167212] [2024-06-27 17:58:48,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059167212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:48,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:48,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:48,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669178579] [2024-06-27 17:58:48,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:48,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:48,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:48,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:48,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:48,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 299 transitions, 3800 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:48,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:48,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:48,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:49,931 INFO L124 PetriNetUnfolderBase]: 7459/12862 cut-off events. [2024-06-27 17:58:49,932 INFO L125 PetriNetUnfolderBase]: For 348534/348534 co-relation queries the response was YES. [2024-06-27 17:58:50,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65181 conditions, 12862 events. 7459/12862 cut-off events. For 348534/348534 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 104161 event pairs, 2631 based on Foata normal form. 2/12845 useless extension candidates. Maximal degree in co-relation 65082. Up to 10890 conditions per place. [2024-06-27 17:58:50,064 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 259 selfloop transitions, 63 changer transitions 0/337 dead transitions. [2024-06-27 17:58:50,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 337 transitions, 4967 flow [2024-06-27 17:58:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 17:58:50,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 17:58:50,066 INFO L175 Difference]: Start difference. First operand has 216 places, 299 transitions, 3800 flow. Second operand 7 states and 217 transitions. [2024-06-27 17:58:50,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 337 transitions, 4967 flow [2024-06-27 17:58:51,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 337 transitions, 4837 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:51,120 INFO L231 Difference]: Finished difference. Result has 220 places, 307 transitions, 3926 flow [2024-06-27 17:58:51,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3926, PETRI_PLACES=220, PETRI_TRANSITIONS=307} [2024-06-27 17:58:51,122 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 169 predicate places. [2024-06-27 17:58:51,122 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 307 transitions, 3926 flow [2024-06-27 17:58:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:51,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:51,122 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 17:58:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:58:51,122 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 17:58:51,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -761002647, now seen corresponding path program 2 times [2024-06-27 17:58:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:51,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002536831] [2024-06-27 17:58:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:51,194 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 17:58:51,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:51,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002536831] [2024-06-27 17:58:51,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002536831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:51,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:51,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691555310] [2024-06-27 17:58:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:51,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:51,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 307 transitions, 3926 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:51,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:51,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:51,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:52,723 INFO L124 PetriNetUnfolderBase]: 7481/12439 cut-off events. [2024-06-27 17:58:52,724 INFO L125 PetriNetUnfolderBase]: For 357666/357666 co-relation queries the response was YES. [2024-06-27 17:58:52,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65124 conditions, 12439 events. 7481/12439 cut-off events. For 357666/357666 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 98030 event pairs, 2186 based on Foata normal form. 2/12408 useless extension candidates. Maximal degree in co-relation 65023. Up to 10910 conditions per place. [2024-06-27 17:58:52,852 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 247 selfloop transitions, 70 changer transitions 0/332 dead transitions. [2024-06-27 17:58:52,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 332 transitions, 5026 flow [2024-06-27 17:58:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:58:52,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-06-27 17:58:52,853 INFO L175 Difference]: Start difference. First operand has 220 places, 307 transitions, 3926 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:58:52,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 332 transitions, 5026 flow [2024-06-27 17:58:53,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 332 transitions, 4907 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:53,863 INFO L231 Difference]: Finished difference. Result has 223 places, 311 transitions, 4020 flow [2024-06-27 17:58:53,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4020, PETRI_PLACES=223, PETRI_TRANSITIONS=311} [2024-06-27 17:58:53,864 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 172 predicate places. [2024-06-27 17:58:53,864 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 311 transitions, 4020 flow [2024-06-27 17:58:53,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:53,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:53,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:53,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:58:53,865 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 17:58:53,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:53,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1035475839, now seen corresponding path program 3 times [2024-06-27 17:58:53,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:53,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102593892] [2024-06-27 17:58:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:53,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:53,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102593892] [2024-06-27 17:58:53,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102593892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:53,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:53,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142631709] [2024-06-27 17:58:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:53,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:53,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 311 transitions, 4020 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:53,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:53,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:53,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:55,445 INFO L124 PetriNetUnfolderBase]: 7477/12354 cut-off events. [2024-06-27 17:58:55,445 INFO L125 PetriNetUnfolderBase]: For 363311/363311 co-relation queries the response was YES. [2024-06-27 17:58:55,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65021 conditions, 12354 events. 7477/12354 cut-off events. For 363311/363311 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 96689 event pairs, 2137 based on Foata normal form. 2/12318 useless extension candidates. Maximal degree in co-relation 64918. Up to 10908 conditions per place. [2024-06-27 17:58:55,572 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2024-06-27 17:58:55,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 332 transitions, 5060 flow [2024-06-27 17:58:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:58:55,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-06-27 17:58:55,573 INFO L175 Difference]: Start difference. First operand has 223 places, 311 transitions, 4020 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:58:55,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 332 transitions, 5060 flow [2024-06-27 17:58:56,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 332 transitions, 4879 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:56,721 INFO L231 Difference]: Finished difference. Result has 225 places, 311 transitions, 3977 flow [2024-06-27 17:58:56,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3977, PETRI_PLACES=225, PETRI_TRANSITIONS=311} [2024-06-27 17:58:56,722 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 174 predicate places. [2024-06-27 17:58:56,722 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 311 transitions, 3977 flow [2024-06-27 17:58:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:56,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:56,722 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 17:58:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:58:56,723 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 17:58:56,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1565283353, now seen corresponding path program 4 times [2024-06-27 17:58:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907518738] [2024-06-27 17:58:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:56,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:56,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907518738] [2024-06-27 17:58:56,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907518738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:56,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:56,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:56,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497513620] [2024-06-27 17:58:56,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:56,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:56,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 311 transitions, 3977 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:56,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:56,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:56,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:58,303 INFO L124 PetriNetUnfolderBase]: 7499/12394 cut-off events. [2024-06-27 17:58:58,303 INFO L125 PetriNetUnfolderBase]: For 371244/371244 co-relation queries the response was YES. [2024-06-27 17:58:58,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65251 conditions, 12394 events. 7499/12394 cut-off events. For 371244/371244 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 96903 event pairs, 2115 based on Foata normal form. 2/12373 useless extension candidates. Maximal degree in co-relation 65149. Up to 10928 conditions per place. [2024-06-27 17:58:58,646 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 71 changer transitions 0/341 dead transitions. [2024-06-27 17:58:58,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 341 transitions, 4998 flow [2024-06-27 17:58:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:58:58,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-27 17:58:58,647 INFO L175 Difference]: Start difference. First operand has 225 places, 311 transitions, 3977 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:58:58,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 341 transitions, 4998 flow [2024-06-27 17:58:59,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 341 transitions, 4781 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:59,724 INFO L231 Difference]: Finished difference. Result has 224 places, 315 transitions, 3979 flow [2024-06-27 17:58:59,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3979, PETRI_PLACES=224, PETRI_TRANSITIONS=315} [2024-06-27 17:58:59,725 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 173 predicate places. [2024-06-27 17:58:59,725 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 315 transitions, 3979 flow [2024-06-27 17:58:59,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:59,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:59,725 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 17:58:59,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:58:59,726 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 17:58:59,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash -634508293, now seen corresponding path program 5 times [2024-06-27 17:58:59,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:59,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183327717] [2024-06-27 17:58:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:59,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:59,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:59,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183327717] [2024-06-27 17:58:59,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183327717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:59,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:59,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:59,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828434651] [2024-06-27 17:58:59,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:59,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:59,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:59,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:59,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:58:59,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 315 transitions, 3979 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:59,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:59,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:58:59,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:01,311 INFO L124 PetriNetUnfolderBase]: 7521/12432 cut-off events. [2024-06-27 17:59:01,311 INFO L125 PetriNetUnfolderBase]: For 380166/380166 co-relation queries the response was YES. [2024-06-27 17:59:01,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65478 conditions, 12432 events. 