./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe005_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe005_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe005_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:03:09,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:03:09,363 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:03:09,367 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:03:09,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:03:09,395 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:03:09,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:03:09,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:03:09,397 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:03:09,401 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:03:09,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:03:09,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:03:09,402 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:03:09,403 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:03:09,403 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:03:09,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:03:09,404 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:03:09,404 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:03:09,404 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:03:09,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:03:09,405 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:03:09,405 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:03:09,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:03:09,405 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:03:09,406 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:03:09,406 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:03:09,406 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:03:09,406 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:03:09,407 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:03:09,407 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:03:09,408 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:03:09,408 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:03:09,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:09,409 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:03:09,409 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:03:09,409 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:03:09,409 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:03:09,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:03:09,409 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:03:09,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:03:09,410 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:03:09,410 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:03:09,410 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:03:09,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:03:09,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:03:09,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:03:09,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:03:09,648 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:03:09,649 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:03:09,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-21 20:03:10,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:03:11,129 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:03:11,130 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-21 20:03:11,140 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4734319ae/391518a0b1e54b3489dbf0cef79ce293/FLAG37074fd70 [2024-06-21 20:03:11,150 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4734319ae/391518a0b1e54b3489dbf0cef79ce293 [2024-06-21 20:03:11,154 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:03:11,154 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:03:11,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe005_tso.yml/witness.yml [2024-06-21 20:03:11,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:03:11,238 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:03:11,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:11,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:03:11,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:03:11,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:11" (1/2) ... [2024-06-21 20:03:11,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce00b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:11, skipping insertion in model container [2024-06-21 20:03:11,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:11" (1/2) ... [2024-06-21 20:03:11,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29552abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:11, skipping insertion in model container [2024-06-21 20:03:11,245 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:11" (2/2) ... [2024-06-21 20:03:11,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce00b87 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11, skipping insertion in model container [2024-06-21 20:03:11,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:11" (2/2) ... [2024-06-21 20:03:11,245 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:03:11,286 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:03:11,287 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:03:11,287 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:03:11,288 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:03:11,288 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:03:11,288 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 20:03:11,333 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:03:11,572 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:11,585 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:03:11,659 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:11,693 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:03:11,694 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11 WrapperNode [2024-06-21 20:03:11,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:11,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:11,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:03:11,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:03:11,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,711 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,727 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 20:03:11,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:11,728 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:03:11,728 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:03:11,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:03:11,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,738 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,748 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:03:11,748 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,754 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,758 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:03:11,758 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:03:11,759 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:03:11,759 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:03:11,760 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (1/1) ... [2024-06-21 20:03:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:11,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:03:11,783 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) [2024-06-21 20:03:11,786 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 [2024-06-21 20:03:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:03:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:03:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:03:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:03:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:03:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:03:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:03:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:03:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:03:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:03:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:03:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:03:11,816 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:03:11,942 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:03:11,944 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:03:12,143 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:03:12,144 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:03:12,203 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:03:12,207 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:03:12,208 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:12 BoogieIcfgContainer [2024-06-21 20:03:12,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:03:12,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:03:12,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:03:12,213 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:03:12,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:03:11" (1/4) ... [2024-06-21 20:03:12,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74050ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:03:12, skipping insertion in model container [2024-06-21 20:03:12,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:11" (2/4) ... [2024-06-21 20:03:12,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74050ffa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:03:12, skipping insertion in model container [2024-06-21 20:03:12,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:11" (3/4) ... [2024-06-21 20:03:12,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74050ffa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:03:12, skipping insertion in model container [2024-06-21 20:03:12,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:12" (4/4) ... [2024-06-21 20:03:12,218 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_tso.i [2024-06-21 20:03:12,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:03:12,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:03:12,234 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:03:12,265 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:03:12,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:03:12,318 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 20:03:12,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:12,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:03:12,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:03:12,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 20:03:12,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:03:12,359 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;@4911007a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:03:12,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:03:12,362 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:03:12,362 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:03:12,362 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:12,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:12,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:03:12,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:12,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:12,371 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-21 20:03:12,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:12,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472320283] [2024-06-21 20:03:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:12,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:12,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472320283] [2024-06-21 20:03:12,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472320283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:12,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:03:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991715319] [2024-06-21 20:03:12,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:12,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:03:12,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:12,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:03:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:03:12,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-21 20:03:12,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:12,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-21 20:03:12,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:13,116 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-21 20:03:13,117 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 20:03:13,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-21 20:03:13,130 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 20:03:13,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-21 20:03:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:03:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:03:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-21 20:03:13,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-21 20:03:13,143 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-21 20:03:13,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-21 20:03:13,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:13,150 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 20:03:13,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 20:03:13,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 20:03:13,154 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 20:03:13,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:13,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:13,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:03:13,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:13,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-21 20:03:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:13,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717968729] [2024-06-21 20:03:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717968729] [2024-06-21 20:03:13,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717968729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:03:13,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636866423] [2024-06-21 20:03:13,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:03:13,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:03:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:03:13,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:13,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:13,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:13,545 INFO L124 PetriNetUnfolderBase]: 724/1188 cut-off events. [2024-06-21 20:03:13,545 INFO L125 PetriNetUnfolderBase]: For 255/289 co-relation queries the response was YES. [2024-06-21 20:03:13,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 1188 events. 724/1188 cut-off events. For 255/289 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6052 event pairs, 401 based on Foata normal form. 3/1156 useless extension candidates. Maximal degree in co-relation 2706. Up to 1090 conditions per place. [2024-06-21 20:03:13,552 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 20:03:13,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 248 flow [2024-06-21 20:03:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-21 20:03:13,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-21 20:03:13,555 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 110 transitions. [2024-06-21 20:03:13,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 248 flow [2024-06-21 20:03:13,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:13,558 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-21 20:03:13,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-21 20:03:13,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-21 20:03:13,559 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-21 20:03:13,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:13,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:13,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:03:13,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:13,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:13,561 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-21 20:03:13,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:13,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660480156] [2024-06-21 20:03:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:13,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660480156] [2024-06-21 20:03:13,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660480156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:03:13,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42726490] [2024-06-21 20:03:13,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:03:13,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:03:13,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:03:13,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 20:03:13,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 20:03:13,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:13,900 INFO L124 PetriNetUnfolderBase]: 632/1065 cut-off events. [2024-06-21 20:03:13,901 INFO L125 PetriNetUnfolderBase]: For 588/681 co-relation queries the response was YES. [2024-06-21 20:03:13,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 1065 events. 632/1065 cut-off events. For 588/681 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5424 event pairs, 334 based on Foata normal form. 2/1024 useless extension candidates. Maximal degree in co-relation 2722. Up to 968 conditions per place. [2024-06-21 20:03:13,910 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2024-06-21 20:03:13,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 276 flow [2024-06-21 20:03:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 20:03:13,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-21 20:03:13,916 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 109 transitions. [2024-06-21 20:03:13,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 276 flow [2024-06-21 20:03:13,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 274 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:13,919 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 193 flow [2024-06-21 20:03:13,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-21 20:03:13,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 20:03:13,920 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 193 flow [2024-06-21 20:03:13,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:13,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:13,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:03:13,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:13,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-21 20:03:13,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:13,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691452711] [2024-06-21 20:03:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:13,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691452711] [2024-06-21 20:03:14,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691452711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369849824] [2024-06-21 20:03:14,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:14,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:14,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:14,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:14,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:14,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:14,344 INFO L124 PetriNetUnfolderBase]: 908/1468 cut-off events. [2024-06-21 20:03:14,344 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2024-06-21 20:03:14,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4142 conditions, 1468 events. 908/1468 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7260 event pairs, 290 based on Foata normal form. 6/1462 useless extension candidates. Maximal degree in co-relation 4124. Up to 1315 conditions per place. [2024-06-21 20:03:14,352 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-21 20:03:14,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 407 flow [2024-06-21 20:03:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:03:14,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:03:14,354 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 193 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:03:14,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 407 flow [2024-06-21 20:03:14,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:14,360 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 233 flow [2024-06-21 20:03:14,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 20:03:14,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-21 20:03:14,361 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 233 flow [2024-06-21 20:03:14,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:14,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:14,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:03:14,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:14,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-21 20:03:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:14,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795771482] [2024-06-21 20:03:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795771482] [2024-06-21 20:03:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795771482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:14,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614826341] [2024-06-21 20:03:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:14,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:14,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-21 20:03:14,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:14,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:14,639 INFO L124 PetriNetUnfolderBase]: 917/1512 cut-off events. [2024-06-21 20:03:14,640 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2024-06-21 20:03:14,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1512 events. 917/1512 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7655 event pairs, 320 based on Foata normal form. 4/1511 useless extension candidates. Maximal degree in co-relation 4561. Up to 1318 conditions per place. [2024-06-21 20:03:14,649 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2024-06-21 20:03:14,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 467 flow [2024-06-21 20:03:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 20:03:14,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:03:14,650 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 233 flow. Second operand 5 states and 130 transitions. [2024-06-21 20:03:14,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 467 flow [2024-06-21 20:03:14,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:14,658 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 306 flow [2024-06-21 20:03:14,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-21 20:03:14,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-21 20:03:14,660 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 306 flow [2024-06-21 20:03:14,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-21 20:03:14,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:14,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:14,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:03:14,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:14,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2000396091, now seen corresponding path program 1 times [2024-06-21 20:03:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:14,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229392752] [2024-06-21 20:03:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:14,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229392752] [2024-06-21 20:03:14,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229392752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:14,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738132289] [2024-06-21 20:03:14,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:14,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:14,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:14,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:14,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-21 20:03:14,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:14,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:14,984 INFO L124 PetriNetUnfolderBase]: 928/1533 cut-off events. [2024-06-21 20:03:14,984 INFO L125 PetriNetUnfolderBase]: For 3308/3311 co-relation queries the response was YES. [2024-06-21 20:03:14,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5231 conditions, 1533 events. 928/1533 cut-off events. For 3308/3311 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7767 event pairs, 341 based on Foata normal form. 2/1529 useless extension candidates. Maximal degree in co-relation 5209. Up to 1325 conditions per place. [2024-06-21 20:03:14,993 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-21 20:03:14,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 561 flow [2024-06-21 20:03:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:03:14,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-21 20:03:14,995 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 306 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:03:14,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 561 flow [2024-06-21 20:03:15,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 529 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:15,002 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 370 flow [2024-06-21 20:03:15,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-06-21 20:03:15,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 20:03:15,005 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 370 flow [2024-06-21 20:03:15,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-21 20:03:15,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:03:15,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:15,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2119657435, now seen corresponding path program 2 times [2024-06-21 20:03:15,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475373004] [2024-06-21 20:03:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475373004] [2024-06-21 20:03:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475373004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:15,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:15,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276980460] [2024-06-21 20:03:15,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:15,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:15,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-21 20:03:15,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:15,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:15,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,279 INFO L124 PetriNetUnfolderBase]: 915/1510 cut-off events. [2024-06-21 20:03:15,280 INFO L125 PetriNetUnfolderBase]: For 3810/3810 co-relation queries the response was YES. [2024-06-21 20:03:15,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5269 conditions, 1510 events. 915/1510 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7612 event pairs, 336 based on Foata normal form. 4/1509 useless extension candidates. Maximal degree in co-relation 5245. Up to 1312 conditions per place. [2024-06-21 20:03:15,289 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 51 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-21 20:03:15,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 546 flow [2024-06-21 20:03:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 20:03:15,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-21 20:03:15,291 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 370 flow. Second operand 5 states and 128 transitions. [2024-06-21 20:03:15,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 546 flow [2024-06-21 20:03:15,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 523 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:15,295 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 393 flow [2024-06-21 20:03:15,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-21 20:03:15,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-21 20:03:15,297 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 393 flow [2024-06-21 20:03:15,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-21 20:03:15,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:03:15,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:15,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1439162230, now seen corresponding path program 1 times [2024-06-21 20:03:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545941385] [2024-06-21 20:03:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:15,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:15,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545941385] [2024-06-21 20:03:15,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545941385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:15,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:15,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:15,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360618340] [2024-06-21 20:03:15,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:15,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:15,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:15,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:15,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 393 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:15,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:15,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:15,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,593 INFO L124 PetriNetUnfolderBase]: 924/1521 cut-off events. [2024-06-21 20:03:15,593 INFO L125 PetriNetUnfolderBase]: For 4814/4814 co-relation queries the response was YES. [2024-06-21 20:03:15,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 1521 events. 924/1521 cut-off events. For 4814/4814 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7614 event pairs, 306 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 5410. Up to 1291 conditions per place. [2024-06-21 20:03:15,602 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2024-06-21 20:03:15,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 617 flow [2024-06-21 20:03:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:15,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 20:03:15,604 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 393 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:15,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 617 flow [2024-06-21 20:03:15,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 588 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:15,611 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 442 flow [2024-06-21 20:03:15,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=442, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-21 20:03:15,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-21 20:03:15,612 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 442 flow [2024-06-21 20:03:15,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:15,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:03:15,613 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:15,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1769449510, now seen corresponding path program 1 times [2024-06-21 20:03:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492072118] [2024-06-21 20:03:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492072118] [2024-06-21 20:03:15,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492072118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:15,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:15,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:15,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621123711] [2024-06-21 20:03:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:15,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:15,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:15,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:15,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 442 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:15,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:15,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:15,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,907 INFO L124 PetriNetUnfolderBase]: 935/1546 cut-off events. [2024-06-21 20:03:15,908 INFO L125 PetriNetUnfolderBase]: For 5859/5859 co-relation queries the response was YES. [2024-06-21 20:03:15,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 1546 events. 935/1546 cut-off events. For 5859/5859 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7788 event pairs, 308 based on Foata normal form. 2/1546 useless extension candidates. Maximal degree in co-relation 5832. Up to 1378 conditions per place. [2024-06-21 20:03:15,917 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 72 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-06-21 20:03:15,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 696 flow [2024-06-21 20:03:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:03:15,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:03:15,919 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 442 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:03:15,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 696 flow [2024-06-21 20:03:15,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 642 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:15,926 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 448 flow [2024-06-21 20:03:15,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=448, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-21 20:03:15,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-21 20:03:15,927 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 448 flow [2024-06-21 20:03:15,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:15,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:03:15,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:15,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash -455521062, now seen corresponding path program 2 times [2024-06-21 20:03:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651431154] [2024-06-21 20:03:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651431154] [2024-06-21 20:03:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651431154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:16,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921972766] [2024-06-21 20:03:16,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:16,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:16,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:16,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:16,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 448 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:16,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:16,192 INFO L124 PetriNetUnfolderBase]: 962/1588 cut-off events. [2024-06-21 20:03:16,192 INFO L125 PetriNetUnfolderBase]: For 7275/7278 co-relation queries the response was YES. [2024-06-21 20:03:16,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6261 conditions, 1588 events. 962/1588 cut-off events. For 7275/7278 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8027 event pairs, 308 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 6233. Up to 1299 conditions per place. [2024-06-21 20:03:16,201 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 32 changer transitions 0/104 dead transitions. [2024-06-21 20:03:16,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 854 flow [2024-06-21 20:03:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 20:03:16,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-21 20:03:16,202 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 448 flow. Second operand 6 states and 161 transitions. [2024-06-21 20:03:16,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 854 flow [2024-06-21 20:03:16,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 818 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:16,210 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 570 flow [2024-06-21 20:03:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-21 20:03:16,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 20:03:16,211 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 570 flow [2024-06-21 20:03:16,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:16,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:03:16,212 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:16,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 705318268, now seen corresponding path program 3 times [2024-06-21 20:03:16,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142778130] [2024-06-21 20:03:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142778130] [2024-06-21 20:03:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142778130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264330419] [2024-06-21 20:03:16,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:16,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:16,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 570 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:16,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:16,492 INFO L124 PetriNetUnfolderBase]: 952/1570 cut-off events. [2024-06-21 20:03:16,493 INFO L125 PetriNetUnfolderBase]: For 9007/9007 co-relation queries the response was YES. [2024-06-21 20:03:16,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6628 conditions, 1570 events. 952/1570 cut-off events. For 9007/9007 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7951 event pairs, 306 based on Foata normal form. 4/1566 useless extension candidates. Maximal degree in co-relation 6599. Up to 1291 conditions per place. [2024-06-21 20:03:16,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 29 changer transitions 0/99 dead transitions. [2024-06-21 20:03:16,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 844 flow [2024-06-21 20:03:16,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:03:16,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 20:03:16,503 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 570 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:03:16,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 844 flow [2024-06-21 20:03:16,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 802 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:16,514 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 595 flow [2024-06-21 20:03:16,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=595, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-21 20:03:16,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-21 20:03:16,515 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 595 flow [2024-06-21 20:03:16,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:16,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:16,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:03:16,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:16,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1881521801, now seen corresponding path program 1 times [2024-06-21 20:03:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:16,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653667126] [2024-06-21 20:03:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:16,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653667126] [2024-06-21 20:03:16,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653667126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:16,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3665257] [2024-06-21 20:03:16,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:16,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:16,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:16,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 595 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:16,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:16,788 INFO L124 PetriNetUnfolderBase]: 963/1591 cut-off events. [2024-06-21 20:03:16,788 INFO L125 PetriNetUnfolderBase]: For 10330/10330 co-relation queries the response was YES. [2024-06-21 20:03:16,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 1591 events. 963/1591 cut-off events. For 10330/10330 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8109 event pairs, 307 based on Foata normal form. 2/1585 useless extension candidates. Maximal degree in co-relation 6856. Up to 1351 conditions per place. [2024-06-21 20:03:16,797 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 61 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-21 20:03:16,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 843 flow [2024-06-21 20:03:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 20:03:16,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-21 20:03:16,799 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 595 flow. Second operand 5 states and 131 transitions. [2024-06-21 20:03:16,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 843 flow [2024-06-21 20:03:16,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 768 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:16,810 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 629 flow [2024-06-21 20:03:16,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=629, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-06-21 20:03:16,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-21 20:03:16,811 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 629 flow [2024-06-21 20:03:16,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:16,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:03:16,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:16,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1129250393, now seen corresponding path program 2 times [2024-06-21 20:03:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:16,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685693173] [2024-06-21 20:03:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685693173] [2024-06-21 20:03:16,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685693173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:16,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295118800] [2024-06-21 20:03:16,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:16,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:16,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:16,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:16,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 629 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:16,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,077 INFO L124 PetriNetUnfolderBase]: 974/1612 cut-off events. [2024-06-21 20:03:17,078 INFO L125 PetriNetUnfolderBase]: For 11759/11759 co-relation queries the response was YES. [2024-06-21 20:03:17,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7076 conditions, 1612 events. 974/1612 cut-off events. For 11759/11759 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8246 event pairs, 307 based on Foata normal form. 2/1606 useless extension candidates. Maximal degree in co-relation 7044. Up to 1315 conditions per place. [2024-06-21 20:03:17,086 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 35 changer transitions 0/105 dead transitions. [2024-06-21 20:03:17,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 958 flow [2024-06-21 20:03:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:03:17,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:03:17,087 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 629 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:03:17,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 958 flow [2024-06-21 20:03:17,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 905 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:17,101 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 690 flow [2024-06-21 20:03:17,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=690, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-21 20:03:17,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 20:03:17,102 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 690 flow [2024-06-21 20:03:17,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:03:17,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:17,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1129457783, now seen corresponding path program 3 times [2024-06-21 20:03:17,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28037464] [2024-06-21 20:03:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:17,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:17,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28037464] [2024-06-21 20:03:17,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28037464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:17,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:17,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:17,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621851641] [2024-06-21 20:03:17,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:17,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:17,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 690 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:17,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:17,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,368 INFO L124 PetriNetUnfolderBase]: 969/1605 cut-off events. [2024-06-21 20:03:17,369 INFO L125 PetriNetUnfolderBase]: For 13320/13320 co-relation queries the response was YES. [2024-06-21 20:03:17,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7190 conditions, 1605 events. 969/1605 cut-off events. For 13320/13320 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8214 event pairs, 307 based on Foata normal form. 2/1599 useless extension candidates. Maximal degree in co-relation 7157. Up to 1310 conditions per place. [2024-06-21 20:03:17,376 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 38 changer transitions 0/103 dead transitions. [2024-06-21 20:03:17,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 928 flow [2024-06-21 20:03:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:03:17,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:03:17,378 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 690 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:03:17,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 928 flow [2024-06-21 20:03:17,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 836 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:17,392 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 682 flow [2024-06-21 20:03:17,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-21 20:03:17,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-21 20:03:17,393 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 682 flow [2024-06-21 20:03:17,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:03:17,394 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:17,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash 713496952, now seen corresponding path program 1 times [2024-06-21 20:03:17,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317420594] [2024-06-21 20:03:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:17,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:17,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317420594] [2024-06-21 20:03:17,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317420594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:17,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:17,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22043752] [2024-06-21 20:03:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:17,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:17,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 682 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:17,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,642 INFO L124 PetriNetUnfolderBase]: 911/1565 cut-off events. [2024-06-21 20:03:17,643 INFO L125 PetriNetUnfolderBase]: For 14592/14592 co-relation queries the response was YES. [2024-06-21 20:03:17,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7054 conditions, 1565 events. 911/1565 cut-off events. For 14592/14592 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8195 event pairs, 293 based on Foata normal form. 2/1565 useless extension candidates. Maximal degree in co-relation 7020. Up to 1310 conditions per place. [2024-06-21 20:03:17,651 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 78 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-06-21 20:03:17,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 109 transitions, 992 flow [2024-06-21 20:03:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 20:03:17,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:03:17,653 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 682 flow. Second operand 5 states and 130 transitions. [2024-06-21 20:03:17,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 109 transitions, 992 flow [2024-06-21 20:03:17,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 861 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:17,667 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 660 flow [2024-06-21 20:03:17,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=660, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-06-21 20:03:17,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-21 20:03:17,668 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 660 flow [2024-06-21 20:03:17,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:03:17,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:17,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash 55122551, now seen corresponding path program 1 times [2024-06-21 20:03:17,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759785962] [2024-06-21 20:03:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:17,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759785962] [2024-06-21 20:03:17,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759785962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:17,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:17,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513845902] [2024-06-21 20:03:17,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:17,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:17,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:17,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:17,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:17,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:17,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,977 INFO L124 PetriNetUnfolderBase]: 996/1660 cut-off events. [2024-06-21 20:03:17,978 INFO L125 PetriNetUnfolderBase]: For 16311/16311 co-relation queries the response was YES. [2024-06-21 20:03:17,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7617 conditions, 1660 events. 996/1660 cut-off events. For 16311/16311 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8525 event pairs, 304 based on Foata normal form. 4/1659 useless extension candidates. Maximal degree in co-relation 7582. Up to 1416 conditions per place. [2024-06-21 20:03:17,987 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 87 selfloop transitions, 20 changer transitions 0/115 dead transitions. [2024-06-21 20:03:17,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 942 flow [2024-06-21 20:03:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:03:17,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:03:17,988 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 660 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:03:17,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 942 flow [2024-06-21 20:03:18,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 115 transitions, 926 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:18,004 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 713 flow [2024-06-21 20:03:18,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=713, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2024-06-21 20:03:18,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-21 20:03:18,005 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 713 flow [2024-06-21 20:03:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:18,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:18,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:03:18,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:18,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1226086619, now seen corresponding path program 2 times [2024-06-21 20:03:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877897595] [2024-06-21 20:03:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:18,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:18,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877897595] [2024-06-21 20:03:18,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877897595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:18,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:18,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:18,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648435822] [2024-06-21 20:03:18,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:18,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:18,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:18,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:18,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 713 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:18,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:18,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:18,319 INFO L124 PetriNetUnfolderBase]: 988/1653 cut-off events. [2024-06-21 20:03:18,319 INFO L125 PetriNetUnfolderBase]: For 18074/18074 co-relation queries the response was YES. [2024-06-21 20:03:18,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7837 conditions, 1653 events. 988/1653 cut-off events. For 18074/18074 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8521 event pairs, 273 based on Foata normal form. 4/1652 useless extension candidates. Maximal degree in co-relation 7799. Up to 1345 conditions per place. [2024-06-21 20:03:18,329 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-21 20:03:18,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 1007 flow [2024-06-21 20:03:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:03:18,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:03:18,330 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 713 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:03:18,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 1007 flow [2024-06-21 20:03:18,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 956 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:18,346 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 739 flow [2024-06-21 20:03:18,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=739, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-21 20:03:18,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 20:03:18,347 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 739 flow [2024-06-21 20:03:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:18,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:03:18,348 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:18,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash -270590088, now seen corresponding path program 2 times [2024-06-21 20:03:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:18,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628919138] [2024-06-21 20:03:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:18,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:18,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628919138] [2024-06-21 20:03:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628919138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:18,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:18,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639170791] [2024-06-21 20:03:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:18,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:18,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:18,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 739 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:18,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:18,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:18,671 INFO L124 PetriNetUnfolderBase]: 914/1585 cut-off events. [2024-06-21 20:03:18,672 INFO L125 PetriNetUnfolderBase]: For 19238/19238 co-relation queries the response was YES. [2024-06-21 20:03:18,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7625 conditions, 1585 events. 914/1585 cut-off events. For 19238/19238 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8384 event pairs, 296 based on Foata normal form. 4/1587 useless extension candidates. Maximal degree in co-relation 7586. Up to 1321 conditions per place. [2024-06-21 20:03:18,680 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 79 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-06-21 20:03:18,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 114 transitions, 997 flow [2024-06-21 20:03:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 20:03:18,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-21 20:03:18,682 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 739 flow. Second operand 4 states and 111 transitions. [2024-06-21 20:03:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 114 transitions, 997 flow [2024-06-21 20:03:18,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 114 transitions, 932 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:18,701 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 760 flow [2024-06-21 20:03:18,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=760, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-21 20:03:18,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 20:03:18,701 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 760 flow [2024-06-21 20:03:18,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:18,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:18,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:03:18,702 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:18,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash 47155577, now seen corresponding path program 1 times [2024-06-21 20:03:18,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:18,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31356688] [2024-06-21 20:03:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:18,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:18,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31356688] [2024-06-21 20:03:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31356688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:18,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:18,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:18,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615505175] [2024-06-21 20:03:18,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:18,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:18,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:18,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:18,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:18,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 760 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:18,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:18,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:19,083 INFO L124 PetriNetUnfolderBase]: 1034/1727 cut-off events. [2024-06-21 20:03:19,083 INFO L125 PetriNetUnfolderBase]: For 22305/22305 co-relation queries the response was YES. [2024-06-21 20:03:19,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8649 conditions, 1727 events. 1034/1727 cut-off events. For 22305/22305 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8942 event pairs, 180 based on Foata normal form. 4/1729 useless extension candidates. Maximal degree in co-relation 8609. Up to 1452 conditions per place. [2024-06-21 20:03:19,093 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 19 changer transitions 0/141 dead transitions. [2024-06-21 20:03:19,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1238 flow [2024-06-21 20:03:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:03:19,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 20:03:19,095 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 760 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:03:19,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1238 flow [2024-06-21 20:03:19,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 141 transitions, 1204 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:19,119 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 827 flow [2024-06-21 20:03:19,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-21 20:03:19,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 20:03:19,119 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 827 flow [2024-06-21 20:03:19,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:19,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:19,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:03:19,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:19,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 160240411, now seen corresponding path program 2 times [2024-06-21 20:03:19,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:19,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017088152] [2024-06-21 20:03:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:19,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:19,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017088152] [2024-06-21 20:03:19,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017088152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:19,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:19,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662311103] [2024-06-21 20:03:19,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:19,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:19,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:19,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 827 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:19,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:19,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:19,552 INFO L124 PetriNetUnfolderBase]: 1026/1715 cut-off events. [2024-06-21 20:03:19,553 INFO L125 PetriNetUnfolderBase]: For 24167/24167 co-relation queries the response was YES. [2024-06-21 20:03:19,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8782 conditions, 1715 events. 1026/1715 cut-off events. For 24167/24167 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8864 event pairs, 264 based on Foata normal form. 4/1717 useless extension candidates. Maximal degree in co-relation 8741. Up to 1499 conditions per place. [2024-06-21 20:03:19,563 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2024-06-21 20:03:19,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1155 flow [2024-06-21 20:03:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:19,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:03:19,564 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 827 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:19,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1155 flow [2024-06-21 20:03:19,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 134 transitions, 1097 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:19,595 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 806 flow [2024-06-21 20:03:19,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=806, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-21 20:03:19,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-21 20:03:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 806 flow [2024-06-21 20:03:19,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:19,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:19,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:03:19,597 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:19,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash 858263589, now seen corresponding path program 3 times [2024-06-21 20:03:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:19,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187037413] [2024-06-21 20:03:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:19,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:19,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187037413] [2024-06-21 20:03:19,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187037413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:19,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:19,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:19,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178905471] [2024-06-21 20:03:19,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:19,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:19,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:19,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:19,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 806 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:19,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:19,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:19,947 INFO L124 PetriNetUnfolderBase]: 1043/1733 cut-off events. [2024-06-21 20:03:19,947 INFO L125 PetriNetUnfolderBase]: For 26874/26877 co-relation queries the response was YES. [2024-06-21 20:03:19,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8961 conditions, 1733 events. 1043/1733 cut-off events. For 26874/26877 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8931 event pairs, 288 based on Foata normal form. 4/1727 useless extension candidates. Maximal degree in co-relation 8918. Up to 1408 conditions per place. [2024-06-21 20:03:19,956 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 40 changer transitions 0/133 dead transitions. [2024-06-21 20:03:19,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1154 flow [2024-06-21 20:03:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:03:19,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 20:03:19,957 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 806 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:03:19,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1154 flow [2024-06-21 20:03:19,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 133 transitions, 1119 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:19,984 INFO L231 Difference]: Finished difference. Result has 100 places, 106 transitions, 892 flow [2024-06-21 20:03:19,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2024-06-21 20:03:19,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 20:03:19,985 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 892 flow [2024-06-21 20:03:19,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:19,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:19,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:03:19,985 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:19,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:19,986 INFO L85 PathProgramCache]: Analyzing trace with hash 190543555, now seen corresponding path program 1 times [2024-06-21 20:03:19,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:19,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556922915] [2024-06-21 20:03:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:20,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:20,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556922915] [2024-06-21 20:03:20,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556922915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:20,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:20,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085718099] [2024-06-21 20:03:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:20,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:20,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:20,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 892 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:20,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:20,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:20,290 INFO L124 PetriNetUnfolderBase]: 970/1673 cut-off events. [2024-06-21 20:03:20,290 INFO L125 PetriNetUnfolderBase]: For 28891/28900 co-relation queries the response was YES. [2024-06-21 20:03:20,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8941 conditions, 1673 events. 970/1673 cut-off events. For 28891/28900 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8896 event pairs, 265 based on Foata normal form. 4/1675 useless extension candidates. Maximal degree in co-relation 8897. Up to 1392 conditions per place. [2024-06-21 20:03:20,301 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-21 20:03:20,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 129 transitions, 1266 flow [2024-06-21 20:03:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:03:20,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:03:20,304 INFO L175 Difference]: Start difference. First operand has 100 places, 106 transitions, 892 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:03:20,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 129 transitions, 1266 flow [2024-06-21 20:03:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 129 transitions, 1163 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:20,334 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 919 flow [2024-06-21 20:03:20,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=919, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-21 20:03:20,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-21 20:03:20,335 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 919 flow [2024-06-21 20:03:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:20,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:03:20,336 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:20,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2063316041, now seen corresponding path program 4 times [2024-06-21 20:03:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:20,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425565312] [2024-06-21 20:03:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:20,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425565312] [2024-06-21 20:03:20,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425565312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:20,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:20,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:20,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182116524] [2024-06-21 20:03:20,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:20,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:20,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:20,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:20,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:20,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:20,703 INFO L124 PetriNetUnfolderBase]: 1103/1836 cut-off events. [2024-06-21 20:03:20,703 INFO L125 PetriNetUnfolderBase]: For 35538/35538 co-relation queries the response was YES. [2024-06-21 20:03:20,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 1836 events. 1103/1836 cut-off events. For 35538/35538 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9668 event pairs, 287 based on Foata normal form. 20/1848 useless extension candidates. Maximal degree in co-relation 9736. Up to 1416 conditions per place. [2024-06-21 20:03:20,713 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-06-21 20:03:20,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 141 transitions, 1301 flow [2024-06-21 20:03:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:20,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:03:20,714 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 919 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:20,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 141 transitions, 1301 flow [2024-06-21 20:03:20,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1262 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:20,746 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 1000 flow [2024-06-21 20:03:20,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1000, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2024-06-21 20:03:20,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-21 20:03:20,746 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 1000 flow [2024-06-21 20:03:20,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:20,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:20,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:03:20,747 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:20,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash 574328515, now seen corresponding path program 2 times [2024-06-21 20:03:20,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:20,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039507472] [2024-06-21 20:03:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:20,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:20,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:20,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039507472] [2024-06-21 20:03:20,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039507472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:20,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:20,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:20,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293709658] [2024-06-21 20:03:20,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:20,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:20,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:20,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 1000 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:20,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:20,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:21,016 INFO L124 PetriNetUnfolderBase]: 1014/1751 cut-off events. [2024-06-21 20:03:21,017 INFO L125 PetriNetUnfolderBase]: For 33875/33884 co-relation queries the response was YES. [2024-06-21 20:03:21,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9612 conditions, 1751 events. 1014/1751 cut-off events. For 33875/33884 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9485 event pairs, 272 based on Foata normal form. 11/1760 useless extension candidates. Maximal degree in co-relation 9565. Up to 1485 conditions per place. [2024-06-21 20:03:21,027 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 91 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2024-06-21 20:03:21,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 1264 flow [2024-06-21 20:03:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 20:03:21,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-21 20:03:21,028 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 1000 flow. Second operand 5 states and 131 transitions. [2024-06-21 20:03:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 1264 flow [2024-06-21 20:03:21,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 129 transitions, 1164 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:21,067 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 950 flow [2024-06-21 20:03:21,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=950, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2024-06-21 20:03:21,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-21 20:03:21,067 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 950 flow [2024-06-21 20:03:21,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:21,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:21,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:03:21,068 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:21,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash 397292103, now seen corresponding path program 1 times [2024-06-21 20:03:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384410890] [2024-06-21 20:03:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:21,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:21,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384410890] [2024-06-21 20:03:21,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384410890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:21,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:21,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953291376] [2024-06-21 20:03:21,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:21,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:21,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:21,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:21,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 950 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:21,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:21,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:21,341 INFO L124 PetriNetUnfolderBase]: 1115/1872 cut-off events. [2024-06-21 20:03:21,341 INFO L125 PetriNetUnfolderBase]: For 36319/36319 co-relation queries the response was YES. [2024-06-21 20:03:21,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10028 conditions, 1872 events. 1115/1872 cut-off events. For 36319/36319 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9961 event pairs, 277 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 9980. Up to 1576 conditions per place. [2024-06-21 20:03:21,350 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 34 changer transitions 0/151 dead transitions. [2024-06-21 20:03:21,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 151 transitions, 1528 flow [2024-06-21 20:03:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:03:21,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:03:21,351 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 950 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:03:21,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 151 transitions, 1528 flow [2024-06-21 20:03:21,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 1452 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:21,374 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1145 flow [2024-06-21 20:03:21,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1145, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-21 20:03:21,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 20:03:21,375 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1145 flow [2024-06-21 20:03:21,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:21,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:21,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:03:21,376 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:21,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1251394355, now seen corresponding path program 2 times [2024-06-21 20:03:21,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:21,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719182620] [2024-06-21 20:03:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:21,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:21,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719182620] [2024-06-21 20:03:21,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719182620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:21,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:21,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:21,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342962385] [2024-06-21 20:03:21,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:21,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:21,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:21,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:21,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:21,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:21,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1145 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:21,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:21,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:21,670 INFO L124 PetriNetUnfolderBase]: 1181/1989 cut-off events. [2024-06-21 20:03:21,671 INFO L125 PetriNetUnfolderBase]: For 41492/41492 co-relation queries the response was YES. [2024-06-21 20:03:21,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11194 conditions, 1989 events. 