7521/12432 cut-off events. For 380166/380166 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 97161 event pairs, 2115 based on Foata normal form. 2/12411 useless extension candidates. Maximal degree in co-relation 65378. Up to 10948 conditions per place. [2024-06-27 17:59:01,445 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 75 changer transitions 0/342 dead transitions. [2024-06-27 17:59:01,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 342 transitions, 5000 flow [2024-06-27 17:59:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:59:01,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 17:59:01,446 INFO L175 Difference]: Start difference. First operand has 224 places, 315 transitions, 3979 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:59:01,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 342 transitions, 5000 flow [2024-06-27 17:59:02,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 342 transitions, 4884 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:02,469 INFO L231 Difference]: Finished difference. Result has 227 places, 319 transitions, 4089 flow [2024-06-27 17:59:02,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4089, PETRI_PLACES=227, PETRI_TRANSITIONS=319} [2024-06-27 17:59:02,470 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 176 predicate places. [2024-06-27 17:59:02,470 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 319 transitions, 4089 flow [2024-06-27 17:59:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:02,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:02,470 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 17:59:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:59:02,470 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 17:59:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash -378007783, now seen corresponding path program 6 times [2024-06-27 17:59:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:02,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959280138] [2024-06-27 17:59:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959280138] [2024-06-27 17:59:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959280138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:02,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:02,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:02,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155932651] [2024-06-27 17:59:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:02,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:02,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:02,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 319 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:02,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:02,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:02,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:04,039 INFO L124 PetriNetUnfolderBase]: 7454/12305 cut-off events. [2024-06-27 17:59:04,039 INFO L125 PetriNetUnfolderBase]: For 387755/387755 co-relation queries the response was YES. [2024-06-27 17:59:04,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64993 conditions, 12305 events. 7454/12305 cut-off events. For 387755/387755 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 95965 event pairs, 2119 based on Foata normal form. 2/12277 useless extension candidates. Maximal degree in co-relation 64892. Up to 10822 conditions per place. [2024-06-27 17:59:04,162 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 247 selfloop transitions, 76 changer transitions 0/338 dead transitions. [2024-06-27 17:59:04,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 338 transitions, 4903 flow [2024-06-27 17:59:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:59:04,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 17:59:04,163 INFO L175 Difference]: Start difference. First operand has 227 places, 319 transitions, 4089 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:59:04,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 338 transitions, 4903 flow [2024-06-27 17:59:05,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 4790 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:05,235 INFO L231 Difference]: Finished difference. Result has 230 places, 319 transitions, 4135 flow [2024-06-27 17:59:05,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4135, PETRI_PLACES=230, PETRI_TRANSITIONS=319} [2024-06-27 17:59:05,236 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 179 predicate places. [2024-06-27 17:59:05,236 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 319 transitions, 4135 flow [2024-06-27 17:59:05,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:05,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:05,236 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 17:59:05,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:59:05,237 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 17:59:05,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash -377999847, now seen corresponding path program 1 times [2024-06-27 17:59:05,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:05,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012483909] [2024-06-27 17:59:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:05,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:05,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012483909] [2024-06-27 17:59:05,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012483909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:05,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:05,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:05,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525887320] [2024-06-27 17:59:05,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:05,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:05,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:05,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 319 transitions, 4135 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:05,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:05,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:05,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:06,862 INFO L124 PetriNetUnfolderBase]: 7490/12347 cut-off events. [2024-06-27 17:59:06,862 INFO L125 PetriNetUnfolderBase]: For 403252/403252 co-relation queries the response was YES. [2024-06-27 17:59:06,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65587 conditions, 12347 events. 7490/12347 cut-off events. For 403252/403252 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 96101 event pairs, 2062 based on Foata normal form. 4/12329 useless extension candidates. Maximal degree in co-relation 65485. Up to 11123 conditions per place. [2024-06-27 17:59:06,993 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 289 selfloop transitions, 37 changer transitions 0/341 dead transitions. [2024-06-27 17:59:06,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 341 transitions, 4885 flow [2024-06-27 17:59:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:59:06,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 17:59:06,994 INFO L175 Difference]: Start difference. First operand has 230 places, 319 transitions, 4135 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:59:06,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 341 transitions, 4885 flow [2024-06-27 17:59:08,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 341 transitions, 4538 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:08,142 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 3930 flow [2024-06-27 17:59:08,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3930, PETRI_PLACES=227, PETRI_TRANSITIONS=322} [2024-06-27 17:59:08,143 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 176 predicate places. [2024-06-27 17:59:08,143 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 3930 flow [2024-06-27 17:59:08,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:08,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:08,143 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 17:59:08,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:59:08,144 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 17:59:08,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash -368476647, now seen corresponding path program 2 times [2024-06-27 17:59:08,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:08,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480306475] [2024-06-27 17:59:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:08,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:08,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480306475] [2024-06-27 17:59:08,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480306475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:08,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:08,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:08,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085849062] [2024-06-27 17:59:08,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:08,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:08,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:08,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:08,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:08,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 322 transitions, 3930 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:08,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:08,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:08,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:09,741 INFO L124 PetriNetUnfolderBase]: 7549/12444 cut-off events. [2024-06-27 17:59:09,742 INFO L125 PetriNetUnfolderBase]: For 415303/415303 co-relation queries the response was YES. [2024-06-27 17:59:09,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66252 conditions, 12444 events. 7549/12444 cut-off events. For 415303/415303 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 97074 event pairs, 2051 based on Foata normal form. 4/12426 useless extension candidates. Maximal degree in co-relation 66150. Up to 11082 conditions per place. [2024-06-27 17:59:09,875 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 288 selfloop transitions, 46 changer transitions 0/349 dead transitions. [2024-06-27 17:59:09,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 349 transitions, 4898 flow [2024-06-27 17:59:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:59:09,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-27 17:59:09,877 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 3930 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:59:09,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 349 transitions, 4898 flow [2024-06-27 17:59:11,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 349 transitions, 4778 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:11,115 INFO L231 Difference]: Finished difference. Result has 229 places, 328 transitions, 4038 flow [2024-06-27 17:59:11,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4038, PETRI_PLACES=229, PETRI_TRANSITIONS=328} [2024-06-27 17:59:11,116 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 178 predicate places. [2024-06-27 17:59:11,116 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 328 transitions, 4038 flow [2024-06-27 17:59:11,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:11,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:11,116 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 17:59:11,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:59:11,117 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 17:59:11,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash -634500357, now seen corresponding path program 3 times [2024-06-27 17:59:11,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:11,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727765138] [2024-06-27 17:59:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:11,176 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 17:59:11,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727765138] [2024-06-27 17:59:11,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727765138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:11,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:11,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:11,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135125083] [2024-06-27 17:59:11,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:11,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:11,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:11,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:11,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:11,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 328 transitions, 4038 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:11,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:11,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:11,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:12,914 INFO L124 PetriNetUnfolderBase]: 7539/12417 cut-off events. [2024-06-27 17:59:12,915 INFO L125 PetriNetUnfolderBase]: For 417060/417060 co-relation queries the response was YES. [2024-06-27 17:59:12,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66089 conditions, 12417 events. 7539/12417 cut-off events. For 417060/417060 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 96554 event pairs, 2044 based on Foata normal form. 4/12404 useless extension candidates. Maximal degree in co-relation 65986. Up to 11194 conditions per place. [2024-06-27 17:59:13,022 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 295 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2024-06-27 17:59:13,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 350 transitions, 4758 flow [2024-06-27 17:59:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:59:13,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418439716312057 [2024-06-27 17:59:13,023 INFO L175 Difference]: Start difference. First operand has 229 places, 328 transitions, 4038 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:59:13,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 350 transitions, 4758 flow [2024-06-27 17:59:13,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 4616 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-27 17:59:13,907 INFO L231 Difference]: Finished difference. Result has 233 places, 328 transitions, 3982 flow [2024-06-27 17:59:13,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3982, PETRI_PLACES=233, PETRI_TRANSITIONS=328} [2024-06-27 17:59:13,908 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-06-27 17:59:13,908 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 328 transitions, 3982 flow [2024-06-27 17:59:13,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:13,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:13,908 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 17:59:13,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:59:13,908 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:13,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:13,909 INFO L85 PathProgramCache]: Analyzing trace with hash -766110383, now seen corresponding path program 1 times [2024-06-27 17:59:13,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:13,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890759665] [2024-06-27 17:59:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:13,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:14,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890759665] [2024-06-27 17:59:14,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890759665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:14,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:14,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:59:14,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900423384] [2024-06-27 17:59:14,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:14,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:59:14,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:14,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:59:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:59:14,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 47 [2024-06-27 17:59:14,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 328 transitions, 3982 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:14,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:14,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 47 [2024-06-27 17:59:14,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:15,709 INFO L124 PetriNetUnfolderBase]: 6369/13578 cut-off events. [2024-06-27 17:59:15,710 INFO L125 PetriNetUnfolderBase]: For 154354/154997 co-relation queries the response was YES. [2024-06-27 17:59:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48330 conditions, 13578 events. 6369/13578 cut-off events. For 154354/154997 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 134638 event pairs, 1177 based on Foata normal form. 656/13491 useless extension candidates. Maximal degree in co-relation 48225. Up to 4983 conditions per place. [2024-06-27 17:59:15,873 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 30 selfloop transitions, 89 changer transitions 0/342 dead transitions. [2024-06-27 17:59:15,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 342 transitions, 4276 flow [2024-06-27 17:59:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:59:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:59:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-06-27 17:59:15,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7712765957446809 [2024-06-27 17:59:15,874 INFO L175 Difference]: Start difference. First operand has 233 places, 328 transitions, 3982 flow. Second operand 4 states and 145 transitions. [2024-06-27 17:59:15,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 342 transitions, 4276 flow [2024-06-27 17:59:16,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 4175 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:16,367 INFO L231 Difference]: Finished difference. Result has 233 places, 329 transitions, 4243 flow [2024-06-27 17:59:16,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4243, PETRI_PLACES=233, PETRI_TRANSITIONS=329} [2024-06-27 17:59:16,367 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-06-27 17:59:16,367 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 329 transitions, 4243 flow [2024-06-27 17:59:16,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:16,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:16,368 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 17:59:16,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:59:16,368 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 17:59:16,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1373449932, now seen corresponding path program 1 times [2024-06-27 17:59:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:16,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663560848] [2024-06-27 17:59:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663560848] [2024-06-27 17:59:16,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663560848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:16,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:16,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:16,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527529231] [2024-06-27 17:59:16,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:16,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:16,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:16,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:16,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 329 transitions, 4243 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:16,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:16,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:18,283 INFO L124 PetriNetUnfolderBase]: 7900/13748 cut-off events. [2024-06-27 17:59:18,284 INFO L125 PetriNetUnfolderBase]: For 445184/445184 co-relation queries the response was YES. [2024-06-27 17:59:18,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72309 conditions, 13748 events. 7900/13748 cut-off events. For 445184/445184 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 113641 event pairs, 3439 based on Foata normal form. 4/13276 useless extension candidates. Maximal degree in co-relation 72202. Up to 12054 conditions per place. [2024-06-27 17:59:18,451 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 325 selfloop transitions, 28 changer transitions 0/369 dead transitions. [2024-06-27 17:59:18,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 369 transitions, 5212 flow [2024-06-27 17:59:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:59:18,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 17:59:18,452 INFO L175 Difference]: Start difference. First operand has 233 places, 329 transitions, 4243 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:59:18,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 369 transitions, 5212 flow [2024-06-27 17:59:19,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 369 transitions, 5122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:59:19,470 INFO L231 Difference]: Finished difference. Result has 239 places, 332 transitions, 4250 flow [2024-06-27 17:59:19,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4250, PETRI_PLACES=239, PETRI_TRANSITIONS=332} [2024-06-27 17:59:19,470 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-06-27 17:59:19,470 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 332 transitions, 4250 flow [2024-06-27 17:59:19,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:19,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:19,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:19,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:59:19,471 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:19,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1382973132, now seen corresponding path program 2 times [2024-06-27 17:59:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440529704] [2024-06-27 17:59:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:19,546 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 17:59:19,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:19,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440529704] [2024-06-27 17:59:19,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440529704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:19,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:19,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702239031] [2024-06-27 17:59:19,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:19,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:19,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:19,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 332 transitions, 4250 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:19,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:19,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:19,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:21,575 INFO L124 PetriNetUnfolderBase]: 7880/13592 cut-off events. [2024-06-27 17:59:21,575 INFO L125 PetriNetUnfolderBase]: For 443047/443047 co-relation queries the response was YES. [2024-06-27 17:59:21,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72121 conditions, 13592 events. 7880/13592 cut-off events. For 443047/443047 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 111569 event pairs, 3668 based on Foata normal form. 4/13120 useless extension candidates. Maximal degree in co-relation 72013. Up to 12228 conditions per place. [2024-06-27 17:59:21,696 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 325 selfloop transitions, 21 changer transitions 0/362 dead transitions. [2024-06-27 17:59:21,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 362 transitions, 5020 flow [2024-06-27 17:59:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:59:21,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037234042553191 [2024-06-27 17:59:21,697 INFO L175 Difference]: Start difference. First operand has 239 places, 332 transitions, 4250 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:59:21,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 362 transitions, 5020 flow [2024-06-27 17:59:23,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 362 transitions, 4965 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:23,022 INFO L231 Difference]: Finished difference. Result has 242 places, 332 transitions, 4243 flow [2024-06-27 17:59:23,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4243, PETRI_PLACES=242, PETRI_TRANSITIONS=332} [2024-06-27 17:59:23,024 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-06-27 17:59:23,024 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 332 transitions, 4243 flow [2024-06-27 17:59:23,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:23,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:23,024 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 17:59:23,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:59:23,024 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 17:59:23,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1657240172, now seen corresponding path program 1 times [2024-06-27 17:59:23,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:23,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722447852] [2024-06-27 17:59:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:23,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722447852] [2024-06-27 17:59:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722447852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:23,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:23,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980263755] [2024-06-27 17:59:23,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:23,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:23,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:23,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 332 transitions, 4243 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:23,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:23,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:23,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:25,186 INFO L124 PetriNetUnfolderBase]: 7886/13615 cut-off events. [2024-06-27 17:59:25,187 INFO L125 PetriNetUnfolderBase]: For 447592/447636 co-relation queries the response was YES. [2024-06-27 17:59:25,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72230 conditions, 13615 events. 7886/13615 cut-off events. For 447592/447636 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 111946 event pairs, 3655 based on Foata normal form. 20/13168 useless extension candidates. Maximal degree in co-relation 72121. Up to 12045 conditions per place. [2024-06-27 17:59:25,357 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 258 selfloop transitions, 87 changer transitions 0/361 dead transitions. [2024-06-27 17:59:25,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 361 transitions, 5456 flow [2024-06-27 17:59:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:59:25,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6474164133738601 [2024-06-27 17:59:25,359 INFO L175 Difference]: Start difference. First operand has 242 places, 332 transitions, 4243 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:59:25,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 361 transitions, 5456 flow [2024-06-27 17:59:26,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 361 transitions, 5384 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 17:59:26,841 INFO L231 Difference]: Finished difference. Result has 241 places, 335 transitions, 4396 flow [2024-06-27 17:59:26,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4171, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4396, PETRI_PLACES=241, PETRI_TRANSITIONS=335} [2024-06-27 17:59:26,842 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 190 predicate places. [2024-06-27 17:59:26,842 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 335 transitions, 4396 flow [2024-06-27 17:59:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:26,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:26,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:26,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:59:26,843 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 17:59:26,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash -519771540, now seen corresponding path program 2 times [2024-06-27 17:59:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:26,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133623426] [2024-06-27 17:59:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:26,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:26,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133623426] [2024-06-27 17:59:26,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133623426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:26,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:26,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:26,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152627994] [2024-06-27 17:59:26,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:26,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:26,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:26,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 335 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:26,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:26,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:26,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:28,738 INFO L124 PetriNetUnfolderBase]: 7892/13623 cut-off events. [2024-06-27 17:59:28,738 INFO L125 PetriNetUnfolderBase]: For 458642/458686 co-relation queries the response was YES. [2024-06-27 17:59:28,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72626 conditions, 13623 events. 