1181/1989 cut-off events. For 41492/41492 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10739 event pairs, 271 based on Foata normal form. 4/1991 useless extension candidates. Maximal degree in co-relation 11143. Up to 1733 conditions per place. [2024-06-21 20:03:21,684 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 126 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-21 20:03:21,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 169 transitions, 1771 flow [2024-06-21 20:03:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:03:21,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:03:21,685 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1145 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:03:21,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 169 transitions, 1771 flow [2024-06-21 20:03:21,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1719 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:21,725 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1422 flow [2024-06-21 20:03:21,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1422, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-06-21 20:03:21,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 20:03:21,726 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1422 flow [2024-06-21 20:03:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:21,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:21,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:03:21,727 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:21,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash 208423943, now seen corresponding path program 3 times [2024-06-21 20:03:21,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:21,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125083862] [2024-06-21 20:03:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:21,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125083862] [2024-06-21 20:03:21,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125083862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:21,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:21,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728653869] [2024-06-21 20:03:21,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:21,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:21,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1422 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:21,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:21,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:22,052 INFO L124 PetriNetUnfolderBase]: 1229/2070 cut-off events. [2024-06-21 20:03:22,053 INFO L125 PetriNetUnfolderBase]: For 46719/46719 co-relation queries the response was YES. [2024-06-21 20:03:22,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12219 conditions, 2070 events. 1229/2070 cut-off events. For 46719/46719 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11265 event pairs, 271 based on Foata normal form. 4/2072 useless extension candidates. Maximal degree in co-relation 12164. Up to 1695 conditions per place. [2024-06-21 20:03:22,067 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-21 20:03:22,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 199 transitions, 2152 flow [2024-06-21 20:03:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:03:22,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 20:03:22,069 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1422 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:03:22,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 199 transitions, 2152 flow [2024-06-21 20:03:22,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 199 transitions, 2057 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:22,120 INFO L231 Difference]: Finished difference. Result has 125 places, 171 transitions, 1797 flow [2024-06-21 20:03:22,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1797, PETRI_PLACES=125, PETRI_TRANSITIONS=171} [2024-06-21 20:03:22,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 20:03:22,121 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 171 transitions, 1797 flow [2024-06-21 20:03:22,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:22,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:22,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:03:22,122 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:22,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-21 20:03:22,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:22,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51561971] [2024-06-21 20:03:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:22,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:22,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51561971] [2024-06-21 20:03:22,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51561971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:22,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:22,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:22,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356995694] [2024-06-21 20:03:22,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:22,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:22,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:22,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 171 transitions, 1797 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:22,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:22,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:22,436 INFO L124 PetriNetUnfolderBase]: 1162/2003 cut-off events. [2024-06-21 20:03:22,437 INFO L125 PetriNetUnfolderBase]: For 50019/50019 co-relation queries the response was YES. [2024-06-21 20:03:22,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12510 conditions, 2003 events. 1162/2003 cut-off events. For 50019/50019 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11058 event pairs, 270 based on Foata normal form. 2/2003 useless extension candidates. Maximal degree in co-relation 12451. Up to 1647 conditions per place. [2024-06-21 20:03:22,449 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 142 selfloop transitions, 10 changer transitions 0/182 dead transitions. [2024-06-21 20:03:22,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 182 transitions, 2153 flow [2024-06-21 20:03:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 20:03:22,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 20:03:22,450 INFO L175 Difference]: Start difference. First operand has 125 places, 171 transitions, 1797 flow. Second operand 4 states and 103 transitions. [2024-06-21 20:03:22,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 182 transitions, 2153 flow [2024-06-21 20:03:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 182 transitions, 2060 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:22,508 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 1763 flow [2024-06-21 20:03:22,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1763, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2024-06-21 20:03:22,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 20:03:22,511 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 1763 flow [2024-06-21 20:03:22,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:22,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:22,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:03:22,512 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:22,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash 628897646, now seen corresponding path program 1 times [2024-06-21 20:03:22,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:22,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738073244] [2024-06-21 20:03:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:22,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:22,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:22,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738073244] [2024-06-21 20:03:22,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738073244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:22,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:22,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223824275] [2024-06-21 20:03:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:22,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:22,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 1763 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:22,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:22,979 INFO L124 PetriNetUnfolderBase]: 1351/2278 cut-off events. [2024-06-21 20:03:22,979 INFO L125 PetriNetUnfolderBase]: For 59170/59170 co-relation queries the response was YES. [2024-06-21 20:03:22,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14011 conditions, 2278 events. 1351/2278 cut-off events. For 59170/59170 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12783 event pairs, 191 based on Foata normal form. 12/2282 useless extension candidates. Maximal degree in co-relation 13950. Up to 1603 conditions per place. [2024-06-21 20:03:22,994 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 165 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-21 20:03:22,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 208 transitions, 2407 flow [2024-06-21 20:03:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:03:22,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:03:22,995 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 1763 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:03:22,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 208 transitions, 2407 flow [2024-06-21 20:03:23,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 208 transitions, 2366 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:23,054 INFO L231 Difference]: Finished difference. Result has 132 places, 175 transitions, 1844 flow [2024-06-21 20:03:23,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1844, PETRI_PLACES=132, PETRI_TRANSITIONS=175} [2024-06-21 20:03:23,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 20:03:23,056 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 175 transitions, 1844 flow [2024-06-21 20:03:23,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:23,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:23,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:23,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:03:23,057 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:23,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:23,057 INFO L85 PathProgramCache]: Analyzing trace with hash 822938266, now seen corresponding path program 2 times [2024-06-21 20:03:23,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:23,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880502365] [2024-06-21 20:03:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:23,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:23,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:23,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880502365] [2024-06-21 20:03:23,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880502365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:23,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:23,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:23,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421495940] [2024-06-21 20:03:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:23,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:23,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:23,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:23,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 175 transitions, 1844 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:23,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:23,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:23,539 INFO L124 PetriNetUnfolderBase]: 1392/2359 cut-off events. [2024-06-21 20:03:23,539 INFO L125 PetriNetUnfolderBase]: For 63111/63111 co-relation queries the response was YES. [2024-06-21 20:03:23,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14646 conditions, 2359 events. 1392/2359 cut-off events. For 63111/63111 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13438 event pairs, 258 based on Foata normal form. 12/2363 useless extension candidates. Maximal degree in co-relation 14584. Up to 1737 conditions per place. [2024-06-21 20:03:23,556 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 32 changer transitions 0/204 dead transitions. [2024-06-21 20:03:23,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 204 transitions, 2452 flow [2024-06-21 20:03:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:03:23,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 20:03:23,558 INFO L175 Difference]: Start difference. First operand has 132 places, 175 transitions, 1844 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:03:23,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 204 transitions, 2452 flow [2024-06-21 20:03:23,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 204 transitions, 2408 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:23,630 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1894 flow [2024-06-21 20:03:23,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1894, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-21 20:03:23,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 20:03:23,631 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1894 flow [2024-06-21 20:03:23,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:23,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:23,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:23,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:03:23,632 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:23,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 823086136, now seen corresponding path program 3 times [2024-06-21 20:03:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276162246] [2024-06-21 20:03:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276162246] [2024-06-21 20:03:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276162246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:23,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:23,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578950116] [2024-06-21 20:03:23,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:23,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:23,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1894 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:23,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:23,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:23,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:24,053 INFO L124 PetriNetUnfolderBase]: 1364/2320 cut-off events. [2024-06-21 20:03:24,053 INFO L125 PetriNetUnfolderBase]: For 63525/63525 co-relation queries the response was YES. [2024-06-21 20:03:24,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14233 conditions, 2320 events. 1364/2320 cut-off events. For 63525/63525 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13188 event pairs, 252 based on Foata normal form. 16/2328 useless extension candidates. Maximal degree in co-relation 14169. Up to 1857 conditions per place. [2024-06-21 20:03:24,070 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 160 selfloop transitions, 31 changer transitions 0/199 dead transitions. [2024-06-21 20:03:24,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 199 transitions, 2352 flow [2024-06-21 20:03:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:03:24,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 20:03:24,071 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1894 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:03:24,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 199 transitions, 2352 flow [2024-06-21 20:03:24,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 2265 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:24,141 INFO L231 Difference]: Finished difference. Result has 137 places, 176 transitions, 1880 flow [2024-06-21 20:03:24,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1880, PETRI_PLACES=137, PETRI_TRANSITIONS=176} [2024-06-21 20:03:24,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 20:03:24,142 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 176 transitions, 1880 flow [2024-06-21 20:03:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:24,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:03:24,142 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1217777194, now seen corresponding path program 4 times [2024-06-21 20:03:24,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669605467] [2024-06-21 20:03:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669605467] [2024-06-21 20:03:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669605467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:24,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336099249] [2024-06-21 20:03:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:24,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:24,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 176 transitions, 1880 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:24,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:24,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:24,576 INFO L124 PetriNetUnfolderBase]: 1422/2403 cut-off events. [2024-06-21 20:03:24,576 INFO L125 PetriNetUnfolderBase]: For 67464/67464 co-relation queries the response was YES. [2024-06-21 20:03:24,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14704 conditions, 2403 events. 1422/2403 cut-off events. For 67464/67464 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13700 event pairs, 319 based on Foata normal form. 16/2411 useless extension candidates. Maximal degree in co-relation 14639. Up to 1941 conditions per place. [2024-06-21 20:03:24,593 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 39 changer transitions 0/204 dead transitions. [2024-06-21 20:03:24,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 204 transitions, 2382 flow [2024-06-21 20:03:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:03:24,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:03:24,595 INFO L175 Difference]: Start difference. First operand has 137 places, 176 transitions, 1880 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:03:24,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 204 transitions, 2382 flow [2024-06-21 20:03:24,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 204 transitions, 2307 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:24,661 INFO L231 Difference]: Finished difference. Result has 139 places, 177 transitions, 1916 flow [2024-06-21 20:03:24,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1916, PETRI_PLACES=139, PETRI_TRANSITIONS=177} [2024-06-21 20:03:24,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-21 20:03:24,662 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 177 transitions, 1916 flow [2024-06-21 20:03:24,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:24,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:03:24,663 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1417078984, now seen corresponding path program 5 times [2024-06-21 20:03:24,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659570243] [2024-06-21 20:03:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:24,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:24,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659570243] [2024-06-21 20:03:24,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659570243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:24,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:24,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:24,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935331086] [2024-06-21 20:03:24,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:24,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:24,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:24,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:24,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:24,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 177 transitions, 1916 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:24,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:24,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,124 INFO L124 PetriNetUnfolderBase]: 1480/2521 cut-off events. [2024-06-21 20:03:25,124 INFO L125 PetriNetUnfolderBase]: For 72479/72479 co-relation queries the response was YES. [2024-06-21 20:03:25,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15342 conditions, 2521 events. 1480/2521 cut-off events. For 72479/72479 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14627 event pairs, 339 based on Foata normal form. 16/2529 useless extension candidates. Maximal degree in co-relation 15276. Up to 2039 conditions per place. [2024-06-21 20:03:25,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 161 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2024-06-21 20:03:25,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 205 transitions, 2422 flow [2024-06-21 20:03:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:25,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:03:25,141 INFO L175 Difference]: Start difference. First operand has 139 places, 177 transitions, 1916 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:25,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 205 transitions, 2422 flow [2024-06-21 20:03:25,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 205 transitions, 2331 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:25,215 INFO L231 Difference]: Finished difference. Result has 141 places, 178 transitions, 1932 flow [2024-06-21 20:03:25,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=141, PETRI_TRANSITIONS=178} [2024-06-21 20:03:25,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-21 20:03:25,216 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 178 transitions, 1932 flow [2024-06-21 20:03:25,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:25,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:25,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:03:25,216 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:25,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1417226854, now seen corresponding path program 6 times [2024-06-21 20:03:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:25,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915541709] [2024-06-21 20:03:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:25,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:25,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:25,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915541709] [2024-06-21 20:03:25,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915541709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:25,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:25,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65617050] [2024-06-21 20:03:25,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:25,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:25,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:25,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:25,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 178 transitions, 1932 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:25,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:25,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,647 INFO L124 PetriNetUnfolderBase]: 1496/2553 cut-off events. [2024-06-21 20:03:25,647 INFO L125 PetriNetUnfolderBase]: For 72846/72846 co-relation queries the response was YES. [2024-06-21 20:03:25,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15389 conditions, 2553 events. 1496/2553 cut-off events. For 72846/72846 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14909 event pairs, 332 based on Foata normal form. 12/2557 useless extension candidates. Maximal degree in co-relation 15322. Up to 1772 conditions per place. [2024-06-21 20:03:25,672 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 161 selfloop transitions, 40 changer transitions 0/209 dead transitions. [2024-06-21 20:03:25,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 209 transitions, 2462 flow [2024-06-21 20:03:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:25,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:03:25,673 INFO L175 Difference]: Start difference. First operand has 141 places, 178 transitions, 1932 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:25,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 209 transitions, 2462 flow [2024-06-21 20:03:25,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 209 transitions, 2375 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:25,784 INFO L231 Difference]: Finished difference. Result has 143 places, 179 transitions, 1962 flow [2024-06-21 20:03:25,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1962, PETRI_PLACES=143, PETRI_TRANSITIONS=179} [2024-06-21 20:03:25,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 20:03:25,785 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 179 transitions, 1962 flow [2024-06-21 20:03:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:25,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:25,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:03:25,785 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:25,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:25,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1210152682, now seen corresponding path program 1 times [2024-06-21 20:03:25,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:25,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554995762] [2024-06-21 20:03:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:25,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554995762] [2024-06-21 20:03:25,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554995762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:25,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:25,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:25,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205895406] [2024-06-21 20:03:25,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:25,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:25,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:25,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 179 transitions, 1962 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:25,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:25,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,250 INFO L124 PetriNetUnfolderBase]: 1537/2634 cut-off events. [2024-06-21 20:03:26,251 INFO L125 PetriNetUnfolderBase]: For 77285/77285 co-relation queries the response was YES. [2024-06-21 20:03:26,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15850 conditions, 2634 events. 1537/2634 cut-off events. For 77285/77285 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15603 event pairs, 306 based on Foata normal form. 12/2638 useless extension candidates. Maximal degree in co-relation 15782. Up to 1853 conditions per place. [2024-06-21 20:03:26,270 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 44 changer transitions 0/210 dead transitions. [2024-06-21 20:03:26,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 210 transitions, 2500 flow [2024-06-21 20:03:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:03:26,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 20:03:26,272 INFO L175 Difference]: Start difference. First operand has 143 places, 179 transitions, 1962 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:03:26,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 210 transitions, 2500 flow [2024-06-21 20:03:26,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 210 transitions, 2401 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:26,358 INFO L231 Difference]: Finished difference. Result has 145 places, 180 transitions, 1989 flow [2024-06-21 20:03:26,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1989, PETRI_PLACES=145, PETRI_TRANSITIONS=180} [2024-06-21 20:03:26,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 20:03:26,359 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 180 transitions, 1989 flow [2024-06-21 20:03:26,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:03:26,359 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1444518573, now seen corresponding path program 1 times [2024-06-21 20:03:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466347949] [2024-06-21 20:03:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466347949] [2024-06-21 20:03:26,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466347949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297415309] [2024-06-21 20:03:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:26,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:26,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 180 transitions, 1989 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:26,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,779 INFO L124 PetriNetUnfolderBase]: 1558/2669 cut-off events. [2024-06-21 20:03:26,780 INFO L125 PetriNetUnfolderBase]: For 77103/77106 co-relation queries the response was YES. [2024-06-21 20:03:26,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16196 conditions, 2669 events. 1558/2669 cut-off events. For 77103/77106 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15794 event pairs, 368 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 16127. Up to 2261 conditions per place. [2024-06-21 20:03:26,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 61 changer transitions 0/214 dead transitions. [2024-06-21 20:03:26,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 214 transitions, 2816 flow [2024-06-21 20:03:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:03:26,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:03:26,799 INFO L175 Difference]: Start difference. First operand has 145 places, 180 transitions, 1989 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:03:26,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 214 transitions, 2816 flow [2024-06-21 20:03:26,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 214 transitions, 2706 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:26,885 INFO L231 Difference]: Finished difference. Result has 147 places, 192 transitions, 2202 flow [2024-06-21 20:03:26,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2202, PETRI_PLACES=147, PETRI_TRANSITIONS=192} [2024-06-21 20:03:26,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 20:03:26,886 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 192 transitions, 2202 flow [2024-06-21 20:03:26,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:03:26,887 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash -40452925, now seen corresponding path program 2 times [2024-06-21 20:03:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860535213] [2024-06-21 20:03:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860535213] [2024-06-21 20:03:26,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860535213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15483177] [2024-06-21 20:03:26,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:26,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:26,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:26,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 192 transitions, 2202 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:26,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:27,312 INFO L124 PetriNetUnfolderBase]: 1563/2674 cut-off events. [2024-06-21 20:03:27,312 INFO L125 PetriNetUnfolderBase]: For 79710/79713 co-relation queries the response was YES. [2024-06-21 20:03:27,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16303 conditions, 2674 events. 1563/2674 cut-off events. For 79710/79713 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15756 event pairs, 368 based on Foata normal form. 1/2668 useless extension candidates. Maximal degree in co-relation 16232. Up to 2268 conditions per place. [2024-06-21 20:03:27,328 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 142 selfloop transitions, 64 changer transitions 0/214 dead transitions. [2024-06-21 20:03:27,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 214 transitions, 2909 flow [2024-06-21 20:03:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:03:27,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:03:27,329 INFO L175 Difference]: Start difference. First operand has 147 places, 192 transitions, 2202 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:03:27,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 214 transitions, 2909 flow [2024-06-21 20:03:27,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 214 transitions, 2830 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:27,443 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2296 flow [2024-06-21 20:03:27,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2296, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-21 20:03:27,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 20:03:27,444 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2296 flow [2024-06-21 20:03:27,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:27,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:27,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:03:27,445 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:27,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1246932014, now seen corresponding path program 2 times [2024-06-21 20:03:27,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:27,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165098907] [2024-06-21 20:03:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:27,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:27,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:27,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165098907] [2024-06-21 20:03:27,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165098907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:27,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853791119] [2024-06-21 20:03:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:27,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:27,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 2296 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:27,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:27,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:27,961 INFO L124 PetriNetUnfolderBase]: 1604/2744 cut-off events. [2024-06-21 20:03:27,961 INFO L125 PetriNetUnfolderBase]: For 90912/90912 co-relation queries the response was YES. [2024-06-21 20:03:27,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16835 conditions, 2744 events. 1604/2744 cut-off events. For 90912/90912 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16374 event pairs, 360 based on Foata normal form. 12/2748 useless extension candidates. Maximal degree in co-relation 16762. Up to 2144 conditions per place. [2024-06-21 20:03:27,980 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-21 20:03:27,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 226 transitions, 2868 flow [2024-06-21 20:03:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:03:27,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 20:03:27,982 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2296 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:03:27,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 226 transitions, 2868 flow [2024-06-21 20:03:28,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 226 transitions, 2743 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:28,093 INFO L231 Difference]: Finished difference. Result has 157 places, 196 transitions, 2289 flow [2024-06-21 20:03:28,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2289, PETRI_PLACES=157, PETRI_TRANSITIONS=196} [2024-06-21 20:03:28,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-21 20:03:28,094 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 196 transitions, 2289 flow [2024-06-21 20:03:28,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:03:28,094 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1746880436, now seen corresponding path program 3 times [2024-06-21 20:03:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139314928] [2024-06-21 20:03:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139314928] [2024-06-21 20:03:28,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139314928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524503050] [2024-06-21 20:03:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:28,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:28,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 196 transitions, 2289 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:28,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:28,642 INFO L124 PetriNetUnfolderBase]: 1584/2726 cut-off events. [2024-06-21 20:03:28,642 INFO L125 PetriNetUnfolderBase]: For 89033/89033 co-relation queries the response was YES. [2024-06-21 20:03:28,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16357 conditions, 2726 events. 1584/2726 cut-off events. For 89033/89033 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16364 event pairs, 305 based on Foata normal form. 12/2730 useless extension candidates. Maximal degree in co-relation 16283. Up to 1455 conditions per place. [2024-06-21 20:03:28,674 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 46 changer transitions 0/226 dead transitions. [2024-06-21 20:03:28,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 226 transitions, 2773 flow [2024-06-21 20:03:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:28,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:03:28,676 INFO L175 Difference]: Start difference. First operand has 157 places, 196 transitions, 2289 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:28,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 226 transitions, 2773 flow [2024-06-21 20:03:28,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 2657 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:28,793 INFO L231 Difference]: Finished difference. Result has 158 places, 195 transitions, 2215 flow [2024-06-21 20:03:28,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2215, PETRI_PLACES=158, PETRI_TRANSITIONS=195} [2024-06-21 20:03:28,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 20:03:28,794 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 195 transitions, 2215 flow [2024-06-21 20:03:28,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:03:28,795 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -150907343, now seen corresponding path program 3 times [2024-06-21 20:03:28,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700472087] [2024-06-21 20:03:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700472087] [2024-06-21 20:03:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700472087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633415738] [2024-06-21 20:03:28,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:28,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:28,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:28,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 195 transitions, 2215 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:29,197 INFO L124 PetriNetUnfolderBase]: 1578/2713 cut-off events. [2024-06-21 20:03:29,197 INFO L125 PetriNetUnfolderBase]: For 77655/77655 co-relation queries the response was YES. [2024-06-21 20:03:29,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15905 conditions, 2713 events. 1578/2713 cut-off events. For 77655/77655 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16230 event pairs, 357 based on Foata normal form. 2/2710 useless extension candidates. Maximal degree in co-relation 15830. Up to 2302 conditions per place. [2024-06-21 20:03:29,216 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 60 changer transitions 0/213 dead transitions. [2024-06-21 20:03:29,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 213 transitions, 2813 flow [2024-06-21 20:03:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:29,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 20:03:29,218 INFO L175 Difference]: Start difference. First operand has 158 places, 195 transitions, 2215 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:29,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 213 transitions, 2813 flow [2024-06-21 20:03:29,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 213 transitions, 2648 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:29,318 INFO L231 Difference]: Finished difference. Result has 158 places, 195 transitions, 2177 flow [2024-06-21 20:03:29,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2177, PETRI_PLACES=158, PETRI_TRANSITIONS=195} [2024-06-21 20:03:29,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 20:03:29,319 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 195 transitions, 2177 flow [2024-06-21 20:03:29,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:03:29,320 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:29,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash -565135467, now seen corresponding path program 4 times [2024-06-21 20:03:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637084155] [2024-06-21 20:03:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637084155] [2024-06-21 20:03:29,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637084155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:29,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289663929] [2024-06-21 20:03:29,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:29,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:29,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:29,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:29,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 195 transitions, 2177 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:29,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:29,736 INFO L124 PetriNetUnfolderBase]: 1562/2694 cut-off events. [2024-06-21 20:03:29,736 INFO L125 PetriNetUnfolderBase]: For 77591/77591 co-relation queries the response was YES. [2024-06-21 20:03:29,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15289 conditions, 2694 events. 1562/2694 cut-off events. For 77591/77591 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16077 event pairs, 349 based on Foata normal form. 4/2696 useless extension candidates. Maximal degree in co-relation 15214. Up to 2383 conditions per place. [2024-06-21 20:03:29,756 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 37 changer transitions 0/210 dead transitions. [2024-06-21 20:03:29,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 210 transitions, 2624 flow [2024-06-21 20:03:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:03:29,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-21 20:03:29,758 INFO L175 Difference]: Start difference. First operand has 158 places, 195 transitions, 2177 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:03:29,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 210 transitions, 2624 flow [2024-06-21 20:03:29,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 210 transitions, 2534 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:29,853 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 2176 flow [2024-06-21 20:03:29,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2176, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-21 20:03:29,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 20:03:29,853 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 2176 flow [2024-06-21 20:03:29,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:03:29,854 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:29,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2128800201, now seen corresponding path program 5 times [2024-06-21 20:03:29,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652208894] [2024-06-21 20:03:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652208894] [2024-06-21 20:03:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652208894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:29,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983326228] [2024-06-21 20:03:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:29,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:29,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:29,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 2176 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:29,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,297 INFO L124 PetriNetUnfolderBase]: 1558/2689 cut-off events. [2024-06-21 20:03:30,298 INFO L125 PetriNetUnfolderBase]: For 78912/78912 co-relation queries the response was YES. [2024-06-21 20:03:30,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15156 conditions, 2689 events. 1558/2689 cut-off events. For 78912/78912 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16049 event pairs, 349 based on Foata normal form. 4/2691 useless extension candidates. Maximal degree in co-relation 15080. Up to 2269 conditions per place. [2024-06-21 20:03:30,318 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 75 changer transitions 0/225 dead transitions. [2024-06-21 20:03:30,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 225 transitions, 2804 flow [2024-06-21 20:03:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:03:30,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 20:03:30,320 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 2176 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:03:30,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 225 transitions, 2804 flow [2024-06-21 20:03:30,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 225 transitions, 2730 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:30,439 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2336 flow [2024-06-21 20:03:30,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2336, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-21 20:03:30,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 20:03:30,440 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2336 flow [2024-06-21 20:03:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:30,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:30,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:03:30,440 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:30,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:30,441 INFO L85 PathProgramCache]: Analyzing trace with hash 933295961, now seen corresponding path program 6 times [2024-06-21 20:03:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:30,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743888195] [2024-06-21 20:03:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:30,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:30,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743888195] [2024-06-21 20:03:30,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743888195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:30,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:30,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994284774] [2024-06-21 20:03:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:30,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:30,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:30,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:30,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:30,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:30,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2336 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:30,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:30,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,844 INFO L124 PetriNetUnfolderBase]: 1548/2674 cut-off events. [2024-06-21 20:03:30,845 INFO L125 PetriNetUnfolderBase]: For 80287/80290 co-relation queries the response was YES. [2024-06-21 20:03:30,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15273 conditions, 2674 events. 1548/2674 cut-off events. For 80287/80290 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15978 event pairs, 357 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 15196. Up to 2259 conditions per place. [2024-06-21 20:03:30,863 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-21 20:03:30,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 220 transitions, 2816 flow [2024-06-21 20:03:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:03:30,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 20:03:30,865 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2336 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:03:30,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 220 transitions, 2816 flow [2024-06-21 20:03:30,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 220 transitions, 2643 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:31,000 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2327 flow [2024-06-21 20:03:31,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2327, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-21 20:03:31,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 20:03:31,001 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2327 flow [2024-06-21 20:03:31,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:03:31,002 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:31,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2016186254, now seen corresponding path program 1 times [2024-06-21 20:03:31,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335982147] [2024-06-21 20:03:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335982147] [2024-06-21 20:03:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335982147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433642927] [2024-06-21 20:03:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:31,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:31,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2327 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:31,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:31,436 INFO L124 PetriNetUnfolderBase]: 1566/2681 cut-off events. [2024-06-21 20:03:31,436 INFO L125 PetriNetUnfolderBase]: For 77128/77128 co-relation queries the response was YES. [2024-06-21 20:03:31,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15307 conditions, 2681 events. 1566/2681 cut-off events. For 77128/77128 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15946 event pairs, 358 based on Foata normal form. 2/2678 useless extension candidates. Maximal degree in co-relation 15231. Up to 2187 conditions per place. [2024-06-21 20:03:31,455 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 95 changer transitions 0/234 dead transitions. [2024-06-21 20:03:31,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 234 transitions, 3165 flow [2024-06-21 20:03:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:31,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:03:31,457 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2327 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:31,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 234 transitions, 3165 flow [2024-06-21 20:03:31,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 234 transitions, 2930 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:31,550 INFO L231 Difference]: Finished difference. Result has 166 places, 215 transitions, 2579 flow [2024-06-21 20:03:31,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2579, PETRI_PLACES=166, PETRI_TRANSITIONS=215} [2024-06-21 20:03:31,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-21 20:03:31,551 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 215 transitions, 2579 flow [2024-06-21 20:03:31,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:03:31,552 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:31,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash -565126384, now seen corresponding path program 2 times [2024-06-21 20:03:31,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288004688] [2024-06-21 20:03:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288004688] [2024-06-21 20:03:31,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288004688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822335463] [2024-06-21 20:03:31,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:31,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:31,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:31,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 215 transitions, 2579 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:31,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:31,999 INFO L124 PetriNetUnfolderBase]: 1600/2744 cut-off events. [2024-06-21 20:03:32,000 INFO L125 PetriNetUnfolderBase]: For 80390/80390 co-relation queries the response was YES. [2024-06-21 20:03:32,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16283 conditions, 2744 events. 1600/2744 cut-off events. For 80390/80390 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16417 event pairs, 348 based on Foata normal form. 2/2744 useless extension candidates. Maximal degree in co-relation 16205. Up to 2415 conditions per place. [2024-06-21 20:03:32,020 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 47 changer transitions 0/244 dead transitions. [2024-06-21 20:03:32,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 244 transitions, 3418 flow [2024-06-21 20:03:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:03:32,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 20:03:32,022 INFO L175 Difference]: Start difference. First operand has 166 places, 215 transitions, 2579 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:03:32,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 244 transitions, 3418 flow [2024-06-21 20:03:32,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 244 transitions, 3341 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:32,145 INFO L231 Difference]: Finished difference. Result has 174 places, 226 transitions, 2802 flow [2024-06-21 20:03:32,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2802, PETRI_PLACES=174, PETRI_TRANSITIONS=226} [2024-06-21 20:03:32,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 20:03:32,146 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 226 transitions, 2802 flow [2024-06-21 20:03:32,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:32,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:32,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:03:32,147 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:32,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash -965154658, now seen corresponding path program 3 times [2024-06-21 20:03:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034481415] [2024-06-21 20:03:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034481415] [2024-06-21 20:03:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034481415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:32,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:32,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:32,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254732786] [2024-06-21 20:03:32,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:32,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:32,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 226 transitions, 2802 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:32,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:32,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:32,615 INFO L124 PetriNetUnfolderBase]: 1626/2789 cut-off events. [2024-06-21 20:03:32,615 INFO L125 PetriNetUnfolderBase]: For 85056/85056 co-relation queries the response was YES. [2024-06-21 20:03:32,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16573 conditions, 2789 events. 1626/2789 cut-off events. For 85056/85056 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16734 event pairs, 348 based on Foata normal form. 2/2789 useless extension candidates. Maximal degree in co-relation 16491. Up to 2318 conditions per place. [2024-06-21 20:03:32,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 99 changer transitions 0/266 dead transitions. [2024-06-21 20:03:32,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 266 transitions, 3719 flow [2024-06-21 20:03:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:03:32,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 20:03:32,637 INFO L175 Difference]: Start difference. First operand has 174 places, 226 transitions, 2802 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:03:32,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 266 transitions, 3719 flow [2024-06-21 20:03:32,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 266 transitions, 3640 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:32,785 INFO L231 Difference]: Finished difference. Result has 181 places, 237 transitions, 3186 flow [2024-06-21 20:03:32,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3186, PETRI_PLACES=181, PETRI_TRANSITIONS=237} [2024-06-21 20:03:32,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-21 20:03:32,786 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 237 transitions, 3186 flow [2024-06-21 20:03:32,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:32,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:32,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:03:32,787 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:32,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1431170954, now seen corresponding path program 1 times [2024-06-21 20:03:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:32,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974831202] [2024-06-21 20:03:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:32,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974831202] [2024-06-21 20:03:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974831202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:32,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:32,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:32,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017748297] [2024-06-21 20:03:32,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:32,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:32,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:32,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:32,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 237 transitions, 3186 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:32,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:32,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:33,241 INFO L124 PetriNetUnfolderBase]: 1647/2817 cut-off events. [2024-06-21 20:03:33,242 INFO L125 PetriNetUnfolderBase]: For 92467/92470 co-relation queries the response was YES. [2024-06-21 20:03:33,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17485 conditions, 2817 events. 1647/2817 cut-off events. For 92467/92470 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16929 event pairs, 382 based on Foata normal form. 1/2810 useless extension candidates. Maximal degree in co-relation 17399. Up to 2265 conditions per place. [2024-06-21 20:03:33,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 126 changer transitions 0/269 dead transitions. [2024-06-21 20:03:33,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 269 transitions, 4190 flow [2024-06-21 20:03:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:03:33,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:03:33,267 INFO L175 Difference]: Start difference. First operand has 181 places, 237 transitions, 3186 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:03:33,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 269 transitions, 4190 flow [2024-06-21 20:03:33,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 269 transitions, 4093 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:33,428 INFO L231 Difference]: Finished difference. Result has 186 places, 246 transitions, 3539 flow [2024-06-21 20:03:33,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3539, PETRI_PLACES=186, PETRI_TRANSITIONS=246} [2024-06-21 20:03:33,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 20:03:33,428 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 246 transitions, 3539 flow [2024-06-21 20:03:33,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:33,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:33,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:03:33,429 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:33,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2073802980, now seen corresponding path program 1 times [2024-06-21 20:03:33,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393278733] [2024-06-21 20:03:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:33,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:33,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393278733] [2024-06-21 20:03:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393278733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:33,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036832788] [2024-06-21 20:03:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:33,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:33,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:33,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 246 transitions, 3539 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:33,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:33,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:33,924 INFO L124 PetriNetUnfolderBase]: 1652/2827 cut-off events. [2024-06-21 20:03:33,925 INFO L125 PetriNetUnfolderBase]: For 93458/93461 co-relation queries the response was YES. [2024-06-21 20:03:33,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17832 conditions, 2827 events. 1652/2827 cut-off events. For 93458/93461 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17038 event pairs, 368 based on Foata normal form. 1/2821 useless extension candidates. Maximal degree in co-relation 17744. Up to 2412 conditions per place. [2024-06-21 20:03:33,944 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 67 changer transitions 0/271 dead transitions. [2024-06-21 20:03:33,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 271 transitions, 4326 flow [2024-06-21 20:03:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:03:33,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 20:03:33,945 INFO L175 Difference]: Start difference. First operand has 186 places, 246 transitions, 3539 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:03:33,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 271 transitions, 4326 flow [2024-06-21 20:03:34,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 271 transitions, 4116 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:34,104 INFO L231 Difference]: Finished difference. Result has 190 places, 249 transitions, 3516 flow [2024-06-21 20:03:34,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3516, PETRI_PLACES=190, PETRI_TRANSITIONS=249} [2024-06-21 20:03:34,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-21 20:03:34,104 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 249 transitions, 3516 flow [2024-06-21 20:03:34,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:34,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:34,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:03:34,105 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:34,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:34,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1571442716, now seen corresponding path program 2 times [2024-06-21 20:03:34,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:34,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359350172] [2024-06-21 20:03:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:34,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:34,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359350172] [2024-06-21 20:03:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359350172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:34,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:34,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853597146] [2024-06-21 20:03:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:34,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:34,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:34,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 249 transitions, 3516 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:34,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:34,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:34,569 INFO L124 PetriNetUnfolderBase]: 1665/2842 cut-off events. [2024-06-21 20:03:34,569 INFO L125 PetriNetUnfolderBase]: For 98636/98639 co-relation queries the response was YES. [2024-06-21 20:03:34,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17966 conditions, 2842 events. 1665/2842 cut-off events. For 98636/98639 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17023 event pairs, 383 based on Foata normal form. 1/2835 useless extension candidates. Maximal degree in co-relation 17877. Up to 2282 conditions per place. [2024-06-21 20:03:34,598 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 136 selfloop transitions, 132 changer transitions 0/276 dead transitions. [2024-06-21 20:03:34,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 276 transitions, 4540 flow [2024-06-21 20:03:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:03:34,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:03:34,600 INFO L175 Difference]: Start difference. First operand has 190 places, 249 transitions, 3516 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:03:34,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 276 transitions, 4540 flow [2024-06-21 20:03:34,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 276 transitions, 4388 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:34,788 INFO L231 Difference]: Finished difference. Result has 192 places, 255 transitions, 3744 flow [2024-06-21 20:03:34,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3744, PETRI_PLACES=192, PETRI_TRANSITIONS=255} [2024-06-21 20:03:34,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-21 20:03:34,788 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 255 transitions, 3744 flow [2024-06-21 20:03:34,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:34,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:34,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:03:34,789 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:34,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash -877693156, now seen corresponding path program 2 times [2024-06-21 20:03:34,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:34,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616445554] [2024-06-21 20:03:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:34,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:34,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616445554] [2024-06-21 20:03:34,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616445554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:34,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:34,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517370402] [2024-06-21 20:03:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:34,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:34,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:34,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 255 transitions, 3744 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:34,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:34,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:35,287 INFO L124 PetriNetUnfolderBase]: 1670/2855 cut-off events. [2024-06-21 20:03:35,287 INFO L125 PetriNetUnfolderBase]: For 103636/103639 co-relation queries the response was YES. [2024-06-21 20:03:35,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18300 conditions, 2855 events. 1670/2855 cut-off events. For 103636/103639 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17165 event pairs, 367 based on Foata normal form. 1/2850 useless extension candidates. Maximal degree in co-relation 18210. Up to 2436 conditions per place. [2024-06-21 20:03:35,308 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 200 selfloop transitions, 70 changer transitions 0/278 dead transitions. [2024-06-21 20:03:35,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 278 transitions, 4547 flow [2024-06-21 20:03:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:03:35,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 20:03:35,310 INFO L175 Difference]: Start difference. First operand has 192 places, 255 transitions, 3744 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:03:35,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 278 transitions, 4547 flow [2024-06-21 20:03:35,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 4277 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:35,498 INFO L231 Difference]: Finished difference. Result has 197 places, 258 transitions, 3667 flow [2024-06-21 20:03:35,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3667, PETRI_PLACES=197, PETRI_TRANSITIONS=258} [2024-06-21 20:03:35,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 20:03:35,498 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 258 transitions, 3667 flow [2024-06-21 20:03:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:35,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:35,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:03:35,499 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:35,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:35,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1571205566, now seen corresponding path program 3 times [2024-06-21 20:03:35,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:35,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785305447] [2024-06-21 20:03:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:35,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:35,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:35,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785305447] [2024-06-21 20:03:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785305447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:35,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392374787] [2024-06-21 20:03:35,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:35,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:35,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:35,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:35,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 258 transitions, 3667 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:35,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:35,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:35,996 INFO L124 PetriNetUnfolderBase]: 1667/2850 cut-off events. [2024-06-21 20:03:35,996 INFO L125 PetriNetUnfolderBase]: For 106488/106491 co-relation queries the response was YES. [2024-06-21 20:03:36,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18054 conditions, 2850 events. 1667/2850 cut-off events. For 106488/106491 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17152 event pairs, 385 based on Foata normal form. 1/2842 useless extension candidates. Maximal degree in co-relation 17964. Up to 2284 conditions per place. [2024-06-21 20:03:36,014 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 136 changer transitions 0/278 dead transitions. [2024-06-21 20:03:36,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 278 transitions, 4513 flow [2024-06-21 20:03:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:36,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:03:36,016 INFO L175 Difference]: Start difference. First operand has 197 places, 258 transitions, 3667 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:36,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 278 transitions, 4513 flow [2024-06-21 20:03:36,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 278 transitions, 4369 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:36,195 INFO L231 Difference]: Finished difference. Result has 200 places, 258 transitions, 3801 flow [2024-06-21 20:03:36,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3801, PETRI_PLACES=200, PETRI_TRANSITIONS=258} [2024-06-21 20:03:36,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-21 20:03:36,196 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 258 transitions, 3801 flow [2024-06-21 20:03:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:36,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:36,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:03:36,197 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:36,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-21 20:03:36,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:36,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620958977] [2024-06-21 20:03:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:36,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620958977] [2024-06-21 20:03:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620958977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:36,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521265246] [2024-06-21 20:03:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:36,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:36,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 258 transitions, 3801 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:36,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:36,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:36,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:36,658 INFO L124 PetriNetUnfolderBase]: 1619/2802 cut-off events. [2024-06-21 20:03:36,659 INFO L125 PetriNetUnfolderBase]: For 119204/119204 co-relation queries the response was YES. [2024-06-21 20:03:36,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18075 conditions, 2802 events. 1619/2802 cut-off events. For 119204/119204 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16979 event pairs, 339 based on Foata normal form. 10/2786 useless extension candidates. Maximal degree in co-relation 17983. Up to 2275 conditions per place. [2024-06-21 20:03:36,680 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 190 selfloop transitions, 37 changer transitions 0/280 dead transitions. [2024-06-21 20:03:36,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 280 transitions, 4339 flow [2024-06-21 20:03:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:03:36,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 20:03:36,682 INFO L175 Difference]: Start difference. First operand has 200 places, 258 transitions, 3801 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:03:36,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 280 transitions, 4339 flow [2024-06-21 20:03:36,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 4068 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:36,888 INFO L231 Difference]: Finished difference. Result has 202 places, 259 transitions, 3626 flow [2024-06-21 20:03:36,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3626, PETRI_PLACES=202, PETRI_TRANSITIONS=259} [2024-06-21 20:03:36,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 20:03:36,889 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 259 transitions, 3626 flow [2024-06-21 20:03:36,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:36,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:36,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:36,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:03:36,890 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:36,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:36,890 INFO L85 PathProgramCache]: Analyzing trace with hash -343530978, now seen corresponding path program 3 times [2024-06-21 20:03:36,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:36,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106422891] [2024-06-21 20:03:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:36,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106422891] [2024-06-21 20:03:36,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106422891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:36,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:36,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:36,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563502529] [2024-06-21 20:03:36,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:36,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:36,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:36,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:36,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:37,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:37,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 259 transitions, 3626 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:37,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:37,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:37,415 INFO L124 PetriNetUnfolderBase]: 1700/2905 cut-off events. [2024-06-21 20:03:37,415 INFO L125 PetriNetUnfolderBase]: For 113903/113903 co-relation queries the response was YES. [2024-06-21 20:03:37,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18395 conditions, 2905 events. 1700/2905 cut-off events. For 113903/113903 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17518 event pairs, 364 based on Foata normal form. 1/2901 useless extension candidates. Maximal degree in co-relation 18302. Up to 2485 conditions per place. [2024-06-21 20:03:37,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 199 selfloop transitions, 70 changer transitions 0/277 dead transitions. [2024-06-21 20:03:37,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 277 transitions, 4298 flow [2024-06-21 20:03:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:03:37,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 20:03:37,441 INFO L175 Difference]: Start difference. First operand has 202 places, 259 transitions, 3626 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:03:37,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 277 transitions, 4298 flow [2024-06-21 20:03:37,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 277 transitions, 4218 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:37,646 INFO L231 Difference]: Finished difference. Result has 204 places, 259 transitions, 3692 flow [2024-06-21 20:03:37,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3546, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3692, PETRI_PLACES=204, PETRI_TRANSITIONS=259} [2024-06-21 20:03:37,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 20:03:37,647 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 259 transitions, 3692 flow [2024-06-21 20:03:37,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:37,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:37,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:03:37,647 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:37,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash -383159096, now seen corresponding path program 4 times [2024-06-21 20:03:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:37,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773020191] [2024-06-21 20:03:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:37,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:37,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773020191] [2024-06-21 20:03:37,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773020191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:37,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:37,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:37,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148684261] [2024-06-21 20:03:37,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:37,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:37,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:37,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:37,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 259 transitions, 3692 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:37,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:37,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:38,103 INFO L124 PetriNetUnfolderBase]: 1694/2895 cut-off events. [2024-06-21 20:03:38,103 INFO L125 PetriNetUnfolderBase]: For 117606/117606 co-relation queries the response was YES. [2024-06-21 20:03:38,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18427 conditions, 2895 events. 