7892/13623 cut-off events. For 458642/458686 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 112119 event pairs, 3689 based on Foata normal form. 20/13175 useless extension candidates. Maximal degree in co-relation 72516. Up to 12050 conditions per place. [2024-06-27 17:59:28,944 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 90 changer transitions 0/358 dead transitions. [2024-06-27 17:59:28,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 358 transitions, 5593 flow [2024-06-27 17:59:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:59:28,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-06-27 17:59:28,945 INFO L175 Difference]: Start difference. First operand has 241 places, 335 transitions, 4396 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:59:28,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 358 transitions, 5593 flow [2024-06-27 17:59:30,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 358 transitions, 5444 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:30,885 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 4478 flow [2024-06-27 17:59:30,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4478, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2024-06-27 17:59:30,886 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-06-27 17:59:30,886 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 4478 flow [2024-06-27 17:59:30,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:30,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:30,886 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 17:59:30,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:59:30,886 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 17:59:30,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:30,887 INFO L85 PathProgramCache]: Analyzing trace with hash -519774516, now seen corresponding path program 3 times [2024-06-27 17:59:30,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:30,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213741051] [2024-06-27 17:59:30,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:30,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213741051] [2024-06-27 17:59:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213741051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:30,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:30,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:30,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291699237] [2024-06-27 17:59:30,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:30,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:30,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 4478 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:30,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:30,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:30,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:32,759 INFO L124 PetriNetUnfolderBase]: 7934/13699 cut-off events. [2024-06-27 17:59:32,759 INFO L125 PetriNetUnfolderBase]: For 484132/484188 co-relation queries the response was YES. [2024-06-27 17:59:32,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73633 conditions, 13699 events. 7934/13699 cut-off events. For 484132/484188 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 112812 event pairs, 3700 based on Foata normal form. 27/13255 useless extension candidates. Maximal degree in co-relation 73522. Up to 12084 conditions per place. [2024-06-27 17:59:32,956 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 93 changer transitions 0/364 dead transitions. [2024-06-27 17:59:32,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 364 transitions, 5754 flow [2024-06-27 17:59:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:59:32,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-27 17:59:32,957 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 4478 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:59:32,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 364 transitions, 5754 flow [2024-06-27 17:59:34,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 364 transitions, 5610 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:34,300 INFO L231 Difference]: Finished difference. Result has 247 places, 341 transitions, 4628 flow [2024-06-27 17:59:34,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4628, PETRI_PLACES=247, PETRI_TRANSITIONS=341} [2024-06-27 17:59:34,301 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-06-27 17:59:34,301 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 341 transitions, 4628 flow [2024-06-27 17:59:34,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:34,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:34,301 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 17:59:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:59:34,302 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 17:59:34,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:34,302 INFO L85 PathProgramCache]: Analyzing trace with hash 104218050, now seen corresponding path program 1 times [2024-06-27 17:59:34,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:34,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981986606] [2024-06-27 17:59:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981986606] [2024-06-27 17:59:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981986606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:34,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953467845] [2024-06-27 17:59:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:34,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:34,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:34,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 341 transitions, 4628 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:34,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:34,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:34,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:36,544 INFO L124 PetriNetUnfolderBase]: 7940/13706 cut-off events. [2024-06-27 17:59:36,545 INFO L125 PetriNetUnfolderBase]: For 491005/491053 co-relation queries the response was YES. [2024-06-27 17:59:36,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74158 conditions, 13706 events. 7940/13706 cut-off events. For 491005/491053 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 112650 event pairs, 3709 based on Foata normal form. 25/13256 useless extension candidates. Maximal degree in co-relation 74046. Up to 12131 conditions per place. [2024-06-27 17:59:36,664 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 268 selfloop transitions, 84 changer transitions 0/368 dead transitions. [2024-06-27 17:59:36,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 368 transitions, 5569 flow [2024-06-27 17:59:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:59:36,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 17:59:36,666 INFO L175 Difference]: Start difference. First operand has 247 places, 341 transitions, 4628 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:59:36,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 368 transitions, 5569 flow [2024-06-27 17:59:38,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 368 transitions, 5297 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:38,553 INFO L231 Difference]: Finished difference. Result has 249 places, 344 transitions, 4563 flow [2024-06-27 17:59:38,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4563, PETRI_PLACES=249, PETRI_TRANSITIONS=344} [2024-06-27 17:59:38,554 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-06-27 17:59:38,554 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 344 transitions, 4563 flow [2024-06-27 17:59:38,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:38,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:38,555 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 17:59:38,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:59:38,555 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 17:59:38,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash -398375302, now seen corresponding path program 2 times [2024-06-27 17:59:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:38,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828360495] [2024-06-27 17:59:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:38,605 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 17:59:38,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828360495] [2024-06-27 17:59:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828360495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:38,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811271115] [2024-06-27 17:59:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:38,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:38,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:38,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:38,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 344 transitions, 4563 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:38,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:38,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:38,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:40,385 INFO L124 PetriNetUnfolderBase]: 7955/13724 cut-off events. [2024-06-27 17:59:40,385 INFO L125 PetriNetUnfolderBase]: For 497599/497651 co-relation queries the response was YES. [2024-06-27 17:59:40,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73795 conditions, 13724 events. 7955/13724 cut-off events. For 497599/497651 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 112888 event pairs, 3702 based on Foata normal form. 28/13276 useless extension candidates. Maximal degree in co-relation 73682. Up to 12143 conditions per place. [2024-06-27 17:59:40,538 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 260 selfloop transitions, 92 changer transitions 0/368 dead transitions. [2024-06-27 17:59:40,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 368 transitions, 5681 flow [2024-06-27 17:59:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:59:40,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 17:59:40,540 INFO L175 Difference]: Start difference. First operand has 249 places, 344 transitions, 4563 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:59:40,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 368 transitions, 5681 flow [2024-06-27 17:59:42,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 368 transitions, 5501 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:42,336 INFO L231 Difference]: Finished difference. Result has 250 places, 350 transitions, 4651 flow [2024-06-27 17:59:42,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4651, PETRI_PLACES=250, PETRI_TRANSITIONS=350} [2024-06-27 17:59:42,336 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-06-27 17:59:42,336 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 350 transitions, 4651 flow [2024-06-27 17:59:42,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:42,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:42,337 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 17:59:42,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:59:42,337 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 17:59:42,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2087348332, now seen corresponding path program 3 times [2024-06-27 17:59:42,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:42,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634305054] [2024-06-27 17:59:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:42,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:42,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:42,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634305054] [2024-06-27 17:59:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634305054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:42,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:42,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:42,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916025763] [2024-06-27 17:59:42,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:42,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:42,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 350 transitions, 4651 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:42,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:42,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:42,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:44,241 INFO L124 PetriNetUnfolderBase]: 7952/13717 cut-off events. [2024-06-27 17:59:44,241 INFO L125 PetriNetUnfolderBase]: For 505945/505970 co-relation queries the response was YES. [2024-06-27 17:59:44,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73836 conditions, 13717 events. 7952/13717 cut-off events. For 505945/505970 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 112808 event pairs, 3684 based on Foata normal form. 16/13251 useless extension candidates. Maximal degree in co-relation 73722. Up to 12138 conditions per place. [2024-06-27 17:59:44,372 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 271 selfloop transitions, 85 changer transitions 0/372 dead transitions. [2024-06-27 17:59:44,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 372 transitions, 5713 flow [2024-06-27 17:59:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:59:44,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-27 17:59:44,374 INFO L175 Difference]: Start difference. First operand has 250 places, 350 transitions, 4651 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:59:44,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 372 transitions, 5713 flow [2024-06-27 17:59:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 372 transitions, 5597 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:59:46,101 INFO L231 Difference]: Finished difference. Result has 255 places, 350 transitions, 4711 flow [2024-06-27 17:59:46,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4711, PETRI_PLACES=255, PETRI_TRANSITIONS=350} [2024-06-27 17:59:46,102 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-06-27 17:59:46,102 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 350 transitions, 4711 flow [2024-06-27 17:59:46,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:46,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:46,102 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 17:59:46,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:59:46,103 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 17:59:46,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1324187902, now seen corresponding path program 4 times [2024-06-27 17:59:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:46,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948940891] [2024-06-27 17:59:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:46,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:46,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948940891] [2024-06-27 17:59:46,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948940891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:46,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:46,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111076598] [2024-06-27 17:59:46,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:46,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:46,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:46,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 350 transitions, 4711 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:46,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:46,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:46,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:48,030 INFO L124 PetriNetUnfolderBase]: 7946/13704 cut-off events. [2024-06-27 17:59:48,030 INFO L125 PetriNetUnfolderBase]: For 516550/516631 co-relation queries the response was YES. [2024-06-27 17:59:48,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73818 conditions, 13704 events. 7946/13704 cut-off events. For 516550/516631 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 112871 event pairs, 3723 based on Foata normal form. 60/13290 useless extension candidates. Maximal degree in co-relation 73703. Up to 12133 conditions per place. [2024-06-27 17:59:48,170 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 263 selfloop transitions, 84 changer transitions 0/363 dead transitions. [2024-06-27 17:59:48,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 363 transitions, 5735 flow [2024-06-27 17:59:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:48,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:59:48,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-06-27 17:59:48,172 INFO L175 Difference]: Start difference. First operand has 255 places, 350 transitions, 4711 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:59:48,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 363 transitions, 5735 flow [2024-06-27 17:59:49,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 363 transitions, 5495 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:49,947 INFO L231 Difference]: Finished difference. Result has 255 places, 350 transitions, 4646 flow [2024-06-27 17:59:49,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4646, PETRI_PLACES=255, PETRI_TRANSITIONS=350} [2024-06-27 17:59:49,947 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-06-27 17:59:49,948 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 350 transitions, 4646 flow [2024-06-27 17:59:49,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:49,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:49,948 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 17:59:49,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:59:49,948 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 17:59:49,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:49,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1885225214, now seen corresponding path program 4 times [2024-06-27 17:59:49,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:49,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982041454] [2024-06-27 17:59:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:49,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:50,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:50,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982041454] [2024-06-27 17:59:50,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982041454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:50,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:50,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186601513] [2024-06-27 17:59:50,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:50,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:50,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:50,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:50,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 350 transitions, 4646 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:50,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:50,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:50,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:51,954 INFO L124 PetriNetUnfolderBase]: 8110/13983 cut-off events. [2024-06-27 17:59:51,956 INFO L125 PetriNetUnfolderBase]: For 582599/582674 co-relation queries the response was YES. [2024-06-27 17:59:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75684 conditions, 13983 events. 8110/13983 cut-off events. For 582599/582674 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115541 event pairs, 3770 based on Foata normal form. 75/13577 useless extension candidates. Maximal degree in co-relation 75568. Up to 12197 conditions per place. [2024-06-27 17:59:52,204 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 270 selfloop transitions, 86 changer transitions 0/372 dead transitions. [2024-06-27 17:59:52,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 372 transitions, 5826 flow [2024-06-27 17:59:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:59:52,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-06-27 17:59:52,207 INFO L175 Difference]: Start difference. First operand has 255 places, 350 transitions, 4646 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:59:52,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 372 transitions, 5826 flow [2024-06-27 17:59:54,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 372 transitions, 5630 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:54,047 INFO L231 Difference]: Finished difference. Result has 256 places, 353 transitions, 4737 flow [2024-06-27 17:59:54,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4737, PETRI_PLACES=256, PETRI_TRANSITIONS=353} [2024-06-27 17:59:54,048 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 205 predicate places. [2024-06-27 17:59:54,048 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 353 transitions, 4737 flow [2024-06-27 17:59:54,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:54,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:54,048 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 17:59:54,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:59:54,048 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 17:59:54,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1250739996, now seen corresponding path program 3 times [2024-06-27 17:59:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:54,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372734938] [2024-06-27 17:59:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:54,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:54,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372734938] [2024-06-27 17:59:54,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372734938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:54,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:54,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:54,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988856611] [2024-06-27 17:59:54,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:54,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:54,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:54,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 353 transitions, 4737 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:54,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:54,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:54,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:56,297 INFO L124 PetriNetUnfolderBase]: 8116/13999 cut-off events. [2024-06-27 17:59:56,298 INFO L125 PetriNetUnfolderBase]: For 540938/540946 co-relation queries the response was YES. [2024-06-27 17:59:56,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76273 conditions, 13999 events. 8116/13999 cut-off events. For 540938/540946 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115564 event pairs, 3746 based on Foata normal form. 1/13504 useless extension candidates. Maximal degree in co-relation 76155. Up to 12388 conditions per place. [2024-06-27 17:59:56,428 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 277 selfloop transitions, 84 changer transitions 0/377 dead transitions. [2024-06-27 17:59:56,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 377 transitions, 5701 flow [2024-06-27 17:59:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:59:56,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-27 17:59:56,430 INFO L175 Difference]: Start difference. First operand has 256 places, 353 transitions, 4737 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:59:56,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 377 transitions, 5701 flow [2024-06-27 17:59:58,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 377 transitions, 5454 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:58,099 INFO L231 Difference]: Finished difference. Result has 258 places, 356 transitions, 4702 flow [2024-06-27 17:59:58,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4490, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4702, PETRI_PLACES=258, PETRI_TRANSITIONS=356} [2024-06-27 17:59:58,099 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 207 predicate places. [2024-06-27 17:59:58,099 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 356 transitions, 4702 flow [2024-06-27 17:59:58,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:58,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:58,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:58,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:59:58,100 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 17:59:58,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1359582980, now seen corresponding path program 4 times [2024-06-27 17:59:58,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737122252] [2024-06-27 17:59:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:58,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:58,176 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 17:59:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:58,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737122252] [2024-06-27 17:59:58,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737122252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:58,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:58,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643920938] [2024-06-27 17:59:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:58,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:58,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:58,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 17:59:58,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 356 transitions, 4702 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:58,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:58,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 17:59:58,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:00,147 INFO L124 PetriNetUnfolderBase]: 8113/13989 cut-off events. [2024-06-27 18:00:00,147 INFO L125 PetriNetUnfolderBase]: For 535897/535897 co-relation queries the response was YES. [2024-06-27 18:00:00,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74880 conditions, 13989 events. 8113/13989 cut-off events. For 535897/535897 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115306 event pairs, 3739 based on Foata normal form. 1/13488 useless extension candidates. Maximal degree in co-relation 74761. Up to 12386 conditions per place. [2024-06-27 18:00:00,322 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 278 selfloop transitions, 86 changer transitions 0/380 dead transitions. [2024-06-27 18:00:00,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 380 transitions, 5800 flow [2024-06-27 18:00:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:00:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:00:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-27 18:00:00,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607565011820331 [2024-06-27 18:00:00,323 INFO L175 Difference]: Start difference. First operand has 258 places, 356 transitions, 4702 flow. Second operand 9 states and 257 transitions. [2024-06-27 18:00:00,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 380 transitions, 5800 flow [2024-06-27 18:00:02,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 380 transitions, 5679 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:02,338 INFO L231 Difference]: Finished difference. Result has 263 places, 356 transitions, 4759 flow [2024-06-27 18:00:02,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4759, PETRI_PLACES=263, PETRI_TRANSITIONS=356} [2024-06-27 18:00:02,338 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 212 predicate places. [2024-06-27 18:00:02,338 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 356 transitions, 4759 flow [2024-06-27 18:00:02,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:02,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:02,339 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 18:00:02,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 18:00:02,339 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 18:00:02,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash 99031046, now seen corresponding path program 5 times [2024-06-27 18:00:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:02,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162331182] [2024-06-27 18:00:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:02,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:02,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162331182] [2024-06-27 18:00:02,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162331182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:02,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:02,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:02,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853166574] [2024-06-27 18:00:02,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:02,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:00:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:00:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:00:02,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:02,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 356 transitions, 4759 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:02,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:02,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:04,359 INFO L124 PetriNetUnfolderBase]: 8105/13976 cut-off events. [2024-06-27 18:00:04,359 INFO L125 PetriNetUnfolderBase]: For 545044/545044 co-relation queries the response was YES. [2024-06-27 18:00:04,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74822 conditions, 13976 events. 