1694/2895 cut-off events. For 117606/117606 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17451 event pairs, 363 based on Foata normal form. 2/2892 useless extension candidates. Maximal degree in co-relation 18333. Up to 2333 conditions per place. [2024-06-21 20:03:38,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 127 changer transitions 0/278 dead transitions. [2024-06-21 20:03:38,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 278 transitions, 4462 flow [2024-06-21 20:03:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:38,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:03:38,127 INFO L175 Difference]: Start difference. First operand has 204 places, 259 transitions, 3692 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:38,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 278 transitions, 4462 flow [2024-06-21 20:03:38,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 278 transitions, 4290 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:38,404 INFO L231 Difference]: Finished difference. Result has 206 places, 259 transitions, 3781 flow [2024-06-21 20:03:38,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3781, PETRI_PLACES=206, PETRI_TRANSITIONS=259} [2024-06-21 20:03:38,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-21 20:03:38,405 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 259 transitions, 3781 flow [2024-06-21 20:03:38,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:38,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:38,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:38,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:03:38,405 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:38,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash -723114198, now seen corresponding path program 4 times [2024-06-21 20:03:38,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:38,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347355430] [2024-06-21 20:03:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:38,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:38,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347355430] [2024-06-21 20:03:38,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347355430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:38,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:38,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:38,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59850282] [2024-06-21 20:03:38,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:38,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:38,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:38,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:38,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 259 transitions, 3781 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:38,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:38,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:38,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:38,952 INFO L124 PetriNetUnfolderBase]: 1691/2893 cut-off events. [2024-06-21 20:03:38,952 INFO L125 PetriNetUnfolderBase]: For 120378/120378 co-relation queries the response was YES. [2024-06-21 20:03:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18585 conditions, 2893 events. 1691/2893 cut-off events. For 120378/120378 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17454 event pairs, 364 based on Foata normal form. 1/2889 useless extension candidates. Maximal degree in co-relation 18490. Up to 2474 conditions per place. [2024-06-21 20:03:38,975 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 202 selfloop transitions, 66 changer transitions 0/276 dead transitions. [2024-06-21 20:03:38,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 276 transitions, 4359 flow [2024-06-21 20:03:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:03:38,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:03:38,977 INFO L175 Difference]: Start difference. First operand has 206 places, 259 transitions, 3781 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:03:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 276 transitions, 4359 flow [2024-06-21 20:03:39,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 276 transitions, 3992 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:39,201 INFO L231 Difference]: Finished difference. Result has 207 places, 259 transitions, 3552 flow [2024-06-21 20:03:39,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3552, PETRI_PLACES=207, PETRI_TRANSITIONS=259} [2024-06-21 20:03:39,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 20:03:39,202 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 259 transitions, 3552 flow [2024-06-21 20:03:39,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:39,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:39,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:39,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:03:39,202 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 625864, now seen corresponding path program 5 times [2024-06-21 20:03:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:39,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758042263] [2024-06-21 20:03:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:39,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758042263] [2024-06-21 20:03:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758042263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:39,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:39,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615415430] [2024-06-21 20:03:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:39,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:39,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:39,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 259 transitions, 3552 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:39,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:39,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:39,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:39,740 INFO L124 PetriNetUnfolderBase]: 1693/2903 cut-off events. [2024-06-21 20:03:39,740 INFO L125 PetriNetUnfolderBase]: For 122096/122096 co-relation queries the response was YES. [2024-06-21 20:03:39,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18434 conditions, 2903 events. 1693/2903 cut-off events. For 122096/122096 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17531 event pairs, 355 based on Foata normal form. 2/2903 useless extension candidates. Maximal degree in co-relation 18338. Up to 2552 conditions per place. [2024-06-21 20:03:39,764 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 50 changer transitions 0/280 dead transitions. [2024-06-21 20:03:39,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 280 transitions, 4397 flow [2024-06-21 20:03:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:03:39,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 20:03:39,765 INFO L175 Difference]: Start difference. First operand has 207 places, 259 transitions, 3552 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:03:39,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 280 transitions, 4397 flow [2024-06-21 20:03:40,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 280 transitions, 4218 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:40,039 INFO L231 Difference]: Finished difference. Result has 208 places, 262 transitions, 3541 flow [2024-06-21 20:03:40,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=208, PETRI_TRANSITIONS=262} [2024-06-21 20:03:40,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 20:03:40,041 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 262 transitions, 3541 flow [2024-06-21 20:03:40,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:40,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:40,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:03:40,042 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:40,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1701457736, now seen corresponding path program 6 times [2024-06-21 20:03:40,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:40,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578019121] [2024-06-21 20:03:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:40,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:40,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578019121] [2024-06-21 20:03:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578019121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709736302] [2024-06-21 20:03:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:40,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:40,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:40,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 262 transitions, 3541 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:40,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:40,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:40,577 INFO L124 PetriNetUnfolderBase]: 1695/2902 cut-off events. [2024-06-21 20:03:40,577 INFO L125 PetriNetUnfolderBase]: For 124665/124665 co-relation queries the response was YES. [2024-06-21 20:03:40,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18430 conditions, 2902 events. 1695/2902 cut-off events. For 124665/124665 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17521 event pairs, 351 based on Foata normal form. 2/2902 useless extension candidates. Maximal degree in co-relation 18334. Up to 2418 conditions per place. [2024-06-21 20:03:40,603 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 182 selfloop transitions, 104 changer transitions 0/294 dead transitions. [2024-06-21 20:03:40,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 294 transitions, 4442 flow [2024-06-21 20:03:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 20:03:40,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:03:40,604 INFO L175 Difference]: Start difference. First operand has 208 places, 262 transitions, 3541 flow. Second operand 8 states and 204 transitions. [2024-06-21 20:03:40,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 294 transitions, 4442 flow [2024-06-21 20:03:40,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 294 transitions, 4310 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:40,978 INFO L231 Difference]: Finished difference. Result has 210 places, 265 transitions, 3690 flow [2024-06-21 20:03:40,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3690, PETRI_PLACES=210, PETRI_TRANSITIONS=265} [2024-06-21 20:03:40,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-21 20:03:40,978 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 265 transitions, 3690 flow [2024-06-21 20:03:40,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:40,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:40,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:03:40,979 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:40,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:40,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1778874362, now seen corresponding path program 7 times [2024-06-21 20:03:40,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:40,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565483527] [2024-06-21 20:03:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:41,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565483527] [2024-06-21 20:03:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565483527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:41,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:41,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332152194] [2024-06-21 20:03:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:41,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:41,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:41,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 265 transitions, 3690 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:41,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:41,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:41,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:41,478 INFO L124 PetriNetUnfolderBase]: 1700/2918 cut-off events. [2024-06-21 20:03:41,479 INFO L125 PetriNetUnfolderBase]: For 128847/128850 co-relation queries the response was YES. [2024-06-21 20:03:41,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18765 conditions, 2918 events. 1700/2918 cut-off events. For 128847/128850 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17678 event pairs, 362 based on Foata normal form. 3/2918 useless extension candidates. Maximal degree in co-relation 18668. Up to 2422 conditions per place. [2024-06-21 20:03:41,504 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 107 changer transitions 0/291 dead transitions. [2024-06-21 20:03:41,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 291 transitions, 4674 flow [2024-06-21 20:03:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:41,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:03:41,506 INFO L175 Difference]: Start difference. First operand has 210 places, 265 transitions, 3690 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:41,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 291 transitions, 4674 flow [2024-06-21 20:03:41,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 291 transitions, 4512 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:41,791 INFO L231 Difference]: Finished difference. Result has 212 places, 268 transitions, 3816 flow [2024-06-21 20:03:41,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3816, PETRI_PLACES=212, PETRI_TRANSITIONS=268} [2024-06-21 20:03:41,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-21 20:03:41,791 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 268 transitions, 3816 flow [2024-06-21 20:03:41,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:41,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:41,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:41,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:03:41,792 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:41,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:41,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1774948990, now seen corresponding path program 8 times [2024-06-21 20:03:41,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:41,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029228367] [2024-06-21 20:03:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:41,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:41,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:41,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029228367] [2024-06-21 20:03:41,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029228367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:41,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:41,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:41,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592994895] [2024-06-21 20:03:41,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:41,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:41,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:41,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:41,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:41,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 268 transitions, 3816 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:41,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:41,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:41,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:42,333 INFO L124 PetriNetUnfolderBase]: 1697/2910 cut-off events. [2024-06-21 20:03:42,334 INFO L125 PetriNetUnfolderBase]: For 128541/128544 co-relation queries the response was YES. [2024-06-21 20:03:42,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18682 conditions, 2910 events. 1697/2910 cut-off events. For 128541/128544 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17626 event pairs, 358 based on Foata normal form. 3/2910 useless extension candidates. Maximal degree in co-relation 18585. Up to 2420 conditions per place. [2024-06-21 20:03:42,360 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 107 changer transitions 0/293 dead transitions. [2024-06-21 20:03:42,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 293 transitions, 4648 flow [2024-06-21 20:03:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:03:42,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 20:03:42,365 INFO L175 Difference]: Start difference. First operand has 212 places, 268 transitions, 3816 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:03:42,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 293 transitions, 4648 flow [2024-06-21 20:03:42,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 293 transitions, 4340 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:42,642 INFO L231 Difference]: Finished difference. Result has 214 places, 268 transitions, 3728 flow [2024-06-21 20:03:42,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3728, PETRI_PLACES=214, PETRI_TRANSITIONS=268} [2024-06-21 20:03:42,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 20:03:42,643 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 268 transitions, 3728 flow [2024-06-21 20:03:42,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:42,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:42,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:42,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:03:42,643 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:42,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1936834956, now seen corresponding path program 2 times [2024-06-21 20:03:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:42,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845134047] [2024-06-21 20:03:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:42,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:42,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:42,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845134047] [2024-06-21 20:03:42,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845134047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:42,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:42,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:42,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449881515] [2024-06-21 20:03:42,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:42,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:42,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:42,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:42,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 268 transitions, 3728 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:42,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:42,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:42,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:43,204 INFO L124 PetriNetUnfolderBase]: 1647/2855 cut-off events. [2024-06-21 20:03:43,204 INFO L125 PetriNetUnfolderBase]: For 143898/143898 co-relation queries the response was YES. [2024-06-21 20:03:43,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18364 conditions, 2855 events. 1647/2855 cut-off events. For 143898/143898 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17452 event pairs, 341 based on Foata normal form. 10/2839 useless extension candidates. Maximal degree in co-relation 18267. Up to 2333 conditions per place. [2024-06-21 20:03:43,223 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 204 selfloop transitions, 29 changer transitions 0/289 dead transitions. [2024-06-21 20:03:43,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 289 transitions, 4278 flow [2024-06-21 20:03:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:03:43,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:03:43,224 INFO L175 Difference]: Start difference. First operand has 214 places, 268 transitions, 3728 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:03:43,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 289 transitions, 4278 flow [2024-06-21 20:03:43,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 289 transitions, 3921 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:43,453 INFO L231 Difference]: Finished difference. Result has 212 places, 269 transitions, 3453 flow [2024-06-21 20:03:43,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3453, PETRI_PLACES=212, PETRI_TRANSITIONS=269} [2024-06-21 20:03:43,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-21 20:03:43,453 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 269 transitions, 3453 flow [2024-06-21 20:03:43,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:43,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:43,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:43,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:03:43,454 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:43,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1924322736, now seen corresponding path program 3 times [2024-06-21 20:03:43,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:43,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987831789] [2024-06-21 20:03:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:43,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:43,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987831789] [2024-06-21 20:03:43,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987831789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:43,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:43,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:43,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457853541] [2024-06-21 20:03:43,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:43,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:43,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:43,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:43,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:43,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:43,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 269 transitions, 3453 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:43,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:43,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:43,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:43,970 INFO L124 PetriNetUnfolderBase]: 1684/2921 cut-off events. [2024-06-21 20:03:43,971 INFO L125 PetriNetUnfolderBase]: For 150695/150695 co-relation queries the response was YES. [2024-06-21 20:03:43,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18546 conditions, 2921 events. 1684/2921 cut-off events. For 150695/150695 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 17988 event pairs, 267 based on Foata normal form. 11/2907 useless extension candidates. Maximal degree in co-relation 18448. Up to 2363 conditions per place. [2024-06-21 20:03:43,994 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 210 selfloop transitions, 27 changer transitions 0/293 dead transitions. [2024-06-21 20:03:43,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 293 transitions, 4025 flow [2024-06-21 20:03:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-21 20:03:43,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-21 20:03:43,996 INFO L175 Difference]: Start difference. First operand has 212 places, 269 transitions, 3453 flow. Second operand 5 states and 137 transitions. [2024-06-21 20:03:43,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 293 transitions, 4025 flow [2024-06-21 20:03:44,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 293 transitions, 3965 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:44,241 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 3486 flow [2024-06-21 20:03:44,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3486, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-21 20:03:44,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 20:03:44,242 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 3486 flow [2024-06-21 20:03:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:44,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:44,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:03:44,243 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1331369122, now seen corresponding path program 4 times [2024-06-21 20:03:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367880528] [2024-06-21 20:03:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:44,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:44,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367880528] [2024-06-21 20:03:44,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367880528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:44,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:44,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792132368] [2024-06-21 20:03:44,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:44,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:44,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:44,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:03:44,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 3486 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:44,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:44,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:03:44,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:44,819 INFO L124 PetriNetUnfolderBase]: 1686/2927 cut-off events. [2024-06-21 20:03:44,819 INFO L125 PetriNetUnfolderBase]: For 144031/144031 co-relation queries the response was YES. [2024-06-21 20:03:44,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18531 conditions, 2927 events. 1686/2927 cut-off events. For 144031/144031 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18030 event pairs, 261 based on Foata normal form. 8/2910 useless extension candidates. Maximal degree in co-relation 18432. Up to 2341 conditions per place. [2024-06-21 20:03:44,843 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 212 selfloop transitions, 30 changer transitions 0/298 dead transitions. [2024-06-21 20:03:44,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 298 transitions, 4082 flow [2024-06-21 20:03:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:03:44,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 20:03:44,844 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 3486 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:03:44,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 298 transitions, 4082 flow [2024-06-21 20:03:45,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 298 transitions, 4025 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:45,130 INFO L231 Difference]: Finished difference. Result has 216 places, 272 transitions, 3515 flow [2024-06-21 20:03:45,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3515, PETRI_PLACES=216, PETRI_TRANSITIONS=272} [2024-06-21 20:03:45,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-21 20:03:45,130 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 272 transitions, 3515 flow [2024-06-21 20:03:45,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:45,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:45,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:45,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:03:45,131 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:45,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:45,131 INFO L85 PathProgramCache]: Analyzing trace with hash -117245622, now seen corresponding path program 1 times [2024-06-21 20:03:45,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:45,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079555155] [2024-06-21 20:03:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:45,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079555155] [2024-06-21 20:03:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079555155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:45,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:45,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:45,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090624849] [2024-06-21 20:03:45,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:45,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:45,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:45,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:45,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 272 transitions, 3515 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:45,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:45,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:45,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:45,731 INFO L124 PetriNetUnfolderBase]: 1808/3090 cut-off events. [2024-06-21 20:03:45,731 INFO L125 PetriNetUnfolderBase]: For 143066/143066 co-relation queries the response was YES. [2024-06-21 20:03:45,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19454 conditions, 3090 events. 1808/3090 cut-off events. For 143066/143066 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 18911 event pairs, 316 based on Foata normal form. 4/3089 useless extension candidates. Maximal degree in co-relation 19354. Up to 2572 conditions per place. [2024-06-21 20:03:45,759 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 78 changer transitions 0/301 dead transitions. [2024-06-21 20:03:45,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 301 transitions, 4339 flow [2024-06-21 20:03:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:45,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:03:45,761 INFO L175 Difference]: Start difference. First operand has 216 places, 272 transitions, 3515 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:45,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 301 transitions, 4339 flow [2024-06-21 20:03:46,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 301 transitions, 4271 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:46,028 INFO L231 Difference]: Finished difference. Result has 219 places, 278 transitions, 3691 flow [2024-06-21 20:03:46,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3691, PETRI_PLACES=219, PETRI_TRANSITIONS=278} [2024-06-21 20:03:46,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-21 20:03:46,029 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 278 transitions, 3691 flow [2024-06-21 20:03:46,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:46,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:46,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:46,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:03:46,030 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:46,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:46,030 INFO L85 PathProgramCache]: Analyzing trace with hash -114388662, now seen corresponding path program 2 times [2024-06-21 20:03:46,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:46,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606760003] [2024-06-21 20:03:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:46,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:46,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606760003] [2024-06-21 20:03:46,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606760003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:46,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:46,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956304151] [2024-06-21 20:03:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:46,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:46,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:46,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:46,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 278 transitions, 3691 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:46,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:46,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:46,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:46,548 INFO L124 PetriNetUnfolderBase]: 1824/3107 cut-off events. [2024-06-21 20:03:46,548 INFO L125 PetriNetUnfolderBase]: For 148832/148832 co-relation queries the response was YES. [2024-06-21 20:03:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 3107 events. 1824/3107 cut-off events. For 148832/148832 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 18976 event pairs, 373 based on Foata normal form. 4/3106 useless extension candidates. Maximal degree in co-relation 19793. Up to 2668 conditions per place. [2024-06-21 20:03:46,574 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 73 changer transitions 0/299 dead transitions. [2024-06-21 20:03:46,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 299 transitions, 4361 flow [2024-06-21 20:03:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:03:46,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 20:03:46,576 INFO L175 Difference]: Start difference. First operand has 219 places, 278 transitions, 3691 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:03:46,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 299 transitions, 4361 flow [2024-06-21 20:03:46,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 299 transitions, 4224 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:46,852 INFO L231 Difference]: Finished difference. Result has 224 places, 281 transitions, 3756 flow [2024-06-21 20:03:46,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3756, PETRI_PLACES=224, PETRI_TRANSITIONS=281} [2024-06-21 20:03:46,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 20:03:46,853 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 281 transitions, 3756 flow [2024-06-21 20:03:46,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:46,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:46,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:46,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:03:46,853 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:46,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash 902508, now seen corresponding path program 3 times [2024-06-21 20:03:46,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:46,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120795255] [2024-06-21 20:03:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:46,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:46,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:46,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120795255] [2024-06-21 20:03:46,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120795255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:46,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:46,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:46,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800295939] [2024-06-21 20:03:46,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:46,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:46,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:46,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:46,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 281 transitions, 3756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:46,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:46,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:46,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:47,410 INFO L124 PetriNetUnfolderBase]: 1896/3226 cut-off events. [2024-06-21 20:03:47,411 INFO L125 PetriNetUnfolderBase]: For 179038/179038 co-relation queries the response was YES. [2024-06-21 20:03:47,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20647 conditions, 3226 events. 1896/3226 cut-off events. For 179038/179038 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19782 event pairs, 373 based on Foata normal form. 20/3244 useless extension candidates. Maximal degree in co-relation 20543. Up to 2811 conditions per place. [2024-06-21 20:03:47,438 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 42 changer transitions 0/306 dead transitions. [2024-06-21 20:03:47,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 306 transitions, 4495 flow [2024-06-21 20:03:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:03:47,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 20:03:47,439 INFO L175 Difference]: Start difference. First operand has 224 places, 281 transitions, 3756 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:03:47,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 306 transitions, 4495 flow [2024-06-21 20:03:47,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 306 transitions, 4333 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:47,736 INFO L231 Difference]: Finished difference. Result has 227 places, 286 transitions, 3770 flow [2024-06-21 20:03:47,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=227, PETRI_TRANSITIONS=286} [2024-06-21 20:03:47,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-21 20:03:47,737 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 286 transitions, 3770 flow [2024-06-21 20:03:47,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:47,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:47,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:47,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:03:47,737 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:47,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:47,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1087206, now seen corresponding path program 1 times [2024-06-21 20:03:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812072424] [2024-06-21 20:03:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:47,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:47,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812072424] [2024-06-21 20:03:47,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812072424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:47,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:47,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937584503] [2024-06-21 20:03:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:47,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:47,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:47,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 286 transitions, 3770 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:47,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:47,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:47,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:48,332 INFO L124 PetriNetUnfolderBase]: 1904/3236 cut-off events. [2024-06-21 20:03:48,333 INFO L125 PetriNetUnfolderBase]: For 156869/156869 co-relation queries the response was YES. [2024-06-21 20:03:48,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20860 conditions, 3236 events. 1904/3236 cut-off events. For 156869/156869 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19791 event pairs, 373 based on Foata normal form. 2/3236 useless extension candidates. Maximal degree in co-relation 20755. Up to 2917 conditions per place. [2024-06-21 20:03:48,364 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 272 selfloop transitions, 24 changer transitions 0/304 dead transitions. [2024-06-21 20:03:48,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 304 transitions, 4443 flow [2024-06-21 20:03:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 20:03:48,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 20:03:48,366 INFO L175 Difference]: Start difference. First operand has 227 places, 286 transitions, 3770 flow. Second operand 7 states and 161 transitions. [2024-06-21 20:03:48,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 304 transitions, 4443 flow [2024-06-21 20:03:48,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 304 transitions, 4335 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:48,757 INFO L231 Difference]: Finished difference. Result has 229 places, 289 transitions, 3770 flow [2024-06-21 20:03:48,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3770, PETRI_PLACES=229, PETRI_TRANSITIONS=289} [2024-06-21 20:03:48,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 20:03:48,758 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 289 transitions, 3770 flow [2024-06-21 20:03:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:48,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:48,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:48,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:03:48,758 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:48,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash 144972986, now seen corresponding path program 4 times [2024-06-21 20:03:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:48,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007616212] [2024-06-21 20:03:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:48,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:48,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007616212] [2024-06-21 20:03:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007616212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:48,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:48,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447849921] [2024-06-21 20:03:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:48,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:48,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:48,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 289 transitions, 3770 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:48,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:48,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:48,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:49,451 INFO L124 PetriNetUnfolderBase]: 1963/3336 cut-off events. [2024-06-21 20:03:49,451 INFO L125 PetriNetUnfolderBase]: For 189232/189232 co-relation queries the response was YES. [2024-06-21 20:03:49,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21281 conditions, 3336 events. 1963/3336 cut-off events. For 189232/189232 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20524 event pairs, 323 based on Foata normal form. 20/3354 useless extension candidates. Maximal degree in co-relation 21174. Up to 2699 conditions per place. [2024-06-21 20:03:49,474 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 91 changer transitions 0/327 dead transitions. [2024-06-21 20:03:49,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 4574 flow [2024-06-21 20:03:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 20:03:49,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:03:49,476 INFO L175 Difference]: Start difference. First operand has 229 places, 289 transitions, 3770 flow. Second operand 8 states and 208 transitions. [2024-06-21 20:03:49,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 4574 flow [2024-06-21 20:03:49,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 327 transitions, 4495 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:49,832 INFO L231 Difference]: Finished difference. Result has 233 places, 293 transitions, 3967 flow [2024-06-21 20:03:49,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3967, PETRI_PLACES=233, PETRI_TRANSITIONS=293} [2024-06-21 20:03:49,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-21 20:03:49,833 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 293 transitions, 3967 flow [2024-06-21 20:03:49,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:49,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:49,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:49,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:03:49,834 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:49,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash 145157684, now seen corresponding path program 2 times [2024-06-21 20:03:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:49,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065088252] [2024-06-21 20:03:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:49,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:49,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065088252] [2024-06-21 20:03:49,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065088252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:49,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:49,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878425173] [2024-06-21 20:03:49,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:49,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:49,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:49,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:49,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 293 transitions, 3967 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:49,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:49,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:49,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:50,378 INFO L124 PetriNetUnfolderBase]: 1976/3350 cut-off events. [2024-06-21 20:03:50,378 INFO L125 PetriNetUnfolderBase]: For 166795/166795 co-relation queries the response was YES. [2024-06-21 20:03:50,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21990 conditions, 3350 events. 1976/3350 cut-off events. For 166795/166795 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20574 event pairs, 380 based on Foata normal form. 2/3350 useless extension candidates. Maximal degree in co-relation 21882. Up to 3022 conditions per place. [2024-06-21 20:03:50,408 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 275 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-21 20:03:50,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 312 transitions, 4694 flow [2024-06-21 20:03:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:03:50,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-21 20:03:50,409 INFO L175 Difference]: Start difference. First operand has 233 places, 293 transitions, 3967 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:03:50,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 312 transitions, 4694 flow [2024-06-21 20:03:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 312 transitions, 4500 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:50,765 INFO L231 Difference]: Finished difference. Result has 234 places, 298 transitions, 3928 flow [2024-06-21 20:03:50,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3928, PETRI_PLACES=234, PETRI_TRANSITIONS=298} [2024-06-21 20:03:50,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-21 20:03:50,766 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 298 transitions, 3928 flow [2024-06-21 20:03:50,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:50,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:50,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:50,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:03:50,766 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:50,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1561578098, now seen corresponding path program 3 times [2024-06-21 20:03:50,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:50,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518440673] [2024-06-21 20:03:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:50,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:50,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518440673] [2024-06-21 20:03:50,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518440673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:50,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:50,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:50,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620458949] [2024-06-21 20:03:50,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:50,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:50,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:50,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:50,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:50,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:50,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 298 transitions, 3928 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:50,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:50,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:50,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:51,305 INFO L124 PetriNetUnfolderBase]: 1984/3362 cut-off events. [2024-06-21 20:03:51,305 INFO L125 PetriNetUnfolderBase]: For 165621/165621 co-relation queries the response was YES. [2024-06-21 20:03:51,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21718 conditions, 3362 events. 1984/3362 cut-off events. For 165621/165621 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20663 event pairs, 382 based on Foata normal form. 2/3362 useless extension candidates. Maximal degree in co-relation 21609. Up to 3028 conditions per place. [2024-06-21 20:03:51,334 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 276 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2024-06-21 20:03:51,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 313 transitions, 4614 flow [2024-06-21 20:03:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:03:51,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:51,336 INFO L175 Difference]: Start difference. First operand has 234 places, 298 transitions, 3928 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:03:51,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 313 transitions, 4614 flow [2024-06-21 20:03:51,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 313 transitions, 4538 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:51,711 INFO L231 Difference]: Finished difference. Result has 237 places, 300 transitions, 3969 flow [2024-06-21 20:03:51,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3969, PETRI_PLACES=237, PETRI_TRANSITIONS=300} [2024-06-21 20:03:51,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-21 20:03:51,712 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 300 transitions, 3969 flow [2024-06-21 20:03:51,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:51,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:51,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:51,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:03:51,712 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:51,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 4 times [2024-06-21 20:03:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:51,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208324704] [2024-06-21 20:03:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:51,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:51,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208324704] [2024-06-21 20:03:51,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208324704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:51,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:51,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354806245] [2024-06-21 20:03:51,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:51,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:51,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:51,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:51,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 300 transitions, 3969 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:51,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:51,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:51,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:52,270 INFO L124 PetriNetUnfolderBase]: 1979/3360 cut-off events. [2024-06-21 20:03:52,271 INFO L125 PetriNetUnfolderBase]: For 162497/162500 co-relation queries the response was YES. [2024-06-21 20:03:52,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21523 conditions, 3360 events. 1979/3360 cut-off events. For 162497/162500 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20696 event pairs, 380 based on Foata normal form. 4/3361 useless extension candidates. Maximal degree in co-relation 21413. Up to 3007 conditions per place. [2024-06-21 20:03:52,302 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 275 selfloop transitions, 30 changer transitions 0/313 dead transitions. [2024-06-21 20:03:52,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 4649 flow [2024-06-21 20:03:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 20:03:52,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:03:52,303 INFO L175 Difference]: Start difference. First operand has 237 places, 300 transitions, 3969 flow. Second operand 5 states and 120 transitions. [2024-06-21 20:03:52,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 4649 flow [2024-06-21 20:03:52,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 4558 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:52,699 INFO L231 Difference]: Finished difference. Result has 239 places, 302 transitions, 3991 flow [2024-06-21 20:03:52,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3991, PETRI_PLACES=239, PETRI_TRANSITIONS=302} [2024-06-21 20:03:52,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-21 20:03:52,700 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 302 transitions, 3991 flow [2024-06-21 20:03:52,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:52,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:52,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:03:52,701 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:52,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1708044062, now seen corresponding path program 1 times [2024-06-21 20:03:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075329618] [2024-06-21 20:03:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:52,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:52,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075329618] [2024-06-21 20:03:52,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075329618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:52,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393721541] [2024-06-21 20:03:52,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:52,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:52,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 302 transitions, 3991 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:52,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:52,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:52,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:53,305 INFO L124 PetriNetUnfolderBase]: 1992/3377 cut-off events. [2024-06-21 20:03:53,306 INFO L125 PetriNetUnfolderBase]: For 161851/161851 co-relation queries the response was YES. [2024-06-21 20:03:53,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21656 conditions, 3377 events. 1992/3377 cut-off events. For 161851/161851 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20780 event pairs, 379 based on Foata normal form. 1/3376 useless extension candidates. Maximal degree in co-relation 21545. Up to 3022 conditions per place. [2024-06-21 20:03:53,336 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 296 selfloop transitions, 31 changer transitions 0/335 dead transitions. [2024-06-21 20:03:53,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 335 transitions, 4913 flow [2024-06-21 20:03:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:53,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:03:53,338 INFO L175 Difference]: Start difference. First operand has 239 places, 302 transitions, 3991 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:53,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 335 transitions, 4913 flow [2024-06-21 20:03:53,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 335 transitions, 4820 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:53,702 INFO L231 Difference]: Finished difference. Result has 243 places, 308 transitions, 4056 flow [2024-06-21 20:03:53,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4056, PETRI_PLACES=243, PETRI_TRANSITIONS=308} [2024-06-21 20:03:53,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 20:03:53,703 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 308 transitions, 4056 flow [2024-06-21 20:03:53,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:53,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:53,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:53,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:03:53,704 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:53,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:53,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1343070004, now seen corresponding path program 2 times [2024-06-21 20:03:53,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:53,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188469683] [2024-06-21 20:03:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:53,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188469683] [2024-06-21 20:03:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188469683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:53,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719786762] [2024-06-21 20:03:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:53,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:53,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:53,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:53,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 308 transitions, 4056 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:53,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:53,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:53,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:54,323 INFO L124 PetriNetUnfolderBase]: 2002/3393 cut-off events. [2024-06-21 20:03:54,323 INFO L125 PetriNetUnfolderBase]: For 167790/167790 co-relation queries the response was YES. [2024-06-21 20:03:54,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22010 conditions, 3393 events. 2002/3393 cut-off events. For 167790/167790 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20878 event pairs, 379 based on Foata normal form. 1/3392 useless extension candidates. Maximal degree in co-relation 21898. Up to 3032 conditions per place. [2024-06-21 20:03:54,353 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 297 selfloop transitions, 38 changer transitions 0/343 dead transitions. [2024-06-21 20:03:54,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 343 transitions, 4993 flow [2024-06-21 20:03:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 20:03:54,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-21 20:03:54,355 INFO L175 Difference]: Start difference. First operand has 243 places, 308 transitions, 4056 flow. Second operand 9 states and 212 transitions. [2024-06-21 20:03:54,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 343 transitions, 4993 flow [2024-06-21 20:03:54,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 343 transitions, 4844 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:54,716 INFO L231 Difference]: Finished difference. Result has 247 places, 314 transitions, 4066 flow [2024-06-21 20:03:54,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3923, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4066, PETRI_PLACES=247, PETRI_TRANSITIONS=314} [2024-06-21 20:03:54,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 20:03:54,717 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 314 transitions, 4066 flow [2024-06-21 20:03:54,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:54,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:54,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:54,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:03:54,718 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:54,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1710903998, now seen corresponding path program 1 times [2024-06-21 20:03:54,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:54,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947927907] [2024-06-21 20:03:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:54,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:54,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947927907] [2024-06-21 20:03:54,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947927907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:54,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:54,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:54,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718693259] [2024-06-21 20:03:54,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:54,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:54,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:54,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:54,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:54,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 314 transitions, 4066 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:54,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:54,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:54,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:55,335 INFO L124 PetriNetUnfolderBase]: 2010/3405 cut-off events. [2024-06-21 20:03:55,335 INFO L125 PetriNetUnfolderBase]: For 174097/174097 co-relation queries the response was YES. [2024-06-21 20:03:55,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22148 conditions, 3405 events. 2010/3405 cut-off events. For 174097/174097 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20934 event pairs, 298 based on Foata normal form. 2/3405 useless extension candidates. Maximal degree in co-relation 22037. Up to 3010 conditions per place. [2024-06-21 20:03:55,367 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 307 selfloop transitions, 33 changer transitions 0/348 dead transitions. [2024-06-21 20:03:55,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 5016 flow [2024-06-21 20:03:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:55,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:03:55,368 INFO L175 Difference]: Start difference. First operand has 247 places, 314 transitions, 4066 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:55,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 5016 flow [2024-06-21 20:03:55,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 348 transitions, 4918 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:55,802 INFO L231 Difference]: Finished difference. Result has 249 places, 319 transitions, 4133 flow [2024-06-21 20:03:55,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4133, PETRI_PLACES=249, PETRI_TRANSITIONS=319} [2024-06-21 20:03:55,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 20:03:55,803 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 319 transitions, 4133 flow [2024-06-21 20:03:55,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:55,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:55,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:03:55,803 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:55,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1343067028, now seen corresponding path program 2 times [2024-06-21 20:03:55,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:55,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300859377] [2024-06-21 20:03:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:55,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:55,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300859377] [2024-06-21 20:03:55,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300859377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:55,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:55,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:55,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929777363] [2024-06-21 20:03:55,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:55,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:55,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:55,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:55,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 319 transitions, 4133 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:55,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:55,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:56,467 INFO L124 PetriNetUnfolderBase]: 2018/3417 cut-off events. [2024-06-21 20:03:56,467 INFO L125 PetriNetUnfolderBase]: For 179990/179990 co-relation queries the response was YES. [2024-06-21 20:03:56,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22438 conditions, 3417 events. 2018/3417 cut-off events. For 179990/179990 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20994 event pairs, 377 based on Foata normal form. 2/3417 useless extension candidates. Maximal degree in co-relation 22325. Up to 3071 conditions per place. [2024-06-21 20:03:56,495 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 309 selfloop transitions, 28 changer transitions 0/345 dead transitions. [2024-06-21 20:03:56,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 345 transitions, 4905 flow [2024-06-21 20:03:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:03:56,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 20:03:56,497 INFO L175 Difference]: Start difference. First operand has 249 places, 319 transitions, 4133 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:03:56,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 345 transitions, 4905 flow [2024-06-21 20:03:56,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 345 transitions, 4813 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:56,949 INFO L231 Difference]: Finished difference. Result has 253 places, 321 transitions, 4144 flow [2024-06-21 20:03:56,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4144, PETRI_PLACES=253, PETRI_TRANSITIONS=321} [2024-06-21 20:03:56,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 20:03:56,949 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 321 transitions, 4144 flow [2024-06-21 20:03:56,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:56,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:03:56,950 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:56,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1618286388, now seen corresponding path program 3 times [2024-06-21 20:03:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:56,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755138764] [2024-06-21 20:03:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755138764] [2024-06-21 20:03:57,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755138764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:57,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:57,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:57,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869032160] [2024-06-21 20:03:57,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:57,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:57,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:57,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:57,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 321 transitions, 4144 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:57,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,546 INFO L124 PetriNetUnfolderBase]: 2039/3446 cut-off events. [2024-06-21 20:03:57,547 INFO L125 PetriNetUnfolderBase]: For 188464/188467 co-relation queries the response was YES. [2024-06-21 20:03:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22796 conditions, 3446 events. 2039/3446 cut-off events. For 188464/188467 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 21262 event pairs, 412 based on Foata normal form. 1/3434 useless extension candidates. Maximal degree in co-relation 22681. Up to 2834 conditions per place. [2024-06-21 20:03:57,582 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 102 changer transitions 0/361 dead transitions. [2024-06-21 20:03:57,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 361 transitions, 5610 flow [2024-06-21 20:03:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:03:57,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:03:57,584 INFO L175 Difference]: Start difference. First operand has 253 places, 321 transitions, 4144 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:03:57,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 361 transitions, 5610 flow [2024-06-21 20:03:57,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 361 transitions, 5541 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:57,998 INFO L231 Difference]: Finished difference. Result has 255 places, 334 transitions, 4491 flow [2024-06-21 20:03:57,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4491, PETRI_PLACES=255, PETRI_TRANSITIONS=334} [2024-06-21 20:03:57,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-21 20:03:57,999 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 334 transitions, 4491 flow [2024-06-21 20:03:57,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:57,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:57,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:03:58,000 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:58,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1452945784, now seen corresponding path program 4 times [2024-06-21 20:03:58,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:58,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495608216] [2024-06-21 20:03:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:58,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495608216] [2024-06-21 20:03:58,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495608216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:58,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138739119] [2024-06-21 20:03:58,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:58,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:58,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:58,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 334 transitions, 4491 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:58,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:58,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:58,660 INFO L124 PetriNetUnfolderBase]: 2044/3455 cut-off events. [2024-06-21 20:03:58,660 INFO L125 PetriNetUnfolderBase]: For 196321/196324 co-relation queries the response was YES. [2024-06-21 20:03:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3455 events. 2044/3455 cut-off events. For 196321/196324 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21312 event pairs, 412 based on Foata normal form. 1/3443 useless extension candidates. Maximal degree in co-relation 23386. Up to 2838 conditions per place. [2024-06-21 20:03:58,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 104 changer transitions 0/360 dead transitions. [2024-06-21 20:03:58,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 360 transitions, 5685 flow [2024-06-21 20:03:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:58,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:03:58,691 INFO L175 Difference]: Start difference. First operand has 255 places, 334 transitions, 4491 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:58,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 360 transitions, 5685 flow [2024-06-21 20:03:59,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 360 transitions, 5562 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:59,128 INFO L231 Difference]: Finished difference. Result has 261 places, 337 transitions, 4638 flow [2024-06-21 20:03:59,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4638, PETRI_PLACES=261, PETRI_TRANSITIONS=337} [2024-06-21 20:03:59,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 20:03:59,128 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 337 transitions, 4638 flow [2024-06-21 20:03:59,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:59,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:59,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:03:59,129 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:59,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:59,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1474857164, now seen corresponding path program 5 times [2024-06-21 20:03:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:59,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473320465] [2024-06-21 20:03:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:59,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:59,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:59,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473320465] [2024-06-21 20:03:59,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473320465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:59,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:59,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:59,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251683352] [2024-06-21 20:03:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:59,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:59,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:59,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:59,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:03:59,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 337 transitions, 4638 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:59,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:03:59,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:59,753 INFO L124 PetriNetUnfolderBase]: 2049/3474 cut-off events. [2024-06-21 20:03:59,754 INFO L125 PetriNetUnfolderBase]: For 200639/200639 co-relation queries the response was YES. [2024-06-21 20:03:59,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23672 conditions, 3474 events. 2049/3474 cut-off events. For 200639/200639 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21497 event pairs, 377 based on Foata normal form. 1/3473 useless extension candidates. Maximal degree in co-relation 23553. Up to 3117 conditions per place. [2024-06-21 20:03:59,788 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 321 selfloop transitions, 28 changer transitions 0/357 dead transitions. [2024-06-21 20:03:59,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 357 transitions, 5423 flow [2024-06-21 20:03:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:03:59,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:03:59,790 INFO L175 Difference]: Start difference. First operand has 261 places, 337 transitions, 4638 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:03:59,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 357 transitions, 5423 flow [2024-06-21 20:04:00,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 357 transitions, 5267 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:00,234 INFO L231 Difference]: Finished difference. Result has 265 places, 340 transitions, 4595 flow [2024-06-21 20:04:00,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4595, PETRI_PLACES=265, PETRI_TRANSITIONS=340} [2024-06-21 20:04:00,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 20:04:00,235 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 340 transitions, 4595 flow [2024-06-21 20:04:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:00,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:04:00,235 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:00,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:00,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1470095564, now seen corresponding path program 6 times [2024-06-21 20:04:00,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:00,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285288288] [2024-06-21 20:04:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:00,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:00,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285288288] [2024-06-21 20:04:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285288288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:00,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:00,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722806304] [2024-06-21 20:04:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:00,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:00,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:00,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:00,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 340 transitions, 4595 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:00,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:00,899 INFO L124 PetriNetUnfolderBase]: 2070/3497 cut-off events. [2024-06-21 20:04:00,899 INFO L125 PetriNetUnfolderBase]: For 211485/211488 co-relation queries the response was YES. [2024-06-21 20:04:00,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23888 conditions, 3497 events. 2070/3497 cut-off events. For 211485/211488 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21602 event pairs, 412 based on Foata normal form. 1/3485 useless extension candidates. Maximal degree in co-relation 23768. Up to 2861 conditions per place. [2024-06-21 20:04:00,931 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 114 changer transitions 0/367 dead transitions. [2024-06-21 20:04:00,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 367 transitions, 5860 flow [2024-06-21 20:04:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:04:00,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:04:00,932 INFO L175 Difference]: Start difference. First operand has 265 places, 340 transitions, 4595 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:04:00,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 367 transitions, 5860 flow [2024-06-21 20:04:01,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 367 transitions, 5786 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:01,373 INFO L231 Difference]: Finished difference. Result has 268 places, 347 transitions, 4864 flow [2024-06-21 20:04:01,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4864, PETRI_PLACES=268, PETRI_TRANSITIONS=347} [2024-06-21 20:04:01,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 20:04:01,374 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 347 transitions, 4864 flow [2024-06-21 20:04:01,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:01,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:01,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:04:01,374 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:01,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1474860140, now seen corresponding path program 3 times [2024-06-21 20:04:01,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:01,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477465932] [2024-06-21 20:04:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:01,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:01,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:01,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477465932] [2024-06-21 20:04:01,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477465932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:01,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:01,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:01,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452497149] [2024-06-21 20:04:01,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:01,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:01,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:01,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:01,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:01,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 347 transitions, 4864 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:01,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:01,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:02,047 INFO L124 PetriNetUnfolderBase]: 2065/3502 cut-off events. [2024-06-21 20:04:02,047 INFO L125 PetriNetUnfolderBase]: For 215232/215232 co-relation queries the response was YES. [2024-06-21 20:04:02,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24083 conditions, 3502 events. 