8105/13976 cut-off events. For 545044/545044 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115323 event pairs, 3739 based on Foata normal form. 2/13476 useless extension candidates. Maximal degree in co-relation 74701. Up to 12378 conditions per place. [2024-06-27 18:00:04,516 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 278 selfloop transitions, 80 changer transitions 0/374 dead transitions. [2024-06-27 18:00:04,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 374 transitions, 5677 flow [2024-06-27 18:00:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 18:00:04,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-06-27 18:00:04,517 INFO L175 Difference]: Start difference. First operand has 263 places, 356 transitions, 4759 flow. Second operand 7 states and 205 transitions. [2024-06-27 18:00:04,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 374 transitions, 5677 flow [2024-06-27 18:00:07,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 374 transitions, 5431 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 18:00:07,170 INFO L231 Difference]: Finished difference. Result has 261 places, 356 transitions, 4681 flow [2024-06-27 18:00:07,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4681, PETRI_PLACES=261, PETRI_TRANSITIONS=356} [2024-06-27 18:00:07,171 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-27 18:00:07,171 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 356 transitions, 4681 flow [2024-06-27 18:00:07,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:07,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:07,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:07,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 18:00:07,172 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 18:00:07,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2131260096, now seen corresponding path program 6 times [2024-06-27 18:00:07,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:07,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267320] [2024-06-27 18:00:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:07,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:07,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:07,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267320] [2024-06-27 18:00:07,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:07,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:07,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:00:07,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179698800] [2024-06-27 18:00:07,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:07,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:00:07,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:00:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:00:07,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:07,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 356 transitions, 4681 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:07,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:07,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:07,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:09,384 INFO L124 PetriNetUnfolderBase]: 8118/13997 cut-off events. [2024-06-27 18:00:09,385 INFO L125 PetriNetUnfolderBase]: For 557027/557075 co-relation queries the response was YES. [2024-06-27 18:00:09,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75079 conditions, 13997 events. 8118/13997 cut-off events. For 557027/557075 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115663 event pairs, 3769 based on Foata normal form. 34/13537 useless extension candidates. Maximal degree in co-relation 74958. Up to 12391 conditions per place. [2024-06-27 18:00:09,755 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 268 selfloop transitions, 87 changer transitions 0/371 dead transitions. [2024-06-27 18:00:09,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 371 transitions, 5636 flow [2024-06-27 18:00:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:00:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:00:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 18:00:09,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205673758865248 [2024-06-27 18:00:09,758 INFO L175 Difference]: Start difference. First operand has 261 places, 356 transitions, 4681 flow. Second operand 6 states and 175 transitions. [2024-06-27 18:00:09,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 371 transitions, 5636 flow [2024-06-27 18:00:12,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 5470 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:12,665 INFO L231 Difference]: Finished difference. Result has 261 places, 360 transitions, 4755 flow [2024-06-27 18:00:12,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4755, PETRI_PLACES=261, PETRI_TRANSITIONS=360} [2024-06-27 18:00:12,666 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-27 18:00:12,666 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 360 transitions, 4755 flow [2024-06-27 18:00:12,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:12,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:12,666 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 18:00:12,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 18:00:12,667 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 18:00:12,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2034965388, now seen corresponding path program 7 times [2024-06-27 18:00:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:12,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465272663] [2024-06-27 18:00:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:12,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465272663] [2024-06-27 18:00:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465272663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:12,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:12,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:00:12,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938403155] [2024-06-27 18:00:12,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:12,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:00:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:12,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:00:12,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:00:12,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:12,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 360 transitions, 4755 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:12,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:12,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:12,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:16,140 INFO L124 PetriNetUnfolderBase]: 8110/13985 cut-off events. [2024-06-27 18:00:16,141 INFO L125 PetriNetUnfolderBase]: For 561749/561795 co-relation queries the response was YES. [2024-06-27 18:00:16,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74979 conditions, 13985 events. 8110/13985 cut-off events. For 561749/561795 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115419 event pairs, 3769 based on Foata normal form. 34/13524 useless extension candidates. Maximal degree in co-relation 74857. Up to 12383 conditions per place. [2024-06-27 18:00:16,361 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 271 selfloop transitions, 83 changer transitions 0/370 dead transitions. [2024-06-27 18:00:16,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 370 transitions, 5487 flow [2024-06-27 18:00:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:00:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:00:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 18:00:16,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-06-27 18:00:16,362 INFO L175 Difference]: Start difference. First operand has 261 places, 360 transitions, 4755 flow. Second operand 6 states and 173 transitions. [2024-06-27 18:00:16,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 370 transitions, 5487 flow [2024-06-27 18:00:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 370 transitions, 5175 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:19,003 INFO L231 Difference]: Finished difference. Result has 261 places, 360 transitions, 4618 flow [2024-06-27 18:00:19,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4618, PETRI_PLACES=261, PETRI_TRANSITIONS=360} [2024-06-27 18:00:19,004 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-27 18:00:19,004 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 360 transitions, 4618 flow [2024-06-27 18:00:19,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:19,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:19,004 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 18:00:19,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 18:00:19,005 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 18:00:19,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1190304704, now seen corresponding path program 1 times [2024-06-27 18:00:19,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:19,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150767370] [2024-06-27 18:00:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:19,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:19,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150767370] [2024-06-27 18:00:19,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150767370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:19,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:19,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642817469] [2024-06-27 18:00:19,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:19,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:00:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:00:19,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:00:19,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:19,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 360 transitions, 4618 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:19,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:19,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:19,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:22,730 INFO L124 PetriNetUnfolderBase]: 8157/14151 cut-off events. [2024-06-27 18:00:22,730 INFO L125 PetriNetUnfolderBase]: For 585495/585495 co-relation queries the response was YES. [2024-06-27 18:00:22,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76201 conditions, 14151 events. 8157/14151 cut-off events. For 585495/585495 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 117398 event pairs, 3533 based on Foata normal form. 2/13648 useless extension candidates. Maximal degree in co-relation 76078. Up to 12604 conditions per place. [2024-06-27 18:00:22,907 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 349 selfloop transitions, 27 changer transitions 0/392 dead transitions. [2024-06-27 18:00:22,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 392 transitions, 5760 flow [2024-06-27 18:00:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 18:00:22,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037234042553191 [2024-06-27 18:00:22,909 INFO L175 Difference]: Start difference. First operand has 261 places, 360 transitions, 4618 flow. Second operand 8 states and 227 transitions. [2024-06-27 18:00:22,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 392 transitions, 5760 flow [2024-06-27 18:00:24,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 392 transitions, 5560 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:24,886 INFO L231 Difference]: Finished difference. Result has 263 places, 364 transitions, 4633 flow [2024-06-27 18:00:24,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4633, PETRI_PLACES=263, PETRI_TRANSITIONS=364} [2024-06-27 18:00:24,887 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 212 predicate places. [2024-06-27 18:00:24,887 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 364 transitions, 4633 flow [2024-06-27 18:00:24,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:24,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:24,888 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 18:00:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 18:00:24,888 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 18:00:24,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -268880926, now seen corresponding path program 2 times [2024-06-27 18:00:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817275946] [2024-06-27 18:00:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:24,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:24,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817275946] [2024-06-27 18:00:24,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817275946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:24,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:24,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356658056] [2024-06-27 18:00:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:00:24,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:00:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:00:25,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:25,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 364 transitions, 4633 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:25,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:25,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:25,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:27,647 INFO L124 PetriNetUnfolderBase]: 8152/14030 cut-off events. [2024-06-27 18:00:27,647 INFO L125 PetriNetUnfolderBase]: For 591581/591581 co-relation queries the response was YES. [2024-06-27 18:00:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75917 conditions, 14030 events. 8152/14030 cut-off events. For 591581/591581 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 115495 event pairs, 3717 based on Foata normal form. 2/13525 useless extension candidates. Maximal degree in co-relation 75793. Up to 12661 conditions per place. [2024-06-27 18:00:27,941 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 346 selfloop transitions, 22 changer transitions 0/384 dead transitions. [2024-06-27 18:00:27,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 384 transitions, 5421 flow [2024-06-27 18:00:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 18:00:27,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987841945288754 [2024-06-27 18:00:27,944 INFO L175 Difference]: Start difference. First operand has 263 places, 364 transitions, 4633 flow. Second operand 7 states and 197 transitions. [2024-06-27 18:00:27,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 384 transitions, 5421 flow [2024-06-27 18:00:30,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 384 transitions, 5258 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:30,176 INFO L231 Difference]: Finished difference. Result has 266 places, 364 transitions, 4519 flow [2024-06-27 18:00:30,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4519, PETRI_PLACES=266, PETRI_TRANSITIONS=364} [2024-06-27 18:00:30,177 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-27 18:00:30,177 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 364 transitions, 4519 flow [2024-06-27 18:00:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:30,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:30,178 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 18:00:30,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 18:00:30,178 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 18:00:30,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1632653922, now seen corresponding path program 3 times [2024-06-27 18:00:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:30,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049938440] [2024-06-27 18:00:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:30,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:30,314 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 18:00:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049938440] [2024-06-27 18:00:30,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049938440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:30,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:30,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:00:30,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838172792] [2024-06-27 18:00:30,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:30,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:00:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:00:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:00:30,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:30,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 364 transitions, 4519 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:30,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:30,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:30,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:32,695 INFO L124 PetriNetUnfolderBase]: 8147/14020 cut-off events. [2024-06-27 18:00:32,695 INFO L125 PetriNetUnfolderBase]: For 591907/591919 co-relation queries the response was YES. [2024-06-27 18:00:32,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75209 conditions, 14020 events. 8147/14020 cut-off events. For 591907/591919 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 115516 event pairs, 3723 based on Foata normal form. 11/13525 useless extension candidates. Maximal degree in co-relation 75083. Up to 12654 conditions per place. [2024-06-27 18:00:32,844 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 341 selfloop transitions, 22 changer transitions 0/379 dead transitions. [2024-06-27 18:00:32,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 379 transitions, 5359 flow [2024-06-27 18:00:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:00:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:00:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 18:00:32,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-06-27 18:00:32,845 INFO L175 Difference]: Start difference. First operand has 266 places, 364 transitions, 4519 flow. Second operand 6 states and 168 transitions. [2024-06-27 18:00:32,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 379 transitions, 5359 flow [2024-06-27 18:00:34,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 379 transitions, 5305 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:34,771 INFO L231 Difference]: Finished difference. Result has 266 places, 366 transitions, 4598 flow [2024-06-27 18:00:34,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4598, PETRI_PLACES=266, PETRI_TRANSITIONS=366} [2024-06-27 18:00:34,772 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-27 18:00:34,772 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 366 transitions, 4598 flow [2024-06-27 18:00:34,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:34,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:34,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:34,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 18:00:34,773 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 18:00:34,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -77145410, now seen corresponding path program 1 times [2024-06-27 18:00:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:34,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894898108] [2024-06-27 18:00:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:34,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:34,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894898108] [2024-06-27 18:00:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894898108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:34,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:34,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:00:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746901827] [2024-06-27 18:00:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:00:34,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:00:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:00:34,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:34,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 366 transitions, 4598 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:34,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:34,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:34,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:38,315 INFO L124 PetriNetUnfolderBase]: 8154/14051 cut-off events. [2024-06-27 18:00:38,316 INFO L125 PetriNetUnfolderBase]: For 601689/601695 co-relation queries the response was YES. [2024-06-27 18:00:38,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75550 conditions, 14051 events. 8154/14051 cut-off events. For 601689/601695 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 115807 event pairs, 3727 based on Foata normal form. 4/13545 useless extension candidates. Maximal degree in co-relation 75423. Up to 12550 conditions per place. [2024-06-27 18:00:39,019 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 311 selfloop transitions, 56 changer transitions 0/383 dead transitions. [2024-06-27 18:00:39,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 383 transitions, 5591 flow [2024-06-27 18:00:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:00:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:00:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 18:00:39,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 18:00:39,021 INFO L175 Difference]: Start difference. First operand has 266 places, 366 transitions, 4598 flow. Second operand 6 states and 177 transitions. [2024-06-27 18:00:39,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 383 transitions, 5591 flow [2024-06-27 18:00:42,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 383 transitions, 5474 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:42,239 INFO L231 Difference]: Finished difference. Result has 268 places, 369 transitions, 4659 flow [2024-06-27 18:00:42,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4659, PETRI_PLACES=268, PETRI_TRANSITIONS=369} [2024-06-27 18:00:42,240 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 217 predicate places. [2024-06-27 18:00:42,240 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 369 transitions, 4659 flow [2024-06-27 18:00:42,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:42,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:42,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:42,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 18:00:42,241 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 18:00:42,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash -620399642, now seen corresponding path program 2 times [2024-06-27 18:00:42,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:42,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124628953] [2024-06-27 18:00:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:42,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:42,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124628953] [2024-06-27 18:00:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124628953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:42,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:00:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082628728] [2024-06-27 18:00:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:00:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:00:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:00:42,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:42,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 369 transitions, 4659 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:42,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:42,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:42,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:46,195 INFO L124 PetriNetUnfolderBase]: 8151/14047 cut-off events. [2024-06-27 18:00:46,195 INFO L125 PetriNetUnfolderBase]: For 606287/606295 co-relation queries the response was YES. [2024-06-27 18:00:46,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75371 conditions, 14047 events. 8151/14047 cut-off events. For 606287/606295 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 115956 event pairs, 3727 based on Foata normal form. 7/13544 useless extension candidates. Maximal degree in co-relation 75243. Up to 12547 conditions per place. [2024-06-27 18:00:46,426 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 308 selfloop transitions, 58 changer transitions 0/382 dead transitions. [2024-06-27 18:00:46,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 382 transitions, 5423 flow [2024-06-27 18:00:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:00:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:00:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 18:00:46,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-06-27 18:00:46,428 INFO L175 Difference]: Start difference. First operand has 268 places, 369 transitions, 4659 flow. Second operand 6 states and 176 transitions. [2024-06-27 18:00:46,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 382 transitions, 5423 flow [2024-06-27 18:00:49,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 382 transitions, 5321 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:49,944 INFO L231 Difference]: Finished difference. Result has 270 places, 369 transitions, 4686 flow [2024-06-27 18:00:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4686, PETRI_PLACES=270, PETRI_TRANSITIONS=369} [2024-06-27 18:00:49,945 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 219 predicate places. [2024-06-27 18:00:49,945 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 369 transitions, 4686 flow [2024-06-27 18:00:49,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:49,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:49,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:49,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 18:00:49,946 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 18:00:49,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash 50638166, now seen corresponding path program 1 times [2024-06-27 18:00:49,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:49,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299856570] [2024-06-27 18:00:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:49,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:50,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:50,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299856570] [2024-06-27 18:00:50,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299856570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:50,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:50,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:50,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050257908] [2024-06-27 18:00:50,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:50,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:00:50,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:00:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:00:50,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:50,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 369 transitions, 4686 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:50,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:50,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:50,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:53,511 INFO L124 PetriNetUnfolderBase]: 8441/14523 cut-off events. [2024-06-27 18:00:53,511 INFO L125 PetriNetUnfolderBase]: For 714364/714370 co-relation queries the response was YES. [2024-06-27 18:00:53,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79885 conditions, 14523 events. 8441/14523 cut-off events. For 714364/714370 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 120266 event pairs, 3510 based on Foata normal form. 15/14026 useless extension candidates. Maximal degree in co-relation 79757. Up to 12022 conditions per place. [2024-06-27 18:00:53,692 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 322 selfloop transitions, 68 changer transitions 0/406 dead transitions. [2024-06-27 18:00:53,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 406 transitions, 5874 flow [2024-06-27 18:00:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 18:00:53,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504559270516718 [2024-06-27 18:00:53,694 INFO L175 Difference]: Start difference. First operand has 270 places, 369 transitions, 4686 flow. Second operand 7 states and 214 transitions. [2024-06-27 18:00:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 406 transitions, 5874 flow [2024-06-27 18:00:55,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 406 transitions, 5700 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:00:55,707 INFO L231 Difference]: Finished difference. Result has 271 places, 373 transitions, 4802 flow [2024-06-27 18:00:55,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4802, PETRI_PLACES=271, PETRI_TRANSITIONS=373} [2024-06-27 18:00:55,708 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 220 predicate places. [2024-06-27 18:00:55,708 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 373 transitions, 4802 flow [2024-06-27 18:00:55,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:55,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:55,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:55,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 18:00:55,709 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 18:00:55,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1103798268, now seen corresponding path program 2 times [2024-06-27 18:00:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058363177] [2024-06-27 18:00:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:55,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:55,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058363177] [2024-06-27 18:00:55,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058363177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:55,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:55,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448063388] [2024-06-27 18:00:55,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:55,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:00:55,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:00:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:00:55,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:00:55,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 373 transitions, 4802 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:55,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:55,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:00:55,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:58,605 INFO L124 PetriNetUnfolderBase]: 8639/14888 cut-off events. [2024-06-27 18:00:58,605 INFO L125 PetriNetUnfolderBase]: For 756902/756910 co-relation queries the response was YES. [2024-06-27 18:00:58,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83983 conditions, 14888 events. 