2065/3502 cut-off events. For 215232/215232 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21682 event pairs, 376 based on Foata normal form. 2/3502 useless extension candidates. Maximal degree in co-relation 23962. Up to 3136 conditions per place. [2024-06-21 20:04:02,083 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 330 selfloop transitions, 27 changer transitions 0/365 dead transitions. [2024-06-21 20:04:02,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 365 transitions, 5622 flow [2024-06-21 20:04:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:04:02,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:04:02,084 INFO L175 Difference]: Start difference. First operand has 268 places, 347 transitions, 4864 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:04:02,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 365 transitions, 5622 flow [2024-06-21 20:04:02,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 365 transitions, 5433 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:02,503 INFO L231 Difference]: Finished difference. Result has 272 places, 347 transitions, 4734 flow [2024-06-21 20:04:02,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4734, PETRI_PLACES=272, PETRI_TRANSITIONS=347} [2024-06-21 20:04:02,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 20:04:02,504 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 347 transitions, 4734 flow [2024-06-21 20:04:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:02,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:02,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:04:02,505 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:02,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1628774587, now seen corresponding path program 1 times [2024-06-21 20:04:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977877551] [2024-06-21 20:04:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:02,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:02,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977877551] [2024-06-21 20:04:02,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977877551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:02,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580921502] [2024-06-21 20:04:02,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:02,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:02,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:02,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:02,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 347 transitions, 4734 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:02,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:02,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:02,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:03,158 INFO L124 PetriNetUnfolderBase]: 2070/3505 cut-off events. [2024-06-21 20:04:03,158 INFO L125 PetriNetUnfolderBase]: For 219087/219090 co-relation queries the response was YES. [2024-06-21 20:04:03,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23928 conditions, 3505 events. 2070/3505 cut-off events. For 219087/219090 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21678 event pairs, 416 based on Foata normal form. 1/3497 useless extension candidates. Maximal degree in co-relation 23806. Up to 2901 conditions per place. [2024-06-21 20:04:03,195 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 150 changer transitions 0/373 dead transitions. [2024-06-21 20:04:03,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 373 transitions, 5834 flow [2024-06-21 20:04:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:04:03,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 20:04:03,196 INFO L175 Difference]: Start difference. First operand has 272 places, 347 transitions, 4734 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:04:03,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 373 transitions, 5834 flow [2024-06-21 20:04:03,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 373 transitions, 5795 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:03,672 INFO L231 Difference]: Finished difference. Result has 277 places, 350 transitions, 5047 flow [2024-06-21 20:04:03,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4695, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5047, PETRI_PLACES=277, PETRI_TRANSITIONS=350} [2024-06-21 20:04:03,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-21 20:04:03,672 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 350 transitions, 5047 flow [2024-06-21 20:04:03,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:03,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:03,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:03,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:04:03,673 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:03,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:03,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1674104751, now seen corresponding path program 2 times [2024-06-21 20:04:03,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:03,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256782856] [2024-06-21 20:04:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:03,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:03,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256782856] [2024-06-21 20:04:03,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256782856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:03,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:03,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:03,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829276528] [2024-06-21 20:04:03,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:03,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:03,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:03,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:03,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:03,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:03,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 350 transitions, 5047 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:03,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:03,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:03,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:04,327 INFO L124 PetriNetUnfolderBase]: 2075/3514 cut-off events. [2024-06-21 20:04:04,327 INFO L125 PetriNetUnfolderBase]: For 226740/226743 co-relation queries the response was YES. [2024-06-21 20:04:04,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24427 conditions, 3514 events. 2075/3514 cut-off events. For 226740/226743 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21825 event pairs, 415 based on Foata normal form. 1/3506 useless extension candidates. Maximal degree in co-relation 24304. Up to 2907 conditions per place. [2024-06-21 20:04:04,362 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 153 changer transitions 0/376 dead transitions. [2024-06-21 20:04:04,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 376 transitions, 6163 flow [2024-06-21 20:04:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:04:04,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:04:04,364 INFO L175 Difference]: Start difference. First operand has 277 places, 350 transitions, 5047 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:04:04,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 376 transitions, 6163 flow [2024-06-21 20:04:04,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 376 transitions, 5909 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:04,949 INFO L231 Difference]: Finished difference. Result has 280 places, 353 transitions, 5157 flow [2024-06-21 20:04:04,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5157, PETRI_PLACES=280, PETRI_TRANSITIONS=353} [2024-06-21 20:04:04,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 20:04:04,950 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 353 transitions, 5157 flow [2024-06-21 20:04:04,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:04,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:04,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:04,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:04:04,950 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:04,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:04,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1210562189, now seen corresponding path program 3 times [2024-06-21 20:04:04,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:04,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401729903] [2024-06-21 20:04:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:04,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:05,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:05,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401729903] [2024-06-21 20:04:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401729903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:05,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:05,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:05,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565616943] [2024-06-21 20:04:05,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:05,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:05,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:05,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 353 transitions, 5157 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:05,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:05,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:05,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:05,625 INFO L124 PetriNetUnfolderBase]: 2088/3536 cut-off events. [2024-06-21 20:04:05,625 INFO L125 PetriNetUnfolderBase]: For 236564/236567 co-relation queries the response was YES. [2024-06-21 20:04:05,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24756 conditions, 3536 events. 2088/3536 cut-off events. For 236564/236567 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21950 event pairs, 417 based on Foata normal form. 1/3528 useless extension candidates. Maximal degree in co-relation 24631. Up to 2922 conditions per place. [2024-06-21 20:04:05,661 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 159 changer transitions 0/381 dead transitions. [2024-06-21 20:04:05,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 381 transitions, 6479 flow [2024-06-21 20:04:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 20:04:05,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-21 20:04:05,662 INFO L175 Difference]: Start difference. First operand has 280 places, 353 transitions, 5157 flow. Second operand 9 states and 214 transitions. [2024-06-21 20:04:05,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 381 transitions, 6479 flow [2024-06-21 20:04:06,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 381 transitions, 6125 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:06,259 INFO L231 Difference]: Finished difference. Result has 283 places, 359 transitions, 5237 flow [2024-06-21 20:04:06,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5237, PETRI_PLACES=283, PETRI_TRANSITIONS=359} [2024-06-21 20:04:06,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-21 20:04:06,260 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 359 transitions, 5237 flow [2024-06-21 20:04:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:06,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:06,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:06,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:04:06,261 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:06,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1438682819, now seen corresponding path program 4 times [2024-06-21 20:04:06,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:06,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548477001] [2024-06-21 20:04:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:06,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:06,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:06,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548477001] [2024-06-21 20:04:06,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548477001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:06,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:06,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636108487] [2024-06-21 20:04:06,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:06,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:06,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 359 transitions, 5237 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:06,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:06,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:06,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:06,994 INFO L124 PetriNetUnfolderBase]: 2101/3561 cut-off events. [2024-06-21 20:04:06,994 INFO L125 PetriNetUnfolderBase]: For 245277/245280 co-relation queries the response was YES. [2024-06-21 20:04:07,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25046 conditions, 3561 events. 2101/3561 cut-off events. For 245277/245280 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 22156 event pairs, 412 based on Foata normal form. 1/3556 useless extension candidates. Maximal degree in co-relation 24920. Up to 2937 conditions per place. [2024-06-21 20:04:07,029 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 217 selfloop transitions, 163 changer transitions 0/388 dead transitions. [2024-06-21 20:04:07,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 388 transitions, 6721 flow [2024-06-21 20:04:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 20:04:07,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-21 20:04:07,031 INFO L175 Difference]: Start difference. First operand has 283 places, 359 transitions, 5237 flow. Second operand 9 states and 217 transitions. [2024-06-21 20:04:07,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 388 transitions, 6721 flow [2024-06-21 20:04:07,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 388 transitions, 6411 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:07,683 INFO L231 Difference]: Finished difference. Result has 287 places, 365 transitions, 5369 flow [2024-06-21 20:04:07,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5369, PETRI_PLACES=287, PETRI_TRANSITIONS=365} [2024-06-21 20:04:07,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 20:04:07,684 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 365 transitions, 5369 flow [2024-06-21 20:04:07,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:07,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:07,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:07,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:04:07,684 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:07,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1470082885, now seen corresponding path program 5 times [2024-06-21 20:04:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:07,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565696394] [2024-06-21 20:04:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:07,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565696394] [2024-06-21 20:04:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565696394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:07,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:07,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968572604] [2024-06-21 20:04:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:07,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:07,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 365 transitions, 5369 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:07,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:07,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:07,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:08,332 INFO L124 PetriNetUnfolderBase]: 2098/3551 cut-off events. [2024-06-21 20:04:08,333 INFO L125 PetriNetUnfolderBase]: For 250171/250174 co-relation queries the response was YES. [2024-06-21 20:04:08,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24984 conditions, 3551 events. 2098/3551 cut-off events. For 250171/250174 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22031 event pairs, 421 based on Foata normal form. 1/3540 useless extension candidates. Maximal degree in co-relation 24856. Up to 2934 conditions per place. [2024-06-21 20:04:08,369 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 163 changer transitions 0/385 dead transitions. [2024-06-21 20:04:08,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 385 transitions, 6455 flow [2024-06-21 20:04:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:04:08,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:04:08,370 INFO L175 Difference]: Start difference. First operand has 287 places, 365 transitions, 5369 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:04:08,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 385 transitions, 6455 flow [2024-06-21 20:04:08,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 385 transitions, 5946 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:08,994 INFO L231 Difference]: Finished difference. Result has 288 places, 365 transitions, 5192 flow [2024-06-21 20:04:08,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5192, PETRI_PLACES=288, PETRI_TRANSITIONS=365} [2024-06-21 20:04:08,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 20:04:08,995 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 365 transitions, 5192 flow [2024-06-21 20:04:08,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:08,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:08,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:08,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:04:08,995 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:08,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash -277289932, now seen corresponding path program 7 times [2024-06-21 20:04:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:08,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415234584] [2024-06-21 20:04:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:09,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415234584] [2024-06-21 20:04:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415234584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:09,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825960959] [2024-06-21 20:04:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:09,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:09,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:09,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 365 transitions, 5192 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:09,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:09,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:09,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:09,613 INFO L124 PetriNetUnfolderBase]: 2108/3569 cut-off events. [2024-06-21 20:04:09,614 INFO L125 PetriNetUnfolderBase]: For 258288/258288 co-relation queries the response was YES. [2024-06-21 20:04:09,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24843 conditions, 3569 events. 2108/3569 cut-off events. For 258288/258288 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22281 event pairs, 392 based on Foata normal form. 2/3563 useless extension candidates. Maximal degree in co-relation 24715. Up to 2910 conditions per place. [2024-06-21 20:04:09,649 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 106 changer transitions 0/391 dead transitions. [2024-06-21 20:04:09,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 391 transitions, 6366 flow [2024-06-21 20:04:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:04:09,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:04:09,650 INFO L175 Difference]: Start difference. First operand has 288 places, 365 transitions, 5192 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:04:09,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 391 transitions, 6366 flow [2024-06-21 20:04:10,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 391 transitions, 6032 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:10,260 INFO L231 Difference]: Finished difference. Result has 288 places, 369 transitions, 5143 flow [2024-06-21 20:04:10,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4858, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5143, PETRI_PLACES=288, PETRI_TRANSITIONS=369} [2024-06-21 20:04:10,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 20:04:10,260 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 369 transitions, 5143 flow [2024-06-21 20:04:10,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:10,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:10,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:10,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:04:10,261 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:10,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash -941709516, now seen corresponding path program 8 times [2024-06-21 20:04:10,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:10,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512348616] [2024-06-21 20:04:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:10,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:10,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:10,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512348616] [2024-06-21 20:04:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512348616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:10,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441639739] [2024-06-21 20:04:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:10,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:10,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:10,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 369 transitions, 5143 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:10,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:10,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:10,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:10,889 INFO L124 PetriNetUnfolderBase]: 2102/3561 cut-off events. [2024-06-21 20:04:10,890 INFO L125 PetriNetUnfolderBase]: For 258925/258925 co-relation queries the response was YES. [2024-06-21 20:04:10,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24634 conditions, 3561 events. 2102/3561 cut-off events. For 258925/258925 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22238 event pairs, 392 based on Foata normal form. 2/3555 useless extension candidates. Maximal degree in co-relation 24505. Up to 2905 conditions per place. [2024-06-21 20:04:10,929 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 103 changer transitions 0/388 dead transitions. [2024-06-21 20:04:10,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 388 transitions, 6241 flow [2024-06-21 20:04:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:04:10,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:04:10,930 INFO L175 Difference]: Start difference. First operand has 288 places, 369 transitions, 5143 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:04:10,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 388 transitions, 6241 flow [2024-06-21 20:04:11,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 388 transitions, 5894 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:11,596 INFO L231 Difference]: Finished difference. Result has 290 places, 369 transitions, 5009 flow [2024-06-21 20:04:11,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5009, PETRI_PLACES=290, PETRI_TRANSITIONS=369} [2024-06-21 20:04:11,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 20:04:11,597 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 369 transitions, 5009 flow [2024-06-21 20:04:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:11,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:11,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:11,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:04:11,598 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:11,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1481474854, now seen corresponding path program 9 times [2024-06-21 20:04:11,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:11,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213094309] [2024-06-21 20:04:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:11,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:11,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:11,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213094309] [2024-06-21 20:04:11,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213094309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:11,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:11,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455574310] [2024-06-21 20:04:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:11,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:11,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:11,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:11,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 369 transitions, 5009 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:11,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:11,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:11,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:12,253 INFO L124 PetriNetUnfolderBase]: 2138/3632 cut-off events. [2024-06-21 20:04:12,253 INFO L125 PetriNetUnfolderBase]: For 274450/274450 co-relation queries the response was YES. [2024-06-21 20:04:12,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25032 conditions, 3632 events. 2138/3632 cut-off events. For 274450/274450 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 22768 event pairs, 377 based on Foata normal form. 4/3634 useless extension candidates. Maximal degree in co-relation 24902. Up to 3214 conditions per place. [2024-06-21 20:04:12,291 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 52 changer transitions 0/399 dead transitions. [2024-06-21 20:04:12,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 399 transitions, 6173 flow [2024-06-21 20:04:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:04:12,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 20:04:12,292 INFO L175 Difference]: Start difference. First operand has 290 places, 369 transitions, 5009 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:04:12,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 399 transitions, 6173 flow [2024-06-21 20:04:13,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 399 transitions, 5951 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:13,024 INFO L231 Difference]: Finished difference. Result has 294 places, 383 transitions, 5139 flow [2024-06-21 20:04:13,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4797, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5139, PETRI_PLACES=294, PETRI_TRANSITIONS=383} [2024-06-21 20:04:13,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-21 20:04:13,024 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 383 transitions, 5139 flow [2024-06-21 20:04:13,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:13,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:13,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:04:13,025 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:13,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:13,025 INFO L85 PathProgramCache]: Analyzing trace with hash 80018466, now seen corresponding path program 10 times [2024-06-21 20:04:13,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:13,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230724987] [2024-06-21 20:04:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:13,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:13,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230724987] [2024-06-21 20:04:13,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230724987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:13,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:13,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:13,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695823066] [2024-06-21 20:04:13,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:13,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:13,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:13,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 383 transitions, 5139 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:13,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:13,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:13,707 INFO L124 PetriNetUnfolderBase]: 2188/3714 cut-off events. [2024-06-21 20:04:13,707 INFO L125 PetriNetUnfolderBase]: For 292880/292883 co-relation queries the response was YES. [2024-06-21 20:04:13,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26302 conditions, 3714 events. 2188/3714 cut-off events. For 292880/292883 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23377 event pairs, 386 based on Foata normal form. 4/3715 useless extension candidates. Maximal degree in co-relation 26170. Up to 3031 conditions per place. [2024-06-21 20:04:13,746 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 133 changer transitions 0/431 dead transitions. [2024-06-21 20:04:13,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 431 transitions, 6806 flow [2024-06-21 20:04:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:04:13,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 20:04:13,747 INFO L175 Difference]: Start difference. First operand has 294 places, 383 transitions, 5139 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:04:13,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 431 transitions, 6806 flow [2024-06-21 20:04:14,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 431 transitions, 6648 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:14,347 INFO L231 Difference]: Finished difference. Result has 298 places, 402 transitions, 5705 flow [2024-06-21 20:04:14,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5705, PETRI_PLACES=298, PETRI_TRANSITIONS=402} [2024-06-21 20:04:14,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-21 20:04:14,348 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 402 transitions, 5705 flow [2024-06-21 20:04:14,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:14,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:14,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:14,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:04:14,349 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:14,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1205570640, now seen corresponding path program 11 times [2024-06-21 20:04:14,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:14,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449341403] [2024-06-21 20:04:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:14,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449341403] [2024-06-21 20:04:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449341403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:14,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:14,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551531082] [2024-06-21 20:04:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:14,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:14,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 402 transitions, 5705 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:14,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:14,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:14,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:15,074 INFO L124 PetriNetUnfolderBase]: 2176/3697 cut-off events. [2024-06-21 20:04:15,074 INFO L125 PetriNetUnfolderBase]: For 296766/296766 co-relation queries the response was YES. [2024-06-21 20:04:15,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26950 conditions, 3697 events. 2176/3697 cut-off events. For 296766/296766 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23222 event pairs, 377 based on Foata normal form. 4/3699 useless extension candidates. Maximal degree in co-relation 26814. Up to 3021 conditions per place. [2024-06-21 20:04:15,116 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 129 changer transitions 0/433 dead transitions. [2024-06-21 20:04:15,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 433 transitions, 6785 flow [2024-06-21 20:04:15,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 20:04:15,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-21 20:04:15,117 INFO L175 Difference]: Start difference. First operand has 298 places, 402 transitions, 5705 flow. Second operand 8 states and 210 transitions. [2024-06-21 20:04:15,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 433 transitions, 6785 flow [2024-06-21 20:04:16,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 433 transitions, 6651 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:16,041 INFO L231 Difference]: Finished difference. Result has 304 places, 402 transitions, 5858 flow [2024-06-21 20:04:16,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5858, PETRI_PLACES=304, PETRI_TRANSITIONS=402} [2024-06-21 20:04:16,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 20:04:16,042 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 402 transitions, 5858 flow [2024-06-21 20:04:16,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:16,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:16,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:04:16,042 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:16,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash 806382934, now seen corresponding path program 12 times [2024-06-21 20:04:16,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:16,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553898434] [2024-06-21 20:04:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:16,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:16,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:16,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553898434] [2024-06-21 20:04:16,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553898434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:16,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:16,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:16,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2396868] [2024-06-21 20:04:16,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:16,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:16,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:16,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 402 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:16,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:16,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:16,807 INFO L124 PetriNetUnfolderBase]: 2170/3689 cut-off events. [2024-06-21 20:04:16,807 INFO L125 PetriNetUnfolderBase]: For 284674/284674 co-relation queries the response was YES. [2024-06-21 20:04:16,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26745 conditions, 3689 events. 2170/3689 cut-off events. For 284674/284674 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23182 event pairs, 377 based on Foata normal form. 2/3689 useless extension candidates. Maximal degree in co-relation 26608. Up to 3274 conditions per place. [2024-06-21 20:04:16,845 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 384 selfloop transitions, 35 changer transitions 0/427 dead transitions. [2024-06-21 20:04:16,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 427 transitions, 6760 flow [2024-06-21 20:04:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:04:16,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 20:04:16,847 INFO L175 Difference]: Start difference. First operand has 304 places, 402 transitions, 5858 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:04:16,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 427 transitions, 6760 flow [2024-06-21 20:04:17,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 427 transitions, 6392 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:17,662 INFO L231 Difference]: Finished difference. Result has 302 places, 402 transitions, 5574 flow [2024-06-21 20:04:17,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5574, PETRI_PLACES=302, PETRI_TRANSITIONS=402} [2024-06-21 20:04:17,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 20:04:17,662 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 402 transitions, 5574 flow [2024-06-21 20:04:17,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:17,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:17,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:17,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:04:17,663 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:17,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1966205021, now seen corresponding path program 6 times [2024-06-21 20:04:17,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:17,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143518615] [2024-06-21 20:04:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143518615] [2024-06-21 20:04:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143518615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:17,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:17,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347387044] [2024-06-21 20:04:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:17,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:17,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:17,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:17,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 402 transitions, 5574 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:17,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:17,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:17,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:18,411 INFO L124 PetriNetUnfolderBase]: 2167/3670 cut-off events. [2024-06-21 20:04:18,412 INFO L125 PetriNetUnfolderBase]: For 277070/277070 co-relation queries the response was YES. [2024-06-21 20:04:18,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26234 conditions, 3670 events. 2167/3670 cut-off events. For 277070/277070 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23058 event pairs, 389 based on Foata normal form. 1/3666 useless extension candidates. Maximal degree in co-relation 26097. Up to 3032 conditions per place. [2024-06-21 20:04:18,454 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 155 changer transitions 0/422 dead transitions. [2024-06-21 20:04:18,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 422 transitions, 6754 flow [2024-06-21 20:04:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:04:18,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 20:04:18,456 INFO L175 Difference]: Start difference. First operand has 302 places, 402 transitions, 5574 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:04:18,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 422 transitions, 6754 flow [2024-06-21 20:04:19,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 422 transitions, 6622 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:19,337 INFO L231 Difference]: Finished difference. Result has 303 places, 402 transitions, 5758 flow [2024-06-21 20:04:19,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5758, PETRI_PLACES=303, PETRI_TRANSITIONS=402} [2024-06-21 20:04:19,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-21 20:04:19,338 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 402 transitions, 5758 flow [2024-06-21 20:04:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:19,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:04:19,338 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:19,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1199609839, now seen corresponding path program 7 times [2024-06-21 20:04:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280659466] [2024-06-21 20:04:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:19,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:19,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280659466] [2024-06-21 20:04:19,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280659466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:19,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:19,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:19,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201478770] [2024-06-21 20:04:19,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:19,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:19,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:19,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:19,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:19,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 402 transitions, 5758 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:19,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:19,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:19,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:20,084 INFO L124 PetriNetUnfolderBase]: 2172/3679 cut-off events. [2024-06-21 20:04:20,084 INFO L125 PetriNetUnfolderBase]: For 284944/284944 co-relation queries the response was YES. [2024-06-21 20:04:20,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26653 conditions, 3679 events. 2172/3679 cut-off events. For 284944/284944 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23097 event pairs, 389 based on Foata normal form. 1/3675 useless extension candidates. Maximal degree in co-relation 26516. Up to 3038 conditions per place. [2024-06-21 20:04:20,121 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 168 changer transitions 0/425 dead transitions. [2024-06-21 20:04:20,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 425 transitions, 7006 flow [2024-06-21 20:04:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:04:20,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 20:04:20,122 INFO L175 Difference]: Start difference. First operand has 303 places, 402 transitions, 5758 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:04:20,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 425 transitions, 7006 flow [2024-06-21 20:04:20,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 425 transitions, 6786 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:20,902 INFO L231 Difference]: Finished difference. Result has 305 places, 405 transitions, 5938 flow [2024-06-21 20:04:20,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5938, PETRI_PLACES=305, PETRI_TRANSITIONS=405} [2024-06-21 20:04:20,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 20:04:20,907 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 405 transitions, 5938 flow [2024-06-21 20:04:20,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:20,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:20,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:20,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:04:20,907 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:20,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1200055309, now seen corresponding path program 8 times [2024-06-21 20:04:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943339391] [2024-06-21 20:04:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:20,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:20,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943339391] [2024-06-21 20:04:20,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943339391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:20,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:20,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:20,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778612960] [2024-06-21 20:04:20,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:20,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:20,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:21,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:21,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 405 transitions, 5938 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:21,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:21,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:21,628 INFO L124 PetriNetUnfolderBase]: 2169/3675 cut-off events. [2024-06-21 20:04:21,629 INFO L125 PetriNetUnfolderBase]: For 289652/289652 co-relation queries the response was YES. [2024-06-21 20:04:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26696 conditions, 3675 events. 2169/3675 cut-off events. For 289652/289652 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23065 event pairs, 389 based on Foata normal form. 1/3671 useless extension candidates. Maximal degree in co-relation 26558. Up to 3035 conditions per place. [2024-06-21 20:04:21,669 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 168 changer transitions 0/425 dead transitions. [2024-06-21 20:04:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 425 transitions, 7132 flow [2024-06-21 20:04:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:04:21,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:04:21,671 INFO L175 Difference]: Start difference. First operand has 305 places, 405 transitions, 5938 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:04:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 425 transitions, 7132 flow [2024-06-21 20:04:22,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 425 transitions, 6861 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:22,694 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 6009 flow [2024-06-21 20:04:22,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6009, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-06-21 20:04:22,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 20:04:22,694 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 6009 flow [2024-06-21 20:04:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:22,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:22,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:04:22,695 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:22,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1137395903, now seen corresponding path program 9 times [2024-06-21 20:04:22,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776208757] [2024-06-21 20:04:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:22,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:22,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:22,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776208757] [2024-06-21 20:04:22,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776208757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:22,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009681481] [2024-06-21 20:04:22,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:22,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:22,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:22,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:22,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 6009 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:22,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:22,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:22,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:23,467 INFO L124 PetriNetUnfolderBase]: 2166/3671 cut-off events. [2024-06-21 20:04:23,467 INFO L125 PetriNetUnfolderBase]: For 294037/294037 co-relation queries the response was YES. [2024-06-21 20:04:23,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26696 conditions, 3671 events. 2166/3671 cut-off events. For 294037/294037 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23043 event pairs, 389 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 26557. Up to 3032 conditions per place. [2024-06-21 20:04:23,504 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 158 changer transitions 0/425 dead transitions. [2024-06-21 20:04:23,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 425 transitions, 7207 flow [2024-06-21 20:04:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:04:23,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:04:23,506 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 6009 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:04:23,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 425 transitions, 7207 flow [2024-06-21 20:04:24,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 425 transitions, 6616 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:24,484 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5740 flow [2024-06-21 20:04:24,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5740, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-21 20:04:24,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 20:04:24,484 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5740 flow [2024-06-21 20:04:24,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:24,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:24,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:24,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:04:24,485 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:24,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash -597610787, now seen corresponding path program 10 times [2024-06-21 20:04:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:24,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592477983] [2024-06-21 20:04:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:24,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592477983] [2024-06-21 20:04:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592477983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:24,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:24,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556502871] [2024-06-21 20:04:24,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:24,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:24,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:24,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:24,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5740 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:24,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:24,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:24,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:25,169 INFO L124 PetriNetUnfolderBase]: 2163/3672 cut-off events. [2024-06-21 20:04:25,169 INFO L125 PetriNetUnfolderBase]: For 295046/295046 co-relation queries the response was YES. [2024-06-21 20:04:25,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26397 conditions, 3672 events. 2163/3672 cut-off events. For 295046/295046 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23089 event pairs, 377 based on Foata normal form. 1/3671 useless extension candidates. Maximal degree in co-relation 26258. Up to 3255 conditions per place. [2024-06-21 20:04:25,209 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 53 changer transitions 0/422 dead transitions. [2024-06-21 20:04:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 422 transitions, 6768 flow [2024-06-21 20:04:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 20:04:25,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-21 20:04:25,210 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5740 flow. Second operand 9 states and 206 transitions. [2024-06-21 20:04:25,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 422 transitions, 6768 flow [2024-06-21 20:04:26,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 422 transitions, 6146 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 20:04:26,297 INFO L231 Difference]: Finished difference. Result has 306 places, 405 transitions, 5230 flow [2024-06-21 20:04:26,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5118, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5230, PETRI_PLACES=306, PETRI_TRANSITIONS=405} [2024-06-21 20:04:26,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 20:04:26,297 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 405 transitions, 5230 flow [2024-06-21 20:04:26,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:26,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:26,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:26,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:04:26,298 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:26,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1920550865, now seen corresponding path program 11 times [2024-06-21 20:04:26,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:26,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074124104] [2024-06-21 20:04:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:26,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:26,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:26,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074124104] [2024-06-21 20:04:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074124104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:26,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:26,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:26,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308730164] [2024-06-21 20:04:26,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:26,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:26,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 405 transitions, 5230 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:26,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:26,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:26,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:27,062 INFO L124 PetriNetUnfolderBase]: 2160/3668 cut-off events. [2024-06-21 20:04:27,063 INFO L125 PetriNetUnfolderBase]: For 293766/293766 co-relation queries the response was YES. [2024-06-21 20:04:27,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25950 conditions, 3668 events. 2160/3668 cut-off events. For 293766/293766 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23078 event pairs, 377 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 25812. Up to 3252 conditions per place. [2024-06-21 20:04:27,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 53 changer transitions 0/421 dead transitions. [2024-06-21 20:04:27,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 421 transitions, 6094 flow [2024-06-21 20:04:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 20:04:27,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 20:04:27,103 INFO L175 Difference]: Start difference. First operand has 306 places, 405 transitions, 5230 flow. Second operand 9 states and 205 transitions. [2024-06-21 20:04:27,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 421 transitions, 6094 flow [2024-06-21 20:04:28,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 421 transitions, 5954 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:28,053 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5202 flow [2024-06-21 20:04:28,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5202, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-21 20:04:28,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 20:04:28,054 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5202 flow [2024-06-21 20:04:28,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:28,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:28,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:04:28,054 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:28,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1363806639, now seen corresponding path program 12 times [2024-06-21 20:04:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:28,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434713836] [2024-06-21 20:04:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434713836] [2024-06-21 20:04:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434713836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:28,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157051357] [2024-06-21 20:04:28,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:28,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:28,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:28,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5202 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:28,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:28,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:28,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:28,811 INFO L124 PetriNetUnfolderBase]: 2157/3664 cut-off events. [2024-06-21 20:04:28,811 INFO L125 PetriNetUnfolderBase]: For 296915/296915 co-relation queries the response was YES. [2024-06-21 20:04:28,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 3664 events. 2157/3664 cut-off events. For 296915/296915 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23015 event pairs, 377 based on Foata normal form. 1/3663 useless extension candidates. Maximal degree in co-relation 25757. Up to 3107 conditions per place. [2024-06-21 20:04:28,852 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 312 selfloop transitions, 114 changer transitions 0/434 dead transitions. [2024-06-21 20:04:28,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 434 transitions, 6290 flow [2024-06-21 20:04:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 20:04:28,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-21 20:04:28,853 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5202 flow. Second operand 9 states and 221 transitions. [2024-06-21 20:04:28,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 434 transitions, 6290 flow [2024-06-21 20:04:29,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 434 transitions, 6150 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:29,894 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 5300 flow [2024-06-21 20:04:29,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5300, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-06-21 20:04:29,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 20:04:29,895 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 5300 flow [2024-06-21 20:04:29,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:29,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:29,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:29,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:04:29,896 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:29,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1372520739, now seen corresponding path program 13 times [2024-06-21 20:04:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:29,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355012235] [2024-06-21 20:04:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:29,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:29,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355012235] [2024-06-21 20:04:29,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355012235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:29,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:29,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:29,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301976507] [2024-06-21 20:04:29,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:29,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:29,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:30,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:30,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 5300 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:30,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:30,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:30,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:30,673 INFO L124 PetriNetUnfolderBase]: 2162/3673 cut-off events. [2024-06-21 20:04:30,673 INFO L125 PetriNetUnfolderBase]: For 304288/304288 co-relation queries the response was YES. [2024-06-21 20:04:30,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26216 conditions, 3673 events. 2162/3673 cut-off events. For 304288/304288 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23096 event pairs, 377 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 26076. Up to 3113 conditions per place. [2024-06-21 20:04:30,712 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 112 changer transitions 0/437 dead transitions. [2024-06-21 20:04:30,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 437 transitions, 6448 flow [2024-06-21 20:04:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 20:04:30,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 20:04:30,713 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 5300 flow. Second operand 9 states and 222 transitions. [2024-06-21 20:04:30,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 437 transitions, 6448 flow [2024-06-21 20:04:31,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 437 transitions, 6159 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:31,875 INFO L231 Difference]: Finished difference. Result has 308 places, 408 transitions, 5299 flow [2024-06-21 20:04:31,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5019, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5299, PETRI_PLACES=308, PETRI_TRANSITIONS=408} [2024-06-21 20:04:31,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 20:04:31,876 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 408 transitions, 5299 flow [2024-06-21 20:04:31,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:31,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:31,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:04:31,877 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:31,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash 811157213, now seen corresponding path program 14 times [2024-06-21 20:04:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:31,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082563775] [2024-06-21 20:04:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:31,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082563775] [2024-06-21 20:04:31,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082563775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:31,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:31,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151227357] [2024-06-21 20:04:31,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:31,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:31,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:32,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:32,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 408 transitions, 5299 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:32,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:32,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:32,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:32,633 INFO L124 PetriNetUnfolderBase]: 2167/3683 cut-off events. [2024-06-21 20:04:32,633 INFO L125 PetriNetUnfolderBase]: For 304662/304665 co-relation queries the response was YES. [2024-06-21 20:04:32,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26228 conditions, 3683 events. 2167/3683 cut-off events. For 304662/304665 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23190 event pairs, 386 based on Foata normal form. 3/3683 useless extension candidates. Maximal degree in co-relation 26088. Up to 3119 conditions per place. [2024-06-21 20:04:32,673 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 312 selfloop transitions, 116 changer transitions 0/436 dead transitions. [2024-06-21 20:04:32,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 436 transitions, 6435 flow [2024-06-21 20:04:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:04:32,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 20:04:32,674 INFO L175 Difference]: Start difference. First operand has 308 places, 408 transitions, 5299 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:04:32,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 436 transitions, 6435 flow [2024-06-21 20:04:33,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 436 transitions, 6233 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:33,831 INFO L231 Difference]: Finished difference. Result has 309 places, 411 transitions, 5389 flow [2024-06-21 20:04:33,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5389, PETRI_PLACES=309, PETRI_TRANSITIONS=411} [2024-06-21 20:04:33,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 20:04:33,832 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 411 transitions, 5389 flow [2024-06-21 20:04:33,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:33,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:33,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:33,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:04:33,832 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:33,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash 87382795, now seen corresponding path program 15 times [2024-06-21 20:04:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:33,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788257980] [2024-06-21 20:04:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:33,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788257980] [2024-06-21 20:04:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788257980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:33,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:33,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:33,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548238791] [2024-06-21 20:04:33,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:33,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:33,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:33,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 411 transitions, 5389 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:33,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:33,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:34,522 INFO L124 PetriNetUnfolderBase]: 2164/3679 cut-off events. [2024-06-21 20:04:34,523 INFO L125 PetriNetUnfolderBase]: For 301643/301646 co-relation queries the response was YES. [2024-06-21 20:04:34,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26127 conditions, 3679 events. 2164/3679 cut-off events. For 301643/301646 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23197 event pairs, 386 based on Foata normal form. 3/3679 useless extension candidates. Maximal degree in co-relation 25987. Up to 3116 conditions per place. [2024-06-21 20:04:34,564 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 116 changer transitions 0/433 dead transitions. [2024-06-21 20:04:34,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 433 transitions, 6293 flow [2024-06-21 20:04:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 20:04:34,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-21 20:04:34,565 INFO L175 Difference]: Start difference. First operand has 309 places, 411 transitions, 5389 flow. Second operand 9 states and 213 transitions. [2024-06-21 20:04:34,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 433 transitions, 6293 flow [2024-06-21 20:04:35,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 433 transitions, 6071 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:35,766 INFO L231 Difference]: Finished difference. Result has 313 places, 411 transitions, 5405 flow [2024-06-21 20:04:35,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5405, PETRI_PLACES=313, PETRI_TRANSITIONS=411} [2024-06-21 20:04:35,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 20:04:35,767 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 411 transitions, 5405 flow [2024-06-21 20:04:35,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:35,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:35,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:35,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:04:35,768 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:35,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash -613418445, now seen corresponding path program 1 times [2024-06-21 20:04:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:35,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179983981] [2024-06-21 20:04:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:35,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179983981] [2024-06-21 20:04:35,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179983981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:35,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:35,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203616261] [2024-06-21 20:04:35,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:35,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:35,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:35,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:35,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 411 transitions, 5405 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:35,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:35,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:35,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:36,470 INFO L124 PetriNetUnfolderBase]: 2283/3875 cut-off events. [2024-06-21 20:04:36,470 INFO L125 PetriNetUnfolderBase]: For 398147/398147 co-relation queries the response was YES. [2024-06-21 20:04:36,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28545 conditions, 3875 events. 2283/3875 cut-off events. For 398147/398147 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24577 event pairs, 379 based on Foata normal form. 12/3882 useless extension candidates. Maximal degree in co-relation 28404. Up to 2750 conditions per place. [2024-06-21 20:04:36,513 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 193 changer transitions 0/445 dead transitions. [2024-06-21 20:04:36,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 445 transitions, 6637 flow [2024-06-21 20:04:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:04:36,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 20:04:36,514 INFO L175 Difference]: Start difference. First operand has 313 places, 411 transitions, 5405 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:04:36,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 445 transitions, 6637 flow [2024-06-21 20:04:37,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 445 transitions, 6182 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 20:04:37,438 INFO L231 Difference]: Finished difference. Result has 310 places, 415 transitions, 5429 flow [2024-06-21 20:04:37,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4950, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5429, PETRI_PLACES=310, PETRI_TRANSITIONS=415} [2024-06-21 20:04:37,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 20:04:37,440 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 415 transitions, 5429 flow [2024-06-21 20:04:37,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:37,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:37,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:04:37,441 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:37,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 749067885, now seen corresponding path program 2 times [2024-06-21 20:04:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:37,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480330126] [2024-06-21 20:04:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:37,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:37,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480330126] [2024-06-21 20:04:37,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480330126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:37,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:37,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060179972] [2024-06-21 20:04:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:37,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:37,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:37,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 415 transitions, 5429 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:37,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:37,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:38,215 INFO L124 PetriNetUnfolderBase]: 2339/3966 cut-off events. [2024-06-21 20:04:38,216 INFO L125 PetriNetUnfolderBase]: For 424241/424241 co-relation queries the response was YES. [2024-06-21 20:04:38,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29361 conditions, 3966 events. 2339/3966 cut-off events. For 424241/424241 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25283 event pairs, 442 based on Foata normal form. 16/3977 useless extension candidates. Maximal degree in co-relation 29220. Up to 3241 conditions per place. [2024-06-21 20:04:38,260 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 176 changer transitions 0/439 dead transitions. [2024-06-21 20:04:38,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 439 transitions, 6413 flow [2024-06-21 20:04:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:04:38,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:04:38,261 INFO L175 Difference]: Start difference. First operand has 310 places, 415 transitions, 5429 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:04:38,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 439 transitions, 6413 flow [2024-06-21 20:04:39,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 439 transitions, 6164 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:39,229 INFO L231 Difference]: Finished difference. Result has 314 places, 417 transitions, 5588 flow [2024-06-21 20:04:39,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5588, PETRI_PLACES=314, PETRI_TRANSITIONS=417} [2024-06-21 20:04:39,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 20:04:39,229 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 417 transitions, 5588 flow [2024-06-21 20:04:39,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:39,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:39,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:39,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:04:39,230 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:39,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1199747789, now seen corresponding path program 3 times [2024-06-21 20:04:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:39,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175166157] [2024-06-21 20:04:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:39,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175166157] [2024-06-21 20:04:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175166157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:39,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:39,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692865807] [2024-06-21 20:04:39,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:39,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:39,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:39,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 417 transitions, 5588 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:39,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:39,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:39,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:40,032 INFO L124 PetriNetUnfolderBase]: 2379/4030 cut-off events. [2024-06-21 20:04:40,033 INFO L125 PetriNetUnfolderBase]: For 420303/420303 co-relation queries the response was YES. [2024-06-21 20:04:40,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30180 conditions, 4030 events. 2379/4030 cut-off events. For 420303/420303 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25746 event pairs, 438 based on Foata normal form. 12/4037 useless extension candidates. Maximal degree in co-relation 30037. Up to 3245 conditions per place. [2024-06-21 20:04:40,079 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 180 changer transitions 0/444 dead transitions. [2024-06-21 20:04:40,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 444 transitions, 6604 flow [2024-06-21 20:04:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:04:40,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:04:40,080 INFO L175 Difference]: Start difference. First operand has 314 places, 417 transitions, 5588 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:04:40,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 444 transitions, 6604 flow [2024-06-21 20:04:41,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 444 transitions, 6232 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:41,164 INFO L231 Difference]: Finished difference. Result has 316 places, 419 transitions, 5635 flow [2024-06-21 20:04:41,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5635, PETRI_PLACES=316, PETRI_TRANSITIONS=419} [2024-06-21 20:04:41,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-21 20:04:41,165 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 419 transitions, 5635 flow [2024-06-21 20:04:41,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:41,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:41,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:41,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:04:41,165 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:41,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:41,166 INFO L85 PathProgramCache]: Analyzing trace with hash 28126859, now seen corresponding path program 4 times [2024-06-21 20:04:41,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:41,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665580680] [2024-06-21 20:04:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:41,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665580680] [2024-06-21 20:04:41,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665580680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:41,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:41,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394869487] [2024-06-21 20:04:41,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:41,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:41,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:41,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:41,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 419 transitions, 5635 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:41,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:41,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:41,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:42,003 INFO L124 PetriNetUnfolderBase]: 2435/4127 cut-off events. [2024-06-21 20:04:42,004 INFO L125 PetriNetUnfolderBase]: For 446024/446024 co-relation queries the response was YES. [2024-06-21 20:04:42,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30880 conditions, 4127 events. 2435/4127 cut-off events. For 446024/446024 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26459 event pairs, 448 based on Foata normal form. 16/4141 useless extension candidates. Maximal degree in co-relation 30736. Up to 3619 conditions per place. [2024-06-21 20:04:42,049 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 55 changer transitions 0/441 dead transitions. [2024-06-21 20:04:42,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 441 transitions, 6625 flow [2024-06-21 20:04:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:04:42,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 20:04:42,050 INFO L175 Difference]: Start difference. First operand has 316 places, 419 transitions, 5635 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:04:42,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 441 transitions, 6625 flow [2024-06-21 20:04:43,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 441 transitions, 6234 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:43,190 INFO L231 Difference]: Finished difference. Result has 319 places, 421 transitions, 5418 flow [2024-06-21 20:04:43,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5418, PETRI_PLACES=319, PETRI_TRANSITIONS=421} [2024-06-21 20:04:43,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 20:04:43,190 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 421 transitions, 5418 flow [2024-06-21 20:04:43,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:43,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:43,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:43,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:04:43,191 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:43,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1920688815, now seen corresponding path program 5 times [2024-06-21 20:04:43,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:43,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534031022] [2024-06-21 20:04:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:43,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:43,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:43,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534031022] [2024-06-21 20:04:43,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534031022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:43,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:43,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:43,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698327628] [2024-06-21 20:04:43,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:43,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:43,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:43,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:43,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 421 transitions, 5418 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:43,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:43,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:43,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:44,020 INFO L124 PetriNetUnfolderBase]: 2521/4265 cut-off events. [2024-06-21 20:04:44,020 INFO L125 PetriNetUnfolderBase]: For 472679/472679 co-relation queries the response was YES. [2024-06-21 20:04:44,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32221 conditions, 4265 events. 2521/4265 cut-off events. For 472679/472679 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27450 event pairs, 458 based on Foata normal form. 12/4275 useless extension candidates. Maximal degree in co-relation 32076. Up to 3579 conditions per place. [2024-06-21 20:04:44,068 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 62 changer transitions 0/448 dead transitions. [2024-06-21 20:04:44,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 448 transitions, 6648 flow [2024-06-21 20:04:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 20:04:44,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-21 20:04:44,069 INFO L175 Difference]: Start difference. First operand has 319 places, 421 transitions, 5418 flow. Second operand 9 states and 211 transitions. [2024-06-21 20:04:44,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 448 transitions, 6648 flow [2024-06-21 20:04:45,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 448 transitions, 6510 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:45,327 INFO L231 Difference]: Finished difference. Result has 321 places, 424 transitions, 5497 flow [2024-06-21 20:04:45,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5497, PETRI_PLACES=321, PETRI_TRANSITIONS=424} [2024-06-21 20:04:45,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-21 20:04:45,327 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 424 transitions, 5497 flow [2024-06-21 20:04:45,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:45,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:45,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:45,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:04:45,328 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:45,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-21 20:04:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:45,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132303268] [2024-06-21 20:04:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132303268] [2024-06-21 20:04:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132303268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:45,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:45,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930103392] [2024-06-21 20:04:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:45,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:45,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:45,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 424 transitions, 5497 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:45,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:45,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:45,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:46,217 INFO L124 PetriNetUnfolderBase]: 2627/4445 cut-off events. [2024-06-21 20:04:46,217 INFO L125 PetriNetUnfolderBase]: For 524105/524105 co-relation queries the response was YES. [2024-06-21 20:04:46,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34256 conditions, 4445 events. 2627/4445 cut-off events. For 524105/524105 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28777 event pairs, 493 based on Foata normal form. 12/4455 useless extension candidates. Maximal degree in co-relation 34110. Up to 3795 conditions per place. [2024-06-21 20:04:46,270 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 37 changer transitions 0/452 dead transitions. [2024-06-21 20:04:46,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 452 transitions, 6745 flow [2024-06-21 20:04:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:46,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:04:46,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 20:04:46,272 INFO L175 Difference]: Start difference. First operand has 321 places, 424 transitions, 5497 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:04:46,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 452 transitions, 6745 flow [2024-06-21 20:04:47,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 452 transitions, 6637 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:47,765 INFO L231 Difference]: Finished difference. Result has 326 places, 428 transitions, 5577 flow [2024-06-21 20:04:47,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5389, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5577, PETRI_PLACES=326, PETRI_TRANSITIONS=428} [2024-06-21 20:04:47,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-21 20:04:47,765 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 428 transitions, 5577 flow [2024-06-21 20:04:47,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:47,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:47,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:47,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:04:47,766 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:47,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1363796719, now seen corresponding path program 6 times [2024-06-21 20:04:47,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:47,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151556982] [2024-06-21 20:04:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:47,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:47,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:47,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151556982] [2024-06-21 20:04:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151556982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:47,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:47,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:47,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896501386] [2024-06-21 20:04:47,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:47,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:47,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:47,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:47,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 428 transitions, 5577 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:47,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:47,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:47,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:48,725 INFO L124 PetriNetUnfolderBase]: 2670/4526 cut-off events. [2024-06-21 20:04:48,725 INFO L125 PetriNetUnfolderBase]: For 544831/544831 co-relation queries the response was YES. [2024-06-21 20:04:48,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34850 conditions, 4526 events. 2670/4526 cut-off events. For 544831/544831 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29511 event pairs, 517 based on Foata normal form. 16/4540 useless extension candidates. Maximal degree in co-relation 34701. Up to 3782 conditions per place. [2024-06-21 20:04:48,779 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 124 changer transitions 0/462 dead transitions. [2024-06-21 20:04:48,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 462 transitions, 6649 flow [2024-06-21 20:04:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 20:04:48,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-21 20:04:48,780 INFO L175 Difference]: Start difference. First operand has 326 places, 428 transitions, 5577 flow. Second operand 9 states and 223 transitions. [2024-06-21 20:04:48,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 462 transitions, 6649 flow [2024-06-21 20:04:50,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 462 transitions, 6583 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:50,431 INFO L231 Difference]: Finished difference. Result has 331 places, 430 transitions, 5835 flow [2024-06-21 20:04:50,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5835, PETRI_PLACES=331, PETRI_TRANSITIONS=430} [2024-06-21 20:04:50,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 20:04:50,432 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 430 transitions, 5835 flow [2024-06-21 20:04:50,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:50,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:50,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:04:50,432 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:50,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1214159469, now seen corresponding path program 7 times [2024-06-21 20:04:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:50,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220877539] [2024-06-21 20:04:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:50,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:50,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:50,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220877539] [2024-06-21 20:04:50,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220877539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:50,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:50,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:50,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451495879] [2024-06-21 20:04:50,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:50,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:50,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:50,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:50,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:50,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 430 transitions, 5835 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:50,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:50,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:51,402 INFO L124 PetriNetUnfolderBase]: 2723/4612 cut-off events. [2024-06-21 20:04:51,402 INFO L125 PetriNetUnfolderBase]: For 551329/551329 co-relation queries the response was YES. [2024-06-21 20:04:51,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36060 conditions, 4612 events. 2723/4612 cut-off events. For 551329/551329 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30061 event pairs, 438 based on Foata normal form. 12/4622 useless extension candidates. Maximal degree in co-relation 35909. Up to 3473 conditions per place. [2024-06-21 20:04:51,458 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 141 changer transitions 0/471 dead transitions. [2024-06-21 20:04:51,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 471 transitions, 7133 flow [2024-06-21 20:04:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 20:04:51,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233062330623306 [2024-06-21 20:04:51,460 INFO L175 Difference]: Start difference. First operand has 331 places, 430 transitions, 5835 flow. Second operand 9 states and 230 transitions. [2024-06-21 20:04:51,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 471 transitions, 7133 flow [2024-06-21 20:04:53,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 471 transitions, 6859 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:53,378 INFO L231 Difference]: Finished difference. Result has 333 places, 432 transitions, 5913 flow [2024-06-21 20:04:53,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5913, PETRI_PLACES=333, PETRI_TRANSITIONS=432} [2024-06-21 20:04:53,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-21 20:04:53,379 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 432 transitions, 5913 flow [2024-06-21 20:04:53,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:53,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:53,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:53,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:04:53,379 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:53,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1358219137, now seen corresponding path program 2 times [2024-06-21 20:04:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:53,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818159422] [2024-06-21 20:04:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:53,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:53,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818159422] [2024-06-21 20:04:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818159422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:53,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:53,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734323627] [2024-06-21 20:04:53,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:53,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:53,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:53,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 432 transitions, 5913 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:53,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:53,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:53,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:54,377 INFO L124 PetriNetUnfolderBase]: 2905/4905 cut-off events. [2024-06-21 20:04:54,377 INFO L125 PetriNetUnfolderBase]: For 609911/609911 co-relation queries the response was YES. [2024-06-21 20:04:54,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39154 conditions, 4905 events. 2905/4905 cut-off events. For 609911/609911 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32275 event pairs, 534 based on Foata normal form. 12/4915 useless extension candidates. Maximal degree in co-relation 39002. Up to 3999 conditions per place. [2024-06-21 20:04:54,435 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 49 changer transitions 0/469 dead transitions. [2024-06-21 20:04:54,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 469 transitions, 7387 flow [2024-06-21 20:04:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:04:54,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 20:04:54,436 INFO L175 Difference]: Start difference. First operand has 333 places, 432 transitions, 5913 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:04:54,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 469 transitions, 7387 flow [2024-06-21 20:04:56,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 469 transitions, 7166 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:56,247 INFO L231 Difference]: Finished difference. Result has 338 places, 443 transitions, 6084 flow [2024-06-21 20:04:56,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6084, PETRI_PLACES=338, PETRI_TRANSITIONS=443} [2024-06-21 20:04:56,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 20:04:56,248 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 443 transitions, 6084 flow [2024-06-21 20:04:56,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:56,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:56,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:04:56,248 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:56,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1411749217, now seen corresponding path program 3 times [2024-06-21 20:04:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238379754] [2024-06-21 20:04:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:56,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:56,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238379754] [2024-06-21 20:04:56,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238379754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:56,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:56,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936801175] [2024-06-21 20:04:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:56,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:56,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:56,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:56,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:56,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 443 transitions, 6084 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:56,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:56,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:56,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:57,293 INFO L124 PetriNetUnfolderBase]: 3024/5117 cut-off events. [2024-06-21 20:04:57,293 INFO L125 PetriNetUnfolderBase]: For 662720/662720 co-relation queries the response was YES. [2024-06-21 20:04:57,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41892 conditions, 5117 events. 3024/5117 cut-off events. For 662720/662720 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34081 event pairs, 467 based on Foata normal form. 12/5127 useless extension candidates. Maximal degree in co-relation 41736. Up to 3727 conditions per place. [2024-06-21 20:04:57,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 372 selfloop transitions, 103 changer transitions 0/483 dead transitions. [2024-06-21 20:04:57,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 483 transitions, 7460 flow [2024-06-21 20:04:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:04:57,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-21 20:04:57,358 INFO L175 Difference]: Start difference. First operand has 338 places, 443 transitions, 6084 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:04:57,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 483 transitions, 7460 flow [2024-06-21 20:04:59,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 483 transitions, 7368 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:59,805 INFO L231 Difference]: Finished difference. Result has 344 places, 448 transitions, 6392 flow [2024-06-21 20:04:59,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6002, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6392, PETRI_PLACES=344, PETRI_TRANSITIONS=448} [2024-06-21 20:04:59,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-21 20:04:59,806 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 448 transitions, 6392 flow [2024-06-21 20:04:59,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:59,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:59,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:59,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:04:59,807 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:59,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:59,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1677446497, now seen corresponding path program 4 times [2024-06-21 20:04:59,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:59,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634866500] [2024-06-21 20:04:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:59,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:59,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:59,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634866500] [2024-06-21 20:04:59,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634866500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:59,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:59,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:59,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639034342] [2024-06-21 20:04:59,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:59,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:59,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:59,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:04:59,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 448 transitions, 6392 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:59,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:59,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:04:59,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:00,927 INFO L124 PetriNetUnfolderBase]: 3084/5232 cut-off events. [2024-06-21 20:05:00,927 INFO L125 PetriNetUnfolderBase]: For 670756/670759 co-relation queries the response was YES. [2024-06-21 20:05:00,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43430 conditions, 5232 events. 3084/5232 cut-off events. For 670756/670759 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 35118 event pairs, 494 based on Foata normal form. 14/5243 useless extension candidates. Maximal degree in co-relation 43271. Up to 3674 conditions per place. [2024-06-21 20:05:00,985 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 381 selfloop transitions, 97 changer transitions 0/486 dead transitions. [2024-06-21 20:05:00,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 486 transitions, 7964 flow [2024-06-21 20:05:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 20:05:00,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-21 20:05:00,986 INFO L175 Difference]: Start difference. First operand has 344 places, 448 transitions, 6392 flow. Second operand 7 states and 185 transitions. [2024-06-21 20:05:00,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 486 transitions, 7964 flow [2024-06-21 20:05:03,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 486 transitions, 7809 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:03,766 INFO L231 Difference]: Finished difference. Result has 349 places, 454 transitions, 6630 flow [2024-06-21 20:05:03,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6249, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6630, PETRI_PLACES=349, PETRI_TRANSITIONS=454} [2024-06-21 20:05:03,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 20:05:03,766 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 454 transitions, 6630 flow [2024-06-21 20:05:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:03,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:03,767 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] [2024-06-21 20:05:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:05:03,767 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:03,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1491753271, now seen corresponding path program 1 times [2024-06-21 20:05:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:03,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301297450] [2024-06-21 20:05:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:03,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:03,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301297450] [2024-06-21 20:05:03,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301297450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:03,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:03,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:03,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62502186] [2024-06-21 20:05:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:03,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:03,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:03,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:03,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 454 transitions, 6630 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:03,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:03,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:03,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:04,927 INFO L124 PetriNetUnfolderBase]: 3105/5257 cut-off events. [2024-06-21 20:05:04,928 INFO L125 PetriNetUnfolderBase]: For 634806/634806 co-relation queries the response was YES. [2024-06-21 20:05:04,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44413 conditions, 5257 events. 3105/5257 cut-off events. For 634806/634806 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35375 event pairs, 646 based on Foata normal form. 1/5250 useless extension candidates. Maximal degree in co-relation 44250. Up to 4582 conditions per place. [2024-06-21 20:05:04,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 105 changer transitions 0/480 dead transitions. [2024-06-21 20:05:04,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 480 transitions, 7940 flow [2024-06-21 20:05:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:05:04,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:05:04,984 INFO L175 Difference]: Start difference. First operand has 349 places, 454 transitions, 6630 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:05:04,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 480 transitions, 7940 flow [2024-06-21 20:05:07,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 480 transitions, 7801 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 20:05:07,684 INFO L231 Difference]: Finished difference. Result has 354 places, 463 transitions, 6910 flow [2024-06-21 20:05:07,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6491, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6910, PETRI_PLACES=354, PETRI_TRANSITIONS=463} [2024-06-21 20:05:07,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-21 20:05:07,685 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 463 transitions, 6910 flow [2024-06-21 20:05:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:07,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:07,685 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] [2024-06-21 20:05:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:05:07,685 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:07,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash -552932255, now seen corresponding path program 1 times [2024-06-21 20:05:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:07,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325639024] [2024-06-21 20:05:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:07,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325639024] [2024-06-21 20:05:07,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325639024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:07,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:07,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:07,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408357694] [2024-06-21 20:05:07,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:07,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:07,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:07,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 463 transitions, 6910 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:07,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:07,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:07,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:08,780 INFO L124 PetriNetUnfolderBase]: 3118/5289 cut-off events. [2024-06-21 20:05:08,781 INFO L125 PetriNetUnfolderBase]: For 651702/651702 co-relation queries the response was YES. [2024-06-21 20:05:08,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44822 conditions, 5289 events. 3118/5289 cut-off events. For 651702/651702 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35599 event pairs, 627 based on Foata normal form. 1/5288 useless extension candidates. Maximal degree in co-relation 44656. Up to 4703 conditions per place. [2024-06-21 20:05:08,847 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 61 changer transitions 0/497 dead transitions. [2024-06-21 20:05:08,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 497 transitions, 8264 flow [2024-06-21 20:05:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:05:08,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:05:08,848 INFO L175 Difference]: Start difference. First operand has 354 places, 463 transitions, 6910 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:05:08,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 497 transitions, 8264 flow [2024-06-21 20:05:11,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 497 transitions, 8114 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:11,905 INFO L231 Difference]: Finished difference. Result has 358 places, 469 transitions, 7016 flow [2024-06-21 20:05:11,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7016, PETRI_PLACES=358, PETRI_TRANSITIONS=469} [2024-06-21 20:05:11,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-21 20:05:11,906 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 469 transitions, 7016 flow [2024-06-21 20:05:11,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:11,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:11,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:11,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:05:11,907 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:11,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1409757315, now seen corresponding path program 2 times [2024-06-21 20:05:11,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:11,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014413853] [2024-06-21 20:05:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:11,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:12,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:12,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014413853] [2024-06-21 20:05:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014413853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:12,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:12,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892720852] [2024-06-21 20:05:12,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:12,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:12,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:12,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:12,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 469 transitions, 7016 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:12,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:12,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:12,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:13,072 INFO L124 PetriNetUnfolderBase]: 3123/5298 cut-off events. [2024-06-21 20:05:13,073 INFO L125 PetriNetUnfolderBase]: For 653931/653931 co-relation queries the response was YES. [2024-06-21 20:05:13,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45227 conditions, 5298 events. 3123/5298 cut-off events. For 653931/653931 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35666 event pairs, 626 based on Foata normal form. 1/5297 useless extension candidates. Maximal degree in co-relation 45061. Up to 4752 conditions per place. [2024-06-21 20:05:13,142 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 448 selfloop transitions, 43 changer transitions 0/499 dead transitions. [2024-06-21 20:05:13,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 499 transitions, 8116 flow [2024-06-21 20:05:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:05:13,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:05:13,150 INFO L175 Difference]: Start difference. First operand has 358 places, 469 transitions, 7016 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:05:13,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 499 transitions, 8116 flow [2024-06-21 20:05:16,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 499 transitions, 7906 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:16,236 INFO L231 Difference]: Finished difference. Result has 361 places, 472 transitions, 6954 flow [2024-06-21 20:05:16,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6954, PETRI_PLACES=361, PETRI_TRANSITIONS=472} [2024-06-21 20:05:16,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-21 20:05:16,237 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 472 transitions, 6954 flow [2024-06-21 20:05:16,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:16,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:16,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:16,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:05:16,239 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:16,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1232625609, now seen corresponding path program 2 times [2024-06-21 20:05:16,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493276604] [2024-06-21 20:05:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:16,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:16,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:16,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493276604] [2024-06-21 20:05:16,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493276604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:16,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:16,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:16,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830080037] [2024-06-21 20:05:16,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:16,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:16,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 472 transitions, 6954 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:16,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:16,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:16,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:17,353 INFO L124 PetriNetUnfolderBase]: 3141/5325 cut-off events. [2024-06-21 20:05:17,354 INFO L125 PetriNetUnfolderBase]: For 670995/670995 co-relation queries the response was YES. [2024-06-21 20:05:17,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45596 conditions, 5325 events. 3141/5325 cut-off events. For 670995/670995 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35847 event pairs, 627 based on Foata normal form. 1/5324 useless extension candidates. Maximal degree in co-relation 45430. Up to 4729 conditions per place. [2024-06-21 20:05:17,425 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 71 changer transitions 0/512 dead transitions. [2024-06-21 20:05:17,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 512 transitions, 8543 flow [2024-06-21 20:05:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-21 20:05:17,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-21 20:05:17,426 INFO L175 Difference]: Start difference. First operand has 361 places, 472 transitions, 6954 flow. Second operand 10 states and 239 transitions. [2024-06-21 20:05:17,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 512 transitions, 8543 flow [2024-06-21 20:05:20,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 512 transitions, 8423 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:20,408 INFO L231 Difference]: Finished difference. Result has 364 places, 481 transitions, 7111 flow [2024-06-21 20:05:20,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7111, PETRI_PLACES=364, PETRI_TRANSITIONS=481} [2024-06-21 20:05:20,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 20:05:20,409 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 481 transitions, 7111 flow [2024-06-21 20:05:20,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:20,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:20,410 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] [2024-06-21 20:05:20,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:05:20,410 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:20,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1232625795, now seen corresponding path program 3 times [2024-06-21 20:05:20,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:20,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437954906] [2024-06-21 20:05:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:20,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:20,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:20,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437954906] [2024-06-21 20:05:20,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437954906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:20,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:20,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:20,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750214128] [2024-06-21 20:05:20,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:20,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:20,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:20,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:20,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 481 transitions, 7111 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:20,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:20,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:21,610 INFO L124 PetriNetUnfolderBase]: 3146/5334 cut-off events. [2024-06-21 20:05:21,610 INFO L125 PetriNetUnfolderBase]: For 684277/684277 co-relation queries the response was YES. [2024-06-21 20:05:21,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45837 conditions, 5334 events. 3146/5334 cut-off events. For 684277/684277 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35915 event pairs, 626 based on Foata normal form. 1/5333 useless extension candidates. Maximal degree in co-relation 45670. Up to 4781 conditions per place. [2024-06-21 20:05:21,669 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 47 changer transitions 0/514 dead transitions. [2024-06-21 20:05:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 514 transitions, 8253 flow [2024-06-21 20:05:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:05:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:05:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-21 20:05:21,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-21 20:05:21,670 INFO L175 Difference]: Start difference. First operand has 364 places, 481 transitions, 7111 flow. Second operand 11 states and 249 transitions. [2024-06-21 20:05:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 514 transitions, 8253 flow [2024-06-21 20:05:24,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 514 transitions, 8063 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:24,750 INFO L231 Difference]: Finished difference. Result has 369 places, 484 transitions, 7083 flow [2024-06-21 20:05:24,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7083, PETRI_PLACES=369, PETRI_TRANSITIONS=484} [2024-06-21 20:05:24,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-21 20:05:24,768 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 484 transitions, 7083 flow [2024-06-21 20:05:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:24,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:24,768 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] [2024-06-21 20:05:24,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:05:24,768 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:24,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:24,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1232388459, now seen corresponding path program 3 times [2024-06-21 20:05:24,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:24,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812193167] [2024-06-21 20:05:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:24,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:24,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:24,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812193167] [2024-06-21 20:05:24,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812193167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:24,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:24,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757089011] [2024-06-21 20:05:24,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:24,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:24,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:24,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:24,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 484 transitions, 7083 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:24,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:24,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:24,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:25,941 INFO L124 PetriNetUnfolderBase]: 3143/5330 cut-off events. [2024-06-21 20:05:25,942 INFO L125 PetriNetUnfolderBase]: For 692654/692654 co-relation queries the response was YES. [2024-06-21 20:05:25,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45764 conditions, 5330 events. 3143/5330 cut-off events. For 692654/692654 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35910 event pairs, 627 based on Foata normal form. 1/5329 useless extension candidates. Maximal degree in co-relation 45596. Up to 4733 conditions per place. [2024-06-21 20:05:26,016 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 73 changer transitions 0/515 dead transitions. [2024-06-21 20:05:26,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 515 transitions, 8365 flow [2024-06-21 20:05:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:05:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:05:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-21 20:05:26,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-21 20:05:26,017 INFO L175 Difference]: Start difference. First operand has 369 places, 484 transitions, 7083 flow. Second operand 11 states and 254 transitions. [2024-06-21 20:05:26,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 515 transitions, 8365 flow [2024-06-21 20:05:28,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 515 transitions, 8219 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 20:05:28,929 INFO L231 Difference]: Finished difference. Result has 371 places, 484 transitions, 7089 flow [2024-06-21 20:05:28,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6937, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7089, PETRI_PLACES=371, PETRI_TRANSITIONS=484} [2024-06-21 20:05:28,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-21 20:05:28,929 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 484 transitions, 7089 flow [2024-06-21 20:05:28,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:28,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:28,930 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] [2024-06-21 20:05:28,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:05:28,930 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:28,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1498415145, now seen corresponding path program 1 times [2024-06-21 20:05:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117820620] [2024-06-21 20:05:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:28,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:29,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117820620] [2024-06-21 20:05:29,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117820620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:29,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314141519] [2024-06-21 20:05:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:29,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:29,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:29,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 484 transitions, 7089 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:29,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:29,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:29,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:30,095 INFO L124 PetriNetUnfolderBase]: 3223/5472 cut-off events. [2024-06-21 20:05:30,095 INFO L125 PetriNetUnfolderBase]: For 730630/730630 co-relation queries the response was YES. [2024-06-21 20:05:30,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46629 conditions, 5472 events. 3223/5472 cut-off events. For 730630/730630 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 37121 event pairs, 573 based on Foata normal form. 6/5476 useless extension candidates. Maximal degree in co-relation 46460. Up to 4679 conditions per place. [2024-06-21 20:05:30,172 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 461 selfloop transitions, 55 changer transitions 0/524 dead transitions. [2024-06-21 20:05:30,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 524 transitions, 8507 flow [2024-06-21 20:05:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:05:30,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:05:30,173 INFO L175 Difference]: Start difference. First operand has 371 places, 484 transitions, 7089 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:05:30,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 524 transitions, 8507 flow [2024-06-21 20:05:33,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 524 transitions, 8351 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:05:33,313 INFO L231 Difference]: Finished difference. Result has 370 places, 488 transitions, 7136 flow [2024-06-21 20:05:33,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7136, PETRI_PLACES=370, PETRI_TRANSITIONS=488} [2024-06-21 20:05:33,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 20:05:33,314 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 488 transitions, 7136 flow [2024-06-21 20:05:33,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:33,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:33,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:33,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:05:33,314 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:33,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:33,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1314593851, now seen corresponding path program 2 times [2024-06-21 20:05:33,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:33,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318321169] [2024-06-21 20:05:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:33,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:33,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318321169] [2024-06-21 20:05:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318321169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:33,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:33,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:33,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015492579] [2024-06-21 20:05:33,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:33,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:33,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:33,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:33,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:33,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 488 transitions, 7136 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:33,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:33,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:33,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:34,513 INFO L124 PetriNetUnfolderBase]: 3271/5552 cut-off events. [2024-06-21 20:05:34,513 INFO L125 PetriNetUnfolderBase]: For 746675/746675 co-relation queries the response was YES. [2024-06-21 20:05:34,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47455 conditions, 5552 events. 3271/5552 cut-off events. For 746675/746675 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37739 event pairs, 653 based on Foata normal form. 6/5556 useless extension candidates. Maximal degree in co-relation 47284. Up to 4918 conditions per place. [2024-06-21 20:05:34,589 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 48 changer transitions 0/521 dead transitions. [2024-06-21 20:05:34,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 521 transitions, 8320 flow [2024-06-21 20:05:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:05:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 20:05:34,590 INFO L175 Difference]: Start difference. First operand has 370 places, 488 transitions, 7136 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:05:34,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 521 transitions, 8320 flow [2024-06-21 20:05:38,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 521 transitions, 8213 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:38,211 INFO L231 Difference]: Finished difference. Result has 374 places, 490 transitions, 7179 flow [2024-06-21 20:05:38,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7179, PETRI_PLACES=374, PETRI_TRANSITIONS=490} [2024-06-21 20:05:38,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-21 20:05:38,212 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 490 transitions, 7179 flow [2024-06-21 20:05:38,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:38,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:38,212 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] [2024-06-21 20:05:38,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:05:38,212 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:38,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1173546649, now seen corresponding path program 4 times [2024-06-21 20:05:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660381443] [2024-06-21 20:05:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:38,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:38,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660381443] [2024-06-21 20:05:38,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660381443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:38,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:38,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235990237] [2024-06-21 20:05:38,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:38,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:38,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:38,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:38,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:38,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 490 transitions, 7179 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:38,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:38,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:38,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:39,430 INFO L124 PetriNetUnfolderBase]: 3300/5586 cut-off events. [2024-06-21 20:05:39,431 INFO L125 PetriNetUnfolderBase]: For 752099/752099 co-relation queries the response was YES. [2024-06-21 20:05:39,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48093 conditions, 5586 events. 3300/5586 cut-off events. For 752099/752099 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38062 event pairs, 677 based on Foata normal form. 1/5579 useless extension candidates. Maximal degree in co-relation 47920. Up to 4742 conditions per place. [2024-06-21 20:05:39,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 162 changer transitions 0/525 dead transitions. [2024-06-21 20:05:39,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 525 transitions, 9060 flow [2024-06-21 20:05:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:05:39,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:05:39,504 INFO L175 Difference]: Start difference. First operand has 374 places, 490 transitions, 7179 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:05:39,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 525 transitions, 9060 flow [2024-06-21 20:05:42,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 525 transitions, 8958 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:42,464 INFO L231 Difference]: Finished difference. Result has 376 places, 502 transitions, 7604 flow [2024-06-21 20:05:42,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7077, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7604, PETRI_PLACES=376, PETRI_TRANSITIONS=502} [2024-06-21 20:05:42,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 20:05:42,464 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 502 transitions, 7604 flow [2024-06-21 20:05:42,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:42,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:42,465 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] [2024-06-21 20:05:42,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:05:42,465 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:42,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 421330035, now seen corresponding path program 5 times [2024-06-21 20:05:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828580141] [2024-06-21 20:05:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:42,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:42,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:42,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828580141] [2024-06-21 20:05:42,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828580141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:42,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:42,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:42,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123574112] [2024-06-21 20:05:42,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:42,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:42,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:42,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 502 transitions, 7604 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:42,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:42,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:42,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:43,602 INFO L124 PetriNetUnfolderBase]: 3313/5608 cut-off events. [2024-06-21 20:05:43,602 INFO L125 PetriNetUnfolderBase]: For 772163/772163 co-relation queries the response was YES. [2024-06-21 20:05:43,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48737 conditions, 5608 events. 3313/5608 cut-off events. For 772163/772163 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38182 event pairs, 677 based on Foata normal form. 1/5601 useless extension candidates. Maximal degree in co-relation 48563. Up to 4757 conditions per place. [2024-06-21 20:05:43,677 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 165 changer transitions 0/528 dead transitions. [2024-06-21 20:05:43,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 528 transitions, 9398 flow [2024-06-21 20:05:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:05:43,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:05:43,678 INFO L175 Difference]: Start difference. First operand has 376 places, 502 transitions, 7604 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:05:43,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 528 transitions, 9398 flow [2024-06-21 20:05:46,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 528 transitions, 8875 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:46,932 INFO L231 Difference]: Finished difference. Result has 378 places, 508 transitions, 7523 flow [2024-06-21 20:05:46,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7115, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7523, PETRI_PLACES=378, PETRI_TRANSITIONS=508} [2024-06-21 20:05:46,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 20:05:46,933 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 508 transitions, 7523 flow [2024-06-21 20:05:46,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:46,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:46,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:46,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:05:46,933 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:46,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1255514983, now seen corresponding path program 6 times [2024-06-21 20:05:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:46,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51089523] [2024-06-21 20:05:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:46,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:47,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:47,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51089523] [2024-06-21 20:05:47,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51089523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:47,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:47,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866273254] [2024-06-21 20:05:47,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:47,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:47,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:47,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:47,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 508 transitions, 7523 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:47,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:47,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:47,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:48,072 INFO L124 PetriNetUnfolderBase]: 3310/5604 cut-off events. [2024-06-21 20:05:48,073 INFO L125 PetriNetUnfolderBase]: For 779519/779519 co-relation queries the response was YES. [2024-06-21 20:05:48,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48617 conditions, 5604 events. 3310/5604 cut-off events. For 779519/779519 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38210 event pairs, 677 based on Foata normal form. 1/5597 useless extension candidates. Maximal degree in co-relation 48443. Up to 4754 conditions per place. [2024-06-21 20:05:48,147 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 366 selfloop transitions, 157 changer transitions 0/531 dead transitions. [2024-06-21 20:05:48,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 531 transitions, 9231 flow [2024-06-21 20:05:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:05:48,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:05:48,148 INFO L175 Difference]: Start difference. First operand has 378 places, 508 transitions, 7523 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:05:48,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 531 transitions, 9231 flow [2024-06-21 20:05:51,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 531 transitions, 8968 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 20:05:51,438 INFO L231 Difference]: Finished difference. Result has 382 places, 508 transitions, 7580 flow [2024-06-21 20:05:51,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7580, PETRI_PLACES=382, PETRI_TRANSITIONS=508} [2024-06-21 20:05:51,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-21 20:05:51,438 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 508 transitions, 7580 flow [2024-06-21 20:05:51,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:05:51,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:51,439 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] [2024-06-21 20:05:51,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:05:51,439 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:51,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1909289285, now seen corresponding path program 4 times [2024-06-21 20:05:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:51,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502639763] [2024-06-21 20:05:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:51,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:51,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502639763] [2024-06-21 20:05:51,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502639763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:51,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:51,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:51,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748152380] [2024-06-21 20:05:51,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:51,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:51,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:51,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:51,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 508 transitions, 7580 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:51,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:51,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:51,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:52,748 INFO L124 PetriNetUnfolderBase]: 3331/5629 cut-off events. [2024-06-21 20:05:52,749 INFO L125 PetriNetUnfolderBase]: For 807024/807027 co-relation queries the response was YES. [2024-06-21 20:05:52,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49272 conditions, 5629 events. 3331/5629 cut-off events. For 807024/807027 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 38324 event pairs, 735 based on Foata normal form. 1/5609 useless extension candidates. Maximal degree in co-relation 49097. Up to 4403 conditions per place. [2024-06-21 20:05:52,824 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 271 changer transitions 0/549 dead transitions. [2024-06-21 20:05:52,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 549 transitions, 9806 flow [2024-06-21 20:05:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:05:52,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:05:52,825 INFO L175 Difference]: Start difference. First operand has 382 places, 508 transitions, 7580 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:05:52,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 549 transitions, 9806 flow [2024-06-21 20:05:56,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 549 transitions, 9234 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:56,660 INFO L231 Difference]: Finished difference. Result has 382 places, 521 transitions, 7824 flow [2024-06-21 20:05:56,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7008, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7824, PETRI_PLACES=382, PETRI_TRANSITIONS=521} [2024-06-21 20:05:56,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-21 20:05:56,661 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 521 transitions, 7824 flow [2024-06-21 20:05:56,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:56,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:56,661 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] [2024-06-21 20:05:56,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:05:56,661 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:56,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:56,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1727024159, now seen corresponding path program 7 times [2024-06-21 20:05:56,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:56,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715047302] [2024-06-21 20:05:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:56,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:56,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:56,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715047302] [2024-06-21 20:05:56,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715047302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:56,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:56,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557300015] [2024-06-21 20:05:56,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:56,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:56,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:05:56,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 521 transitions, 7824 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:56,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:56,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:05:56,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:57,922 INFO L124 PetriNetUnfolderBase]: 3336/5630 cut-off events. [2024-06-21 20:05:57,922 INFO L125 PetriNetUnfolderBase]: For 826261/826264 co-relation queries the response was YES. [2024-06-21 20:05:57,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49858 conditions, 5630 events. 3336/5630 cut-off events. For 826261/826264 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38259 event pairs, 697 based on Foata normal form. 1/5614 useless extension candidates. Maximal degree in co-relation 49684. Up to 4789 conditions per place. [2024-06-21 20:05:57,995 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 168 changer transitions 0/550 dead transitions. [2024-06-21 20:05:57,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 550 transitions, 9419 flow [2024-06-21 20:05:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:05:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 20:05:57,996 INFO L175 Difference]: Start difference. First operand has 382 places, 521 transitions, 7824 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:05:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 550 transitions, 9419 flow [2024-06-21 20:06:01,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 550 transitions, 9256 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 20:06:01,706 INFO L231 Difference]: Finished difference. Result has 388 places, 524 transitions, 8038 flow [2024-06-21 20:06:01,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8038, PETRI_PLACES=388, PETRI_TRANSITIONS=524} [2024-06-21 20:06:01,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-21 20:06:01,707 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 524 transitions, 8038 flow [2024-06-21 20:06:01,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:01,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:01,707 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] [2024-06-21 20:06:01,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:06:01,707 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:01,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash -65138629, now seen corresponding path program 8 times [2024-06-21 20:06:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805925765] [2024-06-21 20:06:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:01,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805925765] [2024-06-21 20:06:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805925765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:01,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:01,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376353945] [2024-06-21 20:06:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:01,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:01,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:01,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 524 transitions, 8038 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:01,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:01,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:01,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:02,979 INFO L124 PetriNetUnfolderBase]: 3349/5654 cut-off events. [2024-06-21 20:06:02,979 INFO L125 PetriNetUnfolderBase]: For 845063/845066 co-relation queries the response was YES. [2024-06-21 20:06:03,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50193 conditions, 5654 events. 3349/5654 cut-off events. For 845063/845066 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38455 event pairs, 695 based on Foata normal form. 1/5640 useless extension candidates. Maximal degree in co-relation 50016. Up to 4804 conditions per place. [2024-06-21 20:06:03,058 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 174 changer transitions 0/556 dead transitions. [2024-06-21 20:06:03,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 556 transitions, 9902 flow [2024-06-21 20:06:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:06:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:06:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-21 20:06:03,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-21 20:06:03,060 INFO L175 Difference]: Start difference. First operand has 388 places, 524 transitions, 8038 flow. Second operand 10 states and 236 transitions. [2024-06-21 20:06:03,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 556 transitions, 9902 flow [2024-06-21 20:06:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 556 transitions, 9644 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:07,184 INFO L231 Difference]: Finished difference. Result has 393 places, 530 transitions, 8216 flow [2024-06-21 20:06:07,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8216, PETRI_PLACES=393, PETRI_TRANSITIONS=530} [2024-06-21 20:06:07,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-21 20:06:07,185 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 530 transitions, 8216 flow [2024-06-21 20:06:07,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:07,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:07,185 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] [2024-06-21 20:06:07,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:06:07,185 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:07,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1047779959, now seen corresponding path program 9 times [2024-06-21 20:06:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:07,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024893524] [2024-06-21 20:06:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024893524] [2024-06-21 20:06:07,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024893524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:07,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:07,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:07,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882271963] [2024-06-21 20:06:07,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:07,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:07,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:07,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:07,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 530 transitions, 8216 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:07,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:07,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:08,407 INFO L124 PetriNetUnfolderBase]: 3346/5650 cut-off events. [2024-06-21 20:06:08,407 INFO L125 PetriNetUnfolderBase]: For 856279/856282 co-relation queries the response was YES. [2024-06-21 20:06:08,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50259 conditions, 5650 events. 3346/5650 cut-off events. For 856279/856282 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38400 event pairs, 695 based on Foata normal form. 1/5636 useless extension candidates. Maximal degree in co-relation 50080. Up to 4801 conditions per place. [2024-06-21 20:06:08,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 372 selfloop transitions, 173 changer transitions 0/553 dead transitions. [2024-06-21 20:06:08,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 553 transitions, 9782 flow [2024-06-21 20:06:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:06:08,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:06:08,484 INFO L175 Difference]: Start difference. First operand has 393 places, 530 transitions, 8216 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:06:08,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 553 transitions, 9782 flow [2024-06-21 20:06:11,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 553 transitions, 9396 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:11,892 INFO L231 Difference]: Finished difference. Result has 394 places, 530 transitions, 8182 flow [2024-06-21 20:06:11,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7830, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8182, PETRI_PLACES=394, PETRI_TRANSITIONS=530} [2024-06-21 20:06:11,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-21 20:06:11,892 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 530 transitions, 8182 flow [2024-06-21 20:06:11,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:11,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:11,893 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] [2024-06-21 20:06:11,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:06:11,893 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:11,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1047987163, now seen corresponding path program 5 times [2024-06-21 20:06:11,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:11,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819756591] [2024-06-21 20:06:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:11,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:11,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819756591] [2024-06-21 20:06:11,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819756591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:11,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:11,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:11,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177710661] [2024-06-21 20:06:11,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:11,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:12,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:12,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 530 transitions, 8182 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:12,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:12,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:12,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:13,077 INFO L124 PetriNetUnfolderBase]: 3359/5664 cut-off events. [2024-06-21 20:06:13,078 INFO L125 PetriNetUnfolderBase]: For 877373/877376 co-relation queries the response was YES. [2024-06-21 20:06:13,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50622 conditions, 5664 events. 3359/5664 cut-off events. For 877373/877376 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38448 event pairs, 728 based on Foata normal form. 1/5642 useless extension candidates. Maximal degree in co-relation 50442. Up to 4425 conditions per place. [2024-06-21 20:06:13,156 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 277 changer transitions 0/561 dead transitions. [2024-06-21 20:06:13,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 561 transitions, 10296 flow [2024-06-21 20:06:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:06:13,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 20:06:13,157 INFO L175 Difference]: Start difference. First operand has 394 places, 530 transitions, 8182 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:06:13,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 561 transitions, 10296 flow [2024-06-21 20:06:16,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 561 transitions, 9950 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:16,490 INFO L231 Difference]: Finished difference. Result has 395 places, 536 transitions, 8496 flow [2024-06-21 20:06:16,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7836, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8496, PETRI_PLACES=395, PETRI_TRANSITIONS=536} [2024-06-21 20:06:16,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-21 20:06:16,491 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 536 transitions, 8496 flow [2024-06-21 20:06:16,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:16,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:16,491 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] [2024-06-21 20:06:16,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:06:16,493 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:16,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1047601213, now seen corresponding path program 6 times [2024-06-21 20:06:16,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:16,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026785647] [2024-06-21 20:06:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:16,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:16,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026785647] [2024-06-21 20:06:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026785647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:16,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:16,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005076620] [2024-06-21 20:06:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:16,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:16,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 536 transitions, 8496 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:16,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:16,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:16,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:17,874 INFO L124 PetriNetUnfolderBase]: 3356/5660 cut-off events. [2024-06-21 20:06:17,874 INFO L125 PetriNetUnfolderBase]: For 888979/888982 co-relation queries the response was YES. [2024-06-21 20:06:17,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50889 conditions, 5660 events. 3356/5660 cut-off events. For 888979/888982 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38463 event pairs, 728 based on Foata normal form. 1/5638 useless extension candidates. Maximal degree in co-relation 50708. Up to 4423 conditions per place. [2024-06-21 20:06:17,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 279 changer transitions 0/560 dead transitions. [2024-06-21 20:06:17,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 560 transitions, 10300 flow [2024-06-21 20:06:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:06:17,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 20:06:17,946 INFO L175 Difference]: Start difference. First operand has 395 places, 536 transitions, 8496 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:06:17,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 560 transitions, 10300 flow [2024-06-21 20:06:21,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 560 transitions, 9858 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 20:06:21,877 INFO L231 Difference]: Finished difference. Result has 400 places, 536 transitions, 8618 flow [2024-06-21 20:06:21,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8054, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8618, PETRI_PLACES=400, PETRI_TRANSITIONS=536} [2024-06-21 20:06:21,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-21 20:06:21,878 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 536 transitions, 8618 flow [2024-06-21 20:06:21,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:21,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:21,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:21,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:06:21,879 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:21,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1649506053, now seen corresponding path program 10 times [2024-06-21 20:06:21,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:21,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353039927] [2024-06-21 20:06:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:21,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:21,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353039927] [2024-06-21 20:06:21,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353039927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:21,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:21,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:21,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116507740] [2024-06-21 20:06:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:21,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:22,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:22,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 536 transitions, 8618 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:22,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:22,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:22,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:23,203 INFO L124 PetriNetUnfolderBase]: 3369/5707 cut-off events. [2024-06-21 20:06:23,204 INFO L125 PetriNetUnfolderBase]: For 909246/909249 co-relation queries the response was YES. [2024-06-21 20:06:23,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51310 conditions, 5707 events. 3369/5707 cut-off events. For 909246/909249 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 39022 event pairs, 699 based on Foata normal form. 1/5698 useless extension candidates. Maximal degree in co-relation 51128. Up to 4830 conditions per place. [2024-06-21 20:06:23,280 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 179 changer transitions 0/565 dead transitions. [2024-06-21 20:06:23,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 565 transitions, 10734 flow [2024-06-21 20:06:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 20:06:23,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-21 20:06:23,281 INFO L175 Difference]: Start difference. First operand has 400 places, 536 transitions, 8618 flow. Second operand 9 states and 217 transitions. [2024-06-21 20:06:23,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 565 transitions, 10734 flow [2024-06-21 20:06:27,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 565 transitions, 10160 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:27,113 INFO L231 Difference]: Finished difference. Result has 402 places, 542 transitions, 8492 flow [2024-06-21 20:06:27,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8052, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8492, PETRI_PLACES=402, PETRI_TRANSITIONS=542} [2024-06-21 20:06:27,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-21 20:06:27,121 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 542 transitions, 8492 flow [2024-06-21 20:06:27,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:27,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:27,122 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] [2024-06-21 20:06:27,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:06:27,122 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:27,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash -999847077, now seen corresponding path program 7 times [2024-06-21 20:06:27,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:27,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977286038] [2024-06-21 20:06:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:27,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:27,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:27,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977286038] [2024-06-21 20:06:27,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977286038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:27,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:27,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:27,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179537512] [2024-06-21 20:06:27,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:27,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:27,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:27,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:27,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 542 transitions, 8492 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:27,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:27,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:27,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:28,373 INFO L124 PetriNetUnfolderBase]: 3414/5741 cut-off events. [2024-06-21 20:06:28,373 INFO L125 PetriNetUnfolderBase]: For 959124/959127 co-relation queries the response was YES. [2024-06-21 20:06:28,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52275 conditions, 5741 events. 3414/5741 cut-off events. For 959124/959127 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 38981 event pairs, 720 based on Foata normal form. 1/5718 useless extension candidates. Maximal degree in co-relation 52092. Up to 4470 conditions per place. [2024-06-21 20:06:28,451 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 302 changer transitions 0/580 dead transitions. [2024-06-21 20:06:28,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 580 transitions, 10870 flow [2024-06-21 20:06:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:06:28,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 20:06:28,452 INFO L175 Difference]: Start difference. First operand has 402 places, 542 transitions, 8492 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:06:28,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 580 transitions, 10870 flow [2024-06-21 20:06:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 580 transitions, 10496 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:32,623 INFO L231 Difference]: Finished difference. Result has 405 places, 558 transitions, 9038 flow [2024-06-21 20:06:32,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8118, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9038, PETRI_PLACES=405, PETRI_TRANSITIONS=558} [2024-06-21 20:06:32,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-21 20:06:32,623 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 558 transitions, 9038 flow [2024-06-21 20:06:32,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:32,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:32,624 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] [2024-06-21 20:06:32,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:06:32,624 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:32,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1760019429, now seen corresponding path program 8 times [2024-06-21 20:06:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724967496] [2024-06-21 20:06:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:32,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:32,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724967496] [2024-06-21 20:06:32,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724967496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:32,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:32,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:32,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38528610] [2024-06-21 20:06:32,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:32,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:32,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:32,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:32,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 558 transitions, 9038 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:32,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:32,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:32,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:33,932 INFO L124 PetriNetUnfolderBase]: 3424/5792 cut-off events. [2024-06-21 20:06:33,933 INFO L125 PetriNetUnfolderBase]: For 974627/974627 co-relation queries the response was YES. [2024-06-21 20:06:33,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52723 conditions, 5792 events. 3424/5792 cut-off events. For 974627/974627 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39644 event pairs, 649 based on Foata normal form. 1/5791 useless extension candidates. Maximal degree in co-relation 52539. Up to 5188 conditions per place. [2024-06-21 20:06:34,010 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 525 selfloop transitions, 49 changer transitions 0/582 dead transitions. [2024-06-21 20:06:34,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 582 transitions, 10338 flow [2024-06-21 20:06:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:06:34,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 20:06:34,011 INFO L175 Difference]: Start difference. First operand has 405 places, 558 transitions, 9038 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:06:34,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 582 transitions, 10338 flow [2024-06-21 20:06:39,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 582 transitions, 9784 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-21 20:06:39,260 INFO L231 Difference]: Finished difference. Result has 410 places, 564 transitions, 8702 flow [2024-06-21 20:06:39,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8505, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8702, PETRI_PLACES=410, PETRI_TRANSITIONS=564} [2024-06-21 20:06:39,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-21 20:06:39,260 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 564 transitions, 8702 flow [2024-06-21 20:06:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:39,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:39,261 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] [2024-06-21 20:06:39,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:06:39,261 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:39,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1753554999, now seen corresponding path program 9 times [2024-06-21 20:06:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:39,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324065719] [2024-06-21 20:06:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:39,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:39,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324065719] [2024-06-21 20:06:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324065719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:39,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:39,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741799798] [2024-06-21 20:06:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:39,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:39,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 564 transitions, 8702 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:39,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:39,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:39,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:40,631 INFO L124 PetriNetUnfolderBase]: 3429/5766 cut-off events. [2024-06-21 20:06:40,631 INFO L125 PetriNetUnfolderBase]: For 992040/992043 co-relation queries the response was YES. [2024-06-21 20:06:40,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52102 conditions, 5766 events. 3429/5766 cut-off events. For 992040/992043 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39227 event pairs, 720 based on Foata normal form. 1/5743 useless extension candidates. Maximal degree in co-relation 51917. Up to 4482 conditions per place. [2024-06-21 20:06:40,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 303 changer transitions 0/590 dead transitions. [2024-06-21 20:06:40,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 590 transitions, 11072 flow [2024-06-21 20:06:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:06:40,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 20:06:40,709 INFO L175 Difference]: Start difference. First operand has 410 places, 564 transitions, 8702 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:06:40,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 590 transitions, 11072 flow [2024-06-21 20:06:45,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 590 transitions, 10956 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:45,882 INFO L231 Difference]: Finished difference. Result has 413 places, 567 transitions, 9240 flow [2024-06-21 20:06:45,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9240, PETRI_PLACES=413, PETRI_TRANSITIONS=567} [2024-06-21 20:06:45,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-21 20:06:45,883 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 567 transitions, 9240 flow [2024-06-21 20:06:45,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:45,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:45,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:45,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:06:45,884 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:45,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1524306563, now seen corresponding path program 10 times [2024-06-21 20:06:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:45,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952476258] [2024-06-21 20:06:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:45,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:45,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:45,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952476258] [2024-06-21 20:06:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952476258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:45,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71927731] [2024-06-21 20:06:45,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:45,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:46,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:46,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 567 transitions, 9240 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:46,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:46,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:46,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:47,204 INFO L124 PetriNetUnfolderBase]: 3426/5809 cut-off events. [2024-06-21 20:06:47,205 INFO L125 PetriNetUnfolderBase]: For 1002444/1002444 co-relation queries the response was YES. [2024-06-21 20:06:47,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52838 conditions, 5809 events. 3426/5809 cut-off events. For 1002444/1002444 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39834 event pairs, 659 based on Foata normal form. 1/5808 useless extension candidates. Maximal degree in co-relation 52652. Up to 5181 conditions per place. [2024-06-21 20:06:47,284 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 523 selfloop transitions, 57 changer transitions 0/588 dead transitions. [2024-06-21 20:06:47,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 588 transitions, 10674 flow [2024-06-21 20:06:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:06:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:06:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 20:06:47,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-21 20:06:47,285 INFO L175 Difference]: Start difference. First operand has 413 places, 567 transitions, 9240 flow. Second operand 10 states and 227 transitions. [2024-06-21 20:06:47,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 588 transitions, 10674 flow [2024-06-21 20:06:52,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 588 transitions, 10129 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 20:06:52,786 INFO L231 Difference]: Finished difference. Result has 420 places, 567 transitions, 8815 flow [2024-06-21 20:06:52,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8695, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8815, PETRI_PLACES=420, PETRI_TRANSITIONS=567} [2024-06-21 20:06:52,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-21 20:06:52,787 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 567 transitions, 8815 flow [2024-06-21 20:06:52,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:52,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:52,788 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] [2024-06-21 20:06:52,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:06:52,788 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:52,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1672064963, now seen corresponding path program 11 times [2024-06-21 20:06:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:52,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025868501] [2024-06-21 20:06:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:52,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025868501] [2024-06-21 20:06:52,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025868501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:52,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:52,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:52,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258471644] [2024-06-21 20:06:52,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:52,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:52,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:52,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:52,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 567 transitions, 8815 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:52,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:52,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:52,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:54,063 INFO L124 PetriNetUnfolderBase]: 3423/5758 cut-off events. [2024-06-21 20:06:54,063 INFO L125 PetriNetUnfolderBase]: For 1013435/1013438 co-relation queries the response was YES. [2024-06-21 20:06:54,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 5758 events. 3423/5758 cut-off events. For 1013435/1013438 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39251 event pairs, 720 based on Foata normal form. 1/5735 useless extension candidates. Maximal degree in co-relation 51942. Up to 4478 conditions per place. [2024-06-21 20:06:54,144 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 304 changer transitions 0/589 dead transitions. [2024-06-21 20:06:54,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 589 transitions, 10933 flow [2024-06-21 20:06:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:06:54,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 20:06:54,145 INFO L175 Difference]: Start difference. First operand has 420 places, 567 transitions, 8815 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:06:54,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 589 transitions, 10933 flow [2024-06-21 20:06:59,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 589 transitions, 10763 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:59,520 INFO L231 Difference]: Finished difference. Result has 421 places, 567 transitions, 9259 flow [2024-06-21 20:06:59,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8645, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9259, PETRI_PLACES=421, PETRI_TRANSITIONS=567} [2024-06-21 20:06:59,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-21 20:06:59,521 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 567 transitions, 9259 flow [2024-06-21 20:06:59,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:59,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:59,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:59,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:06:59,521 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:59,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:59,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1935763397, now seen corresponding path program 11 times [2024-06-21 20:06:59,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:59,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013590404] [2024-06-21 20:06:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:59,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:59,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:59,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013590404] [2024-06-21 20:06:59,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013590404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:59,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:59,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:59,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943393197] [2024-06-21 20:06:59,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:59,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:59,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:59,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:06:59,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 567 transitions, 9259 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:59,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:59,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:06:59,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:00,796 INFO L124 PetriNetUnfolderBase]: 3420/5777 cut-off events. [2024-06-21 20:07:00,797 INFO L125 PetriNetUnfolderBase]: For 1025602/1025602 co-relation queries the response was YES. [2024-06-21 20:07:00,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 5777 events. 3420/5777 cut-off events. For 1025602/1025602 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39498 event pairs, 638 based on Foata normal form. 1/5776 useless extension candidates. Maximal degree in co-relation 52608. Up to 5209 conditions per place. [2024-06-21 20:07:00,875 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 546 selfloop transitions, 31 changer transitions 0/585 dead transitions. [2024-06-21 20:07:00,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 585 transitions, 10457 flow [2024-06-21 20:07:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:07:00,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-21 20:07:00,876 INFO L175 Difference]: Start difference. First operand has 421 places, 567 transitions, 9259 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:07:00,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 585 transitions, 10457 flow [2024-06-21 20:07:05,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 585 transitions, 9954 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:05,917 INFO L231 Difference]: Finished difference. Result has 423 places, 567 transitions, 8824 flow [2024-06-21 20:07:05,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8756, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8824, PETRI_PLACES=423, PETRI_TRANSITIONS=567} [2024-06-21 20:07:05,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 20:07:05,918 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 567 transitions, 8824 flow [2024-06-21 20:07:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:05,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:05,918 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] [2024-06-21 20:07:05,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:07:05,918 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:05,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1524069413, now seen corresponding path program 12 times [2024-06-21 20:07:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82994387] [2024-06-21 20:07:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:06,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:06,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82994387] [2024-06-21 20:07:06,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82994387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:06,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:06,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:06,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036582382] [2024-06-21 20:07:06,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:06,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:06,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:06,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 567 transitions, 8824 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:06,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:06,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:06,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:07,231 INFO L124 PetriNetUnfolderBase]: 3417/5773 cut-off events. [2024-06-21 20:07:07,231 INFO L125 PetriNetUnfolderBase]: For 1033631/1033631 co-relation queries the response was YES. [2024-06-21 20:07:07,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 5773 events. 3417/5773 cut-off events. For 1033631/1033631 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39363 event pairs, 639 based on Foata normal form. 1/5772 useless extension candidates. Maximal degree in co-relation 51940. Up to 5170 conditions per place. [2024-06-21 20:07:07,316 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 56 changer transitions 0/585 dead transitions. [2024-06-21 20:07:07,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 585 transitions, 10022 flow [2024-06-21 20:07:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:07:07,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 20:07:07,317 INFO L175 Difference]: Start difference. First operand has 423 places, 567 transitions, 8824 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:07:07,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 585 transitions, 10022 flow [2024-06-21 20:07:12,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 585 transitions, 9934 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 20:07:12,671 INFO L231 Difference]: Finished difference. Result has 427 places, 567 transitions, 8854 flow [2024-06-21 20:07:12,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8854, PETRI_PLACES=427, PETRI_TRANSITIONS=567} [2024-06-21 20:07:12,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-21 20:07:12,686 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 567 transitions, 8854 flow [2024-06-21 20:07:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:12,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:12,687 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] [2024-06-21 20:07:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:07:12,687 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:12,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1671678827, now seen corresponding path program 12 times [2024-06-21 20:07:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:12,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079095277] [2024-06-21 20:07:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:12,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:12,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079095277] [2024-06-21 20:07:12,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079095277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:12,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:12,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:12,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257180776] [2024-06-21 20:07:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:12,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:12,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:12,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:12,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 567 transitions, 8854 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:12,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:12,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:12,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:14,028 INFO L124 PetriNetUnfolderBase]: 3414/5760 cut-off events. [2024-06-21 20:07:14,029 INFO L125 PetriNetUnfolderBase]: For 1045311/1045314 co-relation queries the response was YES. [2024-06-21 20:07:14,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52157 conditions, 5760 events. 3414/5760 cut-off events. For 1045311/1045314 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39267 event pairs, 679 based on Foata normal form. 1/5751 useless extension candidates. Maximal degree in co-relation 51967. Up to 4895 conditions per place. [2024-06-21 20:07:14,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 180 changer transitions 0/591 dead transitions. [2024-06-21 20:07:14,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 591 transitions, 10772 flow [2024-06-21 20:07:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:07:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:07:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-21 20:07:14,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-21 20:07:14,102 INFO L175 Difference]: Start difference. First operand has 427 places, 567 transitions, 8854 flow. Second operand 11 states and 254 transitions. [2024-06-21 20:07:14,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 591 transitions, 10772 flow [2024-06-21 20:07:19,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 591 transitions, 10654 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:07:19,624 INFO L231 Difference]: Finished difference. Result has 431 places, 567 transitions, 9102 flow [2024-06-21 20:07:19,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9102, PETRI_PLACES=431, PETRI_TRANSITIONS=567} [2024-06-21 20:07:19,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-21 20:07:19,625 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 567 transitions, 9102 flow [2024-06-21 20:07:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:19,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:19,626 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] [2024-06-21 20:07:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:07:19,626 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:19,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:19,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1523977157, now seen corresponding path program 3 times [2024-06-21 20:07:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:19,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891712590] [2024-06-21 20:07:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891712590] [2024-06-21 20:07:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891712590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:19,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774350063] [2024-06-21 20:07:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:19,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:19,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:19,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 567 transitions, 9102 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:19,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:19,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:19,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:20,971 INFO L124 PetriNetUnfolderBase]: 3434/5817 cut-off events. [2024-06-21 20:07:20,972 INFO L125 PetriNetUnfolderBase]: For 1095060/1095060 co-relation queries the response was YES. [2024-06-21 20:07:21,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52932 conditions, 5817 events. 3434/5817 cut-off events. For 1095060/1095060 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39906 event pairs, 649 based on Foata normal form. 6/5821 useless extension candidates. Maximal degree in co-relation 52741. Up to 5144 conditions per place. [2024-06-21 20:07:21,202 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 537 selfloop transitions, 48 changer transitions 0/593 dead transitions. [2024-06-21 20:07:21,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 593 transitions, 10400 flow [2024-06-21 20:07:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:07:21,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 20:07:21,204 INFO L175 Difference]: Start difference. First operand has 431 places, 567 transitions, 9102 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:07:21,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 593 transitions, 10400 flow [2024-06-21 20:07:27,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 593 transitions, 10085 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 20:07:27,595 INFO L231 Difference]: Finished difference. Result has 430 places, 568 transitions, 8915 flow [2024-06-21 20:07:27,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8787, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8915, PETRI_PLACES=430, PETRI_TRANSITIONS=568} [2024-06-21 20:07:27,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-21 20:07:27,595 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 568 transitions, 8915 flow [2024-06-21 20:07:27,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:27,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:27,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:27,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:07:27,596 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:27,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1047772023, now seen corresponding path program 1 times [2024-06-21 20:07:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:27,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405606477] [2024-06-21 20:07:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:27,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:27,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:27,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405606477] [2024-06-21 20:07:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405606477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:27,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:27,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088788573] [2024-06-21 20:07:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:27,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:27,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:27,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:27,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 568 transitions, 8915 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:27,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:27,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:27,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:28,925 INFO L124 PetriNetUnfolderBase]: 3442/5812 cut-off events. [2024-06-21 20:07:28,925 INFO L125 PetriNetUnfolderBase]: For 1088400/1088403 co-relation queries the response was YES. [2024-06-21 20:07:28,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52827 conditions, 5812 events. 3442/5812 cut-off events. For 1088400/1088403 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39754 event pairs, 666 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 52635. Up to 5145 conditions per place. [2024-06-21 20:07:29,007 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 511 selfloop transitions, 73 changer transitions 0/592 dead transitions. [2024-06-21 20:07:29,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 592 transitions, 10163 flow [2024-06-21 20:07:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:07:29,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 20:07:29,008 INFO L175 Difference]: Start difference. First operand has 430 places, 568 transitions, 8915 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:07:29,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 592 transitions, 10163 flow [2024-06-21 20:07:35,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 592 transitions, 10065 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:35,407 INFO L231 Difference]: Finished difference. Result has 433 places, 570 transitions, 8998 flow [2024-06-21 20:07:35,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8817, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8998, PETRI_PLACES=433, PETRI_TRANSITIONS=570} [2024-06-21 20:07:35,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-21 20:07:35,420 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 570 transitions, 8998 flow [2024-06-21 20:07:35,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:35,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:35,421 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] [2024-06-21 20:07:35,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:07:35,421 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:35,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash -965711339, now seen corresponding path program 1 times [2024-06-21 20:07:35,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:35,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496393773] [2024-06-21 20:07:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:35,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:35,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:35,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496393773] [2024-06-21 20:07:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496393773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:35,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252822487] [2024-06-21 20:07:35,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:35,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:35,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:35,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:35,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 570 transitions, 8998 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:35,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:35,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:35,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:36,718 INFO L124 PetriNetUnfolderBase]: 3450/5817 cut-off events. [2024-06-21 20:07:36,718 INFO L125 PetriNetUnfolderBase]: For 1107027/1107030 co-relation queries the response was YES. [2024-06-21 20:07:36,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53068 conditions, 5817 events. 3450/5817 cut-off events. For 1107027/1107030 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39766 event pairs, 690 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 52876. Up to 4999 conditions per place. [2024-06-21 20:07:36,800 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 182 changer transitions 0/594 dead transitions. [2024-06-21 20:07:36,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 594 transitions, 10276 flow [2024-06-21 20:07:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:07:36,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 20:07:36,801 INFO L175 Difference]: Start difference. First operand has 433 places, 570 transitions, 8998 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:07:36,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 594 transitions, 10276 flow [2024-06-21 20:07:42,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 594 transitions, 10117 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:42,895 INFO L231 Difference]: Finished difference. Result has 435 places, 572 transitions, 9264 flow [2024-06-21 20:07:42,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8839, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9264, PETRI_PLACES=435, PETRI_TRANSITIONS=572} [2024-06-21 20:07:42,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-21 20:07:42,901 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 572 transitions, 9264 flow [2024-06-21 20:07:42,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:42,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:42,902 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] [2024-06-21 20:07:42,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:07:42,902 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:42,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1649498117, now seen corresponding path program 2 times [2024-06-21 20:07:42,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754567437] [2024-06-21 20:07:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:43,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754567437] [2024-06-21 20:07:43,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754567437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:43,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:43,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513355790] [2024-06-21 20:07:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:43,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:43,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 572 transitions, 9264 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:43,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:43,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:43,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:44,721 INFO L124 PetriNetUnfolderBase]: 3458/5850 cut-off events. [2024-06-21 20:07:44,721 INFO L125 PetriNetUnfolderBase]: For 1123158/1123161 co-relation queries the response was YES. [2024-06-21 20:07:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53627 conditions, 5850 events. 3458/5850 cut-off events. For 1123158/1123161 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40118 event pairs, 672 based on Foata normal form. 2/5846 useless extension candidates. Maximal degree in co-relation 53434. Up to 5169 conditions per place. [2024-06-21 20:07:44,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 513 selfloop transitions, 73 changer transitions 0/594 dead transitions. [2024-06-21 20:07:44,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 594 transitions, 10514 flow [2024-06-21 20:07:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 20:07:44,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 20:07:44,794 INFO L175 Difference]: Start difference. First operand has 435 places, 572 transitions, 9264 flow. Second operand 9 states and 207 transitions. [2024-06-21 20:07:44,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 594 transitions, 10514 flow [2024-06-21 20:07:50,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 594 transitions, 10105 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:50,683 INFO L231 Difference]: Finished difference. Result has 438 places, 574 transitions, 9040 flow [2024-06-21 20:07:50,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8855, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9040, PETRI_PLACES=438, PETRI_TRANSITIONS=574} [2024-06-21 20:07:50,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-21 20:07:50,683 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 574 transitions, 9040 flow [2024-06-21 20:07:50,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:50,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:50,684 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] [2024-06-21 20:07:50,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:07:50,684 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:50,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1753954837, now seen corresponding path program 2 times [2024-06-21 20:07:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:50,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904245223] [2024-06-21 20:07:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:50,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904245223] [2024-06-21 20:07:50,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904245223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:50,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:50,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889616039] [2024-06-21 20:07:50,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:50,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:50,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 574 transitions, 9040 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:50,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:50,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:50,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:52,503 INFO L124 PetriNetUnfolderBase]: 3466/5855 cut-off events. [2024-06-21 20:07:52,504 INFO L125 PetriNetUnfolderBase]: For 1141030/1141033 co-relation queries the response was YES. [2024-06-21 20:07:52,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53561 conditions, 5855 events. 3466/5855 cut-off events. For 1141030/1141033 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40119 event pairs, 702 based on Foata normal form. 2/5844 useless extension candidates. Maximal degree in co-relation 53367. Up to 5023 conditions per place. [2024-06-21 20:07:52,575 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 180 changer transitions 0/595 dead transitions. [2024-06-21 20:07:52,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 595 transitions, 10316 flow [2024-06-21 20:07:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:07:52,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:07:52,576 INFO L175 Difference]: Start difference. First operand has 438 places, 574 transitions, 9040 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:07:52,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 595 transitions, 10316 flow [2024-06-21 20:07:58,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 595 transitions, 10153 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:07:58,988 INFO L231 Difference]: Finished difference. Result has 439 places, 576 transitions, 9302 flow [2024-06-21 20:07:58,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8877, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9302, PETRI_PLACES=439, PETRI_TRANSITIONS=576} [2024-06-21 20:07:58,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-21 20:07:58,989 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 576 transitions, 9302 flow [2024-06-21 20:07:58,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:58,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:58,989 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] [2024-06-21 20:07:58,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:07:58,989 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:58,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1981855987, now seen corresponding path program 3 times [2024-06-21 20:07:58,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:58,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768543656] [2024-06-21 20:07:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:58,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:59,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768543656] [2024-06-21 20:07:59,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768543656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:59,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:59,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:59,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612868498] [2024-06-21 20:07:59,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:59,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:59,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:07:59,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 576 transitions, 9302 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:59,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:59,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:07:59,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:00,863 INFO L124 PetriNetUnfolderBase]: 3474/5879 cut-off events. [2024-06-21 20:08:00,864 INFO L125 PetriNetUnfolderBase]: For 1158769/1158772 co-relation queries the response was YES. [2024-06-21 20:08:00,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54159 conditions, 5879 events. 3474/5879 cut-off events. For 1158769/1158772 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40341 event pairs, 714 based on Foata normal form. 2/5868 useless extension candidates. Maximal degree in co-relation 53964. Up to 5035 conditions per place. [2024-06-21 20:08:01,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 182 changer transitions 0/597 dead transitions. [2024-06-21 20:08:01,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 597 transitions, 10586 flow [2024-06-21 20:08:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:08:01,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:08:01,054 INFO L175 Difference]: Start difference. First operand has 439 places, 576 transitions, 9302 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:08:01,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 597 transitions, 10586 flow [2024-06-21 20:08:06,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 597 transitions, 10177 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:06,994 INFO L231 Difference]: Finished difference. Result has 441 places, 578 transitions, 9326 flow [2024-06-21 20:08:06,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8893, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9326, PETRI_PLACES=441, PETRI_TRANSITIONS=578} [2024-06-21 20:08:06,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-21 20:08:06,994 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 578 transitions, 9326 flow [2024-06-21 20:08:06,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:06,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:06,995 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] [2024-06-21 20:08:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:08:06,995 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:06,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:06,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1990426867, now seen corresponding path program 4 times [2024-06-21 20:08:06,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:06,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807064611] [2024-06-21 20:08:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:07,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807064611] [2024-06-21 20:08:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807064611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:07,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424355837] [2024-06-21 20:08:07,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:07,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:07,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:08:07,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 578 transitions, 9326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:07,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:07,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:08:07,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:08,857 INFO L124 PetriNetUnfolderBase]: 3541/5968 cut-off events. [2024-06-21 20:08:08,858 INFO L125 PetriNetUnfolderBase]: For 1260073/1260076 co-relation queries the response was YES. [2024-06-21 20:08:08,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56413 conditions, 5968 events. 3541/5968 cut-off events. For 1260073/1260076 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40930 event pairs, 713 based on Foata normal form. 2/5957 useless extension candidates. Maximal degree in co-relation 56217. Up to 5051 conditions per place. [2024-06-21 20:08:08,931 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 190 changer transitions 0/607 dead transitions. [2024-06-21 20:08:08,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 607 transitions, 10996 flow [2024-06-21 20:08:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:08:08,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:08:08,932 INFO L175 Difference]: Start difference. First operand has 441 places, 578 transitions, 9326 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:08:08,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 607 transitions, 10996 flow [2024-06-21 20:08:15,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 607 transitions, 10579 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:15,768 INFO L231 Difference]: Finished difference. Result has 444 places, 583 transitions, 9457 flow [2024-06-21 20:08:15,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8909, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9457, PETRI_PLACES=444, PETRI_TRANSITIONS=583} [2024-06-21 20:08:15,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-21 20:08:15,775 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 583 transitions, 9457 flow [2024-06-21 20:08:15,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:15,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:15,775 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] [2024-06-21 20:08:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:08:15,776 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:15,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1214016775, now seen corresponding path program 13 times [2024-06-21 20:08:15,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:15,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301323806] [2024-06-21 20:08:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:15,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:15,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301323806] [2024-06-21 20:08:15,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301323806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:15,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:15,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:15,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82341063] [2024-06-21 20:08:15,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:15,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:08:15,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 583 transitions, 9457 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:15,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:15,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:08:15,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:17,662 INFO L124 PetriNetUnfolderBase]: 3538/5976 cut-off events. [2024-06-21 20:08:17,662 INFO L125 PetriNetUnfolderBase]: For 1263060/1263060 co-relation queries the response was YES. [2024-06-21 20:08:17,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56554 conditions, 5976 events. 3538/5976 cut-off events. For 1263060/1263060 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 41092 event pairs, 696 based on Foata normal form. 1/5969 useless extension candidates. Maximal degree in co-relation 56356. Up to 5085 conditions per place. [2024-06-21 20:08:17,741 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 180 changer transitions 0/602 dead transitions. [2024-06-21 20:08:17,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 602 transitions, 10939 flow [2024-06-21 20:08:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:08:17,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:08:17,742 INFO L175 Difference]: Start difference. First operand has 444 places, 583 transitions, 9457 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:08:17,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 602 transitions, 10939 flow [2024-06-21 20:08:25,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 602 transitions, 10634 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 20:08:25,561 INFO L231 Difference]: Finished difference. Result has 448 places, 583 transitions, 9518 flow [2024-06-21 20:08:25,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9152, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9518, PETRI_PLACES=448, PETRI_TRANSITIONS=583} [2024-06-21 20:08:25,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-21 20:08:25,562 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 583 transitions, 9518 flow [2024-06-21 20:08:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:25,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:25,562 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] [2024-06-21 20:08:25,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:08:25,562 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:25,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1771724815, now seen corresponding path program 13 times [2024-06-21 20:08:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:25,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076873855] [2024-06-21 20:08:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:25,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:25,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076873855] [2024-06-21 20:08:25,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076873855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:25,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:25,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:25,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966226779] [2024-06-21 20:08:25,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:25,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:25,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:25,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:08:25,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 583 transitions, 9518 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:25,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:25,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:08:25,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:27,273 INFO L124 PetriNetUnfolderBase]: 3548/5982 cut-off events. [2024-06-21 20:08:27,273 INFO L125 PetriNetUnfolderBase]: For 1288455/1288455 co-relation queries the response was YES. [2024-06-21 20:08:27,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56937 conditions, 5982 events. 3548/5982 cut-off events. For 1288455/1288455 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 41086 event pairs, 693 based on Foata normal form. 2/5976 useless extension candidates. Maximal degree in co-relation 56737. Up to 4673 conditions per place. [2024-06-21 20:08:27,349 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 285 changer transitions 0/610 dead transitions. [2024-06-21 20:08:27,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 610 transitions, 11346 flow [2024-06-21 20:08:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:08:27,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 20:08:27,350 INFO L175 Difference]: Start difference. First operand has 448 places, 583 transitions, 9518 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:08:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 610 transitions, 11346 flow [2024-06-21 20:08:34,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 610 transitions, 10990 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:34,632 INFO L231 Difference]: Finished difference. Result has 450 places, 587 transitions, 9807 flow [2024-06-21 20:08:34,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9162, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9807, PETRI_PLACES=450, PETRI_TRANSITIONS=587} [2024-06-21 20:08:34,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-21 20:08:34,633 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 587 transitions, 9807 flow [2024-06-21 20:08:34,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:34,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:34,633 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] [2024-06-21 20:08:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:08:34,633 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:34,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 826195791, now seen corresponding path program 14 times [2024-06-21 20:08:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777640928] [2024-06-21 20:08:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:34,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:34,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777640928] [2024-06-21 20:08:34,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777640928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:34,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:34,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:34,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690015088] [2024-06-21 20:08:34,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:34,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:34,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:08:34,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 587 transitions, 9807 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:34,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:34,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:08:34,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:36,205 INFO L124 PetriNetUnfolderBase]: 3553/5979 cut-off events. [2024-06-21 20:08:36,205 INFO L125 PetriNetUnfolderBase]: For 1305037/1305037 co-relation queries the response was YES. [2024-06-21 20:08:36,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57268 conditions, 5979 events. 3553/5979 cut-off events. For 1305037/1305037 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 40966 event pairs, 676 based on Foata normal form. 1/5972 useless extension candidates. Maximal degree in co-relation 57068. Up to 5105 conditions per place. [2024-06-21 20:08:36,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 170 changer transitions 0/612 dead transitions. [2024-06-21 20:08:36,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 612 transitions, 11356 flow [2024-06-21 20:08:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:08:36,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 20:08:36,485 INFO L175 Difference]: Start difference. First operand has 450 places, 587 transitions, 9807 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:08:36,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 612 transitions, 11356 flow [2024-06-21 20:08:43,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 612 transitions, 10602 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 20:08:43,523 INFO L231 Difference]: Finished difference. Result has 451 places, 590 transitions, 9434 flow [2024-06-21 20:08:43,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9055, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9434, PETRI_PLACES=451, PETRI_TRANSITIONS=590} [2024-06-21 20:08:43,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-21 20:08:43,524 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 590 transitions, 9434 flow [2024-06-21 20:08:43,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:43,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:43,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:43,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:08:43,525 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:43,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1150937097, now seen corresponding path program 14 times [2024-06-21 20:08:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:43,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661833020] [2024-06-21 20:08:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:43,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:43,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:43,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661833020] [2024-06-21 20:08:43,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661833020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:43,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:43,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847363836] [2024-06-21 20:08:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:43,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:43,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:08:43,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 590 transitions, 9434 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:43,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:43,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:08:43,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:45,137 INFO L124 PetriNetUnfolderBase]: 3563/6009 cut-off events. [2024-06-21 20:08:45,137 INFO L125 PetriNetUnfolderBase]: For 1327257/1327257 co-relation queries the response was YES. [2024-06-21 20:08:45,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56882 conditions, 6009 events. 3563/6009 cut-off events. For 1327257/1327257 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41319 event pairs, 693 based on Foata normal form. 2/6003 useless extension candidates. Maximal degree in co-relation 56682. Up to 4687 conditions per place. [2024-06-21 20:08:45,217 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 328 selfloop transitions, 279 changer transitions 0/615 dead transitions. [2024-06-21 20:08:45,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 615 transitions, 11509 flow [2024-06-21 20:08:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:08:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 20:08:45,218 INFO L175 Difference]: Start difference. First operand has 451 places, 590 transitions, 9434 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:08:45,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 615 transitions, 11509 flow [2024-06-21 20:08:53,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 615 transitions, 11278 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:53,069 INFO L231 Difference]: Finished difference. Result has 453 places, 594 transitions, 9817 flow [2024-06-21 20:08:53,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9203, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9817, PETRI_PLACES=453, PETRI_TRANSITIONS=594} [2024-06-21 20:08:53,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-21 20:08:53,069 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 594 transitions, 9817 flow [2024-06-21 20:08:53,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:53,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:53,070 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] [2024-06-21 20:08:53,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:08:53,070 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:53,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 871984521, now seen corresponding path program 15 times [2024-06-21 20:08:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:53,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513161134] [2024-06-21 20:08:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:53,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:53,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513161134] [2024-06-21 20:08:53,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513161134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:53,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:53,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:53,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023659845] [2024-06-21 20:08:53,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:53,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:53,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:08:53,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 594 transitions, 9817 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:53,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:53,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:08:53,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:54,531 INFO L124 PetriNetUnfolderBase]: 3560/6017 cut-off events. [2024-06-21 20:08:54,531 INFO L125 PetriNetUnfolderBase]: For 1333165/1333165 co-relation queries the response was YES. [2024-06-21 20:08:54,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57230 conditions, 6017 events. 3560/6017 cut-off events. For 1333165/1333165 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41486 event pairs, 696 based on Foata normal form. 1/6010 useless extension candidates. Maximal degree in co-relation 57029. Up to 5116 conditions per place. [2024-06-21 20:08:54,608 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 167 changer transitions 0/614 dead transitions. [2024-06-21 20:08:54,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 614 transitions, 11589 flow [2024-06-21 20:08:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:08:54,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:08:54,609 INFO L175 Difference]: Start difference. First operand has 453 places, 594 transitions, 9817 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:08:54,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 614 transitions, 11589 flow [2024-06-21 20:09:01,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 614 transitions, 11016 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:01,226 INFO L231 Difference]: Finished difference. Result has 455 places, 594 transitions, 9584 flow [2024-06-21 20:09:01,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9244, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9584, PETRI_PLACES=455, PETRI_TRANSITIONS=594} [2024-06-21 20:09:01,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-21 20:09:01,227 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 594 transitions, 9584 flow [2024-06-21 20:09:01,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:01,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:01,227 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] [2024-06-21 20:09:01,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:09:01,227 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:01,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:01,227 INFO L85 PathProgramCache]: Analyzing trace with hash 872163267, now seen corresponding path program 15 times [2024-06-21 20:09:01,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:01,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000805974] [2024-06-21 20:09:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:01,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000805974] [2024-06-21 20:09:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000805974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:01,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:01,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:01,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808100635] [2024-06-21 20:09:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:01,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:01,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:09:01,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 594 transitions, 9584 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:01,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:01,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:09:01,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:02,730 INFO L124 PetriNetUnfolderBase]: 3554/6009 cut-off events. [2024-06-21 20:09:02,730 INFO L125 PetriNetUnfolderBase]: For 1343058/1343058 co-relation queries the response was YES. [2024-06-21 20:09:02,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56793 conditions, 6009 events. 3554/6009 cut-off events. For 1343058/1343058 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41401 event pairs, 703 based on Foata normal form. 2/6003 useless extension candidates. Maximal degree in co-relation 56591. Up to 4680 conditions per place. [2024-06-21 20:09:02,806 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 280 changer transitions 0/614 dead transitions. [2024-06-21 20:09:02,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 614 transitions, 11360 flow [2024-06-21 20:09:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:09:02,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 20:09:02,807 INFO L175 Difference]: Start difference. First operand has 455 places, 594 transitions, 9584 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:09:02,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 614 transitions, 11360 flow [2024-06-21 20:09:11,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 614 transitions, 10996 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:11,185 INFO L231 Difference]: Finished difference. Result has 457 places, 594 transitions, 9787 flow [2024-06-21 20:09:11,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9220, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9787, PETRI_PLACES=457, PETRI_TRANSITIONS=594} [2024-06-21 20:09:11,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-21 20:09:11,186 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 594 transitions, 9787 flow [2024-06-21 20:09:11,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:11,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:11,186 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] [2024-06-21 20:09:11,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:09:11,186 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:11,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1150936911, now seen corresponding path program 16 times [2024-06-21 20:09:11,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:11,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960261581] [2024-06-21 20:09:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:11,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:11,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960261581] [2024-06-21 20:09:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960261581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:11,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:11,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:11,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419366608] [2024-06-21 20:09:11,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:11,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:11,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:11,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:11,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:09:11,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 594 transitions, 9787 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:11,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:11,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:09:11,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:12,708 INFO L124 PetriNetUnfolderBase]: 3551/5981 cut-off events. [2024-06-21 20:09:12,709 INFO L125 PetriNetUnfolderBase]: For 1350730/1350730 co-relation queries the response was YES. [2024-06-21 20:09:12,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57021 conditions, 5981 events. 3551/5981 cut-off events. For 1350730/1350730 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41043 event pairs, 676 based on Foata normal form. 1/5974 useless extension candidates. Maximal degree in co-relation 56819. Up to 5105 conditions per place. [2024-06-21 20:09:12,783 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 168 changer transitions 0/615 dead transitions. [2024-06-21 20:09:12,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 615 transitions, 11311 flow [2024-06-21 20:09:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:09:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:09:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-21 20:09:12,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-21 20:09:12,784 INFO L175 Difference]: Start difference. First operand has 457 places, 594 transitions, 9787 flow. Second operand 10 states and 232 transitions. [2024-06-21 20:09:12,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 615 transitions, 11311 flow [2024-06-21 20:09:19,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 615 transitions, 10672 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:09:19,176 INFO L231 Difference]: Finished difference. Result has 459 places, 594 transitions, 9490 flow [2024-06-21 20:09:19,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9148, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9490, PETRI_PLACES=459, PETRI_TRANSITIONS=594} [2024-06-21 20:09:19,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-21 20:09:19,176 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 594 transitions, 9490 flow [2024-06-21 20:09:19,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:19,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:19,177 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] [2024-06-21 20:09:19,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:09:19,177 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:19,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash 322143625, now seen corresponding path program 17 times [2024-06-21 20:09:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:19,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017303155] [2024-06-21 20:09:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:19,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:19,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017303155] [2024-06-21 20:09:19,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017303155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:19,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:19,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:09:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899662185] [2024-06-21 20:09:19,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:19,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:09:19,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:19,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:09:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:09:19,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:09:19,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 594 transitions, 9490 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:09:19,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:19,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:09:19,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:20,725 INFO L124 PetriNetUnfolderBase]: 3553/6020 cut-off events. [2024-06-21 20:09:20,725 INFO L125 PetriNetUnfolderBase]: For 1363124/1363124 co-relation queries the response was YES. [2024-06-21 20:09:20,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56781 conditions, 6020 events. 3553/6020 cut-off events. For 1363124/1363124 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 41475 event pairs, 678 based on Foata normal form. 2/6020 useless extension candidates. Maximal degree in co-relation 56578. Up to 5386 conditions per place. [2024-06-21 20:09:20,807 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 547 selfloop transitions, 58 changer transitions 0/613 dead transitions. [2024-06-21 20:09:20,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 613 transitions, 11050 flow [2024-06-21 20:09:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:09:20,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 20:09:20,808 INFO L175 Difference]: Start difference. First operand has 459 places, 594 transitions, 9490 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:09:20,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 613 transitions, 11050 flow [2024-06-21 20:09:28,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 613 transitions, 10583 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 20:09:28,446 INFO L231 Difference]: Finished difference. Result has 457 places, 597 transitions, 9199 flow [2024-06-21 20:09:28,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9023, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9199, PETRI_PLACES=457, PETRI_TRANSITIONS=597} [2024-06-21 20:09:28,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-21 20:09:28,449 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 597 transitions, 9199 flow [2024-06-21 20:09:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:09:28,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:28,449 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] [2024-06-21 20:09:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:09:28,450 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:28,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1314973057, now seen corresponding path program 16 times [2024-06-21 20:09:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:28,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998973131] [2024-06-21 20:09:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:28,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:28,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:28,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998973131] [2024-06-21 20:09:28,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998973131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:28,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:28,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:28,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157137273] [2024-06-21 20:09:28,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:28,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:28,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:28,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:09:28,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 597 transitions, 9199 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:28,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:28,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:09:28,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:30,003 INFO L124 PetriNetUnfolderBase]: 3595/6078 cut-off events. [2024-06-21 20:09:30,003 INFO L125 PetriNetUnfolderBase]: For 1416750/1416750 co-relation queries the response was YES. [2024-06-21 20:09:30,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57528 conditions, 6078 events. 3595/6078 cut-off events. For 1416750/1416750 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41878 event pairs, 668 based on Foata normal form. 2/6078 useless extension candidates. Maximal degree in co-relation 57324. Up to 5392 conditions per place. [2024-06-21 20:09:30,082 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 544 selfloop transitions, 78 changer transitions 0/630 dead transitions. [2024-06-21 20:09:30,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 630 transitions, 11521 flow [2024-06-21 20:09:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 20:09:30,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-21 20:09:30,083 INFO L175 Difference]: Start difference. First operand has 457 places, 597 transitions, 9199 flow. Second operand 9 states and 212 transitions. [2024-06-21 20:09:30,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 630 transitions, 11521 flow [2024-06-21 20:09:38,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 630 transitions, 11387 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:38,720 INFO L231 Difference]: Finished difference. Result has 461 places, 611 transitions, 9516 flow [2024-06-21 20:09:38,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9065, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9516, PETRI_PLACES=461, PETRI_TRANSITIONS=611} [2024-06-21 20:09:38,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-21 20:09:38,724 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 611 transitions, 9516 flow [2024-06-21 20:09:38,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:38,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:38,724 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] [2024-06-21 20:09:38,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:09:38,724 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:38,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash 321936235, now seen corresponding path program 18 times [2024-06-21 20:09:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:38,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014250302] [2024-06-21 20:09:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:38,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:38,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:38,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014250302] [2024-06-21 20:09:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014250302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:38,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:38,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:09:38,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587265984] [2024-06-21 20:09:38,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:38,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:09:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:09:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:09:38,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:09:38,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 611 transitions, 9516 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:09:38,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:38,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:09:38,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:40,317 INFO L124 PetriNetUnfolderBase]: 3589/6082 cut-off events. [2024-06-21 20:09:40,317 INFO L125 PetriNetUnfolderBase]: For 1418077/1418077 co-relation queries the response was YES. [2024-06-21 20:09:40,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57514 conditions, 6082 events. 3589/6082 cut-off events. For 1418077/1418077 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42053 event pairs, 678 based on Foata normal form. 2/6082 useless extension candidates. Maximal degree in co-relation 57308. Up to 5438 conditions per place. [2024-06-21 20:09:40,396 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 56 changer transitions 0/626 dead transitions. [2024-06-21 20:09:40,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 626 transitions, 10788 flow [2024-06-21 20:09:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 20:09:40,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 20:09:40,397 INFO L175 Difference]: Start difference. First operand has 461 places, 611 transitions, 9516 flow. Second operand 8 states and 187 transitions. [2024-06-21 20:09:40,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 626 transitions, 10788 flow [2024-06-21 20:09:49,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 626 transitions, 10666 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 20:09:49,649 INFO L231 Difference]: Finished difference. Result has 466 places, 611 transitions, 9516 flow [2024-06-21 20:09:49,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9394, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9516, PETRI_PLACES=466, PETRI_TRANSITIONS=611} [2024-06-21 20:09:49,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-21 20:09:49,650 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 611 transitions, 9516 flow [2024-06-21 20:09:49,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:09:49,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:49,650 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] [2024-06-21 20:09:49,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:09:49,650 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:49,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash 321936421, now seen corresponding path program 17 times [2024-06-21 20:09:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:49,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464236551] [2024-06-21 20:09:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:49,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:49,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464236551] [2024-06-21 20:09:49,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464236551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:49,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:49,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:49,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340092287] [2024-06-21 20:09:49,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:49,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:49,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:49,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:09:49,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 611 transitions, 9516 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:49,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:49,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:09:49,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:51,389 INFO L124 PetriNetUnfolderBase]: 3583/6090 cut-off events. [2024-06-21 20:09:51,389 INFO L125 PetriNetUnfolderBase]: For 1419734/1419734 co-relation queries the response was YES. [2024-06-21 20:09:51,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57378 conditions, 6090 events. 3583/6090 cut-off events. For 1419734/1419734 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42196 event pairs, 690 based on Foata normal form. 2/6090 useless extension candidates. Maximal degree in co-relation 57170. Up to 5382 conditions per place. [2024-06-21 20:09:51,465 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 541 selfloop transitions, 80 changer transitions 0/629 dead transitions. [2024-06-21 20:09:51,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 629 transitions, 11336 flow [2024-06-21 20:09:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 20:09:51,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-21 20:09:51,467 INFO L175 Difference]: Start difference. First operand has 466 places, 611 transitions, 9516 flow. Second operand 9 states and 210 transitions. [2024-06-21 20:09:51,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 629 transitions, 11336 flow [2024-06-21 20:09:59,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 629 transitions, 11182 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:09:59,659 INFO L231 Difference]: Finished difference. Result has 468 places, 611 transitions, 9529 flow [2024-06-21 20:09:59,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9362, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9529, PETRI_PLACES=468, PETRI_TRANSITIONS=611} [2024-06-21 20:09:59,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-21 20:09:59,660 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 611 transitions, 9529 flow [2024-06-21 20:09:59,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:59,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:59,661 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] [2024-06-21 20:09:59,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:09:59,661 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:59,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:59,661 INFO L85 PathProgramCache]: Analyzing trace with hash 401524193, now seen corresponding path program 18 times [2024-06-21 20:09:59,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:59,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303001819] [2024-06-21 20:09:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:59,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:59,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:59,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303001819] [2024-06-21 20:09:59,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303001819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:59,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:59,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003234525] [2024-06-21 20:09:59,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:59,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:59,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:59,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:09:59,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 611 transitions, 9529 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:59,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:59,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:09:59,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:01,334 INFO L124 PetriNetUnfolderBase]: 3617/6123 cut-off events. [2024-06-21 20:10:01,334 INFO L125 PetriNetUnfolderBase]: For 1470975/1470975 co-relation queries the response was YES. [2024-06-21 20:10:01,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58311 conditions, 6123 events. 3617/6123 cut-off events. For 1470975/1470975 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42328 event pairs, 670 based on Foata normal form. 2/6123 useless extension candidates. Maximal degree in co-relation 58102. Up to 5069 conditions per place. [2024-06-21 20:10:01,418 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 454 selfloop transitions, 193 changer transitions 0/655 dead transitions. [2024-06-21 20:10:01,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 655 transitions, 11949 flow [2024-06-21 20:10:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:10:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:10:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-21 20:10:01,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-21 20:10:01,431 INFO L175 Difference]: Start difference. First operand has 468 places, 611 transitions, 9529 flow. Second operand 9 states and 229 transitions. [2024-06-21 20:10:01,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 655 transitions, 11949 flow [2024-06-21 20:10:08,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 655 transitions, 11803 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:10:08,983 INFO L231 Difference]: Finished difference. Result has 471 places, 624 transitions, 10144 flow [2024-06-21 20:10:08,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10144, PETRI_PLACES=471, PETRI_TRANSITIONS=624} [2024-06-21 20:10:08,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-21 20:10:08,985 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 624 transitions, 10144 flow [2024-06-21 20:10:08,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:09,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:09,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:09,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:10:09,004 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:09,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1281807379, now seen corresponding path program 19 times [2024-06-21 20:10:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:09,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298180902] [2024-06-21 20:10:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:09,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:09,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298180902] [2024-06-21 20:10:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298180902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:09,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:09,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:10:09,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46707549] [2024-06-21 20:10:09,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:09,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:10:09,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:10:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:10:09,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:10:09,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 624 transitions, 10144 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:10:09,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:09,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:10:09,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:10,674 INFO L124 PetriNetUnfolderBase]: 3619/6112 cut-off events. [2024-06-21 20:10:10,674 INFO L125 PetriNetUnfolderBase]: For 1488780/1488780 co-relation queries the response was YES. [2024-06-21 20:10:10,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59019 conditions, 6112 events. 3619/6112 cut-off events. For 1488780/1488780 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42154 event pairs, 658 based on Foata normal form. 2/6112 useless extension candidates. Maximal degree in co-relation 58808. Up to 5220 conditions per place. [2024-06-21 20:10:10,756 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 492 selfloop transitions, 158 changer transitions 0/658 dead transitions. [2024-06-21 20:10:10,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 658 transitions, 11856 flow [2024-06-21 20:10:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:10:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:10:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 20:10:10,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-21 20:10:10,757 INFO L175 Difference]: Start difference. First operand has 471 places, 624 transitions, 10144 flow. Second operand 8 states and 209 transitions. [2024-06-21 20:10:10,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 658 transitions, 11856 flow [2024-06-21 20:10:18,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 658 transitions, 11718 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 20:10:18,717 INFO L231 Difference]: Finished difference. Result has 475 places, 627 transitions, 10409 flow [2024-06-21 20:10:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10008, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10409, PETRI_PLACES=475, PETRI_TRANSITIONS=627} [2024-06-21 20:10:18,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-21 20:10:18,717 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 627 transitions, 10409 flow [2024-06-21 20:10:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:10:18,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:18,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:18,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:10:18,718 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:18,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:18,718 INFO L85 PathProgramCache]: Analyzing trace with hash -101251227, now seen corresponding path program 19 times [2024-06-21 20:10:18,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:18,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410442137] [2024-06-21 20:10:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:18,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410442137] [2024-06-21 20:10:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410442137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:18,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:18,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916289685] [2024-06-21 20:10:18,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:18,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:18,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:18,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:10:18,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 627 transitions, 10409 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:18,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:18,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:10:18,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:20,348 INFO L124 PetriNetUnfolderBase]: 3632/6151 cut-off events. [2024-06-21 20:10:20,349 INFO L125 PetriNetUnfolderBase]: For 1490540/1490543 co-relation queries the response was YES. [2024-06-21 20:10:20,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59703 conditions, 6151 events. 3632/6151 cut-off events. For 1490540/1490543 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42577 event pairs, 679 based on Foata normal form. 3/6151 useless extension candidates. Maximal degree in co-relation 59491. Up to 5083 conditions per place. [2024-06-21 20:10:20,428 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 440 selfloop transitions, 210 changer transitions 0/658 dead transitions. [2024-06-21 20:10:20,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 658 transitions, 12996 flow [2024-06-21 20:10:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:10:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:10:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:10:20,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 20:10:20,429 INFO L175 Difference]: Start difference. First operand has 475 places, 627 transitions, 10409 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:10:20,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 658 transitions, 12996 flow [2024-06-21 20:10:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 658 transitions, 12642 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 20:10:28,870 INFO L231 Difference]: Finished difference. Result has 475 places, 633 transitions, 10636 flow [2024-06-21 20:10:28,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10071, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10636, PETRI_PLACES=475, PETRI_TRANSITIONS=633} [2024-06-21 20:10:28,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-21 20:10:28,870 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 633 transitions, 10636 flow [2024-06-21 20:10:28,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:28,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:28,871 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] [2024-06-21 20:10:28,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:10:28,871 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:28,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1282014769, now seen corresponding path program 20 times [2024-06-21 20:10:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338759424] [2024-06-21 20:10:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:28,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:28,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:28,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338759424] [2024-06-21 20:10:28,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338759424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:28,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:28,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:10:28,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181744010] [2024-06-21 20:10:28,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:28,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:10:28,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:10:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:10:28,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:10:28,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 633 transitions, 10636 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:10:28,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:28,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:10:28,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:30,557 INFO L124 PetriNetUnfolderBase]: 3634/6151 cut-off events. [2024-06-21 20:10:30,557 INFO L125 PetriNetUnfolderBase]: For 1468885/1468885 co-relation queries the response was YES. [2024-06-21 20:10:30,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59578 conditions, 6151 events. 3634/6151 cut-off events. For 1468885/1468885 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42549 event pairs, 668 based on Foata normal form. 2/6151 useless extension candidates. Maximal degree in co-relation 59367. Up to 5241 conditions per place. [2024-06-21 20:10:30,790 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 154 changer transitions 0/667 dead transitions. [2024-06-21 20:10:30,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 667 transitions, 12370 flow [2024-06-21 20:10:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:10:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:10:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 20:10:30,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-21 20:10:30,791 INFO L175 Difference]: Start difference. First operand has 475 places, 633 transitions, 10636 flow. Second operand 8 states and 209 transitions. [2024-06-21 20:10:30,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 667 transitions, 12370 flow [2024-06-21 20:10:38,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 667 transitions, 11732 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 20:10:38,667 INFO L231 Difference]: Finished difference. Result has 478 places, 636 transitions, 10399 flow [2024-06-21 20:10:38,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10001, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10399, PETRI_PLACES=478, PETRI_TRANSITIONS=636} [2024-06-21 20:10:38,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-21 20:10:38,668 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 636 transitions, 10399 flow [2024-06-21 20:10:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:10:38,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:38,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:38,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:10:38,668 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:38,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash 401138243, now seen corresponding path program 20 times [2024-06-21 20:10:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:38,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339679700] [2024-06-21 20:10:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:38,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:38,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:38,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339679700] [2024-06-21 20:10:38,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339679700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:38,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:38,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302872240] [2024-06-21 20:10:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:38,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:38,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:38,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:38,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:38,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:10:38,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 636 transitions, 10399 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:38,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:10:38,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:40,287 INFO L124 PetriNetUnfolderBase]: 3628/6155 cut-off events. [2024-06-21 20:10:40,287 INFO L125 PetriNetUnfolderBase]: For 1466543/1466543 co-relation queries the response was YES. [2024-06-21 20:10:40,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59213 conditions, 6155 events. 3628/6155 cut-off events. For 1466543/1466543 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42716 event pairs, 678 based on Foata normal form. 2/6155 useless extension candidates. Maximal degree in co-relation 59001. Up to 5082 conditions per place. [2024-06-21 20:10:40,584 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 452 selfloop transitions, 209 changer transitions 0/669 dead transitions. [2024-06-21 20:10:40,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 669 transitions, 12347 flow [2024-06-21 20:10:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:10:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:10:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 20:10:40,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:10:40,585 INFO L175 Difference]: Start difference. First operand has 478 places, 636 transitions, 10399 flow. Second operand 9 states and 231 transitions. [2024-06-21 20:10:40,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 669 transitions, 12347 flow [2024-06-21 20:10:48,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 669 transitions, 12070 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 20:10:48,096 INFO L231 Difference]: Finished difference. Result has 480 places, 636 transitions, 10560 flow [2024-06-21 20:10:48,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10130, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10560, PETRI_PLACES=480, PETRI_TRANSITIONS=636} [2024-06-21 20:10:48,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-21 20:10:48,097 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 636 transitions, 10560 flow [2024-06-21 20:10:48,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:48,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:48,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:48,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:10:48,097 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:48,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -623936031, now seen corresponding path program 21 times [2024-06-21 20:10:48,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:48,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113999952] [2024-06-21 20:10:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:48,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:48,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113999952] [2024-06-21 20:10:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113999952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:48,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:48,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364456305] [2024-06-21 20:10:48,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:48,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:48,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:48,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:48,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:48,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:10:48,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 636 transitions, 10560 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:48,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:48,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:10:48,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:49,795 INFO L124 PetriNetUnfolderBase]: 3633/6141 cut-off events. [2024-06-21 20:10:49,795 INFO L125 PetriNetUnfolderBase]: For 1442703/1442706 co-relation queries the response was YES. [2024-06-21 20:10:49,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59270 conditions, 6141 events. 3633/6141 cut-off events. For 1442703/1442706 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42469 event pairs, 667 based on Foata normal form. 3/6141 useless extension candidates. Maximal degree in co-relation 59059. Up to 5086 conditions per place. [2024-06-21 20:10:49,874 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 216 changer transitions 0/667 dead transitions. [2024-06-21 20:10:49,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 667 transitions, 13081 flow [2024-06-21 20:10:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:10:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:10:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:10:49,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:10:49,875 INFO L175 Difference]: Start difference. First operand has 480 places, 636 transitions, 10560 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:10:49,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 667 transitions, 13081 flow [2024-06-21 20:10:58,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 667 transitions, 12678 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:10:58,098 INFO L231 Difference]: Finished difference. Result has 480 places, 639 transitions, 10658 flow [2024-06-21 20:10:58,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10169, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10658, PETRI_PLACES=480, PETRI_TRANSITIONS=639} [2024-06-21 20:10:58,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-21 20:10:58,098 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 639 transitions, 10658 flow [2024-06-21 20:10:58,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:58,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:58,099 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] [2024-06-21 20:10:58,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:10:58,099 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:58,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash -400796481, now seen corresponding path program 22 times [2024-06-21 20:10:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:58,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429909343] [2024-06-21 20:10:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429909343] [2024-06-21 20:10:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429909343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:58,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:58,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899487185] [2024-06-21 20:10:58,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:58,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:10:58,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 639 transitions, 10658 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:58,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:58,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:10:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:59,908 INFO L124 PetriNetUnfolderBase]: 3643/6168 cut-off events. [2024-06-21 20:10:59,908 INFO L125 PetriNetUnfolderBase]: For 1439883/1439883 co-relation queries the response was YES. [2024-06-21 20:10:59,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59432 conditions, 6168 events. 3643/6168 cut-off events. For 1439883/1439883 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 42712 event pairs, 668 based on Foata normal form. 1/6167 useless extension candidates. Maximal degree in co-relation 59221. Up to 5532 conditions per place. [2024-06-21 20:10:59,989 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 619 selfloop transitions, 35 changer transitions 0/662 dead transitions. [2024-06-21 20:10:59,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 662 transitions, 12115 flow [2024-06-21 20:10:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:10:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:10:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:10:59,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-21 20:10:59,990 INFO L175 Difference]: Start difference. First operand has 480 places, 639 transitions, 10658 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:10:59,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 662 transitions, 12115 flow [2024-06-21 20:11:08,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 662 transitions, 11501 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:11:08,368 INFO L231 Difference]: Finished difference. Result has 480 places, 645 transitions, 10233 flow [2024-06-21 20:11:08,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10065, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10233, PETRI_PLACES=480, PETRI_TRANSITIONS=645} [2024-06-21 20:11:08,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-21 20:11:08,368 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 645 transitions, 10233 flow [2024-06-21 20:11:08,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:08,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:08,369 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] [2024-06-21 20:11:08,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:11:08,369 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:08,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1958284139, now seen corresponding path program 23 times [2024-06-21 20:11:08,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:08,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015734442] [2024-06-21 20:11:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:08,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:08,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015734442] [2024-06-21 20:11:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015734442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:08,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:08,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:08,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073784206] [2024-06-21 20:11:08,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:08,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:08,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:11:08,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 645 transitions, 10233 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:08,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:08,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:11:08,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:10,147 INFO L124 PetriNetUnfolderBase]: 3640/6181 cut-off events. [2024-06-21 20:11:10,148 INFO L125 PetriNetUnfolderBase]: For 1444927/1444930 co-relation queries the response was YES. [2024-06-21 20:11:10,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58852 conditions, 6181 events. 3640/6181 cut-off events. For 1444927/1444930 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43016 event pairs, 689 based on Foata normal form. 3/6181 useless extension candidates. Maximal degree in co-relation 58640. Up to 5092 conditions per place. [2024-06-21 20:11:10,232 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 224 changer transitions 0/675 dead transitions. [2024-06-21 20:11:10,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 675 transitions, 12457 flow [2024-06-21 20:11:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:11:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:11:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 20:11:10,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:11:10,233 INFO L175 Difference]: Start difference. First operand has 480 places, 645 transitions, 10233 flow. Second operand 8 states and 208 transitions. [2024-06-21 20:11:10,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 675 transitions, 12457 flow [2024-06-21 20:11:16,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 675 transitions, 12345 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 20:11:16,709 INFO L231 Difference]: Finished difference. Result has 484 places, 645 transitions, 10575 flow [2024-06-21 20:11:16,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10121, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10575, PETRI_PLACES=484, PETRI_TRANSITIONS=645} [2024-06-21 20:11:16,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-21 20:11:16,710 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 645 transitions, 10575 flow [2024-06-21 20:11:16,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:16,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:16,720 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] [2024-06-21 20:11:16,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:11:16,720 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:16,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -771931767, now seen corresponding path program 21 times [2024-06-21 20:11:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:16,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637623102] [2024-06-21 20:11:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:16,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:16,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637623102] [2024-06-21 20:11:16,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637623102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:16,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:16,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:11:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15304773] [2024-06-21 20:11:16,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:16,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:11:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:11:16,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:11:16,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:11:16,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 645 transitions, 10575 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:11:16,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:16,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:11:16,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:18,408 INFO L124 PetriNetUnfolderBase]: 3634/6180 cut-off events. [2024-06-21 20:11:18,408 INFO L125 PetriNetUnfolderBase]: For 1454921/1454921 co-relation queries the response was YES. [2024-06-21 20:11:18,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59165 conditions, 6180 events. 3634/6180 cut-off events. For 1454921/1454921 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 43045 event pairs, 688 based on Foata normal form. 2/6180 useless extension candidates. Maximal degree in co-relation 58952. Up to 5403 conditions per place. [2024-06-21 20:11:18,489 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 581 selfloop transitions, 80 changer transitions 0/669 dead transitions. [2024-06-21 20:11:18,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 669 transitions, 11995 flow [2024-06-21 20:11:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:11:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:11:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 20:11:18,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-21 20:11:18,490 INFO L175 Difference]: Start difference. First operand has 484 places, 645 transitions, 10575 flow. Second operand 6 states and 161 transitions. [2024-06-21 20:11:18,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 669 transitions, 11995 flow [2024-06-21 20:11:26,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 669 transitions, 11525 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:11:26,537 INFO L231 Difference]: Finished difference. Result has 485 places, 647 transitions, 10394 flow [2024-06-21 20:11:26,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10109, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10394, PETRI_PLACES=485, PETRI_TRANSITIONS=647} [2024-06-21 20:11:26,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-21 20:11:26,538 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 647 transitions, 10394 flow [2024-06-21 20:11:26,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:11:26,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:26,538 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] [2024-06-21 20:11:26,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:11:26,539 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:26,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:26,539 INFO L85 PathProgramCache]: Analyzing trace with hash -771694431, now seen corresponding path program 24 times [2024-06-21 20:11:26,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:26,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155090290] [2024-06-21 20:11:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:26,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:26,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:26,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155090290] [2024-06-21 20:11:26,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155090290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:26,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:26,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:26,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678157935] [2024-06-21 20:11:26,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:26,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:26,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:11:26,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 647 transitions, 10394 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:26,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:26,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:11:26,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:28,269 INFO L124 PetriNetUnfolderBase]: 3631/6176 cut-off events. [2024-06-21 20:11:28,270 INFO L125 PetriNetUnfolderBase]: For 1456940/1456940 co-relation queries the response was YES. [2024-06-21 20:11:28,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58935 conditions, 6176 events. 3631/6176 cut-off events. For 1456940/1456940 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 42993 event pairs, 688 based on Foata normal form. 1/6175 useless extension candidates. Maximal degree in co-relation 58720. Up to 5494 conditions per place. [2024-06-21 20:11:28,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 616 selfloop transitions, 52 changer transitions 0/676 dead transitions. [2024-06-21 20:11:28,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 676 transitions, 12078 flow [2024-06-21 20:11:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:11:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:11:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 20:11:28,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:11:28,352 INFO L175 Difference]: Start difference. First operand has 485 places, 647 transitions, 10394 flow. Second operand 9 states and 216 transitions. [2024-06-21 20:11:28,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 676 transitions, 12078 flow [2024-06-21 20:11:35,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 676 transitions, 11739 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 20:11:35,155 INFO L231 Difference]: Finished difference. Result has 486 places, 647 transitions, 10167 flow [2024-06-21 20:11:35,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10057, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10167, PETRI_PLACES=486, PETRI_TRANSITIONS=647} [2024-06-21 20:11:35,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-21 20:11:35,156 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 647 transitions, 10167 flow [2024-06-21 20:11:35,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:35,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:35,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:35,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:11:35,156 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:35,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:35,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1962003209, now seen corresponding path program 25 times [2024-06-21 20:11:35,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:35,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150416311] [2024-06-21 20:11:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:35,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:35,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:35,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150416311] [2024-06-21 20:11:35,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150416311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:35,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:35,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144481307] [2024-06-21 20:11:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:35,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:35,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:35,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:11:35,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 647 transitions, 10167 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:35,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:35,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:11:35,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:36,710 INFO L124 PetriNetUnfolderBase]: 3628/6172 cut-off events. [2024-06-21 20:11:36,710 INFO L125 PetriNetUnfolderBase]: For 1444671/1444671 co-relation queries the response was YES. [2024-06-21 20:11:36,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58432 conditions, 6172 events. 3628/6172 cut-off events. For 1444671/1444671 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 42944 event pairs, 688 based on Foata normal form. 1/6171 useless extension candidates. Maximal degree in co-relation 58219. Up to 5491 conditions per place. [2024-06-21 20:11:36,795 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 614 selfloop transitions, 51 changer transitions 0/673 dead transitions. [2024-06-21 20:11:36,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 673 transitions, 11563 flow [2024-06-21 20:11:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:11:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:11:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:11:36,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:11:36,796 INFO L175 Difference]: Start difference. First operand has 486 places, 647 transitions, 10167 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:11:36,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 673 transitions, 11563 flow [2024-06-21 20:11:44,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 673 transitions, 11313 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 20:11:44,784 INFO L231 Difference]: Finished difference. Result has 483 places, 647 transitions, 10025 flow [2024-06-21 20:11:44,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9917, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10025, PETRI_PLACES=483, PETRI_TRANSITIONS=647} [2024-06-21 20:11:44,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-21 20:11:44,784 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 647 transitions, 10025 flow [2024-06-21 20:11:44,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:44,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:44,785 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] [2024-06-21 20:11:44,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:11:44,785 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:44,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:44,785 INFO L85 PathProgramCache]: Analyzing trace with hash -772023837, now seen corresponding path program 4 times [2024-06-21 20:11:44,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:44,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655186990] [2024-06-21 20:11:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:44,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:44,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:44,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655186990] [2024-06-21 20:11:44,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655186990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:44,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:44,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:44,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459125513] [2024-06-21 20:11:44,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:44,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:44,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:44,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:44,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:44,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:11:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 647 transitions, 10025 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:44,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:44,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:11:44,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:46,473 INFO L124 PetriNetUnfolderBase]: 3615/6157 cut-off events. [2024-06-21 20:11:46,473 INFO L125 PetriNetUnfolderBase]: For 1454489/1454489 co-relation queries the response was YES. [2024-06-21 20:11:46,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57524 conditions, 6157 events. 3615/6157 cut-off events. For 1454489/1454489 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42874 event pairs, 601 based on Foata normal form. 6/6161 useless extension candidates. Maximal degree in co-relation 57310. Up to 5368 conditions per place. [2024-06-21 20:11:46,560 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 632 selfloop transitions, 40 changer transitions 0/680 dead transitions. [2024-06-21 20:11:46,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 680 transitions, 11493 flow [2024-06-21 20:11:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:11:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:11:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:11:46,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 20:11:46,562 INFO L175 Difference]: Start difference. First operand has 483 places, 647 transitions, 10025 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:11:46,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 680 transitions, 11493 flow [2024-06-21 20:11:53,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 680 transitions, 11387 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:11:53,627 INFO L231 Difference]: Finished difference. Result has 484 places, 647 transitions, 10003 flow [2024-06-21 20:11:53,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9919, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10003, PETRI_PLACES=484, PETRI_TRANSITIONS=647} [2024-06-21 20:11:53,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-21 20:11:53,628 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 647 transitions, 10003 flow [2024-06-21 20:11:53,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:53,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:53,635 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] [2024-06-21 20:11:53,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:11:53,637 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:53,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1857268731, now seen corresponding path program 3 times [2024-06-21 20:11:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:53,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879746826] [2024-06-21 20:11:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:53,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879746826] [2024-06-21 20:11:53,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879746826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:53,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:53,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:11:53,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62531888] [2024-06-21 20:11:53,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:53,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:11:53,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:53,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:11:53,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:11:53,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:11:53,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 647 transitions, 10003 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:11:53,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:53,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:11:53,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:55,337 INFO L124 PetriNetUnfolderBase]: 3649/6199 cut-off events. [2024-06-21 20:11:55,337 INFO L125 PetriNetUnfolderBase]: For 1476429/1476429 co-relation queries the response was YES. [2024-06-21 20:11:55,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58669 conditions, 6199 events. 3649/6199 cut-off events. For 1476429/1476429 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 43100 event pairs, 686 based on Foata normal form. 2/6194 useless extension candidates. Maximal degree in co-relation 58454. Up to 5407 conditions per place. [2024-06-21 20:11:55,422 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 594 selfloop transitions, 74 changer transitions 0/676 dead transitions. [2024-06-21 20:11:55,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 676 transitions, 11811 flow [2024-06-21 20:11:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:11:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:11:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:11:55,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 20:11:55,423 INFO L175 Difference]: Start difference. First operand has 484 places, 647 transitions, 10003 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:11:55,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 676 transitions, 11811 flow [2024-06-21 20:12:03,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 676 transitions, 11705 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:12:03,325 INFO L231 Difference]: Finished difference. Result has 487 places, 653 transitions, 10205 flow [2024-06-21 20:12:03,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9897, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10205, PETRI_PLACES=487, PETRI_TRANSITIONS=653} [2024-06-21 20:12:03,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-21 20:12:03,326 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 653 transitions, 10205 flow [2024-06-21 20:12:03,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:12:03,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:03,326 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] [2024-06-21 20:12:03,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:12:03,326 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:03,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1575251991, now seen corresponding path program 4 times [2024-06-21 20:12:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868228169] [2024-06-21 20:12:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:03,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868228169] [2024-06-21 20:12:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868228169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:03,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:03,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138369405] [2024-06-21 20:12:03,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:03,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:03,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:03,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:03,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:12:03,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 653 transitions, 10205 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:12:03,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:03,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:12:03,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:05,050 INFO L124 PetriNetUnfolderBase]: 3657/6214 cut-off events. [2024-06-21 20:12:05,051 INFO L125 PetriNetUnfolderBase]: For 1497727/1497727 co-relation queries the response was YES. [2024-06-21 20:12:05,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59097 conditions, 6214 events. 3657/6214 cut-off events. For 1497727/1497727 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43306 event pairs, 693 based on Foata normal form. 2/6211 useless extension candidates. Maximal degree in co-relation 58880. Up to 5461 conditions per place. [2024-06-21 20:12:05,133 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 596 selfloop transitions, 69 changer transitions 0/673 dead transitions. [2024-06-21 20:12:05,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 673 transitions, 11631 flow [2024-06-21 20:12:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:12:05,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:12:05,134 INFO L175 Difference]: Start difference. First operand has 487 places, 653 transitions, 10205 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:12:05,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 673 transitions, 11631 flow [2024-06-21 20:12:13,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 673 transitions, 11445 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:13,728 INFO L231 Difference]: Finished difference. Result has 491 places, 655 transitions, 10218 flow [2024-06-21 20:12:13,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10041, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10218, PETRI_PLACES=491, PETRI_TRANSITIONS=655} [2024-06-21 20:12:13,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-21 20:12:13,729 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 655 transitions, 10218 flow [2024-06-21 20:12:13,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:12:13,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:13,729 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] [2024-06-21 20:12:13,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:12:13,729 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:13,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1151152237, now seen corresponding path program 5 times [2024-06-21 20:12:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:13,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548050712] [2024-06-21 20:12:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:13,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:13,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:13,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548050712] [2024-06-21 20:12:13,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548050712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:13,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:12:13,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836201214] [2024-06-21 20:12:13,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:13,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:12:13,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:13,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:12:13,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:12:13,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:12:13,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 655 transitions, 10218 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:13,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:13,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:12:13,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:15,491 INFO L124 PetriNetUnfolderBase]: 3652/6207 cut-off events. [2024-06-21 20:12:15,491 INFO L125 PetriNetUnfolderBase]: For 1497017/1497017 co-relation queries the response was YES. [2024-06-21 20:12:15,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58850 conditions, 6207 events. 3652/6207 cut-off events. For 1497017/1497017 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43218 event pairs, 692 based on Foata normal form. 2/6204 useless extension candidates. Maximal degree in co-relation 58631. Up to 5454 conditions per place. [2024-06-21 20:12:15,575 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 597 selfloop transitions, 69 changer transitions 0/674 dead transitions. [2024-06-21 20:12:15,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 674 transitions, 11596 flow [2024-06-21 20:12:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:12:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:12:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 20:12:15,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 20:12:15,576 INFO L175 Difference]: Start difference. First operand has 491 places, 655 transitions, 10218 flow. Second operand 8 states and 187 transitions. [2024-06-21 20:12:15,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 674 transitions, 11596 flow [2024-06-21 20:12:24,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 674 transitions, 11427 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:12:24,627 INFO L231 Difference]: Finished difference. Result has 494 places, 655 transitions, 10192 flow [2024-06-21 20:12:24,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10049, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10192, PETRI_PLACES=494, PETRI_TRANSITIONS=655} [2024-06-21 20:12:24,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 20:12:24,628 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 655 transitions, 10192 flow [2024-06-21 20:12:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:24,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:24,628 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] [2024-06-21 20:12:24,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 20:12:24,629 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:24,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:24,629 INFO L85 PathProgramCache]: Analyzing trace with hash 872177155, now seen corresponding path program 5 times [2024-06-21 20:12:24,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:24,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775097624] [2024-06-21 20:12:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775097624] [2024-06-21 20:12:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775097624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:24,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:24,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:12:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659602927] [2024-06-21 20:12:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:12:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:12:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:12:24,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:12:24,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 655 transitions, 10192 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:24,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:24,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:12:24,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:26,410 INFO L124 PetriNetUnfolderBase]: 3629/6174 cut-off events. [2024-06-21 20:12:26,410 INFO L125 PetriNetUnfolderBase]: For 1496429/1496429 co-relation queries the response was YES. [2024-06-21 20:12:26,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57257 conditions, 6174 events. 3629/6174 cut-off events. For 1496429/1496429 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43037 event pairs, 687 based on Foata normal form. 10/6179 useless extension candidates. Maximal degree in co-relation 57037. Up to 5231 conditions per place. [2024-06-21 20:12:26,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 496 selfloop transitions, 174 changer transitions 0/678 dead transitions. [2024-06-21 20:12:26,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 678 transitions, 11637 flow [2024-06-21 20:12:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:12:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:12:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:12:26,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:12:26,497 INFO L175 Difference]: Start difference. First operand has 494 places, 655 transitions, 10192 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:12:26,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 678 transitions, 11637 flow [2024-06-21 20:12:34,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 678 transitions, 11456 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:12:34,965 INFO L231 Difference]: Finished difference. Result has 496 places, 656 transitions, 10392 flow [2024-06-21 20:12:34,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10019, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10392, PETRI_PLACES=496, PETRI_TRANSITIONS=656} [2024-06-21 20:12:34,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-21 20:12:34,966 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 656 transitions, 10392 flow [2024-06-21 20:12:34,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:34,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:34,966 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] [2024-06-21 20:12:34,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 20:12:34,967 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:34,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1295408123, now seen corresponding path program 6 times [2024-06-21 20:12:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:34,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726573449] [2024-06-21 20:12:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:34,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:35,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:35,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726573449] [2024-06-21 20:12:35,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726573449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:35,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:35,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:35,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186164613] [2024-06-21 20:12:35,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:35,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:35,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:35,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:12:35,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 656 transitions, 10392 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:12:35,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:35,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:12:35,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:36,735 INFO L124 PetriNetUnfolderBase]: 3637/6190 cut-off events. [2024-06-21 20:12:36,736 INFO L125 PetriNetUnfolderBase]: For 1435464/1435464 co-relation queries the response was YES. [2024-06-21 20:12:36,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57646 conditions, 6190 events. 3637/6190 cut-off events. For 1435464/1435464 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 43038 event pairs, 562 based on Foata normal form. 2/6187 useless extension candidates. Maximal degree in co-relation 57425. Up to 5220 conditions per place. [2024-06-21 20:12:36,819 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 586 selfloop transitions, 92 changer transitions 0/686 dead transitions. [2024-06-21 20:12:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 686 transitions, 12514 flow [2024-06-21 20:12:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:12:36,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 20:12:36,820 INFO L175 Difference]: Start difference. First operand has 496 places, 656 transitions, 10392 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:12:36,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 686 transitions, 12514 flow [2024-06-21 20:12:45,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 686 transitions, 12158 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:12:45,653 INFO L231 Difference]: Finished difference. Result has 498 places, 661 transitions, 10372 flow [2024-06-21 20:12:45,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10036, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10372, PETRI_PLACES=498, PETRI_TRANSITIONS=661} [2024-06-21 20:12:45,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-21 20:12:45,654 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 661 transitions, 10372 flow [2024-06-21 20:12:45,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:12:45,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:45,654 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] [2024-06-21 20:12:45,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 20:12:45,654 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:45,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1283027963, now seen corresponding path program 7 times [2024-06-21 20:12:45,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:45,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208576418] [2024-06-21 20:12:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:45,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208576418] [2024-06-21 20:12:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208576418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:45,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:45,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:12:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757313490] [2024-06-21 20:12:45,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:45,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:12:45,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:12:45,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:12:45,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:12:45,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 661 transitions, 10372 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:45,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:45,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:12:45,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:47,501 INFO L124 PetriNetUnfolderBase]: 3645/6218 cut-off events. [2024-06-21 20:12:47,502 INFO L125 PetriNetUnfolderBase]: For 1453301/1453301 co-relation queries the response was YES. [2024-06-21 20:12:47,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57897 conditions, 6218 events. 3645/6218 cut-off events. For 1453301/1453301 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43514 event pairs, 586 based on Foata normal form. 2/6215 useless extension candidates. Maximal degree in co-relation 57674. Up to 5337 conditions per place. [2024-06-21 20:12:47,586 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 93 changer transitions 0/687 dead transitions. [2024-06-21 20:12:47,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 687 transitions, 11844 flow [2024-06-21 20:12:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:12:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:12:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:12:47,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:12:47,587 INFO L175 Difference]: Start difference. First operand has 498 places, 661 transitions, 10372 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:12:47,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 687 transitions, 11844 flow [2024-06-21 20:12:56,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 687 transitions, 11565 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 20:12:56,029 INFO L231 Difference]: Finished difference. Result has 502 places, 663 transitions, 10344 flow [2024-06-21 20:12:56,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10344, PETRI_PLACES=502, PETRI_TRANSITIONS=663} [2024-06-21 20:12:56,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-21 20:12:56,030 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 663 transitions, 10344 flow [2024-06-21 20:12:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:56,030 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] [2024-06-21 20:12:56,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 20:12:56,030 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:56,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1462510597, now seen corresponding path program 8 times [2024-06-21 20:12:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:56,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923415617] [2024-06-21 20:12:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:56,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923415617] [2024-06-21 20:12:56,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923415617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:56,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:56,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:12:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684505576] [2024-06-21 20:12:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:12:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:12:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:12:56,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:12:56,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 663 transitions, 10344 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:56,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:56,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:12:56,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:57,924 INFO L124 PetriNetUnfolderBase]: 3640/6195 cut-off events. [2024-06-21 20:12:57,924 INFO L125 PetriNetUnfolderBase]: For 1449263/1449263 co-relation queries the response was YES. [2024-06-21 20:12:57,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57430 conditions, 6195 events. 3640/6195 cut-off events. For 1449263/1449263 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43213 event pairs, 680 based on Foata normal form. 2/6188 useless extension candidates. Maximal degree in co-relation 57206. Up to 5415 conditions per place. [2024-06-21 20:12:58,028 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 599 selfloop transitions, 78 changer transitions 0/685 dead transitions. [2024-06-21 20:12:58,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 685 transitions, 12042 flow [2024-06-21 20:12:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:12:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:12:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:12:58,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 20:12:58,030 INFO L175 Difference]: Start difference. First operand has 502 places, 663 transitions, 10344 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:12:58,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 685 transitions, 12042 flow [2024-06-21 20:13:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 685 transitions, 11839 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:13:06,507 INFO L231 Difference]: Finished difference. Result has 505 places, 663 transitions, 10302 flow [2024-06-21 20:13:06,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10141, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10302, PETRI_PLACES=505, PETRI_TRANSITIONS=663} [2024-06-21 20:13:06,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-21 20:13:06,508 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 663 transitions, 10302 flow [2024-06-21 20:13:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:06,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:06,508 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] [2024-06-21 20:13:06,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 20:13:06,509 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:06,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1452987397, now seen corresponding path program 9 times [2024-06-21 20:13:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332211959] [2024-06-21 20:13:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:06,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:06,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332211959] [2024-06-21 20:13:06,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332211959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:06,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:06,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:13:06,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856826084] [2024-06-21 20:13:06,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:06,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:13:06,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:13:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:13:06,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:13:06,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 663 transitions, 10302 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:06,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:06,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:13:06,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:08,237 INFO L124 PetriNetUnfolderBase]: 3635/6192 cut-off events. [2024-06-21 20:13:08,237 INFO L125 PetriNetUnfolderBase]: For 1446175/1446175 co-relation queries the response was YES. [2024-06-21 20:13:08,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57107 conditions, 6192 events. 3635/6192 cut-off events. For 1446175/1446175 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43252 event pairs, 685 based on Foata normal form. 2/6189 useless extension candidates. Maximal degree in co-relation 56882. Up to 5431 conditions per place. [2024-06-21 20:13:08,324 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 601 selfloop transitions, 73 changer transitions 0/682 dead transitions. [2024-06-21 20:13:08,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 682 transitions, 11696 flow [2024-06-21 20:13:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 20:13:08,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 20:13:08,325 INFO L175 Difference]: Start difference. First operand has 505 places, 663 transitions, 10302 flow. Second operand 8 states and 187 transitions. [2024-06-21 20:13:08,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 682 transitions, 11696 flow [2024-06-21 20:13:17,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 682 transitions, 11502 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:13:17,028 INFO L231 Difference]: Finished difference. Result has 507 places, 663 transitions, 10259 flow [2024-06-21 20:13:17,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10108, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10259, PETRI_PLACES=507, PETRI_TRANSITIONS=663} [2024-06-21 20:13:17,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-21 20:13:17,029 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 663 transitions, 10259 flow [2024-06-21 20:13:17,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:17,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:17,029 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] [2024-06-21 20:13:17,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 20:13:17,030 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:17,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash 578652071, now seen corresponding path program 10 times [2024-06-21 20:13:17,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684384022] [2024-06-21 20:13:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:17,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:17,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:17,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684384022] [2024-06-21 20:13:17,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684384022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:17,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:17,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:17,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816405989] [2024-06-21 20:13:17,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:17,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:17,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:17,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:13:17,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 663 transitions, 10259 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:13:17,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:17,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:13:17,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:18,834 INFO L124 PetriNetUnfolderBase]: 3679/6271 cut-off events. [2024-06-21 20:13:18,834 INFO L125 PetriNetUnfolderBase]: For 1575218/1575218 co-relation queries the response was YES. [2024-06-21 20:13:18,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57807 conditions, 6271 events. 3679/6271 cut-off events. For 1575218/1575218 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43889 event pairs, 683 based on Foata normal form. 12/6281 useless extension candidates. Maximal degree in co-relation 57581. Up to 5555 conditions per place. [2024-06-21 20:13:18,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 634 selfloop transitions, 44 changer transitions 0/686 dead transitions. [2024-06-21 20:13:18,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 686 transitions, 11785 flow [2024-06-21 20:13:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:13:18,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 20:13:18,921 INFO L175 Difference]: Start difference. First operand has 507 places, 663 transitions, 10259 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:13:18,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 686 transitions, 11785 flow [2024-06-21 20:13:26,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 686 transitions, 11635 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:13:26,895 INFO L231 Difference]: Finished difference. Result has 508 places, 667 transitions, 10312 flow [2024-06-21 20:13:26,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10109, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10312, PETRI_PLACES=508, PETRI_TRANSITIONS=667} [2024-06-21 20:13:26,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-21 20:13:26,895 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 667 transitions, 10312 flow [2024-06-21 20:13:26,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:13:26,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:26,896 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] [2024-06-21 20:13:26,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 20:13:26,896 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:26,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 867335051, now seen corresponding path program 11 times [2024-06-21 20:13:26,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:26,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126040622] [2024-06-21 20:13:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:26,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:26,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:26,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126040622] [2024-06-21 20:13:26,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126040622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:26,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:26,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:26,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461768978] [2024-06-21 20:13:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:26,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:27,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:13:27,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 667 transitions, 10312 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:13:27,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:27,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:13:27,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:28,597 INFO L124 PetriNetUnfolderBase]: 3657/6235 cut-off events. [2024-06-21 20:13:28,597 INFO L125 PetriNetUnfolderBase]: For 1483449/1483449 co-relation queries the response was YES. [2024-06-21 20:13:28,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56114 conditions, 6235 events. 3657/6235 cut-off events. For 1483449/1483449 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 43650 event pairs, 651 based on Foata normal form. 12/6241 useless extension candidates. Maximal degree in co-relation 55887. Up to 5315 conditions per place. [2024-06-21 20:13:28,682 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 633 selfloop transitions, 51 changer transitions 0/692 dead transitions. [2024-06-21 20:13:28,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 692 transitions, 11820 flow [2024-06-21 20:13:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:13:28,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 20:13:28,683 INFO L175 Difference]: Start difference. First operand has 508 places, 667 transitions, 10312 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:13:28,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 692 transitions, 11820 flow [2024-06-21 20:13:35,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 692 transitions, 11689 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:13:35,067 INFO L231 Difference]: Finished difference. Result has 510 places, 669 transitions, 10329 flow [2024-06-21 20:13:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10329, PETRI_PLACES=510, PETRI_TRANSITIONS=669} [2024-06-21 20:13:35,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-21 20:13:35,067 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 669 transitions, 10329 flow [2024-06-21 20:13:35,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:13:35,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:35,068 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] [2024-06-21 20:13:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 20:13:35,068 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:35,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1066897403, now seen corresponding path program 6 times [2024-06-21 20:13:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649786277] [2024-06-21 20:13:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:35,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:35,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649786277] [2024-06-21 20:13:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649786277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:13:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664324648] [2024-06-21 20:13:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:35,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:13:35,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:13:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:13:35,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:13:35,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 669 transitions, 10329 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:35,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:35,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:13:35,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:36,981 INFO L124 PetriNetUnfolderBase]: 3693/6301 cut-off events. [2024-06-21 20:13:36,981 INFO L125 PetriNetUnfolderBase]: For 1482301/1482301 co-relation queries the response was YES. [2024-06-21 20:13:37,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56685 conditions, 6301 events. 3693/6301 cut-off events. For 1482301/1482301 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 44242 event pairs, 681 based on Foata normal form. 10/6309 useless extension candidates. Maximal degree in co-relation 56457. Up to 5565 conditions per place. [2024-06-21 20:13:37,083 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 628 selfloop transitions, 55 changer transitions 0/691 dead transitions. [2024-06-21 20:13:37,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 691 transitions, 11839 flow [2024-06-21 20:13:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:13:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:13:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:13:37,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 20:13:37,085 INFO L175 Difference]: Start difference. First operand has 510 places, 669 transitions, 10329 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:13:37,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 691 transitions, 11839 flow [2024-06-21 20:13:45,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 691 transitions, 11723 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:13:45,396 INFO L231 Difference]: Finished difference. Result has 513 places, 671 transitions, 10403 flow [2024-06-21 20:13:45,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10213, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10403, PETRI_PLACES=513, PETRI_TRANSITIONS=671} [2024-06-21 20:13:45,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-21 20:13:45,396 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 671 transitions, 10403 flow [2024-06-21 20:13:45,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:45,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:45,397 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] [2024-06-21 20:13:45,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 20:13:45,397 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:45,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:45,397 INFO L85 PathProgramCache]: Analyzing trace with hash 657853893, now seen corresponding path program 12 times [2024-06-21 20:13:45,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:45,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248362192] [2024-06-21 20:13:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:45,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:45,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:45,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248362192] [2024-06-21 20:13:45,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248362192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:45,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820933754] [2024-06-21 20:13:45,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:45,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:13:45,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 671 transitions, 10403 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:13:45,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:45,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:13:45,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:47,315 INFO L124 PetriNetUnfolderBase]: 3760/6405 cut-off events. [2024-06-21 20:13:47,315 INFO L125 PetriNetUnfolderBase]: For 1619822/1619822 co-relation queries the response was YES. [2024-06-21 20:13:47,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57485 conditions, 6405 events. 3760/6405 cut-off events. For 1619822/1619822 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 45002 event pairs, 681 based on Foata normal form. 22/6425 useless extension candidates. Maximal degree in co-relation 57256. Up to 5465 conditions per place. [2024-06-21 20:13:47,406 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 603 selfloop transitions, 98 changer transitions 0/709 dead transitions. [2024-06-21 20:13:47,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 709 transitions, 12040 flow [2024-06-21 20:13:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:47,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 20:13:47,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-21 20:13:47,407 INFO L175 Difference]: Start difference. First operand has 513 places, 671 transitions, 10403 flow. Second operand 8 states and 209 transitions. [2024-06-21 20:13:47,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 709 transitions, 12040 flow [2024-06-21 20:13:55,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 709 transitions, 11876 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:13:55,499 INFO L231 Difference]: Finished difference. Result has 514 places, 675 transitions, 10589 flow [2024-06-21 20:13:55,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10239, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10589, PETRI_PLACES=514, PETRI_TRANSITIONS=675} [2024-06-21 20:13:55,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-21 20:13:55,500 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 675 transitions, 10589 flow [2024-06-21 20:13:55,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:13:55,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:55,500 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] [2024-06-21 20:13:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 20:13:55,500 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:55,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1015775733, now seen corresponding path program 13 times [2024-06-21 20:13:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575622099] [2024-06-21 20:13:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:55,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575622099] [2024-06-21 20:13:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575622099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:55,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:55,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:55,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954148354] [2024-06-21 20:13:55,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:55,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:55,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:55,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:13:55,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 675 transitions, 10589 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:13:55,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:55,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:13:55,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:57,352 INFO L124 PetriNetUnfolderBase]: 3715/6357 cut-off events. [2024-06-21 20:13:57,352 INFO L125 PetriNetUnfolderBase]: For 1407414/1407414 co-relation queries the response was YES. [2024-06-21 20:13:57,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54141 conditions, 6357 events. 3715/6357 cut-off events. For 1407414/1407414 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 44872 event pairs, 516 based on Foata normal form. 22/6377 useless extension candidates. Maximal degree in co-relation 53911. Up to 4719 conditions per place. [2024-06-21 20:13:57,443 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 589 selfloop transitions, 119 changer transitions 0/716 dead transitions. [2024-06-21 20:13:57,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 716 transitions, 12523 flow [2024-06-21 20:13:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 20:13:57,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-21 20:13:57,444 INFO L175 Difference]: Start difference. First operand has 514 places, 675 transitions, 10589 flow. Second operand 8 states and 213 transitions. [2024-06-21 20:13:57,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 716 transitions, 12523 flow [2024-06-21 20:14:04,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 716 transitions, 12274 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:14:04,658 INFO L231 Difference]: Finished difference. Result has 516 places, 677 transitions, 10671 flow [2024-06-21 20:14:04,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10342, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10671, PETRI_PLACES=516, PETRI_TRANSITIONS=677} [2024-06-21 20:14:04,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-21 20:14:04,659 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 677 transitions, 10671 flow [2024-06-21 20:14:04,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-21 20:14:04,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:04,659 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] [2024-06-21 20:14:04,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 20:14:04,659 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:04,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -387746783, now seen corresponding path program 7 times [2024-06-21 20:14:04,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:04,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039794485] [2024-06-21 20:14:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:04,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:04,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039794485] [2024-06-21 20:14:04,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039794485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:04,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:04,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:04,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279827333] [2024-06-21 20:14:04,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:04,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:04,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:04,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:04,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:04,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:14:04,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 677 transitions, 10671 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:04,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:04,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:14:04,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:06,446 INFO L124 PetriNetUnfolderBase]: 3723/6362 cut-off events. [2024-06-21 20:14:06,446 INFO L125 PetriNetUnfolderBase]: For 1185026/1185029 co-relation queries the response was YES. [2024-06-21 20:14:06,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54382 conditions, 6362 events. 3723/6362 cut-off events. For 1185026/1185029 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 44848 event pairs, 682 based on Foata normal form. 4/6363 useless extension candidates. Maximal degree in co-relation 54151. Up to 5497 conditions per place. [2024-06-21 20:14:06,530 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 567 selfloop transitions, 126 changer transitions 0/701 dead transitions. [2024-06-21 20:14:06,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 701 transitions, 12185 flow [2024-06-21 20:14:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:14:06,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:14:06,532 INFO L175 Difference]: Start difference. First operand has 516 places, 677 transitions, 10671 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:14:06,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 701 transitions, 12185 flow [2024-06-21 20:14:12,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 701 transitions, 11982 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:14:12,867 INFO L231 Difference]: Finished difference. Result has 519 places, 679 transitions, 10803 flow [2024-06-21 20:14:12,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10468, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10803, PETRI_PLACES=519, PETRI_TRANSITIONS=679} [2024-06-21 20:14:12,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-21 20:14:12,867 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 679 transitions, 10803 flow [2024-06-21 20:14:12,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:12,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:12,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:12,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 20:14:12,868 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:12,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash 401538081, now seen corresponding path program 8 times [2024-06-21 20:14:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:12,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923377719] [2024-06-21 20:14:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:12,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:12,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:12,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923377719] [2024-06-21 20:14:12,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923377719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:12,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:12,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:12,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821924352] [2024-06-21 20:14:12,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:12,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:12,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:13,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:14:13,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 679 transitions, 10803 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:13,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:13,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:14:13,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:14,648 INFO L124 PetriNetUnfolderBase]: 3759/6417 cut-off events. [2024-06-21 20:14:14,649 INFO L125 PetriNetUnfolderBase]: For 1277747/1277747 co-relation queries the response was YES. [2024-06-21 20:14:14,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54648 conditions, 6417 events. 3759/6417 cut-off events. For 1277747/1277747 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 45311 event pairs, 679 based on Foata normal form. 10/6425 useless extension candidates. Maximal degree in co-relation 54416. Up to 5483 conditions per place. [2024-06-21 20:14:14,737 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 127 changer transitions 0/713 dead transitions. [2024-06-21 20:14:14,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 713 transitions, 12397 flow [2024-06-21 20:14:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:14:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:14:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 20:14:14,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-21 20:14:14,738 INFO L175 Difference]: Start difference. First operand has 519 places, 679 transitions, 10803 flow. Second operand 9 states and 224 transitions. [2024-06-21 20:14:14,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 713 transitions, 12397 flow [2024-06-21 20:14:21,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 713 transitions, 12078 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 20:14:21,735 INFO L231 Difference]: Finished difference. Result has 522 places, 681 transitions, 10830 flow [2024-06-21 20:14:21,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10484, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10830, PETRI_PLACES=522, PETRI_TRANSITIONS=681} [2024-06-21 20:14:21,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-21 20:14:21,736 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 681 transitions, 10830 flow [2024-06-21 20:14:21,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:21,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:21,736 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] [2024-06-21 20:14:21,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 20:14:21,736 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:21,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash -31032287, now seen corresponding path program 9 times [2024-06-21 20:14:21,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:21,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617659795] [2024-06-21 20:14:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:21,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:21,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:21,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617659795] [2024-06-21 20:14:21,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617659795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:21,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:21,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:21,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374853578] [2024-06-21 20:14:21,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:21,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:21,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:21,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:14:21,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 681 transitions, 10830 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:21,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:21,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:14:21,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:23,580 INFO L124 PetriNetUnfolderBase]: 3747/6396 cut-off events. [2024-06-21 20:14:23,580 INFO L125 PetriNetUnfolderBase]: For 1176495/1176498 co-relation queries the response was YES. [2024-06-21 20:14:23,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54293 conditions, 6396 events. 3747/6396 cut-off events. For 1176495/1176498 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 45129 event pairs, 684 based on Foata normal form. 4/6397 useless extension candidates. Maximal degree in co-relation 54060. Up to 5584 conditions per place. [2024-06-21 20:14:23,666 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 609 selfloop transitions, 88 changer transitions 0/705 dead transitions. [2024-06-21 20:14:23,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 705 transitions, 12284 flow [2024-06-21 20:14:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:14:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:14:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:14:23,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:14:23,667 INFO L175 Difference]: Start difference. First operand has 522 places, 681 transitions, 10830 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:14:23,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 705 transitions, 12284 flow [2024-06-21 20:14:30,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 705 transitions, 11966 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 20:14:30,841 INFO L231 Difference]: Finished difference. Result has 522 places, 681 transitions, 10693 flow [2024-06-21 20:14:30,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10512, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10693, PETRI_PLACES=522, PETRI_TRANSITIONS=681} [2024-06-21 20:14:30,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-21 20:14:30,841 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 681 transitions, 10693 flow [2024-06-21 20:14:30,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:30,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:30,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:30,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 20:14:30,842 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:30,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:30,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1248108581, now seen corresponding path program 10 times [2024-06-21 20:14:30,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:30,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92007329] [2024-06-21 20:14:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:30,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:30,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:30,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92007329] [2024-06-21 20:14:30,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92007329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:30,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:30,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:30,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726006209] [2024-06-21 20:14:30,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:30,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:30,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:30,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:14:30,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 681 transitions, 10693 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:30,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:30,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:14:30,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:32,667 INFO L124 PetriNetUnfolderBase]: 3755/6399 cut-off events. [2024-06-21 20:14:32,667 INFO L125 PetriNetUnfolderBase]: For 1172880/1172883 co-relation queries the response was YES. [2024-06-21 20:14:32,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53877 conditions, 6399 events. 3755/6399 cut-off events. For 1172880/1172883 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45117 event pairs, 667 based on Foata normal form. 4/6400 useless extension candidates. Maximal degree in co-relation 53643. Up to 5438 conditions per place. [2024-06-21 20:14:32,754 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 603 selfloop transitions, 101 changer transitions 0/712 dead transitions. [2024-06-21 20:14:32,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 712 transitions, 12267 flow [2024-06-21 20:14:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:14:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:14:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:14:32,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:14:32,755 INFO L175 Difference]: Start difference. First operand has 522 places, 681 transitions, 10693 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:14:32,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 712 transitions, 12267 flow [2024-06-21 20:14:40,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 712 transitions, 11935 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:14:40,339 INFO L231 Difference]: Finished difference. Result has 523 places, 684 transitions, 10671 flow [2024-06-21 20:14:40,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10361, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10671, PETRI_PLACES=523, PETRI_TRANSITIONS=684} [2024-06-21 20:14:40,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-21 20:14:40,342 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 684 transitions, 10671 flow [2024-06-21 20:14:40,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:40,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:40,342 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] [2024-06-21 20:14:40,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 20:14:40,343 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:40,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash -623922143, now seen corresponding path program 11 times [2024-06-21 20:14:40,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:40,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6928327] [2024-06-21 20:14:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:40,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:40,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6928327] [2024-06-21 20:14:40,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6928327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:40,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:40,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408977399] [2024-06-21 20:14:40,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:40,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:40,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:40,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:40,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:14:40,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 684 transitions, 10671 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:40,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:40,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:14:40,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:42,294 INFO L124 PetriNetUnfolderBase]: 3763/6424 cut-off events. [2024-06-21 20:14:42,294 INFO L125 PetriNetUnfolderBase]: For 1184948/1184951 co-relation queries the response was YES. [2024-06-21 20:14:42,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54149 conditions, 6424 events. 3763/6424 cut-off events. For 1184948/1184951 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45414 event pairs, 686 based on Foata normal form. 4/6425 useless extension candidates. Maximal degree in co-relation 53913. Up to 5557 conditions per place. [2024-06-21 20:14:42,381 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 577 selfloop transitions, 126 changer transitions 0/711 dead transitions. [2024-06-21 20:14:42,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 711 transitions, 12217 flow [2024-06-21 20:14:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:14:42,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:14:42,382 INFO L175 Difference]: Start difference. First operand has 523 places, 684 transitions, 10671 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:14:42,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 711 transitions, 12217 flow [2024-06-21 20:14:50,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 711 transitions, 12001 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:14:50,477 INFO L231 Difference]: Finished difference. Result has 527 places, 686 transitions, 10794 flow [2024-06-21 20:14:50,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10794, PETRI_PLACES=527, PETRI_TRANSITIONS=686} [2024-06-21 20:14:50,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-21 20:14:50,477 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 686 transitions, 10794 flow [2024-06-21 20:14:50,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:50,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:50,478 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] [2024-06-21 20:14:50,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 20:14:50,478 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:50,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash -387450113, now seen corresponding path program 12 times [2024-06-21 20:14:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820889731] [2024-06-21 20:14:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:50,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820889731] [2024-06-21 20:14:50,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820889731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:50,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:50,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:50,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601535992] [2024-06-21 20:14:50,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:50,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:50,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:50,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:14:50,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 686 transitions, 10794 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:50,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:50,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:14:50,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:52,370 INFO L124 PetriNetUnfolderBase]: 3758/6415 cut-off events. [2024-06-21 20:14:52,370 INFO L125 PetriNetUnfolderBase]: For 1176067/1176070 co-relation queries the response was YES. [2024-06-21 20:14:52,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53838 conditions, 6415 events. 3758/6415 cut-off events. For 1176067/1176070 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45327 event pairs, 681 based on Foata normal form. 4/6416 useless extension candidates. Maximal degree in co-relation 53601. Up to 5454 conditions per place. [2024-06-21 20:14:52,460 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 573 selfloop transitions, 135 changer transitions 0/716 dead transitions. [2024-06-21 20:14:52,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 716 transitions, 12434 flow [2024-06-21 20:14:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:14:52,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 20:14:52,461 INFO L175 Difference]: Start difference. First operand has 527 places, 686 transitions, 10794 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:14:52,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 716 transitions, 12434 flow [2024-06-21 20:15:00,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 716 transitions, 12111 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:15:00,566 INFO L231 Difference]: Finished difference. Result has 530 places, 690 transitions, 10903 flow [2024-06-21 20:15:00,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10471, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10903, PETRI_PLACES=530, PETRI_TRANSITIONS=690} [2024-06-21 20:15:00,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-21 20:15:00,566 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 690 transitions, 10903 flow [2024-06-21 20:15:00,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:00,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:00,567 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] [2024-06-21 20:15:00,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 20:15:00,567 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:00,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1108562069, now seen corresponding path program 13 times [2024-06-21 20:15:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:00,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980927620] [2024-06-21 20:15:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:00,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980927620] [2024-06-21 20:15:00,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980927620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:00,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:00,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701656487] [2024-06-21 20:15:00,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:00,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:00,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:00,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:15:00,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 690 transitions, 10903 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:00,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:00,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:15:00,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:02,414 INFO L124 PetriNetUnfolderBase]: 3753/6407 cut-off events. [2024-06-21 20:15:02,415 INFO L125 PetriNetUnfolderBase]: For 1191344/1191347 co-relation queries the response was YES. [2024-06-21 20:15:02,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53068 conditions, 6407 events. 3753/6407 cut-off events. For 1191344/1191347 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 45264 event pairs, 536 based on Foata normal form. 10/6414 useless extension candidates. Maximal degree in co-relation 52829. Up to 4637 conditions per place. [2024-06-21 20:15:02,502 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 604 selfloop transitions, 111 changer transitions 0/723 dead transitions. [2024-06-21 20:15:02,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 723 transitions, 12822 flow [2024-06-21 20:15:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:15:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:15:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:15:02,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-21 20:15:02,504 INFO L175 Difference]: Start difference. First operand has 530 places, 690 transitions, 10903 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:15:02,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 723 transitions, 12822 flow [2024-06-21 20:15:10,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 723 transitions, 12553 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 20:15:10,023 INFO L231 Difference]: Finished difference. Result has 533 places, 692 transitions, 10913 flow [2024-06-21 20:15:10,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10913, PETRI_PLACES=533, PETRI_TRANSITIONS=692} [2024-06-21 20:15:10,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-21 20:15:10,052 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 692 transitions, 10913 flow [2024-06-21 20:15:10,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:10,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:10,053 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] [2024-06-21 20:15:10,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 20:15:10,053 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:10,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash 454559773, now seen corresponding path program 14 times [2024-06-21 20:15:10,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:10,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165654938] [2024-06-21 20:15:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:10,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:10,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:10,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165654938] [2024-06-21 20:15:10,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165654938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:10,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:10,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873653970] [2024-06-21 20:15:10,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:10,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:15:10,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 692 transitions, 10913 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:10,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:10,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:15:10,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:11,936 INFO L124 PetriNetUnfolderBase]: 3741/6398 cut-off events. [2024-06-21 20:15:11,936 INFO L125 PetriNetUnfolderBase]: For 1107929/1107932 co-relation queries the response was YES. [2024-06-21 20:15:12,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53035 conditions, 6398 events. 3741/6398 cut-off events. For 1107929/1107932 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 45302 event pairs, 487 based on Foata normal form. 4/6399 useless extension candidates. Maximal degree in co-relation 52794. Up to 4629 conditions per place. [2024-06-21 20:15:12,024 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 591 selfloop transitions, 125 changer transitions 0/724 dead transitions. [2024-06-21 20:15:12,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 724 transitions, 12477 flow [2024-06-21 20:15:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:15:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:15:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 20:15:12,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515679442508711 [2024-06-21 20:15:12,025 INFO L175 Difference]: Start difference. First operand has 533 places, 692 transitions, 10913 flow. Second operand 7 states and 187 transitions. [2024-06-21 20:15:12,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 724 transitions, 12477 flow [2024-06-21 20:15:19,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 724 transitions, 12222 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:15:19,389 INFO L231 Difference]: Finished difference. Result has 536 places, 692 transitions, 10913 flow [2024-06-21 20:15:19,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10913, PETRI_PLACES=536, PETRI_TRANSITIONS=692} [2024-06-21 20:15:19,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 494 predicate places. [2024-06-21 20:15:19,390 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 692 transitions, 10913 flow [2024-06-21 20:15:19,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:19,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:19,390 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, 1] [2024-06-21 20:15:19,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 20:15:19,390 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:19,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1750105389, now seen corresponding path program 1 times [2024-06-21 20:15:19,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:19,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229398127] [2024-06-21 20:15:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:19,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:19,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:19,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229398127] [2024-06-21 20:15:19,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229398127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:19,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:19,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:19,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264845257] [2024-06-21 20:15:19,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:19,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:19,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:19,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:15:19,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 692 transitions, 10913 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:19,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:19,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:15:19,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:21,321 INFO L124 PetriNetUnfolderBase]: 3775/6437 cut-off events. [2024-06-21 20:15:21,321 INFO L125 PetriNetUnfolderBase]: For 1172906/1172906 co-relation queries the response was YES. [2024-06-21 20:15:21,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54333 conditions, 6437 events. 3775/6437 cut-off events. For 1172906/1172906 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 45488 event pairs, 563 based on Foata normal form. 2/6437 useless extension candidates. Maximal degree in co-relation 54091. Up to 5585 conditions per place. [2024-06-21 20:15:21,417 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 672 selfloop transitions, 57 changer transitions 0/737 dead transitions. [2024-06-21 20:15:21,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 737 transitions, 13291 flow [2024-06-21 20:15:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:15:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:15:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 20:15:21,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 20:15:21,418 INFO L175 Difference]: Start difference. First operand has 536 places, 692 transitions, 10913 flow. Second operand 9 states and 222 transitions. [2024-06-21 20:15:21,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 737 transitions, 13291 flow [2024-06-21 20:15:29,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 737 transitions, 12995 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:15:29,169 INFO L231 Difference]: Finished difference. Result has 538 places, 698 transitions, 10932 flow [2024-06-21 20:15:29,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10617, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10932, PETRI_PLACES=538, PETRI_TRANSITIONS=698} [2024-06-21 20:15:29,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-21 20:15:29,170 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 698 transitions, 10932 flow [2024-06-21 20:15:29,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:29,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:29,170 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, 1] [2024-06-21 20:15:29,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 20:15:29,171 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:29,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1744391469, now seen corresponding path program 2 times [2024-06-21 20:15:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:29,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622764670] [2024-06-21 20:15:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:29,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:29,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622764670] [2024-06-21 20:15:29,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622764670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:29,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:29,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:29,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081887590] [2024-06-21 20:15:29,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:29,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:29,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:15:29,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 698 transitions, 10932 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:29,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:29,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:15:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:31,149 INFO L124 PetriNetUnfolderBase]: 3796/6468 cut-off events. [2024-06-21 20:15:31,149 INFO L125 PetriNetUnfolderBase]: For 1210876/1210876 co-relation queries the response was YES. [2024-06-21 20:15:31,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54577 conditions, 6468 events. 3796/6468 cut-off events. For 1210876/1210876 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 45683 event pairs, 567 based on Foata normal form. 2/6468 useless extension candidates. Maximal degree in co-relation 54335. Up to 5605 conditions per place. [2024-06-21 20:15:31,238 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 671 selfloop transitions, 59 changer transitions 0/738 dead transitions. [2024-06-21 20:15:31,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 738 transitions, 13252 flow [2024-06-21 20:15:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:15:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:15:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 20:15:31,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 20:15:31,240 INFO L175 Difference]: Start difference. First operand has 538 places, 698 transitions, 10932 flow. Second operand 9 states and 219 transitions. [2024-06-21 20:15:31,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 738 transitions, 13252 flow [2024-06-21 20:15:39,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 738 transitions, 13034 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 20:15:39,801 INFO L231 Difference]: Finished difference. Result has 543 places, 702 transitions, 10973 flow [2024-06-21 20:15:39,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10768, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10973, PETRI_PLACES=543, PETRI_TRANSITIONS=702} [2024-06-21 20:15:39,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 501 predicate places. [2024-06-21 20:15:39,801 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 702 transitions, 10973 flow [2024-06-21 20:15:39,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:39,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:39,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:15:39,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 20:15:39,802 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:39,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash 846142627, now seen corresponding path program 3 times [2024-06-21 20:15:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854195569] [2024-06-21 20:15:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:39,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:39,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854195569] [2024-06-21 20:15:39,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854195569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:39,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:39,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:39,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090442427] [2024-06-21 20:15:39,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:39,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:39,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:39,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:15:39,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 702 transitions, 10973 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:39,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:39,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:15:39,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:41,669 INFO L124 PetriNetUnfolderBase]: 3791/6456 cut-off events. [2024-06-21 20:15:41,669 INFO L125 PetriNetUnfolderBase]: For 1196299/1196299 co-relation queries the response was YES. [2024-06-21 20:15:41,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54028 conditions, 6456 events. 3791/6456 cut-off events. For 1196299/1196299 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 45590 event pairs, 667 based on Foata normal form. 2/6451 useless extension candidates. Maximal degree in co-relation 53784. Up to 5715 conditions per place. [2024-06-21 20:15:41,761 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 45 changer transitions 0/735 dead transitions. [2024-06-21 20:15:41,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 735 transitions, 12829 flow [2024-06-21 20:15:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:15:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:15:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:15:41,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:15:41,762 INFO L175 Difference]: Start difference. First operand has 543 places, 702 transitions, 10973 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:15:41,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 735 transitions, 12829 flow [2024-06-21 20:15:50,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 735 transitions, 12680 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:15:50,184 INFO L231 Difference]: Finished difference. Result has 546 places, 702 transitions, 10919 flow [2024-06-21 20:15:50,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10919, PETRI_PLACES=546, PETRI_TRANSITIONS=702} [2024-06-21 20:15:50,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-21 20:15:50,185 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 702 transitions, 10919 flow [2024-06-21 20:15:50,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:50,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:50,185 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, 1] [2024-06-21 20:15:50,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 20:15:50,185 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:50,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1914592077, now seen corresponding path program 4 times [2024-06-21 20:15:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803887333] [2024-06-21 20:15:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:50,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:50,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803887333] [2024-06-21 20:15:50,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803887333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:50,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:50,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:15:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910420476] [2024-06-21 20:15:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:50,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:15:50,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:15:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:15:50,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:15:50,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 702 transitions, 10919 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:50,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:50,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:15:50,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:52,250 INFO L124 PetriNetUnfolderBase]: 3799/6473 cut-off events. [2024-06-21 20:15:52,251 INFO L125 PetriNetUnfolderBase]: For 1210346/1210346 co-relation queries the response was YES. [2024-06-21 20:15:52,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54085 conditions, 6473 events. 3799/6473 cut-off events. For 1210346/1210346 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 45772 event pairs, 674 based on Foata normal form. 2/6473 useless extension candidates. Maximal degree in co-relation 53840. Up to 5762 conditions per place. [2024-06-21 20:15:52,341 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 42 changer transitions 0/732 dead transitions. [2024-06-21 20:15:52,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 732 transitions, 12485 flow [2024-06-21 20:15:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:15:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:15:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:15:52,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:15:52,343 INFO L175 Difference]: Start difference. First operand has 546 places, 702 transitions, 10919 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:15:52,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 732 transitions, 12485 flow [2024-06-21 20:16:00,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 732 transitions, 12340 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:00,806 INFO L231 Difference]: Finished difference. Result has 546 places, 704 transitions, 10915 flow [2024-06-21 20:16:00,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10780, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10915, PETRI_PLACES=546, PETRI_TRANSITIONS=704} [2024-06-21 20:16:00,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-21 20:16:00,808 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 704 transitions, 10915 flow [2024-06-21 20:16:00,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:00,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:00,808 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, 1] [2024-06-21 20:16:00,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 20:16:00,809 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:00,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:00,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2094853421, now seen corresponding path program 5 times [2024-06-21 20:16:00,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:00,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807515178] [2024-06-21 20:16:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:00,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807515178] [2024-06-21 20:16:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807515178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:00,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:00,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852122585] [2024-06-21 20:16:00,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:00,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:00,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:00,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:00,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 704 transitions, 10915 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:00,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:00,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:00,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:02,707 INFO L124 PetriNetUnfolderBase]: 3807/6485 cut-off events. [2024-06-21 20:16:02,708 INFO L125 PetriNetUnfolderBase]: For 1225009/1225009 co-relation queries the response was YES. [2024-06-21 20:16:02,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54146 conditions, 6485 events. 3807/6485 cut-off events. For 1225009/1225009 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 45843 event pairs, 674 based on Foata normal form. 2/6485 useless extension candidates. Maximal degree in co-relation 53901. Up to 5774 conditions per place. [2024-06-21 20:16:02,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 685 selfloop transitions, 43 changer transitions 0/736 dead transitions. [2024-06-21 20:16:02,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 736 transitions, 12491 flow [2024-06-21 20:16:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:16:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:16:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 20:16:02,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 20:16:02,799 INFO L175 Difference]: Start difference. First operand has 546 places, 704 transitions, 10915 flow. Second operand 10 states and 230 transitions. [2024-06-21 20:16:02,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 736 transitions, 12491 flow [2024-06-21 20:16:09,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 736 transitions, 12378 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:09,711 INFO L231 Difference]: Finished difference. Result has 550 places, 706 transitions, 10943 flow [2024-06-21 20:16:09,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10802, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10943, PETRI_PLACES=550, PETRI_TRANSITIONS=706} [2024-06-21 20:16:09,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-21 20:16:09,712 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 706 transitions, 10943 flow [2024-06-21 20:16:09,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:09,712 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, 1] [2024-06-21 20:16:09,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 20:16:09,712 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:09,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1514702859, now seen corresponding path program 6 times [2024-06-21 20:16:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:09,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355431772] [2024-06-21 20:16:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:09,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:09,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355431772] [2024-06-21 20:16:09,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355431772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:09,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:09,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831015956] [2024-06-21 20:16:09,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:09,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:09,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:09,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 706 transitions, 10943 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:09,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:09,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:11,722 INFO L124 PetriNetUnfolderBase]: 3815/6495 cut-off events. [2024-06-21 20:16:11,722 INFO L125 PetriNetUnfolderBase]: For 1239204/1239204 co-relation queries the response was YES. [2024-06-21 20:16:11,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54287 conditions, 6495 events. 3815/6495 cut-off events. For 1239204/1239204 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 45839 event pairs, 672 based on Foata normal form. 2/6493 useless extension candidates. Maximal degree in co-relation 54041. Up to 5766 conditions per place. [2024-06-21 20:16:11,810 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 49 changer transitions 0/739 dead transitions. [2024-06-21 20:16:11,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 739 transitions, 12523 flow [2024-06-21 20:16:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:16:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:16:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 20:16:11,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 20:16:11,811 INFO L175 Difference]: Start difference. First operand has 550 places, 706 transitions, 10943 flow. Second operand 10 states and 231 transitions. [2024-06-21 20:16:11,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 739 transitions, 12523 flow [2024-06-21 20:16:18,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 739 transitions, 12404 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:18,455 INFO L231 Difference]: Finished difference. Result has 552 places, 708 transitions, 10973 flow [2024-06-21 20:16:18,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10973, PETRI_PLACES=552, PETRI_TRANSITIONS=708} [2024-06-21 20:16:18,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-21 20:16:18,456 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 708 transitions, 10973 flow [2024-06-21 20:16:18,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:18,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:18,456 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, 1] [2024-06-21 20:16:18,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 20:16:18,456 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:18,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1982324620, now seen corresponding path program 1 times [2024-06-21 20:16:18,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:18,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754193143] [2024-06-21 20:16:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:18,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:18,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754193143] [2024-06-21 20:16:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754193143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:18,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631735524] [2024-06-21 20:16:18,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:18,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:18,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 708 transitions, 10973 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:18,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:18,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:18,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:20,351 INFO L124 PetriNetUnfolderBase]: 3836/6522 cut-off events. [2024-06-21 20:16:20,351 INFO L125 PetriNetUnfolderBase]: For 1268051/1268051 co-relation queries the response was YES. [2024-06-21 20:16:20,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54936 conditions, 6522 events. 3836/6522 cut-off events. For 1268051/1268051 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 46150 event pairs, 704 based on Foata normal form. 1/6515 useless extension candidates. Maximal degree in co-relation 54689. Up to 5431 conditions per place. [2024-06-21 20:16:20,443 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 459 selfloop transitions, 268 changer transitions 0/735 dead transitions. [2024-06-21 20:16:20,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 735 transitions, 12978 flow [2024-06-21 20:16:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:16:20,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:16:20,444 INFO L175 Difference]: Start difference. First operand has 552 places, 708 transitions, 10973 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:16:20,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 735 transitions, 12978 flow [2024-06-21 20:16:29,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 735 transitions, 12851 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:29,173 INFO L231 Difference]: Finished difference. Result has 552 places, 717 transitions, 11714 flow [2024-06-21 20:16:29,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10846, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11714, PETRI_PLACES=552, PETRI_TRANSITIONS=717} [2024-06-21 20:16:29,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-21 20:16:29,173 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 717 transitions, 11714 flow [2024-06-21 20:16:29,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:29,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:29,174 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, 1] [2024-06-21 20:16:29,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 20:16:29,174 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:29,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash 465573038, now seen corresponding path program 2 times [2024-06-21 20:16:29,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906557293] [2024-06-21 20:16:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906557293] [2024-06-21 20:16:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906557293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:29,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:29,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:16:29,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407941531] [2024-06-21 20:16:29,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:29,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:16:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:16:29,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:16:29,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:29,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 717 transitions, 11714 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:29,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:29,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:29,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:31,061 INFO L124 PetriNetUnfolderBase]: 3849/6554 cut-off events. [2024-06-21 20:16:31,062 INFO L125 PetriNetUnfolderBase]: For 1298137/1298137 co-relation queries the response was YES. [2024-06-21 20:16:31,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56120 conditions, 6554 events. 3849/6554 cut-off events. For 1298137/1298137 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 46438 event pairs, 676 based on Foata normal form. 1/6553 useless extension candidates. Maximal degree in co-relation 55871. Up to 5769 conditions per place. [2024-06-21 20:16:31,155 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 645 selfloop transitions, 99 changer transitions 0/752 dead transitions. [2024-06-21 20:16:31,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 752 transitions, 13736 flow [2024-06-21 20:16:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:16:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:16:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 20:16:31,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-21 20:16:31,157 INFO L175 Difference]: Start difference. First operand has 552 places, 717 transitions, 11714 flow. Second operand 9 states and 218 transitions. [2024-06-21 20:16:31,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 752 transitions, 13736 flow [2024-06-21 20:16:39,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 752 transitions, 13400 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:39,438 INFO L231 Difference]: Finished difference. Result has 556 places, 723 transitions, 11722 flow [2024-06-21 20:16:39,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11388, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11722, PETRI_PLACES=556, PETRI_TRANSITIONS=723} [2024-06-21 20:16:39,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 514 predicate places. [2024-06-21 20:16:39,438 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 723 transitions, 11722 flow [2024-06-21 20:16:39,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:39,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:39,439 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, 1] [2024-06-21 20:16:39,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 20:16:39,439 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:39,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:39,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1004014746, now seen corresponding path program 3 times [2024-06-21 20:16:39,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:39,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876383160] [2024-06-21 20:16:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:39,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:39,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876383160] [2024-06-21 20:16:39,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876383160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:39,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:39,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:16:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042515952] [2024-06-21 20:16:39,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:39,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:16:39,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:16:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:16:39,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:39,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 723 transitions, 11722 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:39,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:39,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:39,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:41,565 INFO L124 PetriNetUnfolderBase]: 3846/6550 cut-off events. [2024-06-21 20:16:41,566 INFO L125 PetriNetUnfolderBase]: For 1283967/1283967 co-relation queries the response was YES. [2024-06-21 20:16:41,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55859 conditions, 6550 events. 3846/6550 cut-off events. For 1283967/1283967 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 46414 event pairs, 676 based on Foata normal form. 1/6549 useless extension candidates. Maximal degree in co-relation 55610. Up to 5772 conditions per place. [2024-06-21 20:16:41,662 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 649 selfloop transitions, 94 changer transitions 0/751 dead transitions. [2024-06-21 20:16:41,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 751 transitions, 13278 flow [2024-06-21 20:16:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:16:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:16:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 20:16:41,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-21 20:16:41,663 INFO L175 Difference]: Start difference. First operand has 556 places, 723 transitions, 11722 flow. Second operand 9 states and 215 transitions. [2024-06-21 20:16:41,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 751 transitions, 13278 flow [2024-06-21 20:16:50,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 751 transitions, 12983 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:50,911 INFO L231 Difference]: Finished difference. Result has 559 places, 723 transitions, 11621 flow [2024-06-21 20:16:50,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11427, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11621, PETRI_PLACES=559, PETRI_TRANSITIONS=723} [2024-06-21 20:16:50,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 517 predicate places. [2024-06-21 20:16:50,911 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 723 transitions, 11621 flow [2024-06-21 20:16:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:50,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:50,912 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, 1] [2024-06-21 20:16:50,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 20:16:50,912 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:50,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1772401054, now seen corresponding path program 4 times [2024-06-21 20:16:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898394360] [2024-06-21 20:16:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:51,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898394360] [2024-06-21 20:16:51,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898394360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:51,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:51,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:16:51,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490679179] [2024-06-21 20:16:51,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:51,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:16:51,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:16:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:16:51,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:51,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 723 transitions, 11621 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:51,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:51,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:51,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:52,935 INFO L124 PetriNetUnfolderBase]: 3859/6572 cut-off events. [2024-06-21 20:16:52,936 INFO L125 PetriNetUnfolderBase]: For 1311144/1311144 co-relation queries the response was YES. [2024-06-21 20:16:53,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56310 conditions, 6572 events. 3859/6572 cut-off events. For 1311144/1311144 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 46609 event pairs, 676 based on Foata normal form. 1/6571 useless extension candidates. Maximal degree in co-relation 56059. Up to 5783 conditions per place. [2024-06-21 20:16:53,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 651 selfloop transitions, 103 changer transitions 0/762 dead transitions. [2024-06-21 20:16:53,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 762 transitions, 13677 flow [2024-06-21 20:16:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:16:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:16:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 292 transitions. [2024-06-21 20:16:53,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478424015009381 [2024-06-21 20:16:53,035 INFO L175 Difference]: Start difference. First operand has 559 places, 723 transitions, 11621 flow. Second operand 13 states and 292 transitions. [2024-06-21 20:16:53,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 762 transitions, 13677 flow [2024-06-21 20:17:01,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 762 transitions, 13481 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:17:01,848 INFO L231 Difference]: Finished difference. Result has 564 places, 729 transitions, 11779 flow [2024-06-21 20:17:01,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11425, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11779, PETRI_PLACES=564, PETRI_TRANSITIONS=729} [2024-06-21 20:17:01,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-21 20:17:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 729 transitions, 11779 flow [2024-06-21 20:17:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:01,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:01,849 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, 1] [2024-06-21 20:17:01,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 20:17:01,849 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:01,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:01,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2094842726, now seen corresponding path program 5 times [2024-06-21 20:17:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:01,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631845186] [2024-06-21 20:17:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:01,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:01,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:01,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631845186] [2024-06-21 20:17:01,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631845186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:01,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:01,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:17:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111670162] [2024-06-21 20:17:01,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:01,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:17:01,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:17:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:17:02,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:02,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 729 transitions, 11779 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:02,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:02,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:02,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:03,980 INFO L124 PetriNetUnfolderBase]: 3856/6568 cut-off events. [2024-06-21 20:17:03,980 INFO L125 PetriNetUnfolderBase]: For 1312197/1312197 co-relation queries the response was YES. [2024-06-21 20:17:04,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56221 conditions, 6568 events. 3856/6568 cut-off events. For 1312197/1312197 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 46603 event pairs, 676 based on Foata normal form. 1/6567 useless extension candidates. Maximal degree in co-relation 55969. Up to 5786 conditions per place. [2024-06-21 20:17:04,078 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 656 selfloop transitions, 95 changer transitions 0/759 dead transitions. [2024-06-21 20:17:04,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 759 transitions, 13355 flow [2024-06-21 20:17:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:17:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:17:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-21 20:17:04,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676274944567627 [2024-06-21 20:17:04,079 INFO L175 Difference]: Start difference. First operand has 564 places, 729 transitions, 11779 flow. Second operand 11 states and 256 transitions. [2024-06-21 20:17:04,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 759 transitions, 13355 flow Killed by 15