8639/14888 cut-off events. For 756902/756910 co-relation queries the response was YES. Maximal size of possible extension queue 967. Compared 124012 event pairs, 3830 based on Foata normal form. 18/14386 useless extension candidates. Maximal degree in co-relation 83854. Up to 12823 conditions per place. [2024-06-27 18:00:58,759 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 318 selfloop transitions, 69 changer transitions 0/403 dead transitions. [2024-06-27 18:00:58,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 403 transitions, 5952 flow [2024-06-27 18:00:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 18:00:58,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:00:58,761 INFO L175 Difference]: Start difference. First operand has 271 places, 373 transitions, 4802 flow. Second operand 7 states and 210 transitions. [2024-06-27 18:00:58,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 403 transitions, 5952 flow [2024-06-27 18:01:01,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 403 transitions, 5845 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 18:01:01,414 INFO L231 Difference]: Finished difference. Result has 275 places, 377 transitions, 4956 flow [2024-06-27 18:01:01,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4956, PETRI_PLACES=275, PETRI_TRANSITIONS=377} [2024-06-27 18:01:01,414 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 224 predicate places. [2024-06-27 18:01:01,414 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 377 transitions, 4956 flow [2024-06-27 18:01:01,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:01,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:01,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:01,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 18:01:01,415 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:01,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash -620135708, now seen corresponding path program 3 times [2024-06-27 18:01:01,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:01,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172934935] [2024-06-27 18:01:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:01,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172934935] [2024-06-27 18:01:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172934935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:01,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:01,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:01:01,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593100599] [2024-06-27 18:01:01,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:01:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:01:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:01:01,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:01:01,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 377 transitions, 4956 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:01,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:01,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:01:01,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:04,201 INFO L124 PetriNetUnfolderBase]: 8603/14893 cut-off events. [2024-06-27 18:01:04,202 INFO L125 PetriNetUnfolderBase]: For 722566/722572 co-relation queries the response was YES. [2024-06-27 18:01:04,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82323 conditions, 14893 events. 8603/14893 cut-off events. For 722566/722572 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 124614 event pairs, 3878 based on Foata normal form. 22/14393 useless extension candidates. Maximal degree in co-relation 82192. Up to 13031 conditions per place. [2024-06-27 18:01:04,380 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 317 selfloop transitions, 64 changer transitions 0/397 dead transitions. [2024-06-27 18:01:04,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 397 transitions, 5784 flow [2024-06-27 18:01:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:01:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:01:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 18:01:04,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291793313069909 [2024-06-27 18:01:04,381 INFO L175 Difference]: Start difference. First operand has 275 places, 377 transitions, 4956 flow. Second operand 7 states and 207 transitions. [2024-06-27 18:01:04,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 397 transitions, 5784 flow [2024-06-27 18:01:07,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 397 transitions, 5647 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 18:01:07,101 INFO L231 Difference]: Finished difference. Result has 279 places, 377 transitions, 4958 flow [2024-06-27 18:01:07,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4819, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4958, PETRI_PLACES=279, PETRI_TRANSITIONS=377} [2024-06-27 18:01:07,104 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 228 predicate places. [2024-06-27 18:01:07,104 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 377 transitions, 4958 flow [2024-06-27 18:01:07,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:07,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:07,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:07,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 18:01:07,105 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:07,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash -589339458, now seen corresponding path program 3 times [2024-06-27 18:01:07,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:07,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023945270] [2024-06-27 18:01:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:07,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:07,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:07,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023945270] [2024-06-27 18:01:07,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023945270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:07,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:01:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324429864] [2024-06-27 18:01:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:01:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:01:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:01:07,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:01:07,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 377 transitions, 4958 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:07,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:07,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:01:07,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:09,913 INFO L124 PetriNetUnfolderBase]: 8610/14846 cut-off events. [2024-06-27 18:01:09,913 INFO L125 PetriNetUnfolderBase]: For 670226/670240 co-relation queries the response was YES. [2024-06-27 18:01:10,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81892 conditions, 14846 events. 8610/14846 cut-off events. For 670226/670240 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 123710 event pairs, 3957 based on Foata normal form. 10/14320 useless extension candidates. Maximal degree in co-relation 81759. Up to 13152 conditions per place. [2024-06-27 18:01:10,075 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 293 selfloop transitions, 90 changer transitions 0/399 dead transitions. [2024-06-27 18:01:10,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 6177 flow [2024-06-27 18:01:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:01:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:01:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 18:01:10,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 18:01:10,077 INFO L175 Difference]: Start difference. First operand has 279 places, 377 transitions, 4958 flow. Second operand 7 states and 203 transitions. [2024-06-27 18:01:10,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 6177 flow [2024-06-27 18:01:13,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 399 transitions, 6025 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:01:13,588 INFO L231 Difference]: Finished difference. Result has 280 places, 380 transitions, 5048 flow [2024-06-27 18:01:13,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5048, PETRI_PLACES=280, PETRI_TRANSITIONS=380} [2024-06-27 18:01:13,589 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 229 predicate places. [2024-06-27 18:01:13,589 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 380 transitions, 5048 flow [2024-06-27 18:01:13,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:13,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:13,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:13,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 18:01:13,590 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:13,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1400352312, now seen corresponding path program 4 times [2024-06-27 18:01:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713590396] [2024-06-27 18:01:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713590396] [2024-06-27 18:01:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713590396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:13,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:13,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:01:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224851572] [2024-06-27 18:01:13,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:01:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:01:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:01:13,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:01:13,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 380 transitions, 5048 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:13,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:13,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:01:13,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:16,309 INFO L124 PetriNetUnfolderBase]: 8617/14881 cut-off events. [2024-06-27 18:01:16,309 INFO L125 PetriNetUnfolderBase]: For 681221/681234 co-relation queries the response was YES. [2024-06-27 18:01:16,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81894 conditions, 14881 events. 8617/14881 cut-off events. For 681221/681234 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 124154 event pairs, 3974 based on Foata normal form. 8/14356 useless extension candidates. Maximal degree in co-relation 81760. Up to 13160 conditions per place. [2024-06-27 18:01:16,508 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 292 selfloop transitions, 93 changer transitions 0/401 dead transitions. [2024-06-27 18:01:16,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 401 transitions, 6279 flow [2024-06-27 18:01:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:01:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:01:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:01:16,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:01:16,510 INFO L175 Difference]: Start difference. First operand has 280 places, 380 transitions, 5048 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:01:16,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 401 transitions, 6279 flow [2024-06-27 18:01:18,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 401 transitions, 6060 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:01:18,923 INFO L231 Difference]: Finished difference. Result has 281 places, 383 transitions, 5083 flow [2024-06-27 18:01:18,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5083, PETRI_PLACES=281, PETRI_TRANSITIONS=383} [2024-06-27 18:01:18,924 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 230 predicate places. [2024-06-27 18:01:18,924 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 383 transitions, 5083 flow [2024-06-27 18:01:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:18,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:18,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 18:01:18,925 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash 803745816, now seen corresponding path program 5 times [2024-06-27 18:01:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239764861] [2024-06-27 18:01:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:18,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239764861] [2024-06-27 18:01:18,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239764861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:18,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:18,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:01:18,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678231580] [2024-06-27 18:01:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:18,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:01:18,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:18,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:01:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:01:19,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-27 18:01:19,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 383 transitions, 5083 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:19,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:19,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-27 18:01:19,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand