./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_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/safe023_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/safe023_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe023_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 20:16:17,786 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:16:17,863 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:16:17,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:16:17,869 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:16:17,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:16:17,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:16:17,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:16:17,898 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:16:17,902 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:16:17,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:16:17,902 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:16:17,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:16:17,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:16:17,904 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:16:17,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:16:17,905 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:16:17,905 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:16:17,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:16:17,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:16:17,906 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:16:17,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:16:17,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:16:17,907 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:16:17,907 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:16:17,908 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:16:17,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:16:17,908 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:16:17,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:16:17,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:16:17,910 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:16:17,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:16:17,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:16:17,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:16:17,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:16:17,911 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:16:17,911 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:16:17,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:16:17,912 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:16:17,913 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:16:17,913 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:16:17,913 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:16:17,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:16:17,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:16:18,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:16:18,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:16:18,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:16:18,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:16:18,184 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:16:18,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-21 20:16:19,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:16:19,627 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:16:19,627 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-21 20:16:19,638 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07cd904a9/7260ef0081e24e13b79635ab59b1eb8b/FLAGc7d662927 [2024-06-21 20:16:19,652 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07cd904a9/7260ef0081e24e13b79635ab59b1eb8b [2024-06-21 20:16:19,654 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:16:19,655 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:16:19,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe023_tso.yml/witness.yml [2024-06-21 20:16:19,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:16:19,757 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:16:19,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:16:19,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:16:19,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:16:19,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:16:19" (1/2) ... [2024-06-21 20:16:19,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eda0881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:19, skipping insertion in model container [2024-06-21 20:16:19,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:16:19" (1/2) ... [2024-06-21 20:16:19,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@463d37e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:19, skipping insertion in model container [2024-06-21 20:16:19,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:19" (2/2) ... [2024-06-21 20:16:19,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eda0881 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:16:19, skipping insertion in model container [2024-06-21 20:16:19,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:19" (2/2) ... [2024-06-21 20:16:19,767 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:16:19,821 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:16:19,824 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! 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_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_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 20:16:19,824 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! 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_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_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 20:16:19,825 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! 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_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_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 20:16:19,825 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:16:19,825 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 20:16:19,871 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:16:20,144 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:16:20,152 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:16:20,250 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:16:20,289 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:16:20,289 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:16:20 WrapperNode [2024-06-21 20:16:20,290 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:16:20,291 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:16:20,291 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:16:20,291 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:16:20,297 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,320 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,340 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 20:16:20,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:16:20,342 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:16:20,342 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:16:20,342 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:16:20,351 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,351 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,354 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,366 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 20:16:20,367 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,367 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,373 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,375 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,377 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,378 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:16:20,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:16:20,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:16:20,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:16:20,382 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 08:16:20" (1/1) ... [2024-06-21 20:16:20,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:16:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:16:20,406 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 20:16:20,414 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 20:16:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:16:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:16:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:16:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:16:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:16:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:16:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:16:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:16:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:16:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:16:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:16:20,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:16:20,451 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 20:16:20,547 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:16:20,548 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:16:20,727 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:16:20,727 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:16:20,846 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:16:20,847 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:16:20,847 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:16:20 BoogieIcfgContainer [2024-06-21 20:16:20,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:16:20,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:16:20,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:16:20,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:16:20,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:16:19" (1/4) ... [2024-06-21 20:16:20,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cf9503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:16:20, skipping insertion in model container [2024-06-21 20:16:20,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:19" (2/4) ... [2024-06-21 20:16:20,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cf9503 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:16:20, skipping insertion in model container [2024-06-21 20:16:20,855 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 08:16:20" (3/4) ... [2024-06-21 20:16:20,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cf9503 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:16:20, skipping insertion in model container [2024-06-21 20:16:20,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:16:20" (4/4) ... [2024-06-21 20:16:20,857 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-21 20:16:20,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:16:20,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:16:20,875 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:16:20,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:16:20,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:16:21,011 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 20:16:21,014 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:16:21,016 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 20:16:21,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:16:21,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 20:16:21,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:16:21,044 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;@7576d349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:16:21,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:16:21,051 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:16:21,052 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:16:21,052 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:16:21,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:21,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:16:21,053 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 20:16:21,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-21 20:16:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:21,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167887840] [2024-06-21 20:16:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:21,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167887840] [2024-06-21 20:16:21,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167887840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:21,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:21,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:16:21,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803003220] [2024-06-21 20:16:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:16:21,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:16:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:16:21,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-21 20:16:21,541 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 20:16:21,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:21,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-21 20:16:21,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:21,789 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-21 20:16:21,790 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 20:16:21,796 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 20:16:21,803 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 20:16:21,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-21 20:16:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:16:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:16:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-21 20:16:21,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-21 20:16:21,819 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-21 20:16:21,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-21 20:16:21,822 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 20:16:21,825 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 20:16:21,827 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 20:16:21,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 20:16:21,831 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 20:16:21,831 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 20:16:21,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:21,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:21,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:16:21,832 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 20:16:21,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-21 20:16:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:21,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549994226] [2024-06-21 20:16:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:22,020 INFO 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 20:16:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549994226] [2024-06-21 20:16:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549994226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:22,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:22,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:16:22,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16543179] [2024-06-21 20:16:22,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:22,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:16:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:16:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:16:22,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:22,062 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 20:16:22,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:22,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:22,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:22,269 INFO L124 PetriNetUnfolderBase]: 781/1324 cut-off events. [2024-06-21 20:16:22,269 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-21 20:16:22,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 1324 events. 781/1324 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6753 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-21 20:16:22,278 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 42 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-21 20:16:22,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 278 flow [2024-06-21 20:16:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-21 20:16:22,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2024-06-21 20:16:22,283 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 115 transitions. [2024-06-21 20:16:22,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 278 flow [2024-06-21 20:16:22,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:22,287 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 171 flow [2024-06-21 20:16:22,287 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-06-21 20:16:22,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-21 20:16:22,288 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 171 flow [2024-06-21 20:16:22,289 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 20:16:22,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:22,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:22,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:16:22,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:22,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1652603324, now seen corresponding path program 1 times [2024-06-21 20:16:22,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:22,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226869592] [2024-06-21 20:16:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:22,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:22,467 INFO 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 20:16:22,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226869592] [2024-06-21 20:16:22,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226869592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:22,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:22,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:16:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483483248] [2024-06-21 20:16:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:22,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:16:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:16:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:16:22,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:22,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:22,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:22,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:22,693 INFO L124 PetriNetUnfolderBase]: 789/1356 cut-off events. [2024-06-21 20:16:22,693 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-21 20:16:22,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1356 events. 789/1356 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7094 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-21 20:16:22,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 50 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 20:16:22,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 399 flow [2024-06-21 20:16:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-21 20:16:22,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.697560975609756 [2024-06-21 20:16:22,708 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 171 flow. Second operand 5 states and 143 transitions. [2024-06-21 20:16:22,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 399 flow [2024-06-21 20:16:22,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 397 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 20:16:22,712 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 246 flow [2024-06-21 20:16:22,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-06-21 20:16:22,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 20:16:22,713 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 246 flow [2024-06-21 20:16:22,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:22,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:22,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:22,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:16:22,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:22,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:22,715 INFO L85 PathProgramCache]: Analyzing trace with hash 627902782, now seen corresponding path program 1 times [2024-06-21 20:16:22,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:22,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892799753] [2024-06-21 20:16:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:22,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:22,834 INFO 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 20:16:22,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892799753] [2024-06-21 20:16:22,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892799753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:22,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:22,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:16:22,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422521138] [2024-06-21 20:16:22,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:22,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:16:22,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:22,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:16:22,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:16:22,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:22,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:22,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:22,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:22,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:23,011 INFO L124 PetriNetUnfolderBase]: 773/1296 cut-off events. [2024-06-21 20:16:23,011 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-21 20:16:23,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 1296 events. 773/1296 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6611 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-21 20:16:23,021 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 44 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2024-06-21 20:16:23,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 395 flow [2024-06-21 20:16:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 20:16:23,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-21 20:16:23,023 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 246 flow. Second operand 4 states and 109 transitions. [2024-06-21 20:16:23,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 395 flow [2024-06-21 20:16:23,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 381 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:23,031 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 285 flow [2024-06-21 20:16:23,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-06-21 20:16:23,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-21 20:16:23,033 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 285 flow [2024-06-21 20:16:23,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:23,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:23,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:23,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:16:23,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:23,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:23,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1847914485, now seen corresponding path program 1 times [2024-06-21 20:16:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:23,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122343576] [2024-06-21 20:16:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:23,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:23,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122343576] [2024-06-21 20:16:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122343576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:23,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377979969] [2024-06-21 20:16:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:23,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:23,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 285 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 20:16:23,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:23,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:23,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:23,483 INFO L124 PetriNetUnfolderBase]: 781/1329 cut-off events. [2024-06-21 20:16:23,483 INFO L125 PetriNetUnfolderBase]: For 2268/2351 co-relation queries the response was YES. [2024-06-21 20:16:23,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 1329 events. 781/1329 cut-off events. For 2268/2351 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6835 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-21 20:16:23,493 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 20 changer transitions 0/83 dead transitions. [2024-06-21 20:16:23,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 531 flow [2024-06-21 20:16:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 20:16:23,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6747967479674797 [2024-06-21 20:16:23,495 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 285 flow. Second operand 6 states and 166 transitions. [2024-06-21 20:16:23,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 531 flow [2024-06-21 20:16:23,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 521 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:23,505 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 341 flow [2024-06-21 20:16:23,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-21 20:16:23,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-21 20:16:23,508 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 341 flow [2024-06-21 20:16:23,510 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 20:16:23,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:23,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:23,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:16:23,510 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 20:16:23,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2009849483, now seen corresponding path program 1 times [2024-06-21 20:16:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:23,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912553378] [2024-06-21 20:16:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:23,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:23,684 INFO 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 20:16:23,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:23,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912553378] [2024-06-21 20:16:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912553378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:23,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:23,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:16:23,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219536599] [2024-06-21 20:16:23,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:23,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:16:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:16:23,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:16:23,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:23,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 341 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 20:16:23,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:23,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:23,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:23,928 INFO L124 PetriNetUnfolderBase]: 955/1564 cut-off events. [2024-06-21 20:16:23,928 INFO L125 PetriNetUnfolderBase]: For 3559/3559 co-relation queries the response was YES. [2024-06-21 20:16:23,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1564 events. 955/1564 cut-off events. For 3559/3559 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7926 event pairs, 342 based on Foata normal form. 4/1562 useless extension candidates. Maximal degree in co-relation 5328. Up to 1371 conditions per place. [2024-06-21 20:16:23,941 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 65 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2024-06-21 20:16:23,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 671 flow [2024-06-21 20:16:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 20:16:23,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-21 20:16:23,942 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 341 flow. Second operand 5 states and 131 transitions. [2024-06-21 20:16:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 671 flow [2024-06-21 20:16:23,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 609 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:23,950 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 444 flow [2024-06-21 20:16:23,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2024-06-21 20:16:23,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-21 20:16:23,953 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 444 flow [2024-06-21 20:16:23,953 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 20:16:23,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:23,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:23,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:16:23,954 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 20:16:23,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1285390740, now seen corresponding path program 1 times [2024-06-21 20:16:23,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:23,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937646017] [2024-06-21 20:16:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:24,074 INFO 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 20:16:24,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:24,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937646017] [2024-06-21 20:16:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937646017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:24,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:16:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671570348] [2024-06-21 20:16:24,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:16:24,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:16:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:16:24,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:24,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 444 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:24,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:24,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:24,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:24,286 INFO L124 PetriNetUnfolderBase]: 966/1593 cut-off events. [2024-06-21 20:16:24,286 INFO L125 PetriNetUnfolderBase]: For 4428/4434 co-relation queries the response was YES. [2024-06-21 20:16:24,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5800 conditions, 1593 events. 966/1593 cut-off events. For 4428/4434 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8114 event pairs, 343 based on Foata normal form. 2/1589 useless extension candidates. Maximal degree in co-relation 5773. Up to 1383 conditions per place. [2024-06-21 20:16:24,299 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-21 20:16:24,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 731 flow [2024-06-21 20:16:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:16:24,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-21 20:16:24,301 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 444 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:16:24,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 731 flow [2024-06-21 20:16:24,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 725 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 20:16:24,309 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 547 flow [2024-06-21 20:16:24,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-21 20:16:24,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 20:16:24,309 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 547 flow [2024-06-21 20:16:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:24,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:24,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:24,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:16:24,310 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 20:16:24,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1269945300, now seen corresponding path program 2 times [2024-06-21 20:16:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:24,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736673056] [2024-06-21 20:16:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:24,422 INFO 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 20:16:24,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:24,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736673056] [2024-06-21 20:16:24,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736673056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:24,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:24,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:16:24,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679419392] [2024-06-21 20:16:24,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:24,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:16:24,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:16:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:16:24,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:24,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 547 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:24,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:24,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:24,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:24,632 INFO L124 PetriNetUnfolderBase]: 961/1582 cut-off events. [2024-06-21 20:16:24,633 INFO L125 PetriNetUnfolderBase]: For 5683/5689 co-relation queries the response was YES. [2024-06-21 20:16:24,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6074 conditions, 1582 events. 961/1582 cut-off events. For 5683/5689 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8053 event pairs, 346 based on Foata normal form. 6/1581 useless extension candidates. Maximal degree in co-relation 6042. Up to 1378 conditions per place. [2024-06-21 20:16:24,647 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-21 20:16:24,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 759 flow [2024-06-21 20:16:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:16:24,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-21 20:16:24,648 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 547 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:16:24,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 759 flow [2024-06-21 20:16:24,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 742 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:24,658 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 582 flow [2024-06-21 20:16:24,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 20:16:24,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-21 20:16:24,659 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 582 flow [2024-06-21 20:16:24,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:24,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:24,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:24,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:16:24,660 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 20:16:24,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1269955220, now seen corresponding path program 1 times [2024-06-21 20:16:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:24,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923753707] [2024-06-21 20:16:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:24,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:24,795 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 20:16:24,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:24,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923753707] [2024-06-21 20:16:24,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923753707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:24,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:24,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:24,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970665331] [2024-06-21 20:16:24,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:24,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:24,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:24,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:24,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:24,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:24,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 582 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 20:16:24,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:24,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:24,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:25,059 INFO L124 PetriNetUnfolderBase]: 970/1590 cut-off events. [2024-06-21 20:16:25,060 INFO L125 PetriNetUnfolderBase]: For 6733/6733 co-relation queries the response was YES. [2024-06-21 20:16:25,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 1590 events. 970/1590 cut-off events. For 6733/6733 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8048 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6198. Up to 1357 conditions per place. [2024-06-21 20:16:25,076 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-21 20:16:25,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 832 flow [2024-06-21 20:16:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:16:25,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:16:25,078 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 582 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:16:25,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 832 flow [2024-06-21 20:16:25,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 806 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:25,091 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 634 flow [2024-06-21 20:16:25,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-21 20:16:25,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-21 20:16:25,092 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 634 flow [2024-06-21 20:16:25,093 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 20:16:25,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:25,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:25,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:16:25,093 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 20:16:25,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1804174214, now seen corresponding path program 1 times [2024-06-21 20:16:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:25,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595039415] [2024-06-21 20:16:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:25,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:25,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595039415] [2024-06-21 20:16:25,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595039415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:25,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:25,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:25,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69348228] [2024-06-21 20:16:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:25,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:25,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:25,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:25,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:25,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 634 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:25,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:25,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:25,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:25,517 INFO L124 PetriNetUnfolderBase]: 925/1552 cut-off events. [2024-06-21 20:16:25,517 INFO L125 PetriNetUnfolderBase]: For 9044/9077 co-relation queries the response was YES. [2024-06-21 20:16:25,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6486 conditions, 1552 events. 925/1552 cut-off events. For 9044/9077 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8142 event pairs, 286 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6450. Up to 1266 conditions per place. [2024-06-21 20:16:25,530 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-21 20:16:25,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 940 flow [2024-06-21 20:16:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 20:16:25,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:16:25,531 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 634 flow. Second operand 6 states and 164 transitions. [2024-06-21 20:16:25,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 940 flow [2024-06-21 20:16:25,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 109 transitions, 886 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:25,553 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 656 flow [2024-06-21 20:16:25,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=656, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-21 20:16:25,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-21 20:16:25,554 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 656 flow [2024-06-21 20:16:25,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:25,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:25,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:25,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:16:25,555 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 20:16:25,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash 166940894, now seen corresponding path program 2 times [2024-06-21 20:16:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:25,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713899745] [2024-06-21 20:16:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:25,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:25,680 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 20:16:25,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:25,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713899745] [2024-06-21 20:16:25,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713899745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:25,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:25,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:16:25,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616469647] [2024-06-21 20:16:25,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:25,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:16:25,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:25,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:16:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:16:25,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:25,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 656 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:25,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:25,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:25,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:25,914 INFO L124 PetriNetUnfolderBase]: 934/1552 cut-off events. [2024-06-21 20:16:25,914 INFO L125 PetriNetUnfolderBase]: For 10164/10192 co-relation queries the response was YES. [2024-06-21 20:16:25,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6631 conditions, 1552 events. 934/1552 cut-off events. For 10164/10192 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8117 event pairs, 297 based on Foata normal form. 21/1515 useless extension candidates. Maximal degree in co-relation 6594. Up to 1283 conditions per place. [2024-06-21 20:16:25,929 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 20:16:25,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 856 flow [2024-06-21 20:16:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 20:16:25,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-21 20:16:25,931 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 656 flow. Second operand 5 states and 133 transitions. [2024-06-21 20:16:25,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 856 flow [2024-06-21 20:16:25,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 800 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:25,945 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 661 flow [2024-06-21 20:16:25,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-21 20:16:25,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 20:16:25,946 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 661 flow [2024-06-21 20:16:25,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:25,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:25,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:25,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:16:25,947 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 20:16:25,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1860072281, now seen corresponding path program 1 times [2024-06-21 20:16:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:25,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805719717] [2024-06-21 20:16:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:26,106 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 20:16:26,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:26,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805719717] [2024-06-21 20:16:26,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805719717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:26,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:26,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:26,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573358146] [2024-06-21 20:16:26,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:26,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:26,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:26,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:26,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:26,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 661 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 20:16:26,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:26,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:26,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:26,408 INFO L124 PetriNetUnfolderBase]: 1005/1660 cut-off events. [2024-06-21 20:16:26,408 INFO L125 PetriNetUnfolderBase]: For 10494/10500 co-relation queries the response was YES. [2024-06-21 20:16:26,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6973 conditions, 1660 events. 1005/1660 cut-off events. For 10494/10500 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8494 event pairs, 317 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 6935. Up to 1356 conditions per place. [2024-06-21 20:16:26,424 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-21 20:16:26,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 132 transitions, 1181 flow [2024-06-21 20:16:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 20:16:26,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-21 20:16:26,426 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 661 flow. Second operand 7 states and 186 transitions. [2024-06-21 20:16:26,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 132 transitions, 1181 flow [2024-06-21 20:16:26,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1100 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:26,490 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 785 flow [2024-06-21 20:16:26,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-21 20:16:26,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 20:16:26,491 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 785 flow [2024-06-21 20:16:26,492 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 20:16:26,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:26,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:26,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:16:26,492 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 20:16:26,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash 880408563, now seen corresponding path program 2 times [2024-06-21 20:16:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:26,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273777670] [2024-06-21 20:16:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:26,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:26,612 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 20:16:26,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273777670] [2024-06-21 20:16:26,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273777670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:26,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:26,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918455726] [2024-06-21 20:16:26,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:26,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:26,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:26,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 785 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 20:16:26,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:26,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:26,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:26,878 INFO L124 PetriNetUnfolderBase]: 1016/1662 cut-off events. [2024-06-21 20:16:26,878 INFO L125 PetriNetUnfolderBase]: For 12293/12293 co-relation queries the response was YES. [2024-06-21 20:16:26,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 1662 events. 1016/1662 cut-off events. For 12293/12293 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8463 event pairs, 327 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 7471. Up to 1368 conditions per place. [2024-06-21 20:16:26,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-21 20:16:26,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1215 flow [2024-06-21 20:16:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:16:26,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 20:16:26,895 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 785 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:16:26,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1215 flow [2024-06-21 20:16:26,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1187 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:26,915 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 888 flow [2024-06-21 20:16:26,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=888, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-21 20:16:26,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 20:16:26,916 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 888 flow [2024-06-21 20:16:26,917 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 20:16:26,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:26,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:26,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:16:26,917 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 20:16:26,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1129250393, now seen corresponding path program 3 times [2024-06-21 20:16:26,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:26,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896764637] [2024-06-21 20:16:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:26,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:27,042 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 20:16:27,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:27,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896764637] [2024-06-21 20:16:27,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896764637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:27,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:27,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:27,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581066654] [2024-06-21 20:16:27,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:27,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:27,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:27,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:27,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:27,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:27,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 888 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 20:16:27,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:27,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:27,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:27,299 INFO L124 PetriNetUnfolderBase]: 1011/1655 cut-off events. [2024-06-21 20:16:27,299 INFO L125 PetriNetUnfolderBase]: For 13841/13841 co-relation queries the response was YES. [2024-06-21 20:16:27,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7758 conditions, 1655 events. 1011/1655 cut-off events. For 13841/13841 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8425 event pairs, 327 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 7713. Up to 1363 conditions per place. [2024-06-21 20:16:27,313 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 81 selfloop transitions, 35 changer transitions 0/124 dead transitions. [2024-06-21 20:16:27,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 124 transitions, 1229 flow [2024-06-21 20:16:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:16:27,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:16:27,315 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 888 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:16:27,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 124 transitions, 1229 flow [2024-06-21 20:16:27,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 124 transitions, 1172 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:27,339 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 909 flow [2024-06-21 20:16:27,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-21 20:16:27,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 20:16:27,340 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 909 flow [2024-06-21 20:16:27,340 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 20:16:27,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:27,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:16:27,341 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:27,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1672712781, now seen corresponding path program 4 times [2024-06-21 20:16:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230041298] [2024-06-21 20:16:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:27,459 INFO 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 20:16:27,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230041298] [2024-06-21 20:16:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230041298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:27,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:27,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:27,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158575980] [2024-06-21 20:16:27,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:27,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:27,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:27,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:27,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 909 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 20:16:27,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:27,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:27,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:27,732 INFO L124 PetriNetUnfolderBase]: 1022/1696 cut-off events. [2024-06-21 20:16:27,732 INFO L125 PetriNetUnfolderBase]: For 15889/15895 co-relation queries the response was YES. [2024-06-21 20:16:27,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7997 conditions, 1696 events. 1022/1696 cut-off events. For 15889/15895 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8768 event pairs, 329 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7951. Up to 1375 conditions per place. [2024-06-21 20:16:27,747 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 39 changer transitions 0/133 dead transitions. [2024-06-21 20:16:27,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 1313 flow [2024-06-21 20:16:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 20:16:27,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 20:16:27,748 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 909 flow. Second operand 6 states and 162 transitions. [2024-06-21 20:16:27,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 1313 flow [2024-06-21 20:16:27,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1213 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:27,776 INFO L231 Difference]: Finished difference. Result has 98 places, 106 transitions, 936 flow [2024-06-21 20:16:27,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=936, PETRI_PLACES=98, PETRI_TRANSITIONS=106} [2024-06-21 20:16:27,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 20:16:27,777 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 106 transitions, 936 flow [2024-06-21 20:16:27,777 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 20:16:27,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:27,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:27,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:16:27,778 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 20:16:27,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:27,779 INFO L85 PathProgramCache]: Analyzing trace with hash 646738483, now seen corresponding path program 5 times [2024-06-21 20:16:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:27,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583217040] [2024-06-21 20:16:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:27,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:27,901 INFO 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 20:16:27,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:27,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583217040] [2024-06-21 20:16:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583217040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:27,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:27,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435090802] [2024-06-21 20:16:27,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:27,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:27,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:27,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:27,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:27,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 106 transitions, 936 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 20:16:27,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:27,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:27,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:28,183 INFO L124 PetriNetUnfolderBase]: 1033/1707 cut-off events. [2024-06-21 20:16:28,183 INFO L125 PetriNetUnfolderBase]: For 17820/17826 co-relation queries the response was YES. [2024-06-21 20:16:28,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8254 conditions, 1707 events. 1033/1707 cut-off events. For 17820/17826 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8820 event pairs, 331 based on Foata normal form. 6/1702 useless extension candidates. Maximal degree in co-relation 8207. Up to 1387 conditions per place. [2024-06-21 20:16:28,200 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 82 selfloop transitions, 41 changer transitions 0/131 dead transitions. [2024-06-21 20:16:28,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1332 flow [2024-06-21 20:16:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:16:28,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:16:28,202 INFO L175 Difference]: Start difference. First operand has 98 places, 106 transitions, 936 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:16:28,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1332 flow [2024-06-21 20:16:28,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 131 transitions, 1244 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:28,233 INFO L231 Difference]: Finished difference. Result has 100 places, 110 transitions, 976 flow [2024-06-21 20:16:28,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=976, PETRI_PLACES=100, PETRI_TRANSITIONS=110} [2024-06-21 20:16:28,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 20:16:28,235 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 110 transitions, 976 flow [2024-06-21 20:16:28,235 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 20:16:28,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:28,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:28,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:16:28,236 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 20:16:28,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:28,237 INFO L85 PathProgramCache]: Analyzing trace with hash 390237973, now seen corresponding path program 6 times [2024-06-21 20:16:28,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:28,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904620294] [2024-06-21 20:16:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:28,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:28,375 INFO 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 20:16:28,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:28,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904620294] [2024-06-21 20:16:28,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904620294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:28,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:28,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212135221] [2024-06-21 20:16:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:28,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:28,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:28,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 110 transitions, 976 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 20:16:28,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:28,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:28,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:28,656 INFO L124 PetriNetUnfolderBase]: 1028/1710 cut-off events. [2024-06-21 20:16:28,657 INFO L125 PetriNetUnfolderBase]: For 18917/18923 co-relation queries the response was YES. [2024-06-21 20:16:28,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8307 conditions, 1710 events. 1028/1710 cut-off events. For 18917/18923 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8903 event pairs, 329 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8259. Up to 1382 conditions per place. [2024-06-21 20:16:28,672 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 42 changer transitions 0/132 dead transitions. [2024-06-21 20:16:28,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 132 transitions, 1280 flow [2024-06-21 20:16:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:16:28,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 20:16:28,674 INFO L175 Difference]: Start difference. First operand has 100 places, 110 transitions, 976 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:16:28,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 132 transitions, 1280 flow [2024-06-21 20:16:28,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1232 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:28,709 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 1020 flow [2024-06-21 20:16:28,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2024-06-21 20:16:28,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-21 20:16:28,710 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 1020 flow [2024-06-21 20:16:28,711 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 20:16:28,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:28,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:28,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:16:28,711 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:28,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 268217995, now seen corresponding path program 1 times [2024-06-21 20:16:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938595880] [2024-06-21 20:16:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:28,886 INFO 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 20:16:28,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:28,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938595880] [2024-06-21 20:16:28,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938595880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:28,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:28,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:28,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259790865] [2024-06-21 20:16:28,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:28,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:28,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:28,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:28,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 1020 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 20:16:28,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:28,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:28,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:29,153 INFO L124 PetriNetUnfolderBase]: 1045/1736 cut-off events. [2024-06-21 20:16:29,154 INFO L125 PetriNetUnfolderBase]: For 21539/21545 co-relation queries the response was YES. [2024-06-21 20:16:29,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8555 conditions, 1736 events. 1045/1736 cut-off events. For 21539/21545 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9004 event pairs, 309 based on Foata normal form. 4/1734 useless extension candidates. Maximal degree in co-relation 8505. Up to 1487 conditions per place. [2024-06-21 20:16:29,170 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 22 changer transitions 0/135 dead transitions. [2024-06-21 20:16:29,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 135 transitions, 1348 flow [2024-06-21 20:16:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:16:29,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:16:29,172 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 1020 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:16:29,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 135 transitions, 1348 flow [2024-06-21 20:16:29,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 135 transitions, 1258 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:29,209 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 1001 flow [2024-06-21 20:16:29,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1001, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-06-21 20:16:29,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-21 20:16:29,210 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 1001 flow [2024-06-21 20:16:29,211 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 20:16:29,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:29,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:29,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:16:29,211 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 20:16:29,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:29,212 INFO L85 PathProgramCache]: Analyzing trace with hash 397395749, now seen corresponding path program 2 times [2024-06-21 20:16:29,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:29,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004361143] [2024-06-21 20:16:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:29,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:29,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004361143] [2024-06-21 20:16:29,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004361143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:29,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:29,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787494450] [2024-06-21 20:16:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:29,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:29,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:29,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 1001 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 20:16:29,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:29,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:29,642 INFO L124 PetriNetUnfolderBase]: 1062/1764 cut-off events. [2024-06-21 20:16:29,643 INFO L125 PetriNetUnfolderBase]: For 24166/24172 co-relation queries the response was YES. [2024-06-21 20:16:29,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 1764 events. 1062/1764 cut-off events. For 24166/24172 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9229 event pairs, 317 based on Foata normal form. 8/1765 useless extension candidates. Maximal degree in co-relation 8783. Up to 1514 conditions per place. [2024-06-21 20:16:29,657 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 106 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2024-06-21 20:16:29,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 134 transitions, 1323 flow [2024-06-21 20:16:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:16:29,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 20:16:29,660 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 1001 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:16:29,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 134 transitions, 1323 flow [2024-06-21 20:16:29,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 134 transitions, 1280 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:29,693 INFO L231 Difference]: Finished difference. Result has 109 places, 114 transitions, 1029 flow [2024-06-21 20:16:29,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1029, PETRI_PLACES=109, PETRI_TRANSITIONS=114} [2024-06-21 20:16:29,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 20:16:29,694 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 114 transitions, 1029 flow [2024-06-21 20:16:29,694 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 20:16:29,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:29,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:29,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:16:29,695 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 20:16:29,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:29,695 INFO L85 PathProgramCache]: Analyzing trace with hash 656269619, now seen corresponding path program 3 times [2024-06-21 20:16:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470801397] [2024-06-21 20:16:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:29,820 INFO 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 20:16:29,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:29,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470801397] [2024-06-21 20:16:29,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470801397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:29,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:29,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:29,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190314403] [2024-06-21 20:16:29,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:29,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:29,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:29,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:29,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:29,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 114 transitions, 1029 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 20:16:29,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:29,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:29,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:30,101 INFO L124 PetriNetUnfolderBase]: 1054/1751 cut-off events. [2024-06-21 20:16:30,102 INFO L125 PetriNetUnfolderBase]: For 26155/26161 co-relation queries the response was YES. [2024-06-21 20:16:30,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 1751 events. 1054/1751 cut-off events. For 26155/26161 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9153 event pairs, 286 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 8866. Up to 1425 conditions per place. [2024-06-21 20:16:30,118 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 103 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-21 20:16:30,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 137 transitions, 1363 flow [2024-06-21 20:16:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:16:30,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:16:30,120 INFO L175 Difference]: Start difference. First operand has 109 places, 114 transitions, 1029 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:16:30,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 137 transitions, 1363 flow [2024-06-21 20:16:30,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 137 transitions, 1310 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:30,161 INFO L231 Difference]: Finished difference. Result has 111 places, 116 transitions, 1063 flow [2024-06-21 20:16:30,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=111, PETRI_TRANSITIONS=116} [2024-06-21 20:16:30,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-21 20:16:30,161 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 116 transitions, 1063 flow [2024-06-21 20:16:30,162 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 20:16:30,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:30,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:30,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:16:30,162 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 20:16:30,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1358205659, now seen corresponding path program 1 times [2024-06-21 20:16:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729937404] [2024-06-21 20:16:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:30,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:30,302 INFO 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 20:16:30,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:30,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729937404] [2024-06-21 20:16:30,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729937404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:30,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:30,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36906267] [2024-06-21 20:16:30,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:30,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:30,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:30,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:30,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 116 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:30,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:30,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:30,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:30,666 INFO L124 PetriNetUnfolderBase]: 1055/1777 cut-off events. [2024-06-21 20:16:30,667 INFO L125 PetriNetUnfolderBase]: For 31339/31373 co-relation queries the response was YES. [2024-06-21 20:16:30,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9407 conditions, 1777 events. 1055/1777 cut-off events. For 31339/31373 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9483 event pairs, 183 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9354. Up to 1341 conditions per place. [2024-06-21 20:16:30,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 89 selfloop transitions, 40 changer transitions 0/157 dead transitions. [2024-06-21 20:16:30,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 157 transitions, 1525 flow [2024-06-21 20:16:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 20:16:30,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-21 20:16:30,687 INFO L175 Difference]: Start difference. First operand has 111 places, 116 transitions, 1063 flow. Second operand 8 states and 211 transitions. [2024-06-21 20:16:30,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 157 transitions, 1525 flow [2024-06-21 20:16:30,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 157 transitions, 1456 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:30,735 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 1117 flow [2024-06-21 20:16:30,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1117, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2024-06-21 20:16:30,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 20:16:30,736 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 1117 flow [2024-06-21 20:16:30,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:30,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:30,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:30,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:16:30,736 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:30,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:30,737 INFO L85 PathProgramCache]: Analyzing trace with hash 577333285, now seen corresponding path program 2 times [2024-06-21 20:16:30,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:30,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575425142] [2024-06-21 20:16:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:30,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:30,882 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 20:16:30,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:30,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575425142] [2024-06-21 20:16:30,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575425142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:30,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:30,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745259348] [2024-06-21 20:16:30,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:30,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:30,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:30,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:30,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 1117 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:30,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:30,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:30,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:31,249 INFO L124 PetriNetUnfolderBase]: 1043/1757 cut-off events. [2024-06-21 20:16:31,249 INFO L125 PetriNetUnfolderBase]: For 33070/33105 co-relation queries the response was YES. [2024-06-21 20:16:31,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9480 conditions, 1757 events. 1043/1757 cut-off events. For 33070/33105 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9405 event pairs, 250 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9426. Up to 1409 conditions per place. [2024-06-21 20:16:31,266 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 87 selfloop transitions, 35 changer transitions 0/150 dead transitions. [2024-06-21 20:16:31,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 150 transitions, 1437 flow [2024-06-21 20:16:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 20:16:31,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-21 20:16:31,267 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 1117 flow. Second operand 7 states and 185 transitions. [2024-06-21 20:16:31,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 150 transitions, 1437 flow [2024-06-21 20:16:31,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 150 transitions, 1374 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:31,309 INFO L231 Difference]: Finished difference. Result has 118 places, 120 transitions, 1132 flow [2024-06-21 20:16:31,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1132, PETRI_PLACES=118, PETRI_TRANSITIONS=120} [2024-06-21 20:16:31,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 20:16:31,309 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 120 transitions, 1132 flow [2024-06-21 20:16:31,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:31,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:31,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:31,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:16:31,310 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 20:16:31,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash 81360923, now seen corresponding path program 3 times [2024-06-21 20:16:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:31,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882244952] [2024-06-21 20:16:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:31,421 INFO 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 20:16:31,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:31,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882244952] [2024-06-21 20:16:31,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882244952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:31,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:31,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:31,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779903067] [2024-06-21 20:16:31,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:31,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:31,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:31,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:31,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:31,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 120 transitions, 1132 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:31,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:31,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:31,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:31,698 INFO L124 PetriNetUnfolderBase]: 1035/1729 cut-off events. [2024-06-21 20:16:31,698 INFO L125 PetriNetUnfolderBase]: For 34703/34732 co-relation queries the response was YES. [2024-06-21 20:16:31,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9469 conditions, 1729 events. 1035/1729 cut-off events. For 34703/34732 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9234 event pairs, 255 based on Foata normal form. 6/1667 useless extension candidates. Maximal degree in co-relation 9413. Up to 1397 conditions per place. [2024-06-21 20:16:31,715 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 35 changer transitions 0/142 dead transitions. [2024-06-21 20:16:31,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 142 transitions, 1430 flow [2024-06-21 20:16:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:16:31,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:16:31,717 INFO L175 Difference]: Start difference. First operand has 118 places, 120 transitions, 1132 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:16:31,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 142 transitions, 1430 flow [2024-06-21 20:16:31,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 142 transitions, 1351 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:31,766 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 1155 flow [2024-06-21 20:16:31,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1155, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-06-21 20:16:31,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 20:16:31,767 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 1155 flow [2024-06-21 20:16:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:31,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:31,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:31,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:16:31,768 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 20:16:31,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 643570273, now seen corresponding path program 1 times [2024-06-21 20:16:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:31,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188856532] [2024-06-21 20:16:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:31,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:31,900 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 20:16:31,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:31,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188856532] [2024-06-21 20:16:31,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188856532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:31,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:31,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:31,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058029699] [2024-06-21 20:16:31,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:31,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:31,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:31,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:31,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 1155 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 20:16:31,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:31,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:31,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:32,167 INFO L124 PetriNetUnfolderBase]: 1119/1866 cut-off events. [2024-06-21 20:16:32,167 INFO L125 PetriNetUnfolderBase]: For 33990/33996 co-relation queries the response was YES. [2024-06-21 20:16:32,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10069 conditions, 1866 events. 1119/1866 cut-off events. For 33990/33996 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9873 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 10012. Up to 1590 conditions per place. [2024-06-21 20:16:32,183 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 34 changer transitions 0/156 dead transitions. [2024-06-21 20:16:32,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 156 transitions, 1756 flow [2024-06-21 20:16:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:16:32,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:16:32,185 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 1155 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:16:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 156 transitions, 1756 flow [2024-06-21 20:16:32,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1668 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:32,243 INFO L231 Difference]: Finished difference. Result has 122 places, 138 transitions, 1348 flow [2024-06-21 20:16:32,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1348, PETRI_PLACES=122, PETRI_TRANSITIONS=138} [2024-06-21 20:16:32,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 20:16:32,244 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 138 transitions, 1348 flow [2024-06-21 20:16:32,244 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 20:16:32,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:32,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:32,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:16:32,245 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 20:16:32,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:32,245 INFO L85 PathProgramCache]: Analyzing trace with hash 208208865, now seen corresponding path program 2 times [2024-06-21 20:16:32,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:32,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660161790] [2024-06-21 20:16:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:32,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:32,351 INFO 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 20:16:32,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660161790] [2024-06-21 20:16:32,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660161790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:32,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:32,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774519571] [2024-06-21 20:16:32,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:32,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:32,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:32,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:32,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 138 transitions, 1348 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 20:16:32,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:32,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:32,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:32,640 INFO L124 PetriNetUnfolderBase]: 1129/1884 cut-off events. [2024-06-21 20:16:32,640 INFO L125 PetriNetUnfolderBase]: For 36944/36950 co-relation queries the response was YES. [2024-06-21 20:16:32,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10505 conditions, 1884 events. 1129/1884 cut-off events. For 36944/36950 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10010 event pairs, 280 based on Foata normal form. 6/1886 useless extension candidates. Maximal degree in co-relation 10445. Up to 1600 conditions per place. [2024-06-21 20:16:32,658 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 113 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-21 20:16:32,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 159 transitions, 1837 flow [2024-06-21 20:16:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 20:16:32,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-21 20:16:32,660 INFO L175 Difference]: Start difference. First operand has 122 places, 138 transitions, 1348 flow. Second operand 5 states and 133 transitions. [2024-06-21 20:16:32,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 159 transitions, 1837 flow [2024-06-21 20:16:32,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 159 transitions, 1797 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-21 20:16:32,725 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 1445 flow [2024-06-21 20:16:32,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1445, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2024-06-21 20:16:32,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 20:16:32,726 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1445 flow [2024-06-21 20:16:32,726 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 20:16:32,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:32,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:32,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:16:32,727 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 20:16:32,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash 208654335, now seen corresponding path program 3 times [2024-06-21 20:16:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:32,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445485726] [2024-06-21 20:16:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:32,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:32,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445485726] [2024-06-21 20:16:32,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445485726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:32,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:32,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884096487] [2024-06-21 20:16:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:32,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:32,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:32,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:32,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 1445 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 20:16:32,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:32,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:32,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:33,168 INFO L124 PetriNetUnfolderBase]: 1149/1913 cut-off events. [2024-06-21 20:16:33,169 INFO L125 PetriNetUnfolderBase]: For 39567/39567 co-relation queries the response was YES. [2024-06-21 20:16:33,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10916 conditions, 1913 events. 1149/1913 cut-off events. For 39567/39567 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10095 event pairs, 271 based on Foata normal form. 2/1913 useless extension candidates. Maximal degree in co-relation 10853. Up to 1651 conditions per place. [2024-06-21 20:16:33,225 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 126 selfloop transitions, 34 changer transitions 0/168 dead transitions. [2024-06-21 20:16:33,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 168 transitions, 1965 flow [2024-06-21 20:16:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 20:16:33,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 20:16:33,226 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 1445 flow. Second operand 5 states and 135 transitions. [2024-06-21 20:16:33,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 168 transitions, 1965 flow [2024-06-21 20:16:33,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 168 transitions, 1869 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:33,302 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1576 flow [2024-06-21 20:16:33,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1576, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2024-06-21 20:16:33,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 20:16:33,303 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1576 flow [2024-06-21 20:16:33,304 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 20:16:33,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:33,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:33,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:16:33,304 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 20:16:33,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 8050793, now seen corresponding path program 1 times [2024-06-21 20:16:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:33,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599771690] [2024-06-21 20:16:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:33,430 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 20:16:33,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:33,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599771690] [2024-06-21 20:16:33,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599771690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:33,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936311320] [2024-06-21 20:16:33,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:33,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:33,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:33,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1576 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 20:16:33,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:33,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:33,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:33,714 INFO L124 PetriNetUnfolderBase]: 1167/1943 cut-off events. [2024-06-21 20:16:33,714 INFO L125 PetriNetUnfolderBase]: For 41823/41823 co-relation queries the response was YES. [2024-06-21 20:16:33,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11165 conditions, 1943 events. 1167/1943 cut-off events. For 41823/41823 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10331 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11101. Up to 1629 conditions per place. [2024-06-21 20:16:33,735 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 132 selfloop transitions, 38 changer transitions 0/178 dead transitions. [2024-06-21 20:16:33,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 2182 flow [2024-06-21 20:16:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:16:33,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:16:33,737 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1576 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:16:33,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 2182 flow [2024-06-21 20:16:33,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 178 transitions, 2133 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:33,814 INFO L231 Difference]: Finished difference. Result has 134 places, 160 transitions, 1740 flow [2024-06-21 20:16:33,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1740, PETRI_PLACES=134, PETRI_TRANSITIONS=160} [2024-06-21 20:16:33,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 20:16:33,815 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 160 transitions, 1740 flow [2024-06-21 20:16:33,815 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 20:16:33,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:33,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:33,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:16:33,816 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 20:16:33,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash 397412073, now seen corresponding path program 2 times [2024-06-21 20:16:33,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:33,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441239027] [2024-06-21 20:16:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:33,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:33,933 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 20:16:33,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441239027] [2024-06-21 20:16:33,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441239027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:33,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:33,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760354366] [2024-06-21 20:16:33,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:33,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:33,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:33,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 160 transitions, 1740 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 20:16:33,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:33,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:33,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:34,277 INFO L124 PetriNetUnfolderBase]: 1187/1978 cut-off events. [2024-06-21 20:16:34,277 INFO L125 PetriNetUnfolderBase]: For 45469/45469 co-relation queries the response was YES. [2024-06-21 20:16:34,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11740 conditions, 1978 events. 1187/1978 cut-off events. For 45469/45469 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10570 event pairs, 283 based on Foata normal form. 2/1974 useless extension candidates. Maximal degree in co-relation 11675. Up to 1712 conditions per place. [2024-06-21 20:16:34,297 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 142 selfloop transitions, 31 changer transitions 0/181 dead transitions. [2024-06-21 20:16:34,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 181 transitions, 2241 flow [2024-06-21 20:16:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:16:34,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 20:16:34,301 INFO L175 Difference]: Start difference. First operand has 134 places, 160 transitions, 1740 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:16:34,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 181 transitions, 2241 flow [2024-06-21 20:16:34,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 181 transitions, 2165 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:34,389 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1864 flow [2024-06-21 20:16:34,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1864, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-21 20:16:34,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-21 20:16:34,395 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1864 flow [2024-06-21 20:16:34,395 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 20:16:34,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:34,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:34,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:16:34,396 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:34,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:34,396 INFO L85 PathProgramCache]: Analyzing trace with hash 397412259, now seen corresponding path program 1 times [2024-06-21 20:16:34,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:34,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455726579] [2024-06-21 20:16:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:34,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455726579] [2024-06-21 20:16:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455726579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:34,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:34,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68347892] [2024-06-21 20:16:34,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:34,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:34,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:34,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1864 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 20:16:34,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:34,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:34,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:34,835 INFO L124 PetriNetUnfolderBase]: 1197/1993 cut-off events. [2024-06-21 20:16:34,835 INFO L125 PetriNetUnfolderBase]: For 48890/48890 co-relation queries the response was YES. [2024-06-21 20:16:34,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11989 conditions, 1993 events. 1197/1993 cut-off events. For 48890/48890 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10633 event pairs, 288 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 11921. Up to 1677 conditions per place. [2024-06-21 20:16:34,858 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2024-06-21 20:16:34,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 187 transitions, 2427 flow [2024-06-21 20:16:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:16:34,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:16:34,860 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1864 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:16:34,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 187 transitions, 2427 flow [2024-06-21 20:16:34,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 187 transitions, 2342 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:34,989 INFO L231 Difference]: Finished difference. Result has 142 places, 172 transitions, 1951 flow [2024-06-21 20:16:34,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1951, PETRI_PLACES=142, PETRI_TRANSITIONS=172} [2024-06-21 20:16:34,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 20:16:34,990 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 172 transitions, 1951 flow [2024-06-21 20:16:34,991 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 20:16:34,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:34,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:34,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:16:34,991 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:34,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash 208423943, now seen corresponding path program 3 times [2024-06-21 20:16:34,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:34,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173330570] [2024-06-21 20:16:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:34,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:35,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:35,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173330570] [2024-06-21 20:16:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173330570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:35,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:35,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:35,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672210677] [2024-06-21 20:16:35,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:35,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:35,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:35,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 172 transitions, 1951 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 20:16:35,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:35,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:35,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:35,447 INFO L124 PetriNetUnfolderBase]: 1199/2001 cut-off events. [2024-06-21 20:16:35,447 INFO L125 PetriNetUnfolderBase]: For 51206/51206 co-relation queries the response was YES. [2024-06-21 20:16:35,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12150 conditions, 2001 events. 1199/2001 cut-off events. For 51206/51206 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10695 event pairs, 280 based on Foata normal form. 2/1997 useless extension candidates. Maximal degree in co-relation 12081. Up to 1677 conditions per place. [2024-06-21 20:16:35,470 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 140 selfloop transitions, 47 changer transitions 0/195 dead transitions. [2024-06-21 20:16:35,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 195 transitions, 2471 flow [2024-06-21 20:16:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:16:35,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:16:35,472 INFO L175 Difference]: Start difference. First operand has 142 places, 172 transitions, 1951 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:16:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 195 transitions, 2471 flow [2024-06-21 20:16:35,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 195 transitions, 2308 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:35,599 INFO L231 Difference]: Finished difference. Result has 145 places, 175 transitions, 1960 flow [2024-06-21 20:16:35,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1960, PETRI_PLACES=145, PETRI_TRANSITIONS=175} [2024-06-21 20:16:35,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 20:16:35,600 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 175 transitions, 1960 flow [2024-06-21 20:16:35,601 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 20:16:35,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:35,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:16:35,601 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:35,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash 208424129, now seen corresponding path program 2 times [2024-06-21 20:16:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:35,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609393720] [2024-06-21 20:16:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:35,708 INFO 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 20:16:35,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:35,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609393720] [2024-06-21 20:16:35,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609393720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:35,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:35,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:35,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986772498] [2024-06-21 20:16:35,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:35,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:35,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:35,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:35,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:35,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 175 transitions, 1960 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 20:16:35,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:35,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:35,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:36,073 INFO L124 PetriNetUnfolderBase]: 1201/2003 cut-off events. [2024-06-21 20:16:36,073 INFO L125 PetriNetUnfolderBase]: For 53678/53678 co-relation queries the response was YES. [2024-06-21 20:16:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12266 conditions, 2003 events. 1201/2003 cut-off events. For 53678/53678 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10744 event pairs, 288 based on Foata normal form. 2/1999 useless extension candidates. Maximal degree in co-relation 12196. Up to 1684 conditions per place. [2024-06-21 20:16:36,092 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 129 selfloop transitions, 55 changer transitions 0/192 dead transitions. [2024-06-21 20:16:36,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 192 transitions, 2523 flow [2024-06-21 20:16:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 20:16:36,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:16:36,093 INFO L175 Difference]: Start difference. First operand has 145 places, 175 transitions, 1960 flow. Second operand 5 states and 130 transitions. [2024-06-21 20:16:36,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 192 transitions, 2523 flow [2024-06-21 20:16:36,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 192 transitions, 2428 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:36,194 INFO L231 Difference]: Finished difference. Result has 146 places, 178 transitions, 2036 flow [2024-06-21 20:16:36,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2036, PETRI_PLACES=146, PETRI_TRANSITIONS=178} [2024-06-21 20:16:36,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-21 20:16:36,195 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 178 transitions, 2036 flow [2024-06-21 20:16:36,195 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 20:16:36,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:36,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:36,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:16:36,196 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:36,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash 208661279, now seen corresponding path program 3 times [2024-06-21 20:16:36,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:36,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416268066] [2024-06-21 20:16:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:36,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:36,318 INFO 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 20:16:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416268066] [2024-06-21 20:16:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416268066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:36,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:36,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:36,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997078785] [2024-06-21 20:16:36,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:36,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:36,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:36,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:36,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 178 transitions, 2036 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 20:16:36,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:36,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:36,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:36,653 INFO L124 PetriNetUnfolderBase]: 1193/2001 cut-off events. [2024-06-21 20:16:36,654 INFO L125 PetriNetUnfolderBase]: For 51395/51395 co-relation queries the response was YES. [2024-06-21 20:16:36,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12173 conditions, 2001 events. 1193/2001 cut-off events. For 51395/51395 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10740 event pairs, 266 based on Foata normal form. 2/2001 useless extension candidates. Maximal degree in co-relation 12102. Up to 1712 conditions per place. [2024-06-21 20:16:36,675 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 150 selfloop transitions, 38 changer transitions 0/196 dead transitions. [2024-06-21 20:16:36,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2458 flow [2024-06-21 20:16:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:16:36,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-21 20:16:36,677 INFO L175 Difference]: Start difference. First operand has 146 places, 178 transitions, 2036 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:16:36,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2458 flow [2024-06-21 20:16:36,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2318 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:36,803 INFO L231 Difference]: Finished difference. Result has 148 places, 178 transitions, 1996 flow [2024-06-21 20:16:36,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1996, PETRI_PLACES=148, PETRI_TRANSITIONS=178} [2024-06-21 20:16:36,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 20:16:36,805 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 178 transitions, 1996 flow [2024-06-21 20:16:36,805 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 20:16:36,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:36,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:36,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:16:36,805 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:36,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-21 20:16:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:36,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590987596] [2024-06-21 20:16:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:36,923 INFO 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 20:16:36,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:36,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590987596] [2024-06-21 20:16:36,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590987596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:36,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:36,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:36,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490033159] [2024-06-21 20:16:36,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:36,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:36,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:36,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 20:16:36,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 178 transitions, 1996 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 20:16:36,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:36,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 20:16:36,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:37,188 INFO L124 PetriNetUnfolderBase]: 1129/1935 cut-off events. [2024-06-21 20:16:37,188 INFO L125 PetriNetUnfolderBase]: For 50002/50002 co-relation queries the response was YES. [2024-06-21 20:16:37,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11647 conditions, 1935 events. 1129/1935 cut-off events. For 50002/50002 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10547 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11576. Up to 1588 conditions per place. [2024-06-21 20:16:37,205 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 144 selfloop transitions, 10 changer transitions 0/189 dead transitions. [2024-06-21 20:16:37,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 189 transitions, 2350 flow [2024-06-21 20:16:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 20:16:37,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 20:16:37,206 INFO L175 Difference]: Start difference. First operand has 148 places, 178 transitions, 1996 flow. Second operand 4 states and 103 transitions. [2024-06-21 20:16:37,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 189 transitions, 2350 flow [2024-06-21 20:16:37,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 189 transitions, 2274 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:37,286 INFO L231 Difference]: Finished difference. Result has 148 places, 180 transitions, 1973 flow [2024-06-21 20:16:37,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1973, PETRI_PLACES=148, PETRI_TRANSITIONS=180} [2024-06-21 20:16:37,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 20:16:37,287 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 180 transitions, 1973 flow [2024-06-21 20:16:37,287 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 20:16:37,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:37,287 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 20:16:37,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:16:37,287 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 20:16:37,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:37,288 INFO L85 PathProgramCache]: Analyzing trace with hash 668824790, now seen corresponding path program 1 times [2024-06-21 20:16:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:37,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616005933] [2024-06-21 20:16:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:37,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:37,414 INFO 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 20:16:37,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:37,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616005933] [2024-06-21 20:16:37,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616005933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:37,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:37,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:37,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908058370] [2024-06-21 20:16:37,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:37,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:37,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:37,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:37,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:37,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:37,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 180 transitions, 1973 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:37,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:37,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:37,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:37,832 INFO L124 PetriNetUnfolderBase]: 1315/2217 cut-off events. [2024-06-21 20:16:37,833 INFO L125 PetriNetUnfolderBase]: For 64934/64940 co-relation queries the response was YES. [2024-06-21 20:16:37,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13301 conditions, 2217 events. 1315/2217 cut-off events. For 64934/64940 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12290 event pairs, 224 based on Foata normal form. 12/2223 useless extension candidates. Maximal degree in co-relation 13229. Up to 1496 conditions per place. [2024-06-21 20:16:37,847 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 47 changer transitions 0/234 dead transitions. [2024-06-21 20:16:37,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2724 flow [2024-06-21 20:16:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:16:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:16:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 20:16:37,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:16:37,850 INFO L175 Difference]: Start difference. First operand has 148 places, 180 transitions, 1973 flow. Second operand 9 states and 234 transitions. [2024-06-21 20:16:37,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2724 flow [2024-06-21 20:16:37,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 234 transitions, 2687 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:37,942 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 2110 flow [2024-06-21 20:16:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2110, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2024-06-21 20:16:37,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-21 20:16:37,943 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 2110 flow [2024-06-21 20:16:37,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:37,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:37,943 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 20:16:37,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:16:37,943 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 20:16:37,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1550537272, now seen corresponding path program 2 times [2024-06-21 20:16:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:37,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550317110] [2024-06-21 20:16:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:38,086 INFO 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 20:16:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550317110] [2024-06-21 20:16:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550317110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:38,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138405730] [2024-06-21 20:16:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:38,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:38,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:38,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:38,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 185 transitions, 2110 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:38,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:38,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:38,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:38,475 INFO L124 PetriNetUnfolderBase]: 1373/2325 cut-off events. [2024-06-21 20:16:38,475 INFO L125 PetriNetUnfolderBase]: For 71154/71160 co-relation queries the response was YES. [2024-06-21 20:16:38,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14125 conditions, 2325 events. 1373/2325 cut-off events. For 71154/71160 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13120 event pairs, 329 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 14050. Up to 1838 conditions per place. [2024-06-21 20:16:38,493 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 44 changer transitions 0/223 dead transitions. [2024-06-21 20:16:38,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 223 transitions, 2659 flow [2024-06-21 20:16:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:16:38,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 20:16:38,494 INFO L175 Difference]: Start difference. First operand has 157 places, 185 transitions, 2110 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:16:38,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 223 transitions, 2659 flow [2024-06-21 20:16:38,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 223 transitions, 2589 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:38,600 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 2154 flow [2024-06-21 20:16:38,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2154, PETRI_PLACES=161, PETRI_TRANSITIONS=186} [2024-06-21 20:16:38,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-21 20:16:38,601 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 2154 flow [2024-06-21 20:16:38,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:38,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:38,601 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 20:16:38,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:16:38,601 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:38,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1550389402, now seen corresponding path program 3 times [2024-06-21 20:16:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:38,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236819057] [2024-06-21 20:16:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:38,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:38,755 INFO 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 20:16:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236819057] [2024-06-21 20:16:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236819057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:38,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:38,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:38,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863315532] [2024-06-21 20:16:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:38,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:38,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 186 transitions, 2154 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:38,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:38,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:38,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:39,230 INFO L124 PetriNetUnfolderBase]: 1414/2406 cut-off events. [2024-06-21 20:16:39,230 INFO L125 PetriNetUnfolderBase]: For 74566/74572 co-relation queries the response was YES. [2024-06-21 20:16:39,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14689 conditions, 2406 events. 1414/2406 cut-off events. For 74566/74572 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13766 event pairs, 327 based on Foata normal form. 12/2412 useless extension candidates. Maximal degree in co-relation 14612. Up to 1822 conditions per place. [2024-06-21 20:16:39,251 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 46 changer transitions 0/229 dead transitions. [2024-06-21 20:16:39,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 229 transitions, 2753 flow [2024-06-21 20:16:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 20:16:39,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-21 20:16:39,253 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 2154 flow. Second operand 8 states and 209 transitions. [2024-06-21 20:16:39,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 229 transitions, 2753 flow [2024-06-21 20:16:39,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 229 transitions, 2660 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:39,361 INFO L231 Difference]: Finished difference. Result has 164 places, 189 transitions, 2212 flow [2024-06-21 20:16:39,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2212, PETRI_PLACES=164, PETRI_TRANSITIONS=189} [2024-06-21 20:16:39,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 20:16:39,362 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 189 transitions, 2212 flow [2024-06-21 20:16:39,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:39,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:39,363 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 20:16:39,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:16:39,363 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:39,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -35909038, now seen corresponding path program 4 times [2024-06-21 20:16:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595304845] [2024-06-21 20:16:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:39,478 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 20:16:39,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:39,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595304845] [2024-06-21 20:16:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595304845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:39,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565422253] [2024-06-21 20:16:39,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:39,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:39,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:39,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:39,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 189 transitions, 2212 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 20:16:39,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:39,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:39,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:39,821 INFO L124 PetriNetUnfolderBase]: 1472/2482 cut-off events. [2024-06-21 20:16:39,822 INFO L125 PetriNetUnfolderBase]: For 81643/81643 co-relation queries the response was YES. [2024-06-21 20:16:39,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15206 conditions, 2482 events. 1472/2482 cut-off events. For 81643/81643 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14320 event pairs, 370 based on Foata normal form. 16/2484 useless extension candidates. Maximal degree in co-relation 15127. Up to 2007 conditions per place. [2024-06-21 20:16:39,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 44 changer transitions 0/217 dead transitions. [2024-06-21 20:16:39,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 2722 flow [2024-06-21 20:16:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:16:39,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:16:39,842 INFO L175 Difference]: Start difference. First operand has 164 places, 189 transitions, 2212 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:16:39,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 2722 flow [2024-06-21 20:16:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 217 transitions, 2654 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:40,022 INFO L231 Difference]: Finished difference. Result has 167 places, 190 transitions, 2257 flow [2024-06-21 20:16:40,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2257, PETRI_PLACES=167, PETRI_TRANSITIONS=190} [2024-06-21 20:16:40,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-21 20:16:40,022 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 190 transitions, 2257 flow [2024-06-21 20:16:40,022 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 20:16:40,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:40,023 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 20:16:40,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:16:40,023 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 20:16:40,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash -724088216, now seen corresponding path program 5 times [2024-06-21 20:16:40,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:40,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856578140] [2024-06-21 20:16:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:40,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:40,152 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 20:16:40,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:40,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856578140] [2024-06-21 20:16:40,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856578140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:40,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:40,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443363517] [2024-06-21 20:16:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:40,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:40,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:40,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 190 transitions, 2257 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 20:16:40,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:40,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:40,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:40,541 INFO L124 PetriNetUnfolderBase]: 1530/2590 cut-off events. [2024-06-21 20:16:40,542 INFO L125 PetriNetUnfolderBase]: For 85886/85886 co-relation queries the response was YES. [2024-06-21 20:16:40,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15850 conditions, 2590 events. 1530/2590 cut-off events. For 85886/85886 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15116 event pairs, 385 based on Foata normal form. 16/2592 useless extension candidates. Maximal degree in co-relation 15769. Up to 2105 conditions per place. [2024-06-21 20:16:40,562 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 43 changer transitions 0/218 dead transitions. [2024-06-21 20:16:40,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 218 transitions, 2771 flow [2024-06-21 20:16:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:16:40,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:16:40,564 INFO L175 Difference]: Start difference. First operand has 167 places, 190 transitions, 2257 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:16:40,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 218 transitions, 2771 flow [2024-06-21 20:16:40,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2676 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:40,704 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2275 flow [2024-06-21 20:16:40,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2162, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-21 20:16:40,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 20:16:40,704 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2275 flow [2024-06-21 20:16:40,704 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 20:16:40,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:40,704 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 20:16:40,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:16:40,705 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 20:16:40,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1417226854, now seen corresponding path program 6 times [2024-06-21 20:16:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:40,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732458912] [2024-06-21 20:16:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:40,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:40,819 INFO 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 20:16:40,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:40,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732458912] [2024-06-21 20:16:40,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732458912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:40,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:40,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325649193] [2024-06-21 20:16:40,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:40,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:40,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:40,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:40,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2275 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 20:16:40,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:40,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:40,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:41,246 INFO L124 PetriNetUnfolderBase]: 1546/2622 cut-off events. [2024-06-21 20:16:41,247 INFO L125 PetriNetUnfolderBase]: For 86505/86505 co-relation queries the response was YES. [2024-06-21 20:16:41,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15921 conditions, 2622 events. 1546/2622 cut-off events. For 86505/86505 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15379 event pairs, 376 based on Foata normal form. 12/2620 useless extension candidates. Maximal degree in co-relation 15839. Up to 1958 conditions per place. [2024-06-21 20:16:41,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 46 changer transitions 0/224 dead transitions. [2024-06-21 20:16:41,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 224 transitions, 2839 flow [2024-06-21 20:16:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:16:41,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 20:16:41,269 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2275 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:16:41,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 224 transitions, 2839 flow [2024-06-21 20:16:41,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 224 transitions, 2744 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:41,405 INFO L231 Difference]: Finished difference. Result has 172 places, 194 transitions, 2335 flow [2024-06-21 20:16:41,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2335, PETRI_PLACES=172, PETRI_TRANSITIONS=194} [2024-06-21 20:16:41,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 20:16:41,406 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 194 transitions, 2335 flow [2024-06-21 20:16:41,406 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 20:16:41,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:41,406 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 20:16:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:16:41,406 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:41,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash -517161914, now seen corresponding path program 1 times [2024-06-21 20:16:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:41,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235097498] [2024-06-21 20:16:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:41,517 INFO 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 20:16:41,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235097498] [2024-06-21 20:16:41,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235097498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:41,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699374419] [2024-06-21 20:16:41,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:41,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:41,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:41,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 194 transitions, 2335 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 20:16:41,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:41,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:41,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:41,913 INFO L124 PetriNetUnfolderBase]: 1587/2703 cut-off events. [2024-06-21 20:16:41,914 INFO L125 PetriNetUnfolderBase]: For 91475/91475 co-relation queries the response was YES. [2024-06-21 20:16:41,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16372 conditions, 2703 events. 1587/2703 cut-off events. For 91475/91475 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16075 event pairs, 352 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 16288. Up to 1919 conditions per place. [2024-06-21 20:16:41,935 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 49 changer transitions 0/225 dead transitions. [2024-06-21 20:16:41,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 225 transitions, 2877 flow [2024-06-21 20:16:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:16:41,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 20:16:41,936 INFO L175 Difference]: Start difference. First operand has 172 places, 194 transitions, 2335 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:16:41,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 225 transitions, 2877 flow [2024-06-21 20:16:42,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 225 transitions, 2805 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:42,075 INFO L231 Difference]: Finished difference. Result has 176 places, 195 transitions, 2391 flow [2024-06-21 20:16:42,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2391, PETRI_PLACES=176, PETRI_TRANSITIONS=195} [2024-06-21 20:16:42,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-21 20:16:42,075 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 195 transitions, 2391 flow [2024-06-21 20:16:42,075 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 20:16:42,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:42,076 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 20:16:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:16:42,076 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:42,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1159342476, now seen corresponding path program 7 times [2024-06-21 20:16:42,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:42,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674116546] [2024-06-21 20:16:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:42,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:42,210 INFO 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 20:16:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:42,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674116546] [2024-06-21 20:16:42,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674116546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:42,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:42,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:42,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137320980] [2024-06-21 20:16:42,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:42,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:42,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:42,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:42,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 195 transitions, 2391 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 20:16:42,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:42,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:42,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:42,675 INFO L124 PetriNetUnfolderBase]: 1628/2797 cut-off events. [2024-06-21 20:16:42,675 INFO L125 PetriNetUnfolderBase]: For 95950/95956 co-relation queries the response was YES. [2024-06-21 20:16:42,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16980 conditions, 2797 events. 1628/2797 cut-off events. For 95950/95956 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16752 event pairs, 317 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16894. Up to 2106 conditions per place. [2024-06-21 20:16:42,698 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 46 changer transitions 0/235 dead transitions. [2024-06-21 20:16:42,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 3113 flow [2024-06-21 20:16:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:16:42,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 20:16:42,699 INFO L175 Difference]: Start difference. First operand has 176 places, 195 transitions, 2391 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:16:42,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 3113 flow [2024-06-21 20:16:42,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 235 transitions, 2999 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:42,866 INFO L231 Difference]: Finished difference. Result has 179 places, 197 transitions, 2413 flow [2024-06-21 20:16:42,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2413, PETRI_PLACES=179, PETRI_TRANSITIONS=197} [2024-06-21 20:16:42,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-21 20:16:42,867 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 197 transitions, 2413 flow [2024-06-21 20:16:42,867 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 20:16:42,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:42,867 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 20:16:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:16:42,867 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:42,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1157110592, now seen corresponding path program 8 times [2024-06-21 20:16:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:42,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394751075] [2024-06-21 20:16:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:42,995 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 20:16:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:42,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394751075] [2024-06-21 20:16:42,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394751075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:42,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:42,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:42,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619963142] [2024-06-21 20:16:42,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:42,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:43,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:43,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 197 transitions, 2413 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 20:16:43,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:43,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:43,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:43,468 INFO L124 PetriNetUnfolderBase]: 1686/2895 cut-off events. [2024-06-21 20:16:43,469 INFO L125 PetriNetUnfolderBase]: For 103511/103517 co-relation queries the response was YES. [2024-06-21 20:16:43,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17502 conditions, 2895 events. 1686/2895 cut-off events. For 103511/103517 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17508 event pairs, 422 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17414. Up to 2377 conditions per place. [2024-06-21 20:16:43,489 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 44 changer transitions 0/231 dead transitions. [2024-06-21 20:16:43,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 231 transitions, 2975 flow [2024-06-21 20:16:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:16:43,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-21 20:16:43,490 INFO L175 Difference]: Start difference. First operand has 179 places, 197 transitions, 2413 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:16:43,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 231 transitions, 2975 flow [2024-06-21 20:16:43,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 231 transitions, 2827 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:43,668 INFO L231 Difference]: Finished difference. Result has 180 places, 198 transitions, 2386 flow [2024-06-21 20:16:43,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=180, PETRI_TRANSITIONS=198} [2024-06-21 20:16:43,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-21 20:16:43,669 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 198 transitions, 2386 flow [2024-06-21 20:16:43,669 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 20:16:43,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:43,669 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 20:16:43,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:16:43,670 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:43,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1254556526, now seen corresponding path program 9 times [2024-06-21 20:16:43,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:43,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204603983] [2024-06-21 20:16:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:43,788 INFO 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 20:16:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:43,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204603983] [2024-06-21 20:16:43,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204603983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:43,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:43,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:43,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088815387] [2024-06-21 20:16:43,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:43,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:43,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:43,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:43,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:43,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:43,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 198 transitions, 2386 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 20:16:43,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:43,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:43,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:44,265 INFO L124 PetriNetUnfolderBase]: 1744/2983 cut-off events. [2024-06-21 20:16:44,265 INFO L125 PetriNetUnfolderBase]: For 109283/109289 co-relation queries the response was YES. [2024-06-21 20:16:44,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17750 conditions, 2983 events. 1744/2983 cut-off events. For 109283/109289 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18221 event pairs, 434 based on Foata normal form. 20/2992 useless extension candidates. Maximal degree in co-relation 17662. Up to 2475 conditions per place. [2024-06-21 20:16:44,290 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 42 changer transitions 0/226 dead transitions. [2024-06-21 20:16:44,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 226 transitions, 2920 flow [2024-06-21 20:16:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:16:44,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:16:44,291 INFO L175 Difference]: Start difference. First operand has 180 places, 198 transitions, 2386 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:16:44,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 226 transitions, 2920 flow [2024-06-21 20:16:44,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 226 transitions, 2825 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:44,494 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 2406 flow [2024-06-21 20:16:44,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2406, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2024-06-21 20:16:44,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 20:16:44,495 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 2406 flow [2024-06-21 20:16:44,495 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 20:16:44,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:44,496 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 20:16:44,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:16:44,496 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:44,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1356556532, now seen corresponding path program 10 times [2024-06-21 20:16:44,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:44,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374878391] [2024-06-21 20:16:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:44,612 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 20:16:44,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:44,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374878391] [2024-06-21 20:16:44,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374878391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:44,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:44,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:44,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870171148] [2024-06-21 20:16:44,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:44,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:44,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:44,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:44,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 2406 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 20:16:44,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:44,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:44,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:45,092 INFO L124 PetriNetUnfolderBase]: 1716/2949 cut-off events. [2024-06-21 20:16:45,092 INFO L125 PetriNetUnfolderBase]: For 101906/101912 co-relation queries the response was YES. [2024-06-21 20:16:45,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2949 events. 1716/2949 cut-off events. For 101906/101912 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17918 event pairs, 416 based on Foata normal form. 16/2958 useless extension candidates. Maximal degree in co-relation 16960. Up to 2431 conditions per place. [2024-06-21 20:16:45,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 43 changer transitions 0/230 dead transitions. [2024-06-21 20:16:45,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 2958 flow [2024-06-21 20:16:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:16:45,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 20:16:45,121 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 2406 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:16:45,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 2958 flow [2024-06-21 20:16:45,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 230 transitions, 2845 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:45,305 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2412 flow [2024-06-21 20:16:45,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2412, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-06-21 20:16:45,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-21 20:16:45,305 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2412 flow [2024-06-21 20:16:45,306 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 20:16:45,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:45,306 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 20:16:45,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:16:45,306 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:45,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1364181044, now seen corresponding path program 2 times [2024-06-21 20:16:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:45,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932808856] [2024-06-21 20:16:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:45,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932808856] [2024-06-21 20:16:45,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932808856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:45,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:45,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714050561] [2024-06-21 20:16:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:45,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:45,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:45,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:45,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2412 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 20:16:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:45,956 INFO L124 PetriNetUnfolderBase]: 1757/3030 cut-off events. [2024-06-21 20:16:45,957 INFO L125 PetriNetUnfolderBase]: For 102838/102844 co-relation queries the response was YES. [2024-06-21 20:16:45,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17285 conditions, 3030 events. 1757/3030 cut-off events. For 102838/102844 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18624 event pairs, 416 based on Foata normal form. 12/3035 useless extension candidates. Maximal degree in co-relation 17195. Up to 2323 conditions per place. [2024-06-21 20:16:45,981 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 46 changer transitions 0/234 dead transitions. [2024-06-21 20:16:45,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 234 transitions, 2982 flow [2024-06-21 20:16:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:16:45,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 20:16:45,987 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 2412 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:16:45,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 234 transitions, 2982 flow [2024-06-21 20:16:46,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 234 transitions, 2895 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:46,186 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 2449 flow [2024-06-21 20:16:46,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2449, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-21 20:16:46,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 20:16:46,186 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 2449 flow [2024-06-21 20:16:46,187 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 20:16:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:46,187 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 20:16:46,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:16:46,187 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:46,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1246932014, now seen corresponding path program 3 times [2024-06-21 20:16:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:46,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800427170] [2024-06-21 20:16:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:46,294 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 20:16:46,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800427170] [2024-06-21 20:16:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800427170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:46,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:46,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:46,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30407792] [2024-06-21 20:16:46,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:46,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:46,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:46,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 2449 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 20:16:46,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:46,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:46,727 INFO L124 PetriNetUnfolderBase]: 1798/3096 cut-off events. [2024-06-21 20:16:46,727 INFO L125 PetriNetUnfolderBase]: For 109641/109647 co-relation queries the response was YES. [2024-06-21 20:16:46,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17742 conditions, 3096 events. 1798/3096 cut-off events. For 109641/109647 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19247 event pairs, 433 based on Foata normal form. 16/3101 useless extension candidates. Maximal degree in co-relation 17651. Up to 2486 conditions per place. [2024-06-21 20:16:46,753 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-21 20:16:46,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 3009 flow [2024-06-21 20:16:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:16:46,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:16:46,754 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 2449 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:16:46,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 3009 flow [2024-06-21 20:16:46,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 2899 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:46,936 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2461 flow [2024-06-21 20:16:46,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2461, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-21 20:16:46,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 20:16:46,936 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2461 flow [2024-06-21 20:16:46,937 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 20:16:46,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:46,937 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 20:16:46,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:16:46,937 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:46,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash -685071406, now seen corresponding path program 4 times [2024-06-21 20:16:46,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:46,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406837066] [2024-06-21 20:16:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:47,041 INFO 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 20:16:47,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406837066] [2024-06-21 20:16:47,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406837066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:47,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:47,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:47,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405329398] [2024-06-21 20:16:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:47,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:47,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:47,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:47,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2461 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 20:16:47,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:47,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:47,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:47,484 INFO L124 PetriNetUnfolderBase]: 1778/3074 cut-off events. [2024-06-21 20:16:47,484 INFO L125 PetriNetUnfolderBase]: For 103777/103783 co-relation queries the response was YES. [2024-06-21 20:16:47,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17128 conditions, 3074 events. 1778/3074 cut-off events. For 103777/103783 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19080 event pairs, 378 based on Foata normal form. 16/3079 useless extension candidates. Maximal degree in co-relation 17036. Up to 1710 conditions per place. [2024-06-21 20:16:47,509 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 55 changer transitions 0/232 dead transitions. [2024-06-21 20:16:47,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 232 transitions, 2923 flow [2024-06-21 20:16:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:16:47,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:16:47,510 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2461 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:16:47,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 232 transitions, 2923 flow [2024-06-21 20:16:47,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 2797 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:47,705 INFO L231 Difference]: Finished difference. Result has 188 places, 201 transitions, 2375 flow [2024-06-21 20:16:47,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2375, PETRI_PLACES=188, PETRI_TRANSITIONS=201} [2024-06-21 20:16:47,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 20:16:47,706 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 201 transitions, 2375 flow [2024-06-21 20:16:47,706 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 20:16:47,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:47,707 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 20:16:47,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:16:47,707 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 20:16:47,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:47,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2016186254, now seen corresponding path program 1 times [2024-06-21 20:16:47,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:47,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529303650] [2024-06-21 20:16:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:47,817 INFO 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 20:16:47,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:47,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529303650] [2024-06-21 20:16:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529303650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:47,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:47,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687511834] [2024-06-21 20:16:47,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:47,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:47,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 201 transitions, 2375 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 20:16:47,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:47,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:47,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:48,204 INFO L124 PetriNetUnfolderBase]: 1796/3078 cut-off events. [2024-06-21 20:16:48,204 INFO L125 PetriNetUnfolderBase]: For 95710/95710 co-relation queries the response was YES. [2024-06-21 20:16:48,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17270 conditions, 3078 events. 1796/3078 cut-off events. For 95710/95710 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19042 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17178. Up to 2581 conditions per place. [2024-06-21 20:16:48,230 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 145 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-06-21 20:16:48,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 232 transitions, 3253 flow [2024-06-21 20:16:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:16:48,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:16:48,232 INFO L175 Difference]: Start difference. First operand has 188 places, 201 transitions, 2375 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:16:48,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 232 transitions, 3253 flow [2024-06-21 20:16:48,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 3054 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:48,402 INFO L231 Difference]: Finished difference. Result has 188 places, 212 transitions, 2473 flow [2024-06-21 20:16:48,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2473, PETRI_PLACES=188, PETRI_TRANSITIONS=212} [2024-06-21 20:16:48,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 20:16:48,403 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 212 transitions, 2473 flow [2024-06-21 20:16:48,403 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 20:16:48,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:48,403 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 20:16:48,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:16:48,403 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 20:16:48,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:48,403 INFO L85 PathProgramCache]: Analyzing trace with hash -565126384, now seen corresponding path program 2 times [2024-06-21 20:16:48,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:48,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043614914] [2024-06-21 20:16:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:48,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:48,532 INFO 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 20:16:48,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043614914] [2024-06-21 20:16:48,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043614914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:48,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:48,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466539335] [2024-06-21 20:16:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:48,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:48,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:48,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:48,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 212 transitions, 2473 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 20:16:48,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:48,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:48,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:49,013 INFO L124 PetriNetUnfolderBase]: 1822/3125 cut-off events. [2024-06-21 20:16:49,014 INFO L125 PetriNetUnfolderBase]: For 101069/101069 co-relation queries the response was YES. [2024-06-21 20:16:49,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17401 conditions, 3125 events. 1822/3125 cut-off events. For 101069/101069 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19353 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17310. Up to 2724 conditions per place. [2024-06-21 20:16:49,039 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 66 changer transitions 0/237 dead transitions. [2024-06-21 20:16:49,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 237 transitions, 3343 flow [2024-06-21 20:16:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:16:49,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 20:16:49,040 INFO L175 Difference]: Start difference. First operand has 188 places, 212 transitions, 2473 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:16:49,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 237 transitions, 3343 flow [2024-06-21 20:16:49,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 237 transitions, 3206 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:49,234 INFO L231 Difference]: Finished difference. Result has 192 places, 220 transitions, 2591 flow [2024-06-21 20:16:49,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2591, PETRI_PLACES=192, PETRI_TRANSITIONS=220} [2024-06-21 20:16:49,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-21 20:16:49,235 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 220 transitions, 2591 flow [2024-06-21 20:16:49,235 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 20:16:49,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:49,235 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 20:16:49,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:16:49,235 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 20:16:49,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash -565120804, now seen corresponding path program 3 times [2024-06-21 20:16:49,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:49,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406208363] [2024-06-21 20:16:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:49,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:49,346 INFO 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 20:16:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:49,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406208363] [2024-06-21 20:16:49,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406208363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:49,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:49,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235708420] [2024-06-21 20:16:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:49,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:49,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 220 transitions, 2591 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 20:16:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:49,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:49,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:49,856 INFO L124 PetriNetUnfolderBase]: 1816/3117 cut-off events. [2024-06-21 20:16:49,856 INFO L125 PetriNetUnfolderBase]: For 103431/103431 co-relation queries the response was YES. [2024-06-21 20:16:49,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17360 conditions, 3117 events. 1816/3117 cut-off events. For 103431/103431 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19303 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17267. Up to 2718 conditions per place. [2024-06-21 20:16:49,883 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 67 changer transitions 0/238 dead transitions. [2024-06-21 20:16:49,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 238 transitions, 3273 flow [2024-06-21 20:16:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:16:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:16:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 20:16:49,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-21 20:16:49,884 INFO L175 Difference]: Start difference. First operand has 192 places, 220 transitions, 2591 flow. Second operand 9 states and 209 transitions. [2024-06-21 20:16:49,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 238 transitions, 3273 flow [2024-06-21 20:16:50,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 238 transitions, 3149 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:50,073 INFO L231 Difference]: Finished difference. Result has 198 places, 220 transitions, 2608 flow [2024-06-21 20:16:50,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2608, PETRI_PLACES=198, PETRI_TRANSITIONS=220} [2024-06-21 20:16:50,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-21 20:16:50,074 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 220 transitions, 2608 flow [2024-06-21 20:16:50,074 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 20:16:50,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:50,074 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 20:16:50,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:16:50,074 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 20:16:50,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2128785538, now seen corresponding path program 4 times [2024-06-21 20:16:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:50,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078639785] [2024-06-21 20:16:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:50,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:50,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078639785] [2024-06-21 20:16:50,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078639785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:50,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:50,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:50,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334104858] [2024-06-21 20:16:50,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:50,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:50,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:50,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:50,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:50,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 220 transitions, 2608 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 20:16:50,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:50,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:50,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:50,651 INFO L124 PetriNetUnfolderBase]: 1850/3174 cut-off events. [2024-06-21 20:16:50,651 INFO L125 PetriNetUnfolderBase]: For 110861/110861 co-relation queries the response was YES. [2024-06-21 20:16:50,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18015 conditions, 3174 events. 1850/3174 cut-off events. For 110861/110861 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19770 event pairs, 419 based on Foata normal form. 2/3170 useless extension candidates. Maximal degree in co-relation 17920. Up to 2662 conditions per place. [2024-06-21 20:16:50,681 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-21 20:16:50,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 258 transitions, 3778 flow [2024-06-21 20:16:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:16:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:16:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 20:16:50,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-21 20:16:50,682 INFO L175 Difference]: Start difference. First operand has 198 places, 220 transitions, 2608 flow. Second operand 9 states and 221 transitions. [2024-06-21 20:16:50,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 258 transitions, 3778 flow [2024-06-21 20:16:50,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 258 transitions, 3633 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:50,901 INFO L231 Difference]: Finished difference. Result has 200 places, 231 transitions, 2849 flow [2024-06-21 20:16:50,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2849, PETRI_PLACES=200, PETRI_TRANSITIONS=231} [2024-06-21 20:16:50,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-21 20:16:50,901 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 231 transitions, 2849 flow [2024-06-21 20:16:50,902 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 20:16:50,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:50,902 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 20:16:50,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:16:50,902 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 20:16:50,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2128791118, now seen corresponding path program 5 times [2024-06-21 20:16:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497808828] [2024-06-21 20:16:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:51,033 INFO 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 20:16:51,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497808828] [2024-06-21 20:16:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497808828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:51,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:51,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239759128] [2024-06-21 20:16:51,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:51,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:51,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:51,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:51,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:51,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 231 transitions, 2849 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 20:16:51,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:51,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:51,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:51,485 INFO L124 PetriNetUnfolderBase]: 1844/3166 cut-off events. [2024-06-21 20:16:51,485 INFO L125 PetriNetUnfolderBase]: For 113490/113490 co-relation queries the response was YES. [2024-06-21 20:16:51,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18143 conditions, 3166 events. 1844/3166 cut-off events. For 113490/113490 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19694 event pairs, 419 based on Foata normal form. 2/3162 useless extension candidates. Maximal degree in co-relation 18046. Up to 2657 conditions per place. [2024-06-21 20:16:51,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 96 changer transitions 0/255 dead transitions. [2024-06-21 20:16:51,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 255 transitions, 3777 flow [2024-06-21 20:16:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:16:51,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 20:16:51,516 INFO L175 Difference]: Start difference. First operand has 200 places, 231 transitions, 2849 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:16:51,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 255 transitions, 3777 flow [2024-06-21 20:16:51,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 255 transitions, 3530 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:51,791 INFO L231 Difference]: Finished difference. Result has 201 places, 231 transitions, 2814 flow [2024-06-21 20:16:51,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2814, PETRI_PLACES=201, PETRI_TRANSITIONS=231} [2024-06-21 20:16:51,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 20:16:51,792 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 231 transitions, 2814 flow [2024-06-21 20:16:51,792 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 20:16:51,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:51,792 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 20:16:51,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:16:51,793 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 20:16:51,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2121433888, now seen corresponding path program 6 times [2024-06-21 20:16:51,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:51,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190312618] [2024-06-21 20:16:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:51,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:51,921 INFO 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 20:16:51,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190312618] [2024-06-21 20:16:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190312618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:51,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:51,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:51,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223756556] [2024-06-21 20:16:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:51,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:51,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:51,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:51,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 231 transitions, 2814 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 20:16:51,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:51,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:51,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:52,423 INFO L124 PetriNetUnfolderBase]: 1877/3232 cut-off events. [2024-06-21 20:16:52,423 INFO L125 PetriNetUnfolderBase]: For 113549/113549 co-relation queries the response was YES. [2024-06-21 20:16:52,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18568 conditions, 3232 events. 1877/3232 cut-off events. For 113549/113549 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20213 event pairs, 398 based on Foata normal form. 2/3232 useless extension candidates. Maximal degree in co-relation 18471. Up to 2813 conditions per place. [2024-06-21 20:16:52,455 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 53 changer transitions 0/272 dead transitions. [2024-06-21 20:16:52,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 272 transitions, 3792 flow [2024-06-21 20:16:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:16:52,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-21 20:16:52,456 INFO L175 Difference]: Start difference. First operand has 201 places, 231 transitions, 2814 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:16:52,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 272 transitions, 3792 flow [2024-06-21 20:16:52,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 272 transitions, 3561 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:52,761 INFO L231 Difference]: Finished difference. Result has 202 places, 248 transitions, 3067 flow [2024-06-21 20:16:52,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3067, PETRI_PLACES=202, PETRI_TRANSITIONS=248} [2024-06-21 20:16:52,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 20:16:52,762 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 248 transitions, 3067 flow [2024-06-21 20:16:52,762 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 20:16:52,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:52,763 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 20:16:52,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:16:52,763 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 20:16:52,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1578934314, now seen corresponding path program 1 times [2024-06-21 20:16:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:52,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809036677] [2024-06-21 20:16:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:52,872 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 20:16:52,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809036677] [2024-06-21 20:16:52,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809036677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:52,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:52,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:52,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075562020] [2024-06-21 20:16:52,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:52,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:52,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:52,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:52,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 248 transitions, 3067 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 20:16:52,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:52,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:52,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:53,324 INFO L124 PetriNetUnfolderBase]: 1905/3285 cut-off events. [2024-06-21 20:16:53,324 INFO L125 PetriNetUnfolderBase]: For 116541/116547 co-relation queries the response was YES. [2024-06-21 20:16:53,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18881 conditions, 3285 events. 1905/3285 cut-off events. For 116541/116547 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20705 event pairs, 425 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 18782. Up to 2729 conditions per place. [2024-06-21 20:16:53,356 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 78 changer transitions 0/289 dead transitions. [2024-06-21 20:16:53,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 289 transitions, 4118 flow [2024-06-21 20:16:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:16:53,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:16:53,357 INFO L175 Difference]: Start difference. First operand has 202 places, 248 transitions, 3067 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:16:53,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 289 transitions, 4118 flow [2024-06-21 20:16:53,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 289 transitions, 4012 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:53,654 INFO L231 Difference]: Finished difference. Result has 207 places, 263 transitions, 3282 flow [2024-06-21 20:16:53,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3282, PETRI_PLACES=207, PETRI_TRANSITIONS=263} [2024-06-21 20:16:53,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 20:16:53,655 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 263 transitions, 3282 flow [2024-06-21 20:16:53,655 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 20:16:53,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:53,655 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 20:16:53,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:16:53,656 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 20:16:53,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1254193194, now seen corresponding path program 2 times [2024-06-21 20:16:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280537352] [2024-06-21 20:16:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:53,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:53,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280537352] [2024-06-21 20:16:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280537352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:53,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:53,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:53,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968656409] [2024-06-21 20:16:53,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:53,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:53,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:53,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:53,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 263 transitions, 3282 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 20:16:53,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:53,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:53,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:54,273 INFO L124 PetriNetUnfolderBase]: 1941/3347 cut-off events. [2024-06-21 20:16:54,273 INFO L125 PetriNetUnfolderBase]: For 125021/125027 co-relation queries the response was YES. [2024-06-21 20:16:54,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19742 conditions, 3347 events. 1941/3347 cut-off events. For 125021/125027 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21183 event pairs, 425 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19641. Up to 2760 conditions per place. [2024-06-21 20:16:54,303 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 84 changer transitions 0/295 dead transitions. [2024-06-21 20:16:54,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 295 transitions, 4331 flow [2024-06-21 20:16:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:16:54,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:16:54,304 INFO L175 Difference]: Start difference. First operand has 207 places, 263 transitions, 3282 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:16:54,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 295 transitions, 4331 flow [2024-06-21 20:16:54,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 295 transitions, 4227 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:54,702 INFO L231 Difference]: Finished difference. Result has 214 places, 275 transitions, 3504 flow [2024-06-21 20:16:54,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3504, PETRI_PLACES=214, PETRI_TRANSITIONS=275} [2024-06-21 20:16:54,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 20:16:54,702 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 275 transitions, 3504 flow [2024-06-21 20:16:54,702 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 20:16:54,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:54,703 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 20:16:54,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:16:54,703 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 20:16:54,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1571210526, now seen corresponding path program 3 times [2024-06-21 20:16:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:54,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847473101] [2024-06-21 20:16:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:54,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847473101] [2024-06-21 20:16:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847473101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:54,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:54,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:54,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81916573] [2024-06-21 20:16:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:54,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:54,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:54,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:54,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 275 transitions, 3504 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 20:16:54,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:54,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:54,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:55,285 INFO L124 PetriNetUnfolderBase]: 1935/3339 cut-off events. [2024-06-21 20:16:55,285 INFO L125 PetriNetUnfolderBase]: For 127632/127638 co-relation queries the response was YES. [2024-06-21 20:16:55,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19895 conditions, 3339 events. 1935/3339 cut-off events. For 127632/127638 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21159 event pairs, 425 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19790. Up to 2755 conditions per place. [2024-06-21 20:16:55,317 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 201 selfloop transitions, 85 changer transitions 0/294 dead transitions. [2024-06-21 20:16:55,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 294 transitions, 4318 flow [2024-06-21 20:16:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:16:55,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:16:55,318 INFO L175 Difference]: Start difference. First operand has 214 places, 275 transitions, 3504 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:16:55,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 294 transitions, 4318 flow [2024-06-21 20:16:55,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 294 transitions, 4150 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:55,651 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3513 flow [2024-06-21 20:16:55,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3513, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-21 20:16:55,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 20:16:55,651 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3513 flow [2024-06-21 20:16:55,652 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 20:16:55,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:55,652 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 20:16:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:16:55,652 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 20:16:55,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -847716112, now seen corresponding path program 1 times [2024-06-21 20:16:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:55,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497310056] [2024-06-21 20:16:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:55,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:55,764 INFO 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 20:16:55,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:55,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497310056] [2024-06-21 20:16:55,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497310056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:55,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:55,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:55,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831873661] [2024-06-21 20:16:55,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:55,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:55,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:55,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:55,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3513 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 20:16:55,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:55,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:55,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:56,374 INFO L124 PetriNetUnfolderBase]: 1940/3344 cut-off events. [2024-06-21 20:16:56,374 INFO L125 PetriNetUnfolderBase]: For 130899/130905 co-relation queries the response was YES. [2024-06-21 20:16:56,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20047 conditions, 3344 events. 1940/3344 cut-off events. For 130899/130905 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21160 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 19941. Up to 2902 conditions per place. [2024-06-21 20:16:56,414 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 228 selfloop transitions, 61 changer transitions 0/297 dead transitions. [2024-06-21 20:16:56,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 297 transitions, 4396 flow [2024-06-21 20:16:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:16:56,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 20:16:56,415 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3513 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:16:56,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 297 transitions, 4396 flow [2024-06-21 20:16:56,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 297 transitions, 4232 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:56,810 INFO L231 Difference]: Finished difference. Result has 221 places, 278 transitions, 3536 flow [2024-06-21 20:16:56,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3353, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3536, PETRI_PLACES=221, PETRI_TRANSITIONS=278} [2024-06-21 20:16:56,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-21 20:16:56,810 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 278 transitions, 3536 flow [2024-06-21 20:16:56,811 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 20:16:56,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:56,811 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 20:16:56,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:16:56,811 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 20:16:56,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash -234570720, now seen corresponding path program 1 times [2024-06-21 20:16:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:56,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993964462] [2024-06-21 20:16:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:56,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993964462] [2024-06-21 20:16:56,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993964462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:56,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:56,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603428776] [2024-06-21 20:16:56,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:56,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:56,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:56,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:56,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 278 transitions, 3536 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 20:16:56,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:56,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:56,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:57,430 INFO L124 PetriNetUnfolderBase]: 1956/3368 cut-off events. [2024-06-21 20:16:57,430 INFO L125 PetriNetUnfolderBase]: For 139527/139533 co-relation queries the response was YES. [2024-06-21 20:16:57,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20228 conditions, 3368 events. 1956/3368 cut-off events. For 139527/139533 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21288 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 20121. Up to 2914 conditions per place. [2024-06-21 20:16:57,466 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 229 selfloop transitions, 64 changer transitions 0/301 dead transitions. [2024-06-21 20:16:57,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 301 transitions, 4426 flow [2024-06-21 20:16:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:16:57,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 20:16:57,468 INFO L175 Difference]: Start difference. First operand has 221 places, 278 transitions, 3536 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:16:57,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 301 transitions, 4426 flow [2024-06-21 20:16:57,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 301 transitions, 4319 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:57,781 INFO L231 Difference]: Finished difference. Result has 225 places, 281 transitions, 3621 flow [2024-06-21 20:16:57,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3621, PETRI_PLACES=225, PETRI_TRANSITIONS=281} [2024-06-21 20:16:57,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 20:16:57,781 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 281 transitions, 3621 flow [2024-06-21 20:16:57,782 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 20:16:57,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:57,782 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 20:16:57,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:16:57,782 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 20:16:57,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1774716800, now seen corresponding path program 4 times [2024-06-21 20:16:57,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:57,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033688564] [2024-06-21 20:16:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:57,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:57,887 INFO 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 20:16:57,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:57,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033688564] [2024-06-21 20:16:57,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033688564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190662321] [2024-06-21 20:16:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:57,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:57,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:57,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:57,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 281 transitions, 3621 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 20:16:57,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:57,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:57,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:58,367 INFO L124 PetriNetUnfolderBase]: 1982/3413 cut-off events. [2024-06-21 20:16:58,367 INFO L125 PetriNetUnfolderBase]: For 146007/146013 co-relation queries the response was YES. [2024-06-21 20:16:58,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20739 conditions, 3413 events. 1982/3413 cut-off events. For 146007/146013 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21648 event pairs, 428 based on Foata normal form. 6/3414 useless extension candidates. Maximal degree in co-relation 20630. Up to 2808 conditions per place. [2024-06-21 20:16:58,405 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 97 changer transitions 0/308 dead transitions. [2024-06-21 20:16:58,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 308 transitions, 4667 flow [2024-06-21 20:16:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:16:58,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:16:58,406 INFO L175 Difference]: Start difference. First operand has 225 places, 281 transitions, 3621 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:16:58,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 308 transitions, 4667 flow [2024-06-21 20:16:58,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 308 transitions, 4497 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:58,851 INFO L231 Difference]: Finished difference. Result has 226 places, 289 transitions, 3745 flow [2024-06-21 20:16:58,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3451, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3745, PETRI_PLACES=226, PETRI_TRANSITIONS=289} [2024-06-21 20:16:58,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 20:16:58,852 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 289 transitions, 3745 flow [2024-06-21 20:16:58,852 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 20:16:58,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:58,853 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 20:16:58,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:16:58,853 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 20:16:58,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1779265272, now seen corresponding path program 5 times [2024-06-21 20:16:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:58,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192630298] [2024-06-21 20:16:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:58,958 INFO 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 20:16:58,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:58,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192630298] [2024-06-21 20:16:58,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192630298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:58,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:58,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133620577] [2024-06-21 20:16:58,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:58,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:58,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:59,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:16:59,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 289 transitions, 3745 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 20:16:59,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:59,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:16:59,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:59,566 INFO L124 PetriNetUnfolderBase]: 1976/3405 cut-off events. [2024-06-21 20:16:59,566 INFO L125 PetriNetUnfolderBase]: For 147961/147967 co-relation queries the response was YES. [2024-06-21 20:16:59,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20697 conditions, 3405 events. 1976/3405 cut-off events. For 147961/147967 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21603 event pairs, 427 based on Foata normal form. 6/3406 useless extension candidates. Maximal degree in co-relation 20587. Up to 2803 conditions per place. [2024-06-21 20:16:59,600 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 206 selfloop transitions, 100 changer transitions 0/314 dead transitions. [2024-06-21 20:16:59,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 314 transitions, 4737 flow [2024-06-21 20:16:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 20:16:59,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 20:16:59,601 INFO L175 Difference]: Start difference. First operand has 226 places, 289 transitions, 3745 flow. Second operand 6 states and 162 transitions. [2024-06-21 20:16:59,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 314 transitions, 4737 flow [2024-06-21 20:17:00,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 314 transitions, 4555 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:00,090 INFO L231 Difference]: Finished difference. Result has 228 places, 289 transitions, 3786 flow [2024-06-21 20:17:00,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=228, PETRI_TRANSITIONS=289} [2024-06-21 20:17:00,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-21 20:17:00,091 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 289 transitions, 3786 flow [2024-06-21 20:17:00,091 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 20:17:00,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:00,091 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 20:17:00,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:17:00,091 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 20:17:00,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1346620130, now seen corresponding path program 6 times [2024-06-21 20:17:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:00,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29474598] [2024-06-21 20:17:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:00,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:00,214 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 20:17:00,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:00,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29474598] [2024-06-21 20:17:00,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29474598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:00,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:00,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:00,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018354582] [2024-06-21 20:17:00,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:00,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:00,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:00,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:00,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 289 transitions, 3786 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 20:17:00,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:00,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:00,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:00,722 INFO L124 PetriNetUnfolderBase]: 1986/3420 cut-off events. [2024-06-21 20:17:00,722 INFO L125 PetriNetUnfolderBase]: For 146661/146661 co-relation queries the response was YES. [2024-06-21 20:17:00,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20826 conditions, 3420 events. 1986/3420 cut-off events. For 146661/146661 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21661 event pairs, 397 based on Foata normal form. 2/3420 useless extension candidates. Maximal degree in co-relation 20716. Up to 2917 conditions per place. [2024-06-21 20:17:00,757 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 70 changer transitions 0/321 dead transitions. [2024-06-21 20:17:00,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 321 transitions, 4662 flow [2024-06-21 20:17:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 20:17:00,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626016260162602 [2024-06-21 20:17:00,758 INFO L175 Difference]: Start difference. First operand has 228 places, 289 transitions, 3786 flow. Second operand 6 states and 163 transitions. [2024-06-21 20:17:00,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 321 transitions, 4662 flow [2024-06-21 20:17:01,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 321 transitions, 4459 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:01,134 INFO L231 Difference]: Finished difference. Result has 229 places, 295 transitions, 3881 flow [2024-06-21 20:17:01,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3881, PETRI_PLACES=229, PETRI_TRANSITIONS=295} [2024-06-21 20:17:01,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 20:17:01,135 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 295 transitions, 3881 flow [2024-06-21 20:17:01,135 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 20:17:01,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:01,136 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 20:17:01,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:17:01,136 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 20:17:01,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash 47536468, now seen corresponding path program 1 times [2024-06-21 20:17:01,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:01,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663049919] [2024-06-21 20:17:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:01,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:01,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663049919] [2024-06-21 20:17:01,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663049919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:01,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:01,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663181271] [2024-06-21 20:17:01,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:01,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:01,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:01,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 295 transitions, 3881 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:01,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:01,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:01,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:01,768 INFO L124 PetriNetUnfolderBase]: 2007/3453 cut-off events. [2024-06-21 20:17:01,768 INFO L125 PetriNetUnfolderBase]: For 146155/146161 co-relation queries the response was YES. [2024-06-21 20:17:01,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21153 conditions, 3453 events. 2007/3453 cut-off events. For 146155/146161 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21875 event pairs, 423 based on Foata normal form. 1/3448 useless extension candidates. Maximal degree in co-relation 21043. Up to 2969 conditions per place. [2024-06-21 20:17:01,805 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 249 selfloop transitions, 68 changer transitions 0/325 dead transitions. [2024-06-21 20:17:01,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 325 transitions, 4925 flow [2024-06-21 20:17:01,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:17:01,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:17:01,806 INFO L175 Difference]: Start difference. First operand has 229 places, 295 transitions, 3881 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:17:01,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 325 transitions, 4925 flow [2024-06-21 20:17:02,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 325 transitions, 4833 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:02,316 INFO L231 Difference]: Finished difference. Result has 232 places, 304 transitions, 4081 flow [2024-06-21 20:17:02,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4081, PETRI_PLACES=232, PETRI_TRANSITIONS=304} [2024-06-21 20:17:02,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-21 20:17:02,317 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 304 transitions, 4081 flow [2024-06-21 20:17:02,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:02,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:02,318 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 20:17:02,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:17:02,318 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 20:17:02,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1826292646, now seen corresponding path program 2 times [2024-06-21 20:17:02,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:02,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797898515] [2024-06-21 20:17:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:02,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:02,426 INFO 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 20:17:02,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:02,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797898515] [2024-06-21 20:17:02,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797898515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:02,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:02,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700332849] [2024-06-21 20:17:02,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:02,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:02,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:02,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:02,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 304 transitions, 4081 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:02,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:02,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:02,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:02,922 INFO L124 PetriNetUnfolderBase]: 2012/3464 cut-off events. [2024-06-21 20:17:02,922 INFO L125 PetriNetUnfolderBase]: For 151560/151566 co-relation queries the response was YES. [2024-06-21 20:17:02,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21345 conditions, 3464 events. 2012/3464 cut-off events. For 151560/151566 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22001 event pairs, 409 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21234. Up to 3057 conditions per place. [2024-06-21 20:17:02,964 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 35 changer transitions 0/323 dead transitions. [2024-06-21 20:17:02,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 323 transitions, 4807 flow [2024-06-21 20:17:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:17:02,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 20:17:02,965 INFO L175 Difference]: Start difference. First operand has 232 places, 304 transitions, 4081 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:17:02,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 323 transitions, 4807 flow [2024-06-21 20:17:03,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 323 transitions, 4637 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:03,417 INFO L231 Difference]: Finished difference. Result has 235 places, 307 transitions, 4049 flow [2024-06-21 20:17:03,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4049, PETRI_PLACES=235, PETRI_TRANSITIONS=307} [2024-06-21 20:17:03,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 20:17:03,418 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 307 transitions, 4049 flow [2024-06-21 20:17:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:03,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:03,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:03,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:17:03,418 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 20:17:03,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1910341798, now seen corresponding path program 3 times [2024-06-21 20:17:03,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:03,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030788965] [2024-06-21 20:17:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:03,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:03,510 INFO 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 20:17:03,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:03,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030788965] [2024-06-21 20:17:03,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030788965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:03,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:03,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595363680] [2024-06-21 20:17:03,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:03,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:03,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 307 transitions, 4049 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:03,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:03,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:04,074 INFO L124 PetriNetUnfolderBase]: 2017/3467 cut-off events. [2024-06-21 20:17:04,074 INFO L125 PetriNetUnfolderBase]: For 157507/157513 co-relation queries the response was YES. [2024-06-21 20:17:04,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21384 conditions, 3467 events. 2017/3467 cut-off events. For 157507/157513 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22004 event pairs, 424 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21273. Up to 2981 conditions per place. [2024-06-21 20:17:04,107 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 250 selfloop transitions, 70 changer transitions 0/328 dead transitions. [2024-06-21 20:17:04,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 328 transitions, 4999 flow [2024-06-21 20:17:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:17:04,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 20:17:04,108 INFO L175 Difference]: Start difference. First operand has 235 places, 307 transitions, 4049 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:17:04,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 328 transitions, 4999 flow [2024-06-21 20:17:04,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 328 transitions, 4899 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:04,588 INFO L231 Difference]: Finished difference. Result has 236 places, 310 transitions, 4145 flow [2024-06-21 20:17:04,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3949, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4145, PETRI_PLACES=236, PETRI_TRANSITIONS=310} [2024-06-21 20:17:04,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 20:17:04,589 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 310 transitions, 4145 flow [2024-06-21 20:17:04,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:04,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:04,590 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 20:17:04,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:17:04,590 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 20:17:04,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1922721958, now seen corresponding path program 4 times [2024-06-21 20:17:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442214788] [2024-06-21 20:17:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:04,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:04,685 INFO 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 20:17:04,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:04,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442214788] [2024-06-21 20:17:04,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442214788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:04,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:04,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873589899] [2024-06-21 20:17:04,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:04,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:04,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 310 transitions, 4145 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:04,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:04,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:04,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:05,207 INFO L124 PetriNetUnfolderBase]: 2014/3463 cut-off events. [2024-06-21 20:17:05,207 INFO L125 PetriNetUnfolderBase]: For 161064/161070 co-relation queries the response was YES. [2024-06-21 20:17:05,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 3463 events. 2014/3463 cut-off events. For 161064/161070 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21995 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21356. Up to 2978 conditions per place. [2024-06-21 20:17:05,244 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 69 changer transitions 0/324 dead transitions. [2024-06-21 20:17:05,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 324 transitions, 4921 flow [2024-06-21 20:17:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:17:05,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-21 20:17:05,246 INFO L175 Difference]: Start difference. First operand has 236 places, 310 transitions, 4145 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:17:05,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 324 transitions, 4921 flow [2024-06-21 20:17:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 324 transitions, 4721 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:05,754 INFO L231 Difference]: Finished difference. Result has 238 places, 310 transitions, 4089 flow [2024-06-21 20:17:05,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4089, PETRI_PLACES=238, PETRI_TRANSITIONS=310} [2024-06-21 20:17:05,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-21 20:17:05,754 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 310 transitions, 4089 flow [2024-06-21 20:17:05,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:05,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:05,755 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 20:17:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:17:05,755 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 20:17:05,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1672072224, now seen corresponding path program 2 times [2024-06-21 20:17:05,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:05,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506104222] [2024-06-21 20:17:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:05,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:05,855 INFO 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 20:17:05,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506104222] [2024-06-21 20:17:05,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506104222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:05,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950283932] [2024-06-21 20:17:05,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:05,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:05,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:05,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:05,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 310 transitions, 4089 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 20:17:05,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:05,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:05,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:06,385 INFO L124 PetriNetUnfolderBase]: 2019/3467 cut-off events. [2024-06-21 20:17:06,385 INFO L125 PetriNetUnfolderBase]: For 164340/164340 co-relation queries the response was YES. [2024-06-21 20:17:06,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21568 conditions, 3467 events. 2019/3467 cut-off events. For 164340/164340 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21990 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21456. Up to 3013 conditions per place. [2024-06-21 20:17:06,422 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 64 changer transitions 0/329 dead transitions. [2024-06-21 20:17:06,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 329 transitions, 5055 flow [2024-06-21 20:17:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:17:06,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:17:06,423 INFO L175 Difference]: Start difference. First operand has 238 places, 310 transitions, 4089 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:17:06,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 329 transitions, 5055 flow [2024-06-21 20:17:06,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 329 transitions, 4870 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:06,865 INFO L231 Difference]: Finished difference. Result has 240 places, 313 transitions, 4100 flow [2024-06-21 20:17:06,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4100, PETRI_PLACES=240, PETRI_TRANSITIONS=313} [2024-06-21 20:17:06,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 20:17:06,866 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 313 transitions, 4100 flow [2024-06-21 20:17:06,866 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 20:17:06,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:06,866 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 20:17:06,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:17:06,866 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 20:17:06,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:06,866 INFO L85 PathProgramCache]: Analyzing trace with hash -339062328, now seen corresponding path program 5 times [2024-06-21 20:17:06,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:06,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483079434] [2024-06-21 20:17:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:06,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:06,959 INFO 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 20:17:06,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:06,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483079434] [2024-06-21 20:17:06,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483079434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:06,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:06,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:06,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884429204] [2024-06-21 20:17:06,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:06,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:06,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:06,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:06,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 313 transitions, 4100 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:06,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:06,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:06,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:07,461 INFO L124 PetriNetUnfolderBase]: 2013/3464 cut-off events. [2024-06-21 20:17:07,462 INFO L125 PetriNetUnfolderBase]: For 168951/168957 co-relation queries the response was YES. [2024-06-21 20:17:07,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21390 conditions, 3464 events. 2013/3464 cut-off events. For 168951/168957 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22035 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21278. Up to 2994 conditions per place. [2024-06-21 20:17:07,500 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 262 selfloop transitions, 59 changer transitions 0/329 dead transitions. [2024-06-21 20:17:07,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 329 transitions, 4896 flow [2024-06-21 20:17:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 20:17:07,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 20:17:07,501 INFO L175 Difference]: Start difference. First operand has 240 places, 313 transitions, 4100 flow. Second operand 5 states and 129 transitions. [2024-06-21 20:17:07,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 329 transitions, 4896 flow [2024-06-21 20:17:07,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 329 transitions, 4753 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:07,946 INFO L231 Difference]: Finished difference. Result has 241 places, 313 transitions, 4089 flow [2024-06-21 20:17:07,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4089, PETRI_PLACES=241, PETRI_TRANSITIONS=313} [2024-06-21 20:17:07,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 20:17:07,947 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 313 transitions, 4089 flow [2024-06-21 20:17:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:07,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:07,947 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 20:17:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:17:07,947 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 20:17:07,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1702907118, now seen corresponding path program 6 times [2024-06-21 20:17:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:07,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478155626] [2024-06-21 20:17:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:08,050 INFO 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 20:17:08,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:08,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478155626] [2024-06-21 20:17:08,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478155626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:08,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:08,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974284336] [2024-06-21 20:17:08,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:08,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:08,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:08,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:08,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:08,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 313 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:08,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:08,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:08,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:08,567 INFO L124 PetriNetUnfolderBase]: 2007/3462 cut-off events. [2024-06-21 20:17:08,567 INFO L125 PetriNetUnfolderBase]: For 170065/170071 co-relation queries the response was YES. [2024-06-21 20:17:08,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21290 conditions, 3462 events. 2007/3462 cut-off events. For 170065/170071 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22042 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 21176. Up to 2988 conditions per place. [2024-06-21 20:17:08,605 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 67 changer transitions 0/339 dead transitions. [2024-06-21 20:17:08,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 339 transitions, 4817 flow [2024-06-21 20:17:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:17:08,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:17:08,606 INFO L175 Difference]: Start difference. First operand has 241 places, 313 transitions, 4089 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:17:08,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 339 transitions, 4817 flow [2024-06-21 20:17:09,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 339 transitions, 4638 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:09,082 INFO L231 Difference]: Finished difference. Result has 242 places, 313 transitions, 4061 flow [2024-06-21 20:17:09,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3910, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=242, PETRI_TRANSITIONS=313} [2024-06-21 20:17:09,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-21 20:17:09,083 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 313 transitions, 4061 flow [2024-06-21 20:17:09,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:09,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:09,083 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 20:17:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:17:09,083 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 20:17:09,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1936843884, now seen corresponding path program 3 times [2024-06-21 20:17:09,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:09,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273390016] [2024-06-21 20:17:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:09,188 INFO 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 20:17:09,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:09,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273390016] [2024-06-21 20:17:09,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273390016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:09,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:09,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:09,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252860481] [2024-06-21 20:17:09,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:09,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:09,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:09,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:09,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:09,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 313 transitions, 4061 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 20:17:09,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:09,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:09,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:09,688 INFO L124 PetriNetUnfolderBase]: 2004/3458 cut-off events. [2024-06-21 20:17:09,689 INFO L125 PetriNetUnfolderBase]: For 166661/166667 co-relation queries the response was YES. [2024-06-21 20:17:09,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21198 conditions, 3458 events. 2004/3458 cut-off events. For 166661/166667 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22001 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 21084. Up to 2994 conditions per place. [2024-06-21 20:17:09,726 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 257 selfloop transitions, 65 changer transitions 0/330 dead transitions. [2024-06-21 20:17:09,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 330 transitions, 4863 flow [2024-06-21 20:17:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:17:09,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:17:09,727 INFO L175 Difference]: Start difference. First operand has 242 places, 313 transitions, 4061 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:17:09,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 330 transitions, 4863 flow [2024-06-21 20:17:10,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 330 transitions, 4703 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:10,230 INFO L231 Difference]: Finished difference. Result has 241 places, 313 transitions, 4045 flow [2024-06-21 20:17:10,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3905, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4045, PETRI_PLACES=241, PETRI_TRANSITIONS=313} [2024-06-21 20:17:10,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 20:17:10,231 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 313 transitions, 4045 flow [2024-06-21 20:17:10,231 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 20:17:10,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:10,231 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 20:17:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:17:10,231 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 20:17:10,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 145141812, now seen corresponding path program 4 times [2024-06-21 20:17:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:10,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780321350] [2024-06-21 20:17:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:10,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:10,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780321350] [2024-06-21 20:17:10,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780321350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:10,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244876607] [2024-06-21 20:17:10,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:10,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:10,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 313 transitions, 4045 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 20:17:10,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:10,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:10,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:10,860 INFO L124 PetriNetUnfolderBase]: 2001/3443 cut-off events. [2024-06-21 20:17:10,860 INFO L125 PetriNetUnfolderBase]: For 160069/160069 co-relation queries the response was YES. [2024-06-21 20:17:10,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20974 conditions, 3443 events. 2001/3443 cut-off events. For 160069/160069 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21838 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20860. Up to 2991 conditions per place. [2024-06-21 20:17:10,898 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 253 selfloop transitions, 65 changer transitions 0/326 dead transitions. [2024-06-21 20:17:10,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 326 transitions, 4713 flow [2024-06-21 20:17:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:17:10,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 20:17:10,899 INFO L175 Difference]: Start difference. First operand has 241 places, 313 transitions, 4045 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:17:10,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 326 transitions, 4713 flow [2024-06-21 20:17:11,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 326 transitions, 4497 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:11,500 INFO L231 Difference]: Finished difference. Result has 240 places, 313 transitions, 3969 flow [2024-06-21 20:17:11,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3969, PETRI_PLACES=240, PETRI_TRANSITIONS=313} [2024-06-21 20:17:11,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 20:17:11,500 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 313 transitions, 3969 flow [2024-06-21 20:17:11,501 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 20:17:11,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:11,501 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 20:17:11,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:17:11,501 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 20:17:11,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:11,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 2 times [2024-06-21 20:17:11,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:11,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552671266] [2024-06-21 20:17:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:11,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:11,602 INFO 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 20:17:11,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:11,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552671266] [2024-06-21 20:17:11,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552671266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:11,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:11,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:11,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127863925] [2024-06-21 20:17:11,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:11,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:11,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:11,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:11,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 313 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 20:17:11,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:11,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:11,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:12,189 INFO L124 PetriNetUnfolderBase]: 2017/3478 cut-off events. [2024-06-21 20:17:12,189 INFO L125 PetriNetUnfolderBase]: For 164690/164696 co-relation queries the response was YES. [2024-06-21 20:17:12,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21067 conditions, 3478 events. 2017/3478 cut-off events. For 164690/164696 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22149 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 20954. Up to 2991 conditions per place. [2024-06-21 20:17:12,229 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 254 selfloop transitions, 71 changer transitions 0/333 dead transitions. [2024-06-21 20:17:12,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 333 transitions, 4719 flow [2024-06-21 20:17:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:17:12,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:17:12,230 INFO L175 Difference]: Start difference. First operand has 240 places, 313 transitions, 3969 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:17:12,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 333 transitions, 4719 flow [2024-06-21 20:17:12,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 333 transitions, 4543 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:12,664 INFO L231 Difference]: Finished difference. Result has 240 places, 316 transitions, 4009 flow [2024-06-21 20:17:12,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4009, PETRI_PLACES=240, PETRI_TRANSITIONS=316} [2024-06-21 20:17:12,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 20:17:12,665 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 316 transitions, 4009 flow [2024-06-21 20:17:12,665 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 20:17:12,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:12,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:17:12,665 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 20:17:12,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1924322736, now seen corresponding path program 3 times [2024-06-21 20:17:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:12,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102995326] [2024-06-21 20:17:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:12,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:12,808 INFO 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 20:17:12,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:12,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102995326] [2024-06-21 20:17:12,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102995326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:12,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:12,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:12,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158086099] [2024-06-21 20:17:12,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:12,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:12,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:12,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:12,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 316 transitions, 4009 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 20:17:12,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:12,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:12,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:13,398 INFO L124 PetriNetUnfolderBase]: 2033/3504 cut-off events. [2024-06-21 20:17:13,398 INFO L125 PetriNetUnfolderBase]: For 163993/163993 co-relation queries the response was YES. [2024-06-21 20:17:13,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21407 conditions, 3504 events. 2033/3504 cut-off events. For 163993/163993 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22331 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21294. Up to 3067 conditions per place. [2024-06-21 20:17:13,436 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 285 selfloop transitions, 46 changer transitions 0/339 dead transitions. [2024-06-21 20:17:13,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 339 transitions, 4785 flow [2024-06-21 20:17:13,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:17:13,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:17:13,437 INFO L175 Difference]: Start difference. First operand has 240 places, 316 transitions, 4009 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:17:13,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 339 transitions, 4785 flow [2024-06-21 20:17:13,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 339 transitions, 4591 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:13,854 INFO L231 Difference]: Finished difference. Result has 242 places, 319 transitions, 3983 flow [2024-06-21 20:17:13,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3983, PETRI_PLACES=242, PETRI_TRANSITIONS=319} [2024-06-21 20:17:13,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-21 20:17:13,854 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 319 transitions, 3983 flow [2024-06-21 20:17:13,854 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 20:17:13,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:13,855 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 20:17:13,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:17:13,855 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 20:17:13,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1923875406, now seen corresponding path program 4 times [2024-06-21 20:17:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:13,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776913661] [2024-06-21 20:17:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:13,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:13,959 INFO 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 20:17:13,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:13,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776913661] [2024-06-21 20:17:13,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776913661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:13,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:13,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:13,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227662283] [2024-06-21 20:17:13,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:13,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:13,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:13,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:14,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:14,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 319 transitions, 3983 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 20:17:14,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:14,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:14,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:14,574 INFO L124 PetriNetUnfolderBase]: 2065/3558 cut-off events. [2024-06-21 20:17:14,574 INFO L125 PetriNetUnfolderBase]: For 167330/167330 co-relation queries the response was YES. [2024-06-21 20:17:14,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21725 conditions, 3558 events. 2065/3558 cut-off events. For 167330/167330 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22704 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21611. Up to 3060 conditions per place. [2024-06-21 20:17:14,607 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 292 selfloop transitions, 44 changer transitions 0/344 dead transitions. [2024-06-21 20:17:14,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 344 transitions, 4937 flow [2024-06-21 20:17:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:17:14,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 20:17:14,608 INFO L175 Difference]: Start difference. First operand has 242 places, 319 transitions, 3983 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:17:14,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 344 transitions, 4937 flow [2024-06-21 20:17:15,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 344 transitions, 4821 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:15,188 INFO L231 Difference]: Finished difference. Result has 246 places, 325 transitions, 4102 flow [2024-06-21 20:17:15,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3867, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4102, PETRI_PLACES=246, PETRI_TRANSITIONS=325} [2024-06-21 20:17:15,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-21 20:17:15,189 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 325 transitions, 4102 flow [2024-06-21 20:17:15,189 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 20:17:15,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:15,189 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 20:17:15,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:17:15,189 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 20:17:15,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash -457200538, now seen corresponding path program 1 times [2024-06-21 20:17:15,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:15,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238597252] [2024-06-21 20:17:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:15,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:15,305 INFO 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 20:17:15,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:15,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238597252] [2024-06-21 20:17:15,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238597252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:15,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:15,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:15,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293702993] [2024-06-21 20:17:15,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:15,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:15,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:15,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:15,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 325 transitions, 4102 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 20:17:15,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:15,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:15,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:15,927 INFO L124 PetriNetUnfolderBase]: 2094/3599 cut-off events. [2024-06-21 20:17:15,927 INFO L125 PetriNetUnfolderBase]: For 180633/180633 co-relation queries the response was YES. [2024-06-21 20:17:15,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 3599 events. 2094/3599 cut-off events. For 180633/180633 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22967 event pairs, 374 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 22227. Up to 3024 conditions per place. [2024-06-21 20:17:15,967 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 263 selfloop transitions, 83 changer transitions 0/354 dead transitions. [2024-06-21 20:17:15,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 354 transitions, 5078 flow [2024-06-21 20:17:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:17:15,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:17:15,969 INFO L175 Difference]: Start difference. First operand has 246 places, 325 transitions, 4102 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:17:15,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 354 transitions, 5078 flow [2024-06-21 20:17:16,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 354 transitions, 4955 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:16,304 INFO L231 Difference]: Finished difference. Result has 251 places, 331 transitions, 4269 flow [2024-06-21 20:17:16,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4269, PETRI_PLACES=251, PETRI_TRANSITIONS=331} [2024-06-21 20:17:16,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-21 20:17:16,304 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 331 transitions, 4269 flow [2024-06-21 20:17:16,305 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 20:17:16,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:16,305 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 20:17:16,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:17:16,305 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 20:17:16,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash -454343578, now seen corresponding path program 2 times [2024-06-21 20:17:16,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:16,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010892847] [2024-06-21 20:17:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:16,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:16,407 INFO 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 20:17:16,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:16,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010892847] [2024-06-21 20:17:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010892847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:16,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:16,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141255785] [2024-06-21 20:17:16,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:16,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:16,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:16,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 331 transitions, 4269 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 20:17:16,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:16,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:16,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:17,096 INFO L124 PetriNetUnfolderBase]: 2110/3618 cut-off events. [2024-06-21 20:17:17,097 INFO L125 PetriNetUnfolderBase]: For 185689/185689 co-relation queries the response was YES. [2024-06-21 20:17:17,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22708 conditions, 3618 events. 2110/3618 cut-off events. For 185689/185689 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23076 event pairs, 431 based on Foata normal form. 4/3615 useless extension candidates. Maximal degree in co-relation 22590. Up to 3116 conditions per place. [2024-06-21 20:17:17,224 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 78 changer transitions 0/352 dead transitions. [2024-06-21 20:17:17,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 352 transitions, 5063 flow [2024-06-21 20:17:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:17:17,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 20:17:17,225 INFO L175 Difference]: Start difference. First operand has 251 places, 331 transitions, 4269 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:17:17,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 352 transitions, 5063 flow [2024-06-21 20:17:17,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 352 transitions, 4871 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:17,587 INFO L231 Difference]: Finished difference. Result has 255 places, 334 transitions, 4307 flow [2024-06-21 20:17:17,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4307, PETRI_PLACES=255, PETRI_TRANSITIONS=334} [2024-06-21 20:17:17,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-21 20:17:17,588 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 334 transitions, 4307 flow [2024-06-21 20:17:17,588 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 20:17:17,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:17,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:17,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:17:17,589 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 20:17:17,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash -339052408, now seen corresponding path program 3 times [2024-06-21 20:17:17,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:17,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278884598] [2024-06-21 20:17:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:17,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:17,697 INFO 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 20:17:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:17,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278884598] [2024-06-21 20:17:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278884598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:17,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811308650] [2024-06-21 20:17:17,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:17,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:17,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:17,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:17,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 334 transitions, 4307 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 20:17:17,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:17,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:17,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:18,267 INFO L124 PetriNetUnfolderBase]: 2126/3647 cut-off events. [2024-06-21 20:17:18,267 INFO L125 PetriNetUnfolderBase]: For 190282/190282 co-relation queries the response was YES. [2024-06-21 20:17:18,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22881 conditions, 3647 events. 2126/3647 cut-off events. For 190282/190282 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23266 event pairs, 415 based on Foata normal form. 4/3645 useless extension candidates. Maximal degree in co-relation 22761. Up to 3215 conditions per place. [2024-06-21 20:17:18,307 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 39 changer transitions 0/352 dead transitions. [2024-06-21 20:17:18,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 352 transitions, 5073 flow [2024-06-21 20:17:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:17:18,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-21 20:17:18,308 INFO L175 Difference]: Start difference. First operand has 255 places, 334 transitions, 4307 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:17:18,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 352 transitions, 5073 flow [2024-06-21 20:17:18,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 352 transitions, 4897 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:18,744 INFO L231 Difference]: Finished difference. Result has 257 places, 337 transitions, 4263 flow [2024-06-21 20:17:18,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4263, PETRI_PLACES=257, PETRI_TRANSITIONS=337} [2024-06-21 20:17:18,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-21 20:17:18,744 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 337 transitions, 4263 flow [2024-06-21 20:17:18,745 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 20:17:18,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:18,745 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 20:17:18,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:17:18,745 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 20:17:18,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash -338867710, now seen corresponding path program 1 times [2024-06-21 20:17:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:18,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957193765] [2024-06-21 20:17:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:18,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:18,845 INFO 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 20:17:18,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:18,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957193765] [2024-06-21 20:17:18,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957193765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:18,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:18,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:18,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917756733] [2024-06-21 20:17:18,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:18,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:18,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:18,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:18,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:18,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:18,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 337 transitions, 4263 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 20:17:18,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:18,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:18,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:19,394 INFO L124 PetriNetUnfolderBase]: 2142/3670 cut-off events. [2024-06-21 20:17:19,394 INFO L125 PetriNetUnfolderBase]: For 196359/196359 co-relation queries the response was YES. [2024-06-21 20:17:19,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23063 conditions, 3670 events. 2142/3670 cut-off events. For 196359/196359 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23432 event pairs, 424 based on Foata normal form. 4/3668 useless extension candidates. Maximal degree in co-relation 22942. Up to 3190 conditions per place. [2024-06-21 20:17:19,526 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 67 changer transitions 0/355 dead transitions. [2024-06-21 20:17:19,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 355 transitions, 5061 flow [2024-06-21 20:17:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:17:19,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-21 20:17:19,527 INFO L175 Difference]: Start difference. First operand has 257 places, 337 transitions, 4263 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:17:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 355 transitions, 5061 flow [2024-06-21 20:17:19,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 355 transitions, 4957 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:19,874 INFO L231 Difference]: Finished difference. Result has 259 places, 340 transitions, 4373 flow [2024-06-21 20:17:19,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4373, PETRI_PLACES=259, PETRI_TRANSITIONS=340} [2024-06-21 20:17:19,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-21 20:17:19,875 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 340 transitions, 4373 flow [2024-06-21 20:17:19,875 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 20:17:19,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:19,875 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 20:17:19,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:17:19,875 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 20:17:19,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash 144972986, now seen corresponding path program 4 times [2024-06-21 20:17:19,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:19,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913616125] [2024-06-21 20:17:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:19,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:19,974 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 20:17:19,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913616125] [2024-06-21 20:17:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913616125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:19,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:19,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945598407] [2024-06-21 20:17:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:20,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:20,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 340 transitions, 4373 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 20:17:20,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:20,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:20,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:20,555 INFO L124 PetriNetUnfolderBase]: 2132/3662 cut-off events. [2024-06-21 20:17:20,555 INFO L125 PetriNetUnfolderBase]: For 195005/195005 co-relation queries the response was YES. [2024-06-21 20:17:20,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22951 conditions, 3662 events. 2132/3662 cut-off events. For 195005/195005 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23414 event pairs, 358 based on Foata normal form. 4/3660 useless extension candidates. Maximal degree in co-relation 22829. Up to 3115 conditions per place. [2024-06-21 20:17:20,595 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 76 changer transitions 0/364 dead transitions. [2024-06-21 20:17:20,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 364 transitions, 5145 flow [2024-06-21 20:17:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:17:20,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:17:20,596 INFO L175 Difference]: Start difference. First operand has 259 places, 340 transitions, 4373 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:17:20,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 364 transitions, 5145 flow [2024-06-21 20:17:20,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 364 transitions, 4933 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:21,001 INFO L231 Difference]: Finished difference. Result has 261 places, 340 transitions, 4328 flow [2024-06-21 20:17:21,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4328, PETRI_PLACES=261, PETRI_TRANSITIONS=340} [2024-06-21 20:17:21,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 20:17:21,002 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 340 transitions, 4328 flow [2024-06-21 20:17:21,002 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 20:17:21,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:21,002 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 20:17:21,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:17:21,002 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 20:17:21,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash 145157684, now seen corresponding path program 2 times [2024-06-21 20:17:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:21,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25643637] [2024-06-21 20:17:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:21,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25643637] [2024-06-21 20:17:21,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25643637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:21,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:21,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787294095] [2024-06-21 20:17:21,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:21,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:21,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:21,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:21,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 340 transitions, 4328 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 20:17:21,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:21,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:21,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:21,620 INFO L124 PetriNetUnfolderBase]: 2135/3661 cut-off events. [2024-06-21 20:17:21,620 INFO L125 PetriNetUnfolderBase]: For 196555/196555 co-relation queries the response was YES. [2024-06-21 20:17:21,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22893 conditions, 3661 events. 2135/3661 cut-off events. For 196555/196555 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23376 event pairs, 421 based on Foata normal form. 4/3659 useless extension candidates. Maximal degree in co-relation 22770. Up to 3169 conditions per place. [2024-06-21 20:17:21,750 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 278 selfloop transitions, 71 changer transitions 0/357 dead transitions. [2024-06-21 20:17:21,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 357 transitions, 5134 flow [2024-06-21 20:17:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:17:21,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 20:17:21,751 INFO L175 Difference]: Start difference. First operand has 261 places, 340 transitions, 4328 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:17:21,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 357 transitions, 5134 flow [2024-06-21 20:17:22,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 357 transitions, 4970 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:22,276 INFO L231 Difference]: Finished difference. Result has 261 places, 343 transitions, 4396 flow [2024-06-21 20:17:22,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4396, PETRI_PLACES=261, PETRI_TRANSITIONS=343} [2024-06-21 20:17:22,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 20:17:22,277 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 343 transitions, 4396 flow [2024-06-21 20:17:22,277 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 20:17:22,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:22,277 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 20:17:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:17:22,277 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 20:17:22,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1561578098, now seen corresponding path program 3 times [2024-06-21 20:17:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421434858] [2024-06-21 20:17:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:22,402 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 20:17:22,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421434858] [2024-06-21 20:17:22,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421434858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:22,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169963959] [2024-06-21 20:17:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:22,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:22,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:22,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:22,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 343 transitions, 4396 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 20:17:22,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:22,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:22,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:23,154 INFO L124 PetriNetUnfolderBase]: 2151/3693 cut-off events. [2024-06-21 20:17:23,154 INFO L125 PetriNetUnfolderBase]: For 195298/195298 co-relation queries the response was YES. [2024-06-21 20:17:23,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23108 conditions, 3693 events. 2151/3693 cut-off events. For 195298/195298 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23565 event pairs, 399 based on Foata normal form. 4/3695 useless extension candidates. Maximal degree in co-relation 22984. Up to 3245 conditions per place. [2024-06-21 20:17:23,196 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 312 selfloop transitions, 46 changer transitions 0/366 dead transitions. [2024-06-21 20:17:23,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 366 transitions, 5206 flow [2024-06-21 20:17:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:17:23,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:17:23,197 INFO L175 Difference]: Start difference. First operand has 261 places, 343 transitions, 4396 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:17:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 366 transitions, 5206 flow [2024-06-21 20:17:23,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 366 transitions, 5002 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:23,621 INFO L231 Difference]: Finished difference. Result has 263 places, 346 transitions, 4340 flow [2024-06-21 20:17:23,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4192, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4340, PETRI_PLACES=263, PETRI_TRANSITIONS=346} [2024-06-21 20:17:23,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 20:17:23,621 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 346 transitions, 4340 flow [2024-06-21 20:17:23,621 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 20:17:23,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:23,621 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 20:17:23,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:17:23,622 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 20:17:23,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1708414198, now seen corresponding path program 4 times [2024-06-21 20:17:23,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:23,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63574620] [2024-06-21 20:17:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:23,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:23,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:23,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63574620] [2024-06-21 20:17:23,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63574620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:23,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:23,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:23,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576541720] [2024-06-21 20:17:23,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:23,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:23,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:23,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:23,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:23,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 346 transitions, 4340 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 20:17:23,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:23,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:23,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:24,308 INFO L124 PetriNetUnfolderBase]: 2138/3665 cut-off events. [2024-06-21 20:17:24,309 INFO L125 PetriNetUnfolderBase]: For 185606/185606 co-relation queries the response was YES. [2024-06-21 20:17:24,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22470 conditions, 3665 events. 2138/3665 cut-off events. For 185606/185606 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23345 event pairs, 394 based on Foata normal form. 4/3667 useless extension candidates. Maximal degree in co-relation 22345. Up to 3168 conditions per place. [2024-06-21 20:17:24,349 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 309 selfloop transitions, 47 changer transitions 0/364 dead transitions. [2024-06-21 20:17:24,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 364 transitions, 5096 flow [2024-06-21 20:17:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:17:24,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:17:24,350 INFO L175 Difference]: Start difference. First operand has 263 places, 346 transitions, 4340 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:17:24,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 364 transitions, 5096 flow [2024-06-21 20:17:24,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 364 transitions, 4958 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:24,888 INFO L231 Difference]: Finished difference. Result has 265 places, 346 transitions, 4304 flow [2024-06-21 20:17:24,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4304, PETRI_PLACES=265, PETRI_TRANSITIONS=346} [2024-06-21 20:17:24,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 20:17:24,889 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 346 transitions, 4304 flow [2024-06-21 20:17:24,889 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 20:17:24,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:24,889 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 20:17:24,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:17:24,889 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 20:17:24,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1317966559, now seen corresponding path program 1 times [2024-06-21 20:17:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:24,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137111217] [2024-06-21 20:17:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:24,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:25,005 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 20:17:25,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137111217] [2024-06-21 20:17:25,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137111217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:25,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:25,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628654347] [2024-06-21 20:17:25,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:25,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:25,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:25,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:25,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 346 transitions, 4304 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 20:17:25,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:25,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:25,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:25,748 INFO L124 PetriNetUnfolderBase]: 2151/3689 cut-off events. [2024-06-21 20:17:25,748 INFO L125 PetriNetUnfolderBase]: For 188417/188423 co-relation queries the response was YES. [2024-06-21 20:17:25,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22669 conditions, 3689 events. 2151/3689 cut-off events. For 188417/188423 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23579 event pairs, 418 based on Foata normal form. 5/3690 useless extension candidates. Maximal degree in co-relation 22543. Up to 3204 conditions per place. [2024-06-21 20:17:25,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 292 selfloop transitions, 73 changer transitions 0/373 dead transitions. [2024-06-21 20:17:25,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 373 transitions, 5300 flow [2024-06-21 20:17:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:17:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:17:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 20:17:25,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-21 20:17:25,790 INFO L175 Difference]: Start difference. First operand has 265 places, 346 transitions, 4304 flow. Second operand 10 states and 227 transitions. [2024-06-21 20:17:25,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 373 transitions, 5300 flow [2024-06-21 20:17:26,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 373 transitions, 5187 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:26,320 INFO L231 Difference]: Finished difference. Result has 271 places, 352 transitions, 4448 flow [2024-06-21 20:17:26,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4448, PETRI_PLACES=271, PETRI_TRANSITIONS=352} [2024-06-21 20:17:26,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 20:17:26,321 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 352 transitions, 4448 flow [2024-06-21 20:17:26,321 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 20:17:26,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:26,321 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 20:17:26,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:17:26,321 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 20:17:26,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:26,322 INFO L85 PathProgramCache]: Analyzing trace with hash -908945165, now seen corresponding path program 2 times [2024-06-21 20:17:26,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:26,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948017532] [2024-06-21 20:17:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:26,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:26,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948017532] [2024-06-21 20:17:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948017532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486435442] [2024-06-21 20:17:26,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:26,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:26,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:26,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 352 transitions, 4448 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 20:17:26,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:26,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:26,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:27,007 INFO L124 PetriNetUnfolderBase]: 2180/3731 cut-off events. [2024-06-21 20:17:27,007 INFO L125 PetriNetUnfolderBase]: For 202023/202029 co-relation queries the response was YES. [2024-06-21 20:17:27,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23275 conditions, 3731 events. 2180/3731 cut-off events. For 202023/202029 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23869 event pairs, 443 based on Foata normal form. 5/3729 useless extension candidates. Maximal degree in co-relation 23147. Up to 3077 conditions per place. [2024-06-21 20:17:27,050 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 238 selfloop transitions, 137 changer transitions 0/383 dead transitions. [2024-06-21 20:17:27,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 383 transitions, 5686 flow [2024-06-21 20:17:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:17:27,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 20:17:27,051 INFO L175 Difference]: Start difference. First operand has 271 places, 352 transitions, 4448 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:17:27,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 383 transitions, 5686 flow [2024-06-21 20:17:27,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 383 transitions, 5501 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:27,698 INFO L231 Difference]: Finished difference. Result has 271 places, 364 transitions, 4725 flow [2024-06-21 20:17:27,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4725, PETRI_PLACES=271, PETRI_TRANSITIONS=364} [2024-06-21 20:17:27,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 20:17:27,699 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 364 transitions, 4725 flow [2024-06-21 20:17:27,699 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 20:17:27,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:27,699 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 20:17:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:17:27,700 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 20:17:27,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash -525160205, now seen corresponding path program 3 times [2024-06-21 20:17:27,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:27,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765374822] [2024-06-21 20:17:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765374822] [2024-06-21 20:17:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765374822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:27,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:27,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077789192] [2024-06-21 20:17:27,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:27,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:27,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:27,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 364 transitions, 4725 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 20:17:27,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:27,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:27,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:28,415 INFO L124 PetriNetUnfolderBase]: 2185/3740 cut-off events. [2024-06-21 20:17:28,415 INFO L125 PetriNetUnfolderBase]: For 207964/207970 co-relation queries the response was YES. [2024-06-21 20:17:28,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23564 conditions, 3740 events. 2185/3740 cut-off events. For 207964/207970 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23932 event pairs, 443 based on Foata normal form. 5/3738 useless extension candidates. Maximal degree in co-relation 23435. Up to 3083 conditions per place. [2024-06-21 20:17:28,452 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 242 selfloop transitions, 134 changer transitions 0/384 dead transitions. [2024-06-21 20:17:28,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 384 transitions, 5963 flow [2024-06-21 20:17:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:17:28,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 20:17:28,453 INFO L175 Difference]: Start difference. First operand has 271 places, 364 transitions, 4725 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:17:28,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 384 transitions, 5963 flow [2024-06-21 20:17:29,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 384 transitions, 5745 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:29,089 INFO L231 Difference]: Finished difference. Result has 275 places, 367 transitions, 4831 flow [2024-06-21 20:17:29,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4516, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4831, PETRI_PLACES=275, PETRI_TRANSITIONS=367} [2024-06-21 20:17:29,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 20:17:29,090 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 367 transitions, 4831 flow [2024-06-21 20:17:29,090 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 20:17:29,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:29,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:29,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:17:29,091 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 20:17:29,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash -524714735, now seen corresponding path program 4 times [2024-06-21 20:17:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:29,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418583672] [2024-06-21 20:17:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:29,217 INFO 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 20:17:29,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418583672] [2024-06-21 20:17:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418583672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:29,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372023174] [2024-06-21 20:17:29,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:29,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:29,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:29,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 367 transitions, 4831 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 20:17:29,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:29,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:29,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:29,846 INFO L124 PetriNetUnfolderBase]: 2182/3724 cut-off events. [2024-06-21 20:17:29,846 INFO L125 PetriNetUnfolderBase]: For 211367/211367 co-relation queries the response was YES. [2024-06-21 20:17:29,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23552 conditions, 3724 events. 2182/3724 cut-off events. For 211367/211367 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23758 event pairs, 446 based on Foata normal form. 1/3718 useless extension candidates. Maximal degree in co-relation 23422. Up to 3080 conditions per place. [2024-06-21 20:17:29,890 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 147 changer transitions 0/387 dead transitions. [2024-06-21 20:17:29,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 387 transitions, 5905 flow [2024-06-21 20:17:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:17:29,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:17:29,891 INFO L175 Difference]: Start difference. First operand has 275 places, 367 transitions, 4831 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:17:29,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 387 transitions, 5905 flow [2024-06-21 20:17:30,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 387 transitions, 5562 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:30,598 INFO L231 Difference]: Finished difference. Result has 279 places, 367 transitions, 4788 flow [2024-06-21 20:17:30,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4788, PETRI_PLACES=279, PETRI_TRANSITIONS=367} [2024-06-21 20:17:30,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 20:17:30,599 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 367 transitions, 4788 flow [2024-06-21 20:17:30,599 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 20:17:30,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:30,600 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 20:17:30,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:17:30,600 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 20:17:30,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1082165499, now seen corresponding path program 5 times [2024-06-21 20:17:30,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:30,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449361601] [2024-06-21 20:17:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:30,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:30,686 INFO 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 20:17:30,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:30,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449361601] [2024-06-21 20:17:30,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449361601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:30,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:30,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278924906] [2024-06-21 20:17:30,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:30,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:30,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:30,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:30,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:30,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 367 transitions, 4788 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 20:17:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:30,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:30,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:31,242 INFO L124 PetriNetUnfolderBase]: 2179/3736 cut-off events. [2024-06-21 20:17:31,242 INFO L125 PetriNetUnfolderBase]: For 213839/213845 co-relation queries the response was YES. [2024-06-21 20:17:31,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23461 conditions, 3736 events. 2179/3736 cut-off events. For 213839/213845 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23888 event pairs, 448 based on Foata normal form. 1/3731 useless extension candidates. Maximal degree in co-relation 23331. Up to 3077 conditions per place. [2024-06-21 20:17:31,303 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 146 changer transitions 0/390 dead transitions. [2024-06-21 20:17:31,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 390 transitions, 6016 flow [2024-06-21 20:17:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:17:31,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:17:31,305 INFO L175 Difference]: Start difference. First operand has 279 places, 367 transitions, 4788 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:17:31,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 390 transitions, 6016 flow [2024-06-21 20:17:32,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 390 transitions, 5700 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:32,136 INFO L231 Difference]: Finished difference. Result has 279 places, 367 transitions, 4770 flow [2024-06-21 20:17:32,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4770, PETRI_PLACES=279, PETRI_TRANSITIONS=367} [2024-06-21 20:17:32,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 20:17:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 367 transitions, 4770 flow [2024-06-21 20:17:32,137 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 20:17:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:32,137 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 20:17:32,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:17:32,138 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 20:17:32,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1771122647, now seen corresponding path program 6 times [2024-06-21 20:17:32,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:32,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093915857] [2024-06-21 20:17:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:32,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:32,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093915857] [2024-06-21 20:17:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093915857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:32,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:32,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547198431] [2024-06-21 20:17:32,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:32,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:32,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 367 transitions, 4770 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 20:17:32,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:32,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:32,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:32,825 INFO L124 PetriNetUnfolderBase]: 2184/3747 cut-off events. [2024-06-21 20:17:32,825 INFO L125 PetriNetUnfolderBase]: For 219170/219176 co-relation queries the response was YES. [2024-06-21 20:17:32,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23561 conditions, 3747 events. 2184/3747 cut-off events. For 219170/219176 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24039 event pairs, 419 based on Foata normal form. 5/3748 useless extension candidates. Maximal degree in co-relation 23430. Up to 3252 conditions per place. [2024-06-21 20:17:32,866 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 73 changer transitions 0/390 dead transitions. [2024-06-21 20:17:32,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 390 transitions, 5760 flow [2024-06-21 20:17:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:17:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:17:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:17:32,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 20:17:32,867 INFO L175 Difference]: Start difference. First operand has 279 places, 367 transitions, 4770 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:17:32,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 390 transitions, 5760 flow [2024-06-21 20:17:33,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 390 transitions, 5298 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:33,626 INFO L231 Difference]: Finished difference. Result has 281 places, 370 transitions, 4500 flow [2024-06-21 20:17:33,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4500, PETRI_PLACES=281, PETRI_TRANSITIONS=370} [2024-06-21 20:17:33,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 20:17:33,627 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 370 transitions, 4500 flow [2024-06-21 20:17:33,627 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 20:17:33,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:33,627 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 20:17:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:17:33,627 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 20:17:33,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -266807313, now seen corresponding path program 7 times [2024-06-21 20:17:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480558951] [2024-06-21 20:17:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:33,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:33,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480558951] [2024-06-21 20:17:33,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480558951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:33,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:33,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:33,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724648233] [2024-06-21 20:17:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:33,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:33,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:33,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 370 transitions, 4500 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 20:17:33,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:33,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:33,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:34,342 INFO L124 PetriNetUnfolderBase]: 2181/3743 cut-off events. [2024-06-21 20:17:34,342 INFO L125 PetriNetUnfolderBase]: For 219952/219958 co-relation queries the response was YES. [2024-06-21 20:17:34,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23273 conditions, 3743 events. 2181/3743 cut-off events. For 219952/219958 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23999 event pairs, 419 based on Foata normal form. 5/3744 useless extension candidates. Maximal degree in co-relation 23142. Up to 3249 conditions per place. [2024-06-21 20:17:34,384 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 307 selfloop transitions, 72 changer transitions 0/387 dead transitions. [2024-06-21 20:17:34,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 387 transitions, 5300 flow [2024-06-21 20:17:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:17:34,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 20:17:34,385 INFO L175 Difference]: Start difference. First operand has 281 places, 370 transitions, 4500 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:17:34,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 387 transitions, 5300 flow [2024-06-21 20:17:34,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 387 transitions, 5134 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:34,990 INFO L231 Difference]: Finished difference. Result has 281 places, 370 transitions, 4484 flow [2024-06-21 20:17:34,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4484, PETRI_PLACES=281, PETRI_TRANSITIONS=370} [2024-06-21 20:17:34,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 20:17:34,991 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 370 transitions, 4484 flow [2024-06-21 20:17:34,991 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 20:17:34,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:34,991 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 20:17:34,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:17:34,991 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 20:17:34,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1250519927, now seen corresponding path program 8 times [2024-06-21 20:17:34,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:34,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432641673] [2024-06-21 20:17:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:35,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432641673] [2024-06-21 20:17:35,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432641673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:35,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:35,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087858019] [2024-06-21 20:17:35,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:35,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:35,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:35,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 370 transitions, 4484 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 20:17:35,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:35,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:35,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:35,723 INFO L124 PetriNetUnfolderBase]: 2202/3778 cut-off events. [2024-06-21 20:17:35,723 INFO L125 PetriNetUnfolderBase]: For 231039/231045 co-relation queries the response was YES. [2024-06-21 20:17:35,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23685 conditions, 3778 events. 2202/3778 cut-off events. For 231039/231045 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24286 event pairs, 419 based on Foata normal form. 5/3779 useless extension candidates. Maximal degree in co-relation 23553. Up to 3137 conditions per place. [2024-06-21 20:17:35,764 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 151 changer transitions 0/407 dead transitions. [2024-06-21 20:17:35,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 407 transitions, 5911 flow [2024-06-21 20:17:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:17:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:17:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 20:17:35,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-21 20:17:35,765 INFO L175 Difference]: Start difference. First operand has 281 places, 370 transitions, 4484 flow. Second operand 9 states and 220 transitions. [2024-06-21 20:17:35,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 407 transitions, 5911 flow [2024-06-21 20:17:36,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 407 transitions, 5767 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:36,442 INFO L231 Difference]: Finished difference. Result has 284 places, 379 transitions, 4787 flow [2024-06-21 20:17:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4787, PETRI_PLACES=284, PETRI_TRANSITIONS=379} [2024-06-21 20:17:36,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 20:17:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 379 transitions, 4787 flow [2024-06-21 20:17:36,443 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 20:17:36,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:36,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:36,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:17:36,443 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 20:17:36,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash 289536977, now seen corresponding path program 9 times [2024-06-21 20:17:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:36,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690054774] [2024-06-21 20:17:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:36,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:36,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690054774] [2024-06-21 20:17:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690054774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:36,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:36,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:36,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706286270] [2024-06-21 20:17:36,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:36,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:36,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:36,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:36,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 379 transitions, 4787 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 20:17:36,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:36,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:36,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:37,189 INFO L124 PetriNetUnfolderBase]: 2207/3775 cut-off events. [2024-06-21 20:17:37,190 INFO L125 PetriNetUnfolderBase]: For 238000/238000 co-relation queries the response was YES. [2024-06-21 20:17:37,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24055 conditions, 3775 events. 2207/3775 cut-off events. For 238000/238000 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24249 event pairs, 422 based on Foata normal form. 1/3770 useless extension candidates. Maximal degree in co-relation 23922. Up to 3273 conditions per place. [2024-06-21 20:17:37,234 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 311 selfloop transitions, 78 changer transitions 0/397 dead transitions. [2024-06-21 20:17:37,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 397 transitions, 5648 flow [2024-06-21 20:17:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:17:37,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 20:17:37,235 INFO L175 Difference]: Start difference. First operand has 284 places, 379 transitions, 4787 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:17:37,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 397 transitions, 5648 flow [2024-06-21 20:17:38,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 397 transitions, 5280 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:38,161 INFO L231 Difference]: Finished difference. Result has 285 places, 382 transitions, 4634 flow [2024-06-21 20:17:38,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4634, PETRI_PLACES=285, PETRI_TRANSITIONS=382} [2024-06-21 20:17:38,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-21 20:17:38,162 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 382 transitions, 4634 flow [2024-06-21 20:17:38,162 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 20:17:38,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:38,162 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 20:17:38,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:17:38,162 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 20:17:38,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:38,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1920996335, now seen corresponding path program 10 times [2024-06-21 20:17:38,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:38,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370499837] [2024-06-21 20:17:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:38,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:38,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:38,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370499837] [2024-06-21 20:17:38,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370499837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:38,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:38,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:38,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137063419] [2024-06-21 20:17:38,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:38,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:38,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:38,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:38,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 382 transitions, 4634 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 20:17:38,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:38,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:38,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:38,916 INFO L124 PetriNetUnfolderBase]: 2204/3777 cut-off events. [2024-06-21 20:17:38,916 INFO L125 PetriNetUnfolderBase]: For 235479/235485 co-relation queries the response was YES. [2024-06-21 20:17:38,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23691 conditions, 3777 events. 2204/3777 cut-off events. For 235479/235485 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24311 event pairs, 443 based on Foata normal form. 5/3775 useless extension candidates. Maximal degree in co-relation 23558. Up to 3140 conditions per place. [2024-06-21 20:17:38,958 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 259 selfloop transitions, 133 changer transitions 0/400 dead transitions. [2024-06-21 20:17:38,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 400 transitions, 5750 flow [2024-06-21 20:17:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:17:38,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:17:38,959 INFO L175 Difference]: Start difference. First operand has 285 places, 382 transitions, 4634 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:17:38,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 400 transitions, 5750 flow [2024-06-21 20:17:39,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 400 transitions, 5572 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:39,875 INFO L231 Difference]: Finished difference. Result has 285 places, 382 transitions, 4729 flow [2024-06-21 20:17:39,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4729, PETRI_PLACES=285, PETRI_TRANSITIONS=382} [2024-06-21 20:17:39,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-21 20:17:39,876 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 382 transitions, 4729 flow [2024-06-21 20:17:39,876 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 20:17:39,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:39,877 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 20:17:39,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:17:39,877 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 20:17:39,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 280817297, now seen corresponding path program 11 times [2024-06-21 20:17:39,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:39,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360670651] [2024-06-21 20:17:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:39,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:39,975 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 20:17:39,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:39,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360670651] [2024-06-21 20:17:39,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360670651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:39,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:39,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:39,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118192120] [2024-06-21 20:17:39,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:39,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:39,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:40,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:40,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 382 transitions, 4729 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 20:17:40,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:40,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:40,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:40,613 INFO L124 PetriNetUnfolderBase]: 2201/3779 cut-off events. [2024-06-21 20:17:40,613 INFO L125 PetriNetUnfolderBase]: For 237887/237893 co-relation queries the response was YES. [2024-06-21 20:17:40,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23823 conditions, 3779 events. 2201/3779 cut-off events. For 237887/237893 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24360 event pairs, 419 based on Foata normal form. 5/3780 useless extension candidates. Maximal degree in co-relation 23689. Up to 3137 conditions per place. [2024-06-21 20:17:40,655 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 149 changer transitions 0/412 dead transitions. [2024-06-21 20:17:40,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 412 transitions, 6049 flow [2024-06-21 20:17:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:17:40,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:17:40,656 INFO L175 Difference]: Start difference. First operand has 285 places, 382 transitions, 4729 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:17:40,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 412 transitions, 6049 flow [2024-06-21 20:17:41,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 412 transitions, 5757 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:41,344 INFO L231 Difference]: Finished difference. Result has 289 places, 382 transitions, 4746 flow [2024-06-21 20:17:41,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4437, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4746, PETRI_PLACES=289, PETRI_TRANSITIONS=382} [2024-06-21 20:17:41,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 20:17:41,345 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 382 transitions, 4746 flow [2024-06-21 20:17:41,345 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 20:17:41,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:41,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:41,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:17:41,345 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 20:17:41,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash 294632447, now seen corresponding path program 12 times [2024-06-21 20:17:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:41,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075716556] [2024-06-21 20:17:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:41,445 INFO 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 20:17:41,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:41,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075716556] [2024-06-21 20:17:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075716556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:41,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:41,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579757054] [2024-06-21 20:17:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:41,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:41,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 382 transitions, 4746 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 20:17:41,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:41,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:41,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:42,085 INFO L124 PetriNetUnfolderBase]: 2214/3790 cut-off events. [2024-06-21 20:17:42,085 INFO L125 PetriNetUnfolderBase]: For 247085/247085 co-relation queries the response was YES. [2024-06-21 20:17:42,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24147 conditions, 3790 events. 2214/3790 cut-off events. For 247085/247085 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24372 event pairs, 421 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 24012. Up to 3276 conditions per place. [2024-06-21 20:17:42,132 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 314 selfloop transitions, 85 changer transitions 0/407 dead transitions. [2024-06-21 20:17:42,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 407 transitions, 5836 flow [2024-06-21 20:17:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:17:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:17:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-21 20:17:42,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432372505543237 [2024-06-21 20:17:42,133 INFO L175 Difference]: Start difference. First operand has 289 places, 382 transitions, 4746 flow. Second operand 11 states and 245 transitions. [2024-06-21 20:17:42,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 407 transitions, 5836 flow [2024-06-21 20:17:42,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 407 transitions, 5510 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:17:42,882 INFO L231 Difference]: Finished difference. Result has 293 places, 388 transitions, 4718 flow [2024-06-21 20:17:42,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4434, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4718, PETRI_PLACES=293, PETRI_TRANSITIONS=388} [2024-06-21 20:17:42,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 20:17:42,882 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 388 transitions, 4718 flow [2024-06-21 20:17:42,882 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 20:17:42,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:42,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:42,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:17:42,883 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 20:17:42,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:42,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1744620163, now seen corresponding path program 13 times [2024-06-21 20:17:42,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:42,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919980280] [2024-06-21 20:17:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:43,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:43,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919980280] [2024-06-21 20:17:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919980280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:43,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:43,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:43,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171516250] [2024-06-21 20:17:43,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:43,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:43,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:43,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 388 transitions, 4718 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 20:17:43,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:43,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:43,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:43,688 INFO L124 PetriNetUnfolderBase]: 2211/3786 cut-off events. [2024-06-21 20:17:43,688 INFO L125 PetriNetUnfolderBase]: For 243591/243591 co-relation queries the response was YES. [2024-06-21 20:17:43,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23876 conditions, 3786 events. 2211/3786 cut-off events. For 243591/243591 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24365 event pairs, 421 based on Foata normal form. 1/3781 useless extension candidates. Maximal degree in co-relation 23740. Up to 3273 conditions per place. [2024-06-21 20:17:43,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 315 selfloop transitions, 85 changer transitions 0/408 dead transitions. [2024-06-21 20:17:43,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 408 transitions, 5564 flow [2024-06-21 20:17:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:17:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:17:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 283 transitions. [2024-06-21 20:17:43,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5309568480300187 [2024-06-21 20:17:43,731 INFO L175 Difference]: Start difference. First operand has 293 places, 388 transitions, 4718 flow. Second operand 13 states and 283 transitions. [2024-06-21 20:17:43,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 408 transitions, 5564 flow [2024-06-21 20:17:44,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 408 transitions, 5354 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 20:17:44,540 INFO L231 Difference]: Finished difference. Result has 298 places, 388 transitions, 4684 flow [2024-06-21 20:17:44,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4684, PETRI_PLACES=298, PETRI_TRANSITIONS=388} [2024-06-21 20:17:44,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-21 20:17:44,540 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 388 transitions, 4684 flow [2024-06-21 20:17:44,541 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 20:17:44,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:44,541 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 20:17:44,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:17:44,541 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 20:17:44,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash 818508863, now seen corresponding path program 14 times [2024-06-21 20:17:44,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:44,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036372318] [2024-06-21 20:17:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:44,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:44,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036372318] [2024-06-21 20:17:44,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036372318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:44,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:44,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:44,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437936019] [2024-06-21 20:17:44,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:44,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:44,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:44,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 388 transitions, 4684 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 20:17:44,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:44,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:44,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:45,315 INFO L124 PetriNetUnfolderBase]: 2208/3793 cut-off events. [2024-06-21 20:17:45,315 INFO L125 PetriNetUnfolderBase]: For 246533/246539 co-relation queries the response was YES. [2024-06-21 20:17:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23823 conditions, 3793 events. 2208/3793 cut-off events. For 246533/246539 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24492 event pairs, 417 based on Foata normal form. 5/3794 useless extension candidates. Maximal degree in co-relation 23686. Up to 3146 conditions per place. [2024-06-21 20:17:45,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 160 changer transitions 0/415 dead transitions. [2024-06-21 20:17:45,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 415 transitions, 5714 flow [2024-06-21 20:17:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:17:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:17:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 20:17:45,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-21 20:17:45,358 INFO L175 Difference]: Start difference. First operand has 298 places, 388 transitions, 4684 flow. Second operand 10 states and 237 transitions. [2024-06-21 20:17:45,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 415 transitions, 5714 flow [2024-06-21 20:17:46,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 415 transitions, 5524 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 20:17:46,164 INFO L231 Difference]: Finished difference. Result has 296 places, 388 transitions, 4824 flow [2024-06-21 20:17:46,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4824, PETRI_PLACES=296, PETRI_TRANSITIONS=388} [2024-06-21 20:17:46,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-21 20:17:46,165 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 388 transitions, 4824 flow [2024-06-21 20:17:46,165 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 20:17:46,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:46,165 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 20:17:46,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:17:46,165 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 20:17:46,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1413599209, now seen corresponding path program 15 times [2024-06-21 20:17:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113871034] [2024-06-21 20:17:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:46,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:46,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113871034] [2024-06-21 20:17:46,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113871034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:46,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:46,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:46,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179059198] [2024-06-21 20:17:46,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:46,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:46,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:46,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:46,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 388 transitions, 4824 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 20:17:46,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:46,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:46,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:46,871 INFO L124 PetriNetUnfolderBase]: 2205/3787 cut-off events. [2024-06-21 20:17:46,872 INFO L125 PetriNetUnfolderBase]: For 248410/248410 co-relation queries the response was YES. [2024-06-21 20:17:46,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23997 conditions, 3787 events. 2205/3787 cut-off events. For 248410/248410 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24406 event pairs, 398 based on Foata normal form. 1/3786 useless extension candidates. Maximal degree in co-relation 23859. Up to 3289 conditions per place. [2024-06-21 20:17:46,919 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 348 selfloop transitions, 56 changer transitions 0/412 dead transitions. [2024-06-21 20:17:46,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 412 transitions, 5870 flow [2024-06-21 20:17:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:17:46,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 20:17:46,920 INFO L175 Difference]: Start difference. First operand has 296 places, 388 transitions, 4824 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:17:46,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 412 transitions, 5870 flow [2024-06-21 20:17:48,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 412 transitions, 5498 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 20:17:48,021 INFO L231 Difference]: Finished difference. Result has 294 places, 389 transitions, 4634 flow [2024-06-21 20:17:48,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4634, PETRI_PLACES=294, PETRI_TRANSITIONS=389} [2024-06-21 20:17:48,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-21 20:17:48,021 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 389 transitions, 4634 flow [2024-06-21 20:17:48,021 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 20:17:48,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:48,022 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 20:17:48,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:17:48,022 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 20:17:48,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1358711169, now seen corresponding path program 16 times [2024-06-21 20:17:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:48,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998021142] [2024-06-21 20:17:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:48,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:48,138 INFO 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 20:17:48,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:48,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998021142] [2024-06-21 20:17:48,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998021142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:48,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:48,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440455339] [2024-06-21 20:17:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:48,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:48,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:48,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:48,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 389 transitions, 4634 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 20:17:48,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:48,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:48,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:48,769 INFO L124 PetriNetUnfolderBase]: 2202/3774 cut-off events. [2024-06-21 20:17:48,769 INFO L125 PetriNetUnfolderBase]: For 246855/246855 co-relation queries the response was YES. [2024-06-21 20:17:48,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23697 conditions, 3774 events. 2202/3774 cut-off events. For 246855/246855 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24291 event pairs, 420 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 23557. Up to 3140 conditions per place. [2024-06-21 20:17:48,815 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 159 changer transitions 0/415 dead transitions. [2024-06-21 20:17:48,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 415 transitions, 5814 flow [2024-06-21 20:17:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:17:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:17:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-21 20:17:48,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-21 20:17:48,817 INFO L175 Difference]: Start difference. First operand has 294 places, 389 transitions, 4634 flow. Second operand 11 states and 255 transitions. [2024-06-21 20:17:48,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 415 transitions, 5814 flow [2024-06-21 20:17:49,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 415 transitions, 5755 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:49,944 INFO L231 Difference]: Finished difference. Result has 303 places, 389 transitions, 4903 flow [2024-06-21 20:17:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4903, PETRI_PLACES=303, PETRI_TRANSITIONS=389} [2024-06-21 20:17:49,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-21 20:17:49,945 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 389 transitions, 4903 flow [2024-06-21 20:17:49,945 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 20:17:49,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:49,945 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 20:17:49,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:17:49,945 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 20:17:49,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1411257185, now seen corresponding path program 17 times [2024-06-21 20:17:49,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:49,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100499971] [2024-06-21 20:17:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:49,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:50,040 INFO 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 20:17:50,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:50,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100499971] [2024-06-21 20:17:50,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100499971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:50,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:50,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802464067] [2024-06-21 20:17:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:50,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:50,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:50,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 389 transitions, 4903 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 20:17:50,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:50,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:50,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:50,640 INFO L124 PetriNetUnfolderBase]: 2199/3779 cut-off events. [2024-06-21 20:17:50,640 INFO L125 PetriNetUnfolderBase]: For 249086/249086 co-relation queries the response was YES. [2024-06-21 20:17:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23984 conditions, 3779 events. 2199/3779 cut-off events. For 249086/249086 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24324 event pairs, 398 based on Foata normal form. 1/3778 useless extension candidates. Maximal degree in co-relation 23843. Up to 3282 conditions per place. [2024-06-21 20:17:50,686 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 59 changer transitions 0/411 dead transitions. [2024-06-21 20:17:50,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 411 transitions, 5765 flow [2024-06-21 20:17:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:17:50,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 20:17:50,687 INFO L175 Difference]: Start difference. First operand has 303 places, 389 transitions, 4903 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:17:50,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 411 transitions, 5765 flow [2024-06-21 20:17:51,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 411 transitions, 5423 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 20:17:51,618 INFO L231 Difference]: Finished difference. Result has 300 places, 389 transitions, 4693 flow [2024-06-21 20:17:51,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4561, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4693, PETRI_PLACES=300, PETRI_TRANSITIONS=389} [2024-06-21 20:17:51,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-21 20:17:51,619 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 389 transitions, 4693 flow [2024-06-21 20:17:51,619 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 20:17:51,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:51,620 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 20:17:51,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:17:51,620 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 20:17:51,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1358444259, now seen corresponding path program 18 times [2024-06-21 20:17:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:51,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799226076] [2024-06-21 20:17:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:51,727 INFO 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 20:17:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:51,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799226076] [2024-06-21 20:17:51,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799226076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:51,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:51,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:51,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620622536] [2024-06-21 20:17:51,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:51,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:51,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:51,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 389 transitions, 4693 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 20:17:51,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:51,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:51,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:52,441 INFO L124 PetriNetUnfolderBase]: 2204/3779 cut-off events. [2024-06-21 20:17:52,441 INFO L125 PetriNetUnfolderBase]: For 250212/250212 co-relation queries the response was YES. [2024-06-21 20:17:52,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23742 conditions, 3779 events. 2204/3779 cut-off events. For 250212/250212 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24354 event pairs, 420 based on Foata normal form. 1/3774 useless extension candidates. Maximal degree in co-relation 23600. Up to 3143 conditions per place. [2024-06-21 20:17:52,486 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 162 changer transitions 0/419 dead transitions. [2024-06-21 20:17:52,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 419 transitions, 5770 flow [2024-06-21 20:17:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:17:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:17:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 293 transitions. [2024-06-21 20:17:52,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549718574108818 [2024-06-21 20:17:52,487 INFO L175 Difference]: Start difference. First operand has 300 places, 389 transitions, 4693 flow. Second operand 13 states and 293 transitions. [2024-06-21 20:17:52,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 419 transitions, 5770 flow [2024-06-21 20:17:53,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 419 transitions, 5487 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:17:53,347 INFO L231 Difference]: Finished difference. Result has 305 places, 392 transitions, 4781 flow [2024-06-21 20:17:53,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4781, PETRI_PLACES=305, PETRI_TRANSITIONS=392} [2024-06-21 20:17:53,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 20:17:53,347 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 392 transitions, 4781 flow [2024-06-21 20:17:53,348 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 20:17:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:53,348 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 20:17:53,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:17:53,348 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 20:17:53,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1214297419, now seen corresponding path program 19 times [2024-06-21 20:17:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:53,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765381390] [2024-06-21 20:17:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:53,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:53,471 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 20:17:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765381390] [2024-06-21 20:17:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765381390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984713788] [2024-06-21 20:17:53,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:53,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:53,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 392 transitions, 4781 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 20:17:53,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:53,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:53,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:54,084 INFO L124 PetriNetUnfolderBase]: 2201/3774 cut-off events. [2024-06-21 20:17:54,084 INFO L125 PetriNetUnfolderBase]: For 252748/252748 co-relation queries the response was YES. [2024-06-21 20:17:54,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23875 conditions, 3774 events. 2201/3774 cut-off events. For 252748/252748 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24316 event pairs, 422 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 23732. Up to 3140 conditions per place. [2024-06-21 20:17:54,129 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 246 selfloop transitions, 159 changer transitions 0/413 dead transitions. [2024-06-21 20:17:54,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 413 transitions, 5643 flow [2024-06-21 20:17:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:17:54,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 20:17:54,130 INFO L175 Difference]: Start difference. First operand has 305 places, 392 transitions, 4781 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:17:54,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 413 transitions, 5643 flow [2024-06-21 20:17:55,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 413 transitions, 5287 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-21 20:17:55,196 INFO L231 Difference]: Finished difference. Result has 301 places, 392 transitions, 4753 flow [2024-06-21 20:17:55,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4753, PETRI_PLACES=301, PETRI_TRANSITIONS=392} [2024-06-21 20:17:55,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 20:17:55,197 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 392 transitions, 4753 flow [2024-06-21 20:17:55,197 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 20:17:55,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:55,197 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 20:17:55,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:17:55,197 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 20:17:55,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:55,198 INFO L85 PathProgramCache]: Analyzing trace with hash 660354255, now seen corresponding path program 1 times [2024-06-21 20:17:55,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:55,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309125097] [2024-06-21 20:17:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:55,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:55,294 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 20:17:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309125097] [2024-06-21 20:17:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309125097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:55,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:55,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:55,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273604913] [2024-06-21 20:17:55,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:55,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:55,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:55,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:55,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 392 transitions, 4753 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 20:17:55,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:55,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:55,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:55,944 INFO L124 PetriNetUnfolderBase]: 2320/3976 cut-off events. [2024-06-21 20:17:55,944 INFO L125 PetriNetUnfolderBase]: For 332653/332653 co-relation queries the response was YES. [2024-06-21 20:17:55,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26202 conditions, 3976 events. 2320/3976 cut-off events. For 332653/332653 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25823 event pairs, 447 based on Foata normal form. 12/3981 useless extension candidates. Maximal degree in co-relation 26059. Up to 2982 conditions per place. [2024-06-21 20:17:55,997 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 185 changer transitions 0/426 dead transitions. [2024-06-21 20:17:55,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 426 transitions, 5939 flow [2024-06-21 20:17:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:17:55,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 20:17:55,998 INFO L175 Difference]: Start difference. First operand has 301 places, 392 transitions, 4753 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:17:55,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 426 transitions, 5939 flow [2024-06-21 20:17:57,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 426 transitions, 5617 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:57,064 INFO L231 Difference]: Finished difference. Result has 302 places, 396 transitions, 4912 flow [2024-06-21 20:17:57,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4912, PETRI_PLACES=302, PETRI_TRANSITIONS=396} [2024-06-21 20:17:57,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 20:17:57,065 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 396 transitions, 4912 flow [2024-06-21 20:17:57,065 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 20:17:57,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:57,065 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 20:17:57,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:17:57,066 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 20:17:57,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -675914799, now seen corresponding path program 2 times [2024-06-21 20:17:57,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:57,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373498095] [2024-06-21 20:17:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:57,159 INFO 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 20:17:57,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:57,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373498095] [2024-06-21 20:17:57,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373498095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:57,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:57,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:57,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013243991] [2024-06-21 20:17:57,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:57,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:57,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:57,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:57,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 396 transitions, 4912 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 20:17:57,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:57,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:57,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:57,862 INFO L124 PetriNetUnfolderBase]: 2452/4175 cut-off events. [2024-06-21 20:17:57,862 INFO L125 PetriNetUnfolderBase]: For 387914/387914 co-relation queries the response was YES. [2024-06-21 20:17:57,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29117 conditions, 4175 events. 2452/4175 cut-off events. For 387914/387914 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27153 event pairs, 518 based on Foata normal form. 12/4180 useless extension candidates. Maximal degree in co-relation 28973. Up to 3336 conditions per place. [2024-06-21 20:17:57,912 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 177 changer transitions 0/426 dead transitions. [2024-06-21 20:17:57,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 426 transitions, 6096 flow [2024-06-21 20:17:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:17:57,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 20:17:57,915 INFO L175 Difference]: Start difference. First operand has 302 places, 396 transitions, 4912 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:17:57,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 426 transitions, 6096 flow [2024-06-21 20:17:59,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 426 transitions, 5823 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:59,122 INFO L231 Difference]: Finished difference. Result has 305 places, 400 transitions, 5110 flow [2024-06-21 20:17:59,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5110, PETRI_PLACES=305, PETRI_TRANSITIONS=400} [2024-06-21 20:17:59,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 20:17:59,122 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 400 transitions, 5110 flow [2024-06-21 20:17:59,122 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 20:17:59,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:59,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:59,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:17:59,123 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 20:17:59,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash -675766929, now seen corresponding path program 3 times [2024-06-21 20:17:59,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:59,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176963105] [2024-06-21 20:17:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:59,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:59,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:59,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176963105] [2024-06-21 20:17:59,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176963105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:59,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:59,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270383772] [2024-06-21 20:17:59,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:59,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:17:59,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 400 transitions, 5110 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 20:17:59,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:59,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:17:59,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:59,901 INFO L124 PetriNetUnfolderBase]: 2416/4123 cut-off events. [2024-06-21 20:17:59,902 INFO L125 PetriNetUnfolderBase]: For 357005/357005 co-relation queries the response was YES. [2024-06-21 20:17:59,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27724 conditions, 4123 events. 2416/4123 cut-off events. For 357005/357005 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26822 event pairs, 514 based on Foata normal form. 16/4132 useless extension candidates. Maximal degree in co-relation 27579. Up to 3380 conditions per place. [2024-06-21 20:17:59,954 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 173 changer transitions 0/422 dead transitions. [2024-06-21 20:17:59,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 422 transitions, 6006 flow [2024-06-21 20:17:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:17:59,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 20:17:59,955 INFO L175 Difference]: Start difference. First operand has 305 places, 400 transitions, 5110 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:17:59,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 422 transitions, 6006 flow [2024-06-21 20:18:01,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 422 transitions, 5747 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:01,091 INFO L231 Difference]: Finished difference. Result has 309 places, 400 transitions, 5203 flow [2024-06-21 20:18:01,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5203, PETRI_PLACES=309, PETRI_TRANSITIONS=400} [2024-06-21 20:18:01,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 20:18:01,092 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 400 transitions, 5203 flow [2024-06-21 20:18:01,092 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 20:18:01,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:01,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:01,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:18:01,092 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 20:18:01,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1920540945, now seen corresponding path program 4 times [2024-06-21 20:18:01,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:01,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505131565] [2024-06-21 20:18:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:01,203 INFO 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 20:18:01,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:01,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505131565] [2024-06-21 20:18:01,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505131565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:01,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:01,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:01,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760544097] [2024-06-21 20:18:01,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:01,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:01,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:01,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:01,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 400 transitions, 5203 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 20:18:01,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:01,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:01,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:01,957 INFO L124 PetriNetUnfolderBase]: 2472/4227 cut-off events. [2024-06-21 20:18:01,958 INFO L125 PetriNetUnfolderBase]: For 364085/364085 co-relation queries the response was YES. [2024-06-21 20:18:01,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28512 conditions, 4227 events. 2472/4227 cut-off events. For 364085/364085 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 27699 event pairs, 493 based on Foata normal form. 16/4237 useless extension candidates. Maximal degree in co-relation 28365. Up to 3630 conditions per place. [2024-06-21 20:18:02,011 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 78 changer transitions 0/421 dead transitions. [2024-06-21 20:18:02,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 421 transitions, 6141 flow [2024-06-21 20:18:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:18:02,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 20:18:02,012 INFO L175 Difference]: Start difference. First operand has 309 places, 400 transitions, 5203 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:18:02,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 421 transitions, 6141 flow [2024-06-21 20:18:03,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 421 transitions, 5787 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:03,392 INFO L231 Difference]: Finished difference. Result has 310 places, 402 transitions, 5067 flow [2024-06-21 20:18:03,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5067, PETRI_PLACES=310, PETRI_TRANSITIONS=402} [2024-06-21 20:18:03,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 20:18:03,392 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 402 transitions, 5067 flow [2024-06-21 20:18:03,393 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 20:18:03,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:03,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:03,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:18:03,393 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 20:18:03,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 27978989, now seen corresponding path program 5 times [2024-06-21 20:18:03,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:03,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680307348] [2024-06-21 20:18:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:03,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680307348] [2024-06-21 20:18:03,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680307348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:03,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:03,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:03,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164830609] [2024-06-21 20:18:03,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:03,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:03,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:03,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:03,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:03,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:03,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 402 transitions, 5067 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 20:18:03,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:03,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:04,445 INFO L124 PetriNetUnfolderBase]: 2604/4431 cut-off events. [2024-06-21 20:18:04,445 INFO L125 PetriNetUnfolderBase]: For 417007/417007 co-relation queries the response was YES. [2024-06-21 20:18:04,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31181 conditions, 4431 events. 2604/4431 cut-off events. For 417007/417007 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 29102 event pairs, 513 based on Foata normal form. 12/4437 useless extension candidates. Maximal degree in co-relation 31033. Up to 3674 conditions per place. [2024-06-21 20:18:04,507 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 84 changer transitions 0/429 dead transitions. [2024-06-21 20:18:04,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 429 transitions, 6259 flow [2024-06-21 20:18:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:18:04,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 20:18:04,508 INFO L175 Difference]: Start difference. First operand has 310 places, 402 transitions, 5067 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:18:04,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 429 transitions, 6259 flow [2024-06-21 20:18:05,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 429 transitions, 6077 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:05,822 INFO L231 Difference]: Finished difference. Result has 312 places, 406 transitions, 5174 flow [2024-06-21 20:18:05,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5174, PETRI_PLACES=312, PETRI_TRANSITIONS=406} [2024-06-21 20:18:05,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 20:18:05,823 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 406 transitions, 5174 flow [2024-06-21 20:18:05,823 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 20:18:05,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:05,823 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 20:18:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:18:05,823 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 20:18:05,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1915178565, now seen corresponding path program 6 times [2024-06-21 20:18:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:05,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616633893] [2024-06-21 20:18:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:05,933 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 20:18:05,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:05,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616633893] [2024-06-21 20:18:05,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616633893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:05,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714856634] [2024-06-21 20:18:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:05,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:05,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:05,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 406 transitions, 5174 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 20:18:05,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:05,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:05,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:06,749 INFO L124 PetriNetUnfolderBase]: 2568/4379 cut-off events. [2024-06-21 20:18:06,749 INFO L125 PetriNetUnfolderBase]: For 385139/385139 co-relation queries the response was YES. [2024-06-21 20:18:06,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29539 conditions, 4379 events. 2568/4379 cut-off events. For 385139/385139 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28775 event pairs, 509 based on Foata normal form. 16/4389 useless extension candidates. Maximal degree in co-relation 29390. Up to 3782 conditions per place. [2024-06-21 20:18:06,800 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 79 changer transitions 0/427 dead transitions. [2024-06-21 20:18:06,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 427 transitions, 6076 flow [2024-06-21 20:18:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:18:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:18:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 20:18:06,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-21 20:18:06,801 INFO L175 Difference]: Start difference. First operand has 312 places, 406 transitions, 5174 flow. Second operand 10 states and 229 transitions. [2024-06-21 20:18:06,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 427 transitions, 6076 flow [2024-06-21 20:18:08,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 427 transitions, 5917 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:08,081 INFO L231 Difference]: Finished difference. Result has 318 places, 406 transitions, 5179 flow [2024-06-21 20:18:08,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5015, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5179, PETRI_PLACES=318, PETRI_TRANSITIONS=406} [2024-06-21 20:18:08,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 20:18:08,081 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 406 transitions, 5179 flow [2024-06-21 20:18:08,081 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 20:18:08,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:08,082 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 20:18:08,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:18:08,082 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 20:18:08,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash 33704441, now seen corresponding path program 1 times [2024-06-21 20:18:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532360389] [2024-06-21 20:18:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:08,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:08,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:08,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532360389] [2024-06-21 20:18:08,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532360389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:08,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:08,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:08,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481101995] [2024-06-21 20:18:08,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:08,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:08,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:08,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:08,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 406 transitions, 5179 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 20:18:08,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:08,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:08,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:08,969 INFO L124 PetriNetUnfolderBase]: 2608/4451 cut-off events. [2024-06-21 20:18:08,969 INFO L125 PetriNetUnfolderBase]: For 377902/377902 co-relation queries the response was YES. [2024-06-21 20:18:09,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29897 conditions, 4451 events. 2608/4451 cut-off events. For 377902/377902 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29391 event pairs, 509 based on Foata normal form. 12/4457 useless extension candidates. Maximal degree in co-relation 29746. Up to 3722 conditions per place. [2024-06-21 20:18:09,029 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 338 selfloop transitions, 86 changer transitions 0/432 dead transitions. [2024-06-21 20:18:09,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 432 transitions, 6159 flow [2024-06-21 20:18:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:18:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:18:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 20:18:09,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 20:18:09,030 INFO L175 Difference]: Start difference. First operand has 318 places, 406 transitions, 5179 flow. Second operand 10 states and 231 transitions. [2024-06-21 20:18:09,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 432 transitions, 6159 flow [2024-06-21 20:18:10,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 432 transitions, 5985 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 20:18:10,411 INFO L231 Difference]: Finished difference. Result has 319 places, 408 transitions, 5240 flow [2024-06-21 20:18:10,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5240, PETRI_PLACES=319, PETRI_TRANSITIONS=408} [2024-06-21 20:18:10,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 20:18:10,412 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 408 transitions, 5240 flow [2024-06-21 20:18:10,412 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 20:18:10,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:10,412 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 20:18:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:18:10,412 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 20:18:10,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1411534015, now seen corresponding path program 7 times [2024-06-21 20:18:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:10,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952677758] [2024-06-21 20:18:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:10,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:10,524 INFO 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 20:18:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:10,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952677758] [2024-06-21 20:18:10,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952677758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:10,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:10,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:10,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828941656] [2024-06-21 20:18:10,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:10,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:10,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:10,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:10,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:10,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:10,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 408 transitions, 5240 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 20:18:10,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:10,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:10,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:11,383 INFO L124 PetriNetUnfolderBase]: 2672/4568 cut-off events. [2024-06-21 20:18:11,384 INFO L125 PetriNetUnfolderBase]: For 401585/401585 co-relation queries the response was YES. [2024-06-21 20:18:11,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30822 conditions, 4568 events. 2672/4568 cut-off events. For 401585/401585 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30287 event pairs, 450 based on Foata normal form. 16/4582 useless extension candidates. Maximal degree in co-relation 30670. Up to 3914 conditions per place. [2024-06-21 20:18:11,436 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 67 changer transitions 0/442 dead transitions. [2024-06-21 20:18:11,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 442 transitions, 6276 flow [2024-06-21 20:18:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 20:18:11,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-21 20:18:11,437 INFO L175 Difference]: Start difference. First operand has 319 places, 408 transitions, 5240 flow. Second operand 7 states and 186 transitions. [2024-06-21 20:18:11,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 442 transitions, 6276 flow [2024-06-21 20:18:13,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 442 transitions, 6067 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 20:18:13,034 INFO L231 Difference]: Finished difference. Result has 318 places, 412 transitions, 5265 flow [2024-06-21 20:18:13,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5265, PETRI_PLACES=318, PETRI_TRANSITIONS=412} [2024-06-21 20:18:13,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 20:18:13,034 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 412 transitions, 5265 flow [2024-06-21 20:18:13,034 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 20:18:13,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:13,034 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 20:18:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:18:13,034 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 20:18:13,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1214307339, now seen corresponding path program 8 times [2024-06-21 20:18:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:13,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368936656] [2024-06-21 20:18:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:13,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:13,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:13,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368936656] [2024-06-21 20:18:13,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368936656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:13,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:13,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:13,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932114383] [2024-06-21 20:18:13,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:13,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:13,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:13,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 412 transitions, 5265 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 20:18:13,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:13,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:13,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:13,922 INFO L124 PetriNetUnfolderBase]: 2728/4643 cut-off events. [2024-06-21 20:18:13,922 INFO L125 PetriNetUnfolderBase]: For 414478/414478 co-relation queries the response was YES. [2024-06-21 20:18:13,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31466 conditions, 4643 events. 2728/4643 cut-off events. For 414478/414478 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30800 event pairs, 539 based on Foata normal form. 16/4653 useless extension candidates. Maximal degree in co-relation 31313. Up to 3841 conditions per place. [2024-06-21 20:18:13,981 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 268 selfloop transitions, 163 changer transitions 0/439 dead transitions. [2024-06-21 20:18:13,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 439 transitions, 6267 flow [2024-06-21 20:18:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:18:13,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 20:18:13,982 INFO L175 Difference]: Start difference. First operand has 318 places, 412 transitions, 5265 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:18:13,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 439 transitions, 6267 flow [2024-06-21 20:18:15,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 439 transitions, 6109 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:15,420 INFO L231 Difference]: Finished difference. Result has 321 places, 414 transitions, 5511 flow [2024-06-21 20:18:15,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5511, PETRI_PLACES=321, PETRI_TRANSITIONS=414} [2024-06-21 20:18:15,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-21 20:18:15,421 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 414 transitions, 5511 flow [2024-06-21 20:18:15,421 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 20:18:15,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:15,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:18:15,421 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 20:18:15,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 199196511, now seen corresponding path program 9 times [2024-06-21 20:18:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:15,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338844096] [2024-06-21 20:18:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:15,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:15,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338844096] [2024-06-21 20:18:15,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338844096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:15,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:15,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:15,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910693310] [2024-06-21 20:18:15,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:15,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:15,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:15,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 414 transitions, 5511 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 20:18:15,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:15,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:15,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:16,427 INFO L124 PetriNetUnfolderBase]: 2768/4716 cut-off events. [2024-06-21 20:18:16,427 INFO L125 PetriNetUnfolderBase]: For 409309/409309 co-relation queries the response was YES. [2024-06-21 20:18:16,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32204 conditions, 4716 events. 2768/4716 cut-off events. For 409309/409309 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 31389 event pairs, 476 based on Foata normal form. 12/4722 useless extension candidates. Maximal degree in co-relation 32050. Up to 3503 conditions per place. [2024-06-21 20:18:16,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 181 changer transitions 0/448 dead transitions. [2024-06-21 20:18:16,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 448 transitions, 6731 flow [2024-06-21 20:18:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:16,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:18:16,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:18:16,484 INFO L175 Difference]: Start difference. First operand has 321 places, 414 transitions, 5511 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:18:16,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 448 transitions, 6731 flow [2024-06-21 20:18:18,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 448 transitions, 6367 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:18,090 INFO L231 Difference]: Finished difference. Result has 323 places, 416 transitions, 5588 flow [2024-06-21 20:18:18,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5588, PETRI_PLACES=323, PETRI_TRANSITIONS=416} [2024-06-21 20:18:18,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-21 20:18:18,090 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 416 transitions, 5588 flow [2024-06-21 20:18:18,091 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 20:18:18,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:18,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:18,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:18:18,091 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 20:18:18,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1358434339, now seen corresponding path program 10 times [2024-06-21 20:18:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:18,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887408361] [2024-06-21 20:18:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:18,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887408361] [2024-06-21 20:18:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887408361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:18,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015421410] [2024-06-21 20:18:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:18,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:18,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:18,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:18,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 416 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 20:18:18,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:18,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:18,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:19,064 INFO L124 PetriNetUnfolderBase]: 2778/4729 cut-off events. [2024-06-21 20:18:19,064 INFO L125 PetriNetUnfolderBase]: For 396129/396129 co-relation queries the response was YES. [2024-06-21 20:18:19,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31678 conditions, 4729 events. 2778/4729 cut-off events. For 396129/396129 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31505 event pairs, 545 based on Foata normal form. 16/4739 useless extension candidates. Maximal degree in co-relation 31523. Up to 3923 conditions per place. [2024-06-21 20:18:19,124 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 166 changer transitions 0/444 dead transitions. [2024-06-21 20:18:19,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 444 transitions, 6578 flow [2024-06-21 20:18:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:18:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:18:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-21 20:18:19,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-21 20:18:19,125 INFO L175 Difference]: Start difference. First operand has 323 places, 416 transitions, 5588 flow. Second operand 10 states and 238 transitions. [2024-06-21 20:18:19,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 444 transitions, 6578 flow [2024-06-21 20:18:20,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 444 transitions, 6010 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 20:18:20,770 INFO L231 Difference]: Finished difference. Result has 324 places, 417 transitions, 5402 flow [2024-06-21 20:18:20,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5024, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5402, PETRI_PLACES=324, PETRI_TRANSITIONS=417} [2024-06-21 20:18:20,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 20:18:20,770 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 417 transitions, 5402 flow [2024-06-21 20:18:20,771 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 20:18:20,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:20,771 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 20:18:20,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:18:20,771 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 20:18:20,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1358219137, now seen corresponding path program 2 times [2024-06-21 20:18:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687811438] [2024-06-21 20:18:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:20,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:20,876 INFO 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 20:18:20,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:20,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687811438] [2024-06-21 20:18:20,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687811438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:20,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:20,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:20,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801010291] [2024-06-21 20:18:20,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:20,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:20,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:20,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:20,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:20,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:20,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 417 transitions, 5402 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 20:18:20,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:20,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:20,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:21,801 INFO L124 PetriNetUnfolderBase]: 2818/4801 cut-off events. [2024-06-21 20:18:21,801 INFO L125 PetriNetUnfolderBase]: For 378071/378071 co-relation queries the response was YES. [2024-06-21 20:18:21,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31231 conditions, 4801 events. 2818/4801 cut-off events. For 378071/378071 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32036 event pairs, 535 based on Foata normal form. 12/4807 useless extension candidates. Maximal degree in co-relation 31078. Up to 3739 conditions per place. [2024-06-21 20:18:21,858 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 261 selfloop transitions, 180 changer transitions 0/449 dead transitions. [2024-06-21 20:18:21,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 449 transitions, 6436 flow [2024-06-21 20:18:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:18:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:18:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-21 20:18:21,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:18:21,859 INFO L175 Difference]: Start difference. First operand has 324 places, 417 transitions, 5402 flow. Second operand 10 states and 240 transitions. [2024-06-21 20:18:21,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 449 transitions, 6436 flow [2024-06-21 20:18:23,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 449 transitions, 6072 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 20:18:23,458 INFO L231 Difference]: Finished difference. Result has 325 places, 419 transitions, 5468 flow [2024-06-21 20:18:23,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=315, 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=10, PETRI_FLOW=5468, PETRI_PLACES=325, PETRI_TRANSITIONS=419} [2024-06-21 20:18:23,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-21 20:18:23,459 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 419 transitions, 5468 flow [2024-06-21 20:18:23,459 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 20:18:23,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:23,459 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 20:18:23,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:18:23,459 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 20:18:23,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1411749217, now seen corresponding path program 3 times [2024-06-21 20:18:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:23,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148769540] [2024-06-21 20:18:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:23,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:23,565 INFO 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 20:18:23,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148769540] [2024-06-21 20:18:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148769540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665840643] [2024-06-21 20:18:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:23,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:23,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 419 transitions, 5468 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 20:18:23,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:23,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:23,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:24,399 INFO L124 PetriNetUnfolderBase]: 2858/4886 cut-off events. [2024-06-21 20:18:24,399 INFO L125 PetriNetUnfolderBase]: For 377186/377186 co-relation queries the response was YES. [2024-06-21 20:18:24,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31718 conditions, 4886 events. 2858/4886 cut-off events. For 377186/377186 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32840 event pairs, 476 based on Foata normal form. 12/4896 useless extension candidates. Maximal degree in co-relation 31565. Up to 4152 conditions per place. [2024-06-21 20:18:24,462 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 69 changer transitions 0/451 dead transitions. [2024-06-21 20:18:24,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 451 transitions, 6512 flow [2024-06-21 20:18:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:18:24,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-21 20:18:24,463 INFO L175 Difference]: Start difference. First operand has 325 places, 419 transitions, 5468 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:18:24,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 451 transitions, 6512 flow [2024-06-21 20:18:26,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 451 transitions, 6108 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 20:18:26,216 INFO L231 Difference]: Finished difference. Result has 324 places, 421 transitions, 5273 flow [2024-06-21 20:18:26,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5273, PETRI_PLACES=324, PETRI_TRANSITIONS=421} [2024-06-21 20:18:26,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 20:18:26,216 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 421 transitions, 5273 flow [2024-06-21 20:18:26,216 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 20:18:26,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:26,216 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 20:18:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:18:26,217 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 20:18:26,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1421233641, now seen corresponding path program 4 times [2024-06-21 20:18:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:26,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708293244] [2024-06-21 20:18:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:26,322 INFO 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 20:18:26,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708293244] [2024-06-21 20:18:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708293244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:26,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:26,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675479011] [2024-06-21 20:18:26,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:26,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:26,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:26,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:26,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 421 transitions, 5273 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 20:18:26,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:26,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:26,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:27,205 INFO L124 PetriNetUnfolderBase]: 2924/4998 cut-off events. [2024-06-21 20:18:27,205 INFO L125 PetriNetUnfolderBase]: For 393928/393928 co-relation queries the response was YES. [2024-06-21 20:18:27,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32444 conditions, 4998 events. 2924/4998 cut-off events. For 393928/393928 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33705 event pairs, 457 based on Foata normal form. 12/5008 useless extension candidates. Maximal degree in co-relation 32290. Up to 3972 conditions per place. [2024-06-21 20:18:27,269 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 72 changer transitions 0/453 dead transitions. [2024-06-21 20:18:27,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 453 transitions, 6515 flow [2024-06-21 20:18:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:18:27,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 20:18:27,269 INFO L175 Difference]: Start difference. First operand has 324 places, 421 transitions, 5273 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:18:27,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 453 transitions, 6515 flow [2024-06-21 20:18:28,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 453 transitions, 6336 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:28,526 INFO L231 Difference]: Finished difference. Result has 327 places, 424 transitions, 5372 flow [2024-06-21 20:18:28,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5372, PETRI_PLACES=327, PETRI_TRANSITIONS=424} [2024-06-21 20:18:28,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-21 20:18:28,527 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 424 transitions, 5372 flow [2024-06-21 20:18:28,527 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 20:18:28,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:28,527 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 20:18:28,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:18:28,527 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 20:18:28,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1491753271, now seen corresponding path program 1 times [2024-06-21 20:18:28,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:28,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411890067] [2024-06-21 20:18:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:28,633 INFO 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 20:18:28,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:28,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411890067] [2024-06-21 20:18:28,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411890067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:28,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:28,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:28,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572618316] [2024-06-21 20:18:28,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:28,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:28,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:28,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:28,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 424 transitions, 5372 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 20:18:28,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:28,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:28,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:29,479 INFO L124 PetriNetUnfolderBase]: 2945/5024 cut-off events. [2024-06-21 20:18:29,479 INFO L125 PetriNetUnfolderBase]: For 369240/369246 co-relation queries the response was YES. [2024-06-21 20:18:29,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32950 conditions, 5024 events. 2945/5024 cut-off events. For 369240/369246 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33917 event pairs, 601 based on Foata normal form. 1/5019 useless extension candidates. Maximal degree in co-relation 32794. Up to 4244 conditions per place. [2024-06-21 20:18:29,544 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 105 changer transitions 0/469 dead transitions. [2024-06-21 20:18:29,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 469 transitions, 7042 flow [2024-06-21 20:18:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:18:29,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-21 20:18:29,545 INFO L175 Difference]: Start difference. First operand has 327 places, 424 transitions, 5372 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:18:29,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 469 transitions, 7042 flow [2024-06-21 20:18:31,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 469 transitions, 6914 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:31,506 INFO L231 Difference]: Finished difference. Result has 331 places, 436 transitions, 5610 flow [2024-06-21 20:18:31,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5610, PETRI_PLACES=331, PETRI_TRANSITIONS=436} [2024-06-21 20:18:31,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 20:18:31,507 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 436 transitions, 5610 flow [2024-06-21 20:18:31,507 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 20:18:31,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:31,507 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 20:18:31,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:18:31,508 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 20:18:31,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633301, now seen corresponding path program 2 times [2024-06-21 20:18:31,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:31,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468912506] [2024-06-21 20:18:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:31,629 INFO 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 20:18:31,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:31,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468912506] [2024-06-21 20:18:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468912506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:31,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:31,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16165921] [2024-06-21 20:18:31,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:31,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:31,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:31,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:31,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:31,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:31,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 436 transitions, 5610 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 20:18:31,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:31,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:32,497 INFO L124 PetriNetUnfolderBase]: 2955/5042 cut-off events. [2024-06-21 20:18:32,497 INFO L125 PetriNetUnfolderBase]: For 375910/375916 co-relation queries the response was YES. [2024-06-21 20:18:32,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33497 conditions, 5042 events. 2955/5042 cut-off events. For 375910/375916 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34066 event pairs, 577 based on Foata normal form. 5/5043 useless extension candidates. Maximal degree in co-relation 33340. Up to 4442 conditions per place. [2024-06-21 20:18:32,562 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 60 changer transitions 0/469 dead transitions. [2024-06-21 20:18:32,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 469 transitions, 6681 flow [2024-06-21 20:18:32,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:18:32,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:18:32,563 INFO L175 Difference]: Start difference. First operand has 331 places, 436 transitions, 5610 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:18:32,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 469 transitions, 6681 flow [2024-06-21 20:18:34,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 469 transitions, 6530 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-21 20:18:34,284 INFO L231 Difference]: Finished difference. Result has 337 places, 442 transitions, 5672 flow [2024-06-21 20:18:34,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5672, PETRI_PLACES=337, PETRI_TRANSITIONS=442} [2024-06-21 20:18:34,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-21 20:18:34,284 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 442 transitions, 5672 flow [2024-06-21 20:18:34,284 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 20:18:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:34,284 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 20:18:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:18:34,284 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 20:18:34,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:34,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633115, now seen corresponding path program 1 times [2024-06-21 20:18:34,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:34,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683991853] [2024-06-21 20:18:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:34,376 INFO 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 20:18:34,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683991853] [2024-06-21 20:18:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683991853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:34,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:34,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434570044] [2024-06-21 20:18:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:34,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:34,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:34,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 442 transitions, 5672 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 20:18:34,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:34,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:34,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:35,222 INFO L124 PetriNetUnfolderBase]: 2976/5075 cut-off events. [2024-06-21 20:18:35,222 INFO L125 PetriNetUnfolderBase]: For 384326/384332 co-relation queries the response was YES. [2024-06-21 20:18:35,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33948 conditions, 5075 events. 2976/5075 cut-off events. For 384326/384332 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34300 event pairs, 587 based on Foata normal form. 5/5076 useless extension candidates. Maximal degree in co-relation 33788. Up to 4340 conditions per place. [2024-06-21 20:18:35,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 120 changer transitions 0/481 dead transitions. [2024-06-21 20:18:35,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 481 transitions, 7340 flow [2024-06-21 20:18:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 20:18:35,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 20:18:35,293 INFO L175 Difference]: Start difference. First operand has 337 places, 442 transitions, 5672 flow. Second operand 8 states and 204 transitions. [2024-06-21 20:18:35,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 481 transitions, 7340 flow [2024-06-21 20:18:37,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 481 transitions, 7231 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:37,110 INFO L231 Difference]: Finished difference. Result has 341 places, 451 transitions, 5929 flow [2024-06-21 20:18:37,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5929, PETRI_PLACES=341, PETRI_TRANSITIONS=451} [2024-06-21 20:18:37,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-21 20:18:37,111 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 451 transitions, 5929 flow [2024-06-21 20:18:37,111 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 20:18:37,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:37,111 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 20:18:37,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:18:37,111 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 20:18:37,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:37,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1405115685, now seen corresponding path program 3 times [2024-06-21 20:18:37,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:37,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515918616] [2024-06-21 20:18:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:37,214 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 20:18:37,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515918616] [2024-06-21 20:18:37,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515918616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:37,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:37,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354067858] [2024-06-21 20:18:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:37,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:37,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:37,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:37,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 451 transitions, 5929 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 20:18:37,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:37,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:37,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:38,157 INFO L124 PetriNetUnfolderBase]: 2994/5102 cut-off events. [2024-06-21 20:18:38,157 INFO L125 PetriNetUnfolderBase]: For 396971/396977 co-relation queries the response was YES. [2024-06-21 20:18:38,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34462 conditions, 5102 events. 2994/5102 cut-off events. For 396971/396977 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34466 event pairs, 576 based on Foata normal form. 5/5103 useless extension candidates. Maximal degree in co-relation 34301. Up to 4488 conditions per place. [2024-06-21 20:18:38,225 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 70 changer transitions 0/491 dead transitions. [2024-06-21 20:18:38,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 491 transitions, 7243 flow [2024-06-21 20:18:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:18:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:18:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-21 20:18:38,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676274944567627 [2024-06-21 20:18:38,226 INFO L175 Difference]: Start difference. First operand has 341 places, 451 transitions, 5929 flow. Second operand 11 states and 256 transitions. [2024-06-21 20:18:38,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 491 transitions, 7243 flow [2024-06-21 20:18:40,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 491 transitions, 6955 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:40,033 INFO L231 Difference]: Finished difference. Result has 348 places, 460 transitions, 5901 flow [2024-06-21 20:18:40,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5901, PETRI_PLACES=348, PETRI_TRANSITIONS=460} [2024-06-21 20:18:40,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 20:18:40,033 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 460 transitions, 5901 flow [2024-06-21 20:18:40,033 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 20:18:40,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:40,034 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 20:18:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:18:40,034 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 20:18:40,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1232388459, now seen corresponding path program 2 times [2024-06-21 20:18:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:40,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681035173] [2024-06-21 20:18:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:40,135 INFO 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 20:18:40,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681035173] [2024-06-21 20:18:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681035173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:40,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041565348] [2024-06-21 20:18:40,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:40,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:40,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:40,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 460 transitions, 5901 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 20:18:40,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:40,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:40,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:41,033 INFO L124 PetriNetUnfolderBase]: 2999/5112 cut-off events. [2024-06-21 20:18:41,033 INFO L125 PetriNetUnfolderBase]: For 404978/404984 co-relation queries the response was YES. [2024-06-21 20:18:41,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34438 conditions, 5112 events. 2999/5112 cut-off events. For 404978/404984 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34617 event pairs, 597 based on Foata normal form. 5/5112 useless extension candidates. Maximal degree in co-relation 34275. Up to 4368 conditions per place. [2024-06-21 20:18:41,107 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 125 changer transitions 0/489 dead transitions. [2024-06-21 20:18:41,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 489 transitions, 7319 flow [2024-06-21 20:18:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:18:41,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:18:41,108 INFO L175 Difference]: Start difference. First operand has 348 places, 460 transitions, 5901 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:18:41,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 489 transitions, 7319 flow [2024-06-21 20:18:42,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 489 transitions, 7132 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 20:18:42,970 INFO L231 Difference]: Finished difference. Result has 347 places, 463 transitions, 6002 flow [2024-06-21 20:18:42,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6002, PETRI_PLACES=347, PETRI_TRANSITIONS=463} [2024-06-21 20:18:42,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-21 20:18:42,970 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 463 transitions, 6002 flow [2024-06-21 20:18:42,970 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 20:18:42,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:42,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:42,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:18:42,971 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 20:18:42,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:42,971 INFO L85 PathProgramCache]: Analyzing trace with hash -526785429, now seen corresponding path program 3 times [2024-06-21 20:18:42,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:42,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465065014] [2024-06-21 20:18:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:42,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:43,074 INFO 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 20:18:43,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:43,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465065014] [2024-06-21 20:18:43,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465065014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:43,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:43,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388775310] [2024-06-21 20:18:43,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:43,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:43,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:43,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:43,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 463 transitions, 6002 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 20:18:43,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:43,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:43,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:43,972 INFO L124 PetriNetUnfolderBase]: 3004/5118 cut-off events. [2024-06-21 20:18:43,972 INFO L125 PetriNetUnfolderBase]: For 412861/412867 co-relation queries the response was YES. [2024-06-21 20:18:44,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34668 conditions, 5118 events. 3004/5118 cut-off events. For 412861/412867 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34608 event pairs, 587 based on Foata normal form. 5/5119 useless extension candidates. Maximal degree in co-relation 34505. Up to 4374 conditions per place. [2024-06-21 20:18:44,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 129 changer transitions 0/498 dead transitions. [2024-06-21 20:18:44,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 498 transitions, 7644 flow [2024-06-21 20:18:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:18:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:18:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-21 20:18:44,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:18:44,042 INFO L175 Difference]: Start difference. First operand has 347 places, 463 transitions, 6002 flow. Second operand 10 states and 246 transitions. [2024-06-21 20:18:44,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 498 transitions, 7644 flow [2024-06-21 20:18:45,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 498 transitions, 7442 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:45,797 INFO L231 Difference]: Finished difference. Result has 352 places, 466 transitions, 6102 flow [2024-06-21 20:18:45,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6102, PETRI_PLACES=352, PETRI_TRANSITIONS=466} [2024-06-21 20:18:45,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 20:18:45,797 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 466 transitions, 6102 flow [2024-06-21 20:18:45,798 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 20:18:45,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:45,798 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 20:18:45,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:18:45,798 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 20:18:45,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:45,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1498415145, now seen corresponding path program 1 times [2024-06-21 20:18:45,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:45,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558116026] [2024-06-21 20:18:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:45,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:45,896 INFO 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 20:18:45,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:45,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558116026] [2024-06-21 20:18:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558116026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:45,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:45,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091027695] [2024-06-21 20:18:45,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:45,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:45,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:45,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:45,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 466 transitions, 6102 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 20:18:45,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:45,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:45,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:46,975 INFO L124 PetriNetUnfolderBase]: 3139/5338 cut-off events. [2024-06-21 20:18:46,975 INFO L125 PetriNetUnfolderBase]: For 531659/531665 co-relation queries the response was YES. [2024-06-21 20:18:47,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37341 conditions, 5338 events. 3139/5338 cut-off events. For 531659/531665 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36153 event pairs, 536 based on Foata normal form. 16/5349 useless extension candidates. Maximal degree in co-relation 37176. Up to 4297 conditions per place. [2024-06-21 20:18:47,038 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 138 changer transitions 0/511 dead transitions. [2024-06-21 20:18:47,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 511 transitions, 7886 flow [2024-06-21 20:18:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 20:18:47,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-21 20:18:47,039 INFO L175 Difference]: Start difference. First operand has 352 places, 466 transitions, 6102 flow. Second operand 8 states and 210 transitions. [2024-06-21 20:18:47,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 511 transitions, 7886 flow [2024-06-21 20:18:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 511 transitions, 7532 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 20:18:49,186 INFO L231 Difference]: Finished difference. Result has 352 places, 473 transitions, 6151 flow [2024-06-21 20:18:49,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6151, PETRI_PLACES=352, PETRI_TRANSITIONS=473} [2024-06-21 20:18:49,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 20:18:49,187 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 473 transitions, 6151 flow [2024-06-21 20:18:49,187 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 20:18:49,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:49,187 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 20:18:49,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:18:49,187 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 20:18:49,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1232391435, now seen corresponding path program 2 times [2024-06-21 20:18:49,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:49,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461134770] [2024-06-21 20:18:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:49,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:49,288 INFO 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 20:18:49,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:49,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461134770] [2024-06-21 20:18:49,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461134770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:49,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:49,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410088712] [2024-06-21 20:18:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:49,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:49,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 473 transitions, 6151 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 20:18:49,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:49,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:49,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:50,219 INFO L124 PetriNetUnfolderBase]: 3195/5434 cut-off events. [2024-06-21 20:18:50,219 INFO L125 PetriNetUnfolderBase]: For 561589/561595 co-relation queries the response was YES. [2024-06-21 20:18:50,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38216 conditions, 5434 events. 3195/5434 cut-off events. For 561589/561595 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37023 event pairs, 646 based on Foata normal form. 20/5449 useless extension candidates. Maximal degree in co-relation 38050. Up to 4607 conditions per place. [2024-06-21 20:18:50,295 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 130 changer transitions 0/505 dead transitions. [2024-06-21 20:18:50,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 505 transitions, 7655 flow [2024-06-21 20:18:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:18:50,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 20:18:50,296 INFO L175 Difference]: Start difference. First operand has 352 places, 473 transitions, 6151 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:18:50,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 505 transitions, 7655 flow [2024-06-21 20:18:52,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 505 transitions, 7449 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:52,766 INFO L231 Difference]: Finished difference. Result has 357 places, 475 transitions, 6265 flow [2024-06-21 20:18:52,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6265, PETRI_PLACES=357, PETRI_TRANSITIONS=475} [2024-06-21 20:18:52,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 20:18:52,767 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 475 transitions, 6265 flow [2024-06-21 20:18:52,767 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 20:18:52,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:52,767 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 20:18:52,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:18:52,767 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 20:18:52,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:52,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1232717865, now seen corresponding path program 3 times [2024-06-21 20:18:52,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:52,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875571442] [2024-06-21 20:18:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:52,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:52,875 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 20:18:52,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:52,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875571442] [2024-06-21 20:18:52,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875571442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:52,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:52,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:18:52,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512282408] [2024-06-21 20:18:52,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:52,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:18:52,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:18:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:18:52,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:52,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 475 transitions, 6265 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 20:18:52,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:52,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:53,882 INFO L124 PetriNetUnfolderBase]: 3251/5522 cut-off events. [2024-06-21 20:18:53,882 INFO L125 PetriNetUnfolderBase]: For 555641/555647 co-relation queries the response was YES. [2024-06-21 20:18:53,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 5522 events. 3251/5522 cut-off events. For 555641/555647 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 37639 event pairs, 642 based on Foata normal form. 16/5533 useless extension candidates. Maximal degree in co-relation 38812. Up to 4635 conditions per place. [2024-06-21 20:18:53,961 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 134 changer transitions 0/513 dead transitions. [2024-06-21 20:18:53,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 513 transitions, 7829 flow [2024-06-21 20:18:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:18:53,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 20:18:53,962 INFO L175 Difference]: Start difference. First operand has 357 places, 475 transitions, 6265 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:18:53,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 513 transitions, 7829 flow [2024-06-21 20:18:56,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 513 transitions, 7547 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:56,248 INFO L231 Difference]: Finished difference. Result has 360 places, 480 transitions, 6350 flow [2024-06-21 20:18:56,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6350, PETRI_PLACES=360, PETRI_TRANSITIONS=480} [2024-06-21 20:18:56,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 20:18:56,248 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 480 transitions, 6350 flow [2024-06-21 20:18:56,248 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 20:18:56,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:56,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:18:56,248 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 20:18:56,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash 805330791, now seen corresponding path program 4 times [2024-06-21 20:18:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506454351] [2024-06-21 20:18:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:56,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:56,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506454351] [2024-06-21 20:18:56,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506454351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:56,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:56,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:56,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058390200] [2024-06-21 20:18:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:56,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:56,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:56,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:56,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 480 transitions, 6350 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 20:18:56,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:56,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:56,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:57,298 INFO L124 PetriNetUnfolderBase]: 3264/5513 cut-off events. [2024-06-21 20:18:57,298 INFO L125 PetriNetUnfolderBase]: For 521872/521872 co-relation queries the response was YES. [2024-06-21 20:18:57,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39247 conditions, 5513 events. 3264/5513 cut-off events. For 521872/521872 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 37480 event pairs, 676 based on Foata normal form. 1/5500 useless extension candidates. Maximal degree in co-relation 39077. Up to 4716 conditions per place. [2024-06-21 20:18:57,376 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 123 changer transitions 0/509 dead transitions. [2024-06-21 20:18:57,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 509 transitions, 8058 flow [2024-06-21 20:18:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:18:57,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:18:57,377 INFO L175 Difference]: Start difference. First operand has 360 places, 480 transitions, 6350 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:18:57,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 509 transitions, 8058 flow [2024-06-21 20:18:59,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 509 transitions, 7763 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:59,855 INFO L231 Difference]: Finished difference. Result has 362 places, 486 transitions, 6387 flow [2024-06-21 20:18:59,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6055, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6387, PETRI_PLACES=362, PETRI_TRANSITIONS=486} [2024-06-21 20:18:59,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 20:18:59,856 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 486 transitions, 6387 flow [2024-06-21 20:18:59,856 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 20:18:59,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:59,856 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 20:18:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:18:59,856 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 20:18:59,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1576114813, now seen corresponding path program 5 times [2024-06-21 20:18:59,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:59,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586134622] [2024-06-21 20:18:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:59,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:59,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586134622] [2024-06-21 20:18:59,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586134622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:59,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:59,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300335976] [2024-06-21 20:18:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:59,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:18:59,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 486 transitions, 6387 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 20:18:59,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:59,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:18:59,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:00,893 INFO L124 PetriNetUnfolderBase]: 3277/5533 cut-off events. [2024-06-21 20:19:00,893 INFO L125 PetriNetUnfolderBase]: For 534975/534975 co-relation queries the response was YES. [2024-06-21 20:19:00,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39333 conditions, 5533 events. 3277/5533 cut-off events. For 534975/534975 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 37614 event pairs, 676 based on Foata normal form. 1/5520 useless extension candidates. Maximal degree in co-relation 39162. Up to 4731 conditions per place. [2024-06-21 20:19:00,973 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 128 changer transitions 0/512 dead transitions. [2024-06-21 20:19:00,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 512 transitions, 8111 flow [2024-06-21 20:19:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:19:00,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:19:00,974 INFO L175 Difference]: Start difference. First operand has 362 places, 486 transitions, 6387 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:19:00,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 512 transitions, 8111 flow [2024-06-21 20:19:03,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 512 transitions, 7833 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 20:19:03,148 INFO L231 Difference]: Finished difference. Result has 366 places, 492 transitions, 6463 flow [2024-06-21 20:19:03,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6145, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6463, PETRI_PLACES=366, PETRI_TRANSITIONS=492} [2024-06-21 20:19:03,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-21 20:19:03,149 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 492 transitions, 6463 flow [2024-06-21 20:19:03,149 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 20:19:03,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:03,149 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 20:19:03,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:19:03,149 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 20:19:03,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash -503378245, now seen corresponding path program 6 times [2024-06-21 20:19:03,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:03,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802572076] [2024-06-21 20:19:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:03,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:03,242 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 20:19:03,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:03,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802572076] [2024-06-21 20:19:03,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802572076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:03,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:03,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:03,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401918501] [2024-06-21 20:19:03,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:03,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:03,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:03,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:03,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 492 transitions, 6463 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 20:19:03,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:03,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:03,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:04,234 INFO L124 PetriNetUnfolderBase]: 3274/5529 cut-off events. [2024-06-21 20:19:04,234 INFO L125 PetriNetUnfolderBase]: For 540651/540651 co-relation queries the response was YES. [2024-06-21 20:19:04,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39268 conditions, 5529 events. 3274/5529 cut-off events. For 540651/540651 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 37616 event pairs, 676 based on Foata normal form. 1/5516 useless extension candidates. Maximal degree in co-relation 39096. Up to 4728 conditions per place. [2024-06-21 20:19:04,310 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 125 changer transitions 0/516 dead transitions. [2024-06-21 20:19:04,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 516 transitions, 8313 flow [2024-06-21 20:19:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:19:04,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 20:19:04,311 INFO L175 Difference]: Start difference. First operand has 366 places, 492 transitions, 6463 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:19:04,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 516 transitions, 8313 flow [2024-06-21 20:19:06,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 516 transitions, 8105 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:19:06,566 INFO L231 Difference]: Finished difference. Result has 370 places, 492 transitions, 6511 flow [2024-06-21 20:19:06,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6511, PETRI_PLACES=370, PETRI_TRANSITIONS=492} [2024-06-21 20:19:06,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 20:19:06,567 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 492 transitions, 6511 flow [2024-06-21 20:19:06,567 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 20:19:06,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:06,567 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 20:19:06,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:19:06,567 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 20:19:06,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1569334183, now seen corresponding path program 7 times [2024-06-21 20:19:06,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:06,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058655617] [2024-06-21 20:19:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:06,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:06,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058655617] [2024-06-21 20:19:06,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058655617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:06,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:06,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:06,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333261220] [2024-06-21 20:19:06,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:06,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:06,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:06,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:06,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 492 transitions, 6511 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 20:19:06,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:06,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:06,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:07,661 INFO L124 PetriNetUnfolderBase]: 3284/5555 cut-off events. [2024-06-21 20:19:07,662 INFO L125 PetriNetUnfolderBase]: For 551306/551306 co-relation queries the response was YES. [2024-06-21 20:19:07,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39517 conditions, 5555 events. 3284/5555 cut-off events. For 551306/551306 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37889 event pairs, 646 based on Foata normal form. 1/5545 useless extension candidates. Maximal degree in co-relation 39344. Up to 4939 conditions per place. [2024-06-21 20:19:07,741 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 441 selfloop transitions, 66 changer transitions 0/515 dead transitions. [2024-06-21 20:19:07,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 515 transitions, 7657 flow [2024-06-21 20:19:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:19:07,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:19:07,742 INFO L175 Difference]: Start difference. First operand has 370 places, 492 transitions, 6511 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:19:07,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 515 transitions, 7657 flow [2024-06-21 20:19:10,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 515 transitions, 7259 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:19:10,260 INFO L231 Difference]: Finished difference. Result has 370 places, 498 transitions, 6347 flow [2024-06-21 20:19:10,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6140, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6347, PETRI_PLACES=370, PETRI_TRANSITIONS=498} [2024-06-21 20:19:10,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 20:19:10,260 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 498 transitions, 6347 flow [2024-06-21 20:19:10,261 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 20:19:10,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:10,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:10,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:19:10,261 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 20:19:10,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1569334369, now seen corresponding path program 4 times [2024-06-21 20:19:10,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:10,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330452691] [2024-06-21 20:19:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:10,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:10,361 INFO 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 20:19:10,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330452691] [2024-06-21 20:19:10,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330452691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:10,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:10,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:10,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611258753] [2024-06-21 20:19:10,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:10,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:10,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:10,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:10,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 498 transitions, 6347 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 20:19:10,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:10,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:10,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:11,342 INFO L124 PetriNetUnfolderBase]: 3289/5562 cut-off events. [2024-06-21 20:19:11,342 INFO L125 PetriNetUnfolderBase]: For 559832/559832 co-relation queries the response was YES. [2024-06-21 20:19:11,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39418 conditions, 5562 events. 3289/5562 cut-off events. For 559832/559832 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37915 event pairs, 668 based on Foata normal form. 1/5552 useless extension candidates. Maximal degree in co-relation 39245. Up to 4808 conditions per place. [2024-06-21 20:19:11,423 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 380 selfloop transitions, 133 changer transitions 0/521 dead transitions. [2024-06-21 20:19:11,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 521 transitions, 8058 flow [2024-06-21 20:19:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:19:11,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:19:11,424 INFO L175 Difference]: Start difference. First operand has 370 places, 498 transitions, 6347 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:19:11,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 521 transitions, 8058 flow [2024-06-21 20:19:14,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 521 transitions, 7920 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:14,377 INFO L231 Difference]: Finished difference. Result has 373 places, 501 transitions, 6524 flow [2024-06-21 20:19:14,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6524, PETRI_PLACES=373, PETRI_TRANSITIONS=501} [2024-06-21 20:19:14,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-21 20:19:14,377 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 501 transitions, 6524 flow [2024-06-21 20:19:14,378 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 20:19:14,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:14,378 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 20:19:14,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:19:14,378 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 20:19:14,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1920538379, now seen corresponding path program 8 times [2024-06-21 20:19:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:14,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606894278] [2024-06-21 20:19:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:14,482 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 20:19:14,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606894278] [2024-06-21 20:19:14,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606894278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:14,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:14,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:14,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083259856] [2024-06-21 20:19:14,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:14,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:14,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:14,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:14,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:14,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 501 transitions, 6524 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 20:19:14,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:14,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:14,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:15,621 INFO L124 PetriNetUnfolderBase]: 3307/5595 cut-off events. [2024-06-21 20:19:15,622 INFO L125 PetriNetUnfolderBase]: For 575774/575774 co-relation queries the response was YES. [2024-06-21 20:19:15,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39951 conditions, 5595 events. 3307/5595 cut-off events. For 575774/575774 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38213 event pairs, 646 based on Foata normal form. 1/5585 useless extension candidates. Maximal degree in co-relation 39777. Up to 4954 conditions per place. [2024-06-21 20:19:15,706 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 80 changer transitions 0/525 dead transitions. [2024-06-21 20:19:15,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 525 transitions, 7890 flow [2024-06-21 20:19:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:19:15,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 20:19:15,708 INFO L175 Difference]: Start difference. First operand has 373 places, 501 transitions, 6524 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:19:15,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 525 transitions, 7890 flow [2024-06-21 20:19:18,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 525 transitions, 7554 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:18,225 INFO L231 Difference]: Finished difference. Result has 376 places, 510 transitions, 6479 flow [2024-06-21 20:19:18,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6479, PETRI_PLACES=376, PETRI_TRANSITIONS=510} [2024-06-21 20:19:18,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 20:19:18,226 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 510 transitions, 6479 flow [2024-06-21 20:19:18,226 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 20:19:18,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:18,226 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 20:19:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:19:18,226 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 20:19:18,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1920717125, now seen corresponding path program 5 times [2024-06-21 20:19:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421756639] [2024-06-21 20:19:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:18,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:18,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421756639] [2024-06-21 20:19:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421756639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:18,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:18,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286336975] [2024-06-21 20:19:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:18,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:18,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:18,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 510 transitions, 6479 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 20:19:18,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:18,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:18,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:19,338 INFO L124 PetriNetUnfolderBase]: 3320/5615 cut-off events. [2024-06-21 20:19:19,338 INFO L125 PetriNetUnfolderBase]: For 590738/590738 co-relation queries the response was YES. [2024-06-21 20:19:19,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 5615 events. 3320/5615 cut-off events. For 590738/590738 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38365 event pairs, 668 based on Foata normal form. 1/5605 useless extension candidates. Maximal degree in co-relation 39968. Up to 4845 conditions per place. [2024-06-21 20:19:19,421 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 387 selfloop transitions, 138 changer transitions 0/533 dead transitions. [2024-06-21 20:19:19,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 533 transitions, 8245 flow [2024-06-21 20:19:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:19:19,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 20:19:19,422 INFO L175 Difference]: Start difference. First operand has 376 places, 510 transitions, 6479 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:19:19,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 533 transitions, 8245 flow [2024-06-21 20:19:22,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 533 transitions, 8137 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 20:19:22,181 INFO L231 Difference]: Finished difference. Result has 381 places, 516 transitions, 6723 flow [2024-06-21 20:19:22,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6723, PETRI_PLACES=381, PETRI_TRANSITIONS=516} [2024-06-21 20:19:22,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-21 20:19:22,182 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 516 transitions, 6723 flow [2024-06-21 20:19:22,182 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 20:19:22,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:22,182 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 20:19:22,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:19:22,183 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 20:19:22,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:22,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1580376259, now seen corresponding path program 6 times [2024-06-21 20:19:22,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556874070] [2024-06-21 20:19:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:22,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:22,270 INFO 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 20:19:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556874070] [2024-06-21 20:19:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556874070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:22,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:22,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587957762] [2024-06-21 20:19:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:22,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:22,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 516 transitions, 6723 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 20:19:22,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:22,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:22,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:23,232 INFO L124 PetriNetUnfolderBase]: 3317/5611 cut-off events. [2024-06-21 20:19:23,233 INFO L125 PetriNetUnfolderBase]: For 597149/597149 co-relation queries the response was YES. [2024-06-21 20:19:23,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40314 conditions, 5611 events. 3317/5611 cut-off events. For 597149/597149 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38311 event pairs, 668 based on Foata normal form. 1/5601 useless extension candidates. Maximal degree in co-relation 40138. Up to 4842 conditions per place. [2024-06-21 20:19:23,312 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 388 selfloop transitions, 136 changer transitions 0/532 dead transitions. [2024-06-21 20:19:23,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 532 transitions, 8217 flow [2024-06-21 20:19:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:19:23,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 20:19:23,313 INFO L175 Difference]: Start difference. First operand has 381 places, 516 transitions, 6723 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:19:23,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 532 transitions, 8217 flow [2024-06-21 20:19:25,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 532 transitions, 7987 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:19:25,828 INFO L231 Difference]: Finished difference. Result has 385 places, 516 transitions, 6771 flow [2024-06-21 20:19:25,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6771, PETRI_PLACES=385, PETRI_TRANSITIONS=516} [2024-06-21 20:19:25,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-21 20:19:25,828 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 516 transitions, 6771 flow [2024-06-21 20:19:25,829 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 20:19:25,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:25,829 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 20:19:25,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:19:25,829 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 20:19:25,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:25,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1920330989, now seen corresponding path program 9 times [2024-06-21 20:19:25,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:25,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630981840] [2024-06-21 20:19:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:25,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:25,915 INFO 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 20:19:25,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:25,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630981840] [2024-06-21 20:19:25,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630981840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:25,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:25,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:25,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120148970] [2024-06-21 20:19:25,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:25,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:25,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 516 transitions, 6771 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 20:19:25,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:25,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:25,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:26,960 INFO L124 PetriNetUnfolderBase]: 3314/5609 cut-off events. [2024-06-21 20:19:26,960 INFO L125 PetriNetUnfolderBase]: For 603005/603005 co-relation queries the response was YES. [2024-06-21 20:19:27,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40320 conditions, 5609 events. 3314/5609 cut-off events. For 603005/603005 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38335 event pairs, 646 based on Foata normal form. 1/5599 useless extension candidates. Maximal degree in co-relation 40143. Up to 4965 conditions per place. [2024-06-21 20:19:27,046 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 443 selfloop transitions, 81 changer transitions 0/532 dead transitions. [2024-06-21 20:19:27,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 532 transitions, 7857 flow [2024-06-21 20:19:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 20:19:27,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-21 20:19:27,047 INFO L175 Difference]: Start difference. First operand has 385 places, 516 transitions, 6771 flow. Second operand 9 states and 206 transitions. [2024-06-21 20:19:27,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 532 transitions, 7857 flow [2024-06-21 20:19:29,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 532 transitions, 7576 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:29,801 INFO L231 Difference]: Finished difference. Result has 389 places, 516 transitions, 6658 flow [2024-06-21 20:19:29,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6658, PETRI_PLACES=389, PETRI_TRANSITIONS=516} [2024-06-21 20:19:29,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-21 20:19:29,801 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 516 transitions, 6658 flow [2024-06-21 20:19:29,801 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 20:19:29,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:29,801 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 20:19:29,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:19:29,801 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 20:19:29,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:29,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2064401467, now seen corresponding path program 10 times [2024-06-21 20:19:29,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:29,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133285383] [2024-06-21 20:19:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:29,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:29,895 INFO 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 20:19:29,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133285383] [2024-06-21 20:19:29,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133285383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:29,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:29,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:29,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140161145] [2024-06-21 20:19:29,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:29,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:29,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:29,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:29,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:29,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:29,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 516 transitions, 6658 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 20:19:29,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:29,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:29,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:30,922 INFO L124 PetriNetUnfolderBase]: 3319/5620 cut-off events. [2024-06-21 20:19:30,922 INFO L125 PetriNetUnfolderBase]: For 613396/613396 co-relation queries the response was YES. [2024-06-21 20:19:30,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40322 conditions, 5620 events. 3319/5620 cut-off events. For 613396/613396 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38467 event pairs, 646 based on Foata normal form. 1/5610 useless extension candidates. Maximal degree in co-relation 40144. Up to 4822 conditions per place. [2024-06-21 20:19:31,005 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 142 changer transitions 0/553 dead transitions. [2024-06-21 20:19:31,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 553 transitions, 8490 flow [2024-06-21 20:19:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-21 20:19:31,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:19:31,006 INFO L175 Difference]: Start difference. First operand has 389 places, 516 transitions, 6658 flow. Second operand 9 states and 228 transitions. [2024-06-21 20:19:31,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 553 transitions, 8490 flow [2024-06-21 20:19:33,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 553 transitions, 8286 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 20:19:33,686 INFO L231 Difference]: Finished difference. Result has 390 places, 519 transitions, 6836 flow [2024-06-21 20:19:33,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6454, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6836, PETRI_PLACES=390, PETRI_TRANSITIONS=519} [2024-06-21 20:19:33,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-21 20:19:33,686 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 519 transitions, 6836 flow [2024-06-21 20:19:33,687 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 20:19:33,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:33,687 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 20:19:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:19:33,687 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 20:19:33,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash 351795711, now seen corresponding path program 7 times [2024-06-21 20:19:33,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:33,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354284822] [2024-06-21 20:19:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:33,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:33,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:33,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354284822] [2024-06-21 20:19:33,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354284822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:33,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:33,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977869176] [2024-06-21 20:19:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:33,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:33,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:33,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:33,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 519 transitions, 6836 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 20:19:33,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:33,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:33,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:34,889 INFO L124 PetriNetUnfolderBase]: 3340/5651 cut-off events. [2024-06-21 20:19:34,889 INFO L125 PetriNetUnfolderBase]: For 636521/636521 co-relation queries the response was YES. [2024-06-21 20:19:34,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41123 conditions, 5651 events. 3340/5651 cut-off events. For 636521/636521 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 38694 event pairs, 668 based on Foata normal form. 1/5641 useless extension candidates. Maximal degree in co-relation 40943. Up to 4869 conditions per place. [2024-06-21 20:19:34,971 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 386 selfloop transitions, 150 changer transitions 0/544 dead transitions. [2024-06-21 20:19:34,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 544 transitions, 8690 flow [2024-06-21 20:19:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:19:34,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 20:19:34,972 INFO L175 Difference]: Start difference. First operand has 390 places, 519 transitions, 6836 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:19:34,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 544 transitions, 8690 flow [2024-06-21 20:19:37,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 544 transitions, 8346 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 20:19:37,974 INFO L231 Difference]: Finished difference. Result has 386 places, 528 transitions, 6934 flow [2024-06-21 20:19:37,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6934, PETRI_PLACES=386, PETRI_TRANSITIONS=528} [2024-06-21 20:19:37,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-21 20:19:37,975 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 528 transitions, 6934 flow [2024-06-21 20:19:37,975 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 20:19:37,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:37,975 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 20:19:37,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:19:37,975 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 20:19:37,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -673804249, now seen corresponding path program 8 times [2024-06-21 20:19:37,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:37,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997366787] [2024-06-21 20:19:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:37,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:38,055 INFO 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 20:19:38,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:38,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997366787] [2024-06-21 20:19:38,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997366787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:38,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:38,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:38,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753000716] [2024-06-21 20:19:38,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:38,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:38,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:38,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:38,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 528 transitions, 6934 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 20:19:38,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:38,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:38,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:39,104 INFO L124 PetriNetUnfolderBase]: 3337/5647 cut-off events. [2024-06-21 20:19:39,104 INFO L125 PetriNetUnfolderBase]: For 608704/608704 co-relation queries the response was YES. [2024-06-21 20:19:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40735 conditions, 5647 events. 3337/5647 cut-off events. For 608704/608704 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 38649 event pairs, 668 based on Foata normal form. 1/5637 useless extension candidates. Maximal degree in co-relation 40556. Up to 4866 conditions per place. [2024-06-21 20:19:39,192 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 388 selfloop transitions, 151 changer transitions 0/547 dead transitions. [2024-06-21 20:19:39,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 547 transitions, 8676 flow [2024-06-21 20:19:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:19:39,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 20:19:39,193 INFO L175 Difference]: Start difference. First operand has 386 places, 528 transitions, 6934 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:19:39,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 547 transitions, 8676 flow [2024-06-21 20:19:41,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 547 transitions, 8422 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:41,915 INFO L231 Difference]: Finished difference. Result has 388 places, 528 transitions, 7002 flow [2024-06-21 20:19:41,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6686, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7002, PETRI_PLACES=388, PETRI_TRANSITIONS=528} [2024-06-21 20:19:41,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-21 20:19:41,916 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 528 transitions, 7002 flow [2024-06-21 20:19:41,916 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 20:19:41,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:41,916 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 20:19:41,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:19:41,916 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 20:19:41,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 574935261, now seen corresponding path program 9 times [2024-06-21 20:19:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407777354] [2024-06-21 20:19:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:42,012 INFO 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 20:19:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407777354] [2024-06-21 20:19:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407777354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:42,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:42,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:19:42,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745491230] [2024-06-21 20:19:42,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:42,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:19:42,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:19:42,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:19:42,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:42,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 528 transitions, 7002 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 20:19:42,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:42,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:42,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:43,103 INFO L124 PetriNetUnfolderBase]: 3342/5677 cut-off events. [2024-06-21 20:19:43,103 INFO L125 PetriNetUnfolderBase]: For 609859/609865 co-relation queries the response was YES. [2024-06-21 20:19:43,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40828 conditions, 5677 events. 3342/5677 cut-off events. For 609859/609865 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38973 event pairs, 662 based on Foata normal form. 5/5677 useless extension candidates. Maximal degree in co-relation 40650. Up to 4872 conditions per place. [2024-06-21 20:19:43,191 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 148 changer transitions 0/551 dead transitions. [2024-06-21 20:19:43,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 551 transitions, 8595 flow [2024-06-21 20:19:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:19:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:19:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:19:43,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 20:19:43,192 INFO L175 Difference]: Start difference. First operand has 388 places, 528 transitions, 7002 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:19:43,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 551 transitions, 8595 flow [2024-06-21 20:19:46,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 551 transitions, 8305 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:46,242 INFO L231 Difference]: Finished difference. Result has 391 places, 531 transitions, 7069 flow [2024-06-21 20:19:46,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7069, PETRI_PLACES=391, PETRI_TRANSITIONS=531} [2024-06-21 20:19:46,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-21 20:19:46,242 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 531 transitions, 7069 flow [2024-06-21 20:19:46,243 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 20:19:46,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:46,243 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 20:19:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:19:46,243 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 20:19:46,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1388629455, now seen corresponding path program 10 times [2024-06-21 20:19:46,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:46,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273812647] [2024-06-21 20:19:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:46,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:46,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273812647] [2024-06-21 20:19:46,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273812647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:46,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:46,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:19:46,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502828641] [2024-06-21 20:19:46,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:46,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:19:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:46,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:19:46,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:19:46,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:46,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 531 transitions, 7069 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 20:19:46,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:46,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:46,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:47,451 INFO L124 PetriNetUnfolderBase]: 3355/5697 cut-off events. [2024-06-21 20:19:47,451 INFO L125 PetriNetUnfolderBase]: For 604370/604376 co-relation queries the response was YES. [2024-06-21 20:19:47,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40971 conditions, 5697 events. 3355/5697 cut-off events. For 604370/604376 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39073 event pairs, 660 based on Foata normal form. 5/5697 useless extension candidates. Maximal degree in co-relation 40794. Up to 4887 conditions per place. [2024-06-21 20:19:47,542 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 154 changer transitions 0/558 dead transitions. [2024-06-21 20:19:47,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 558 transitions, 8928 flow [2024-06-21 20:19:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:19:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:19:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:19:47,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 20:19:47,543 INFO L175 Difference]: Start difference. First operand has 391 places, 531 transitions, 7069 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:19:47,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 558 transitions, 8928 flow [2024-06-21 20:19:50,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 558 transitions, 8705 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:50,868 INFO L231 Difference]: Finished difference. Result has 394 places, 537 transitions, 7257 flow [2024-06-21 20:19:50,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6852, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7257, PETRI_PLACES=394, PETRI_TRANSITIONS=537} [2024-06-21 20:19:50,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-21 20:19:50,868 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 537 transitions, 7257 flow [2024-06-21 20:19:50,868 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 20:19:50,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:50,869 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 20:19:50,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:19:50,869 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 20:19:50,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1668214649, now seen corresponding path program 11 times [2024-06-21 20:19:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:50,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016332985] [2024-06-21 20:19:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:50,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:50,961 INFO 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 20:19:50,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:50,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016332985] [2024-06-21 20:19:50,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016332985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:50,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:50,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:50,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972071073] [2024-06-21 20:19:50,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:50,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:50,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:50,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 537 transitions, 7257 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 20:19:50,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:50,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:50,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:52,021 INFO L124 PetriNetUnfolderBase]: 3352/5672 cut-off events. [2024-06-21 20:19:52,021 INFO L125 PetriNetUnfolderBase]: For 610864/610864 co-relation queries the response was YES. [2024-06-21 20:19:52,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40960 conditions, 5672 events. 3352/5672 cut-off events. For 610864/610864 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38879 event pairs, 646 based on Foata normal form. 1/5662 useless extension candidates. Maximal degree in co-relation 40781. Up to 4869 conditions per place. [2024-06-21 20:19:52,111 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 416 selfloop transitions, 138 changer transitions 0/562 dead transitions. [2024-06-21 20:19:52,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 562 transitions, 8839 flow [2024-06-21 20:19:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:19:52,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 20:19:52,112 INFO L175 Difference]: Start difference. First operand has 394 places, 537 transitions, 7257 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:19:52,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 562 transitions, 8839 flow [2024-06-21 20:19:54,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 562 transitions, 8600 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:54,813 INFO L231 Difference]: Finished difference. Result has 397 places, 537 transitions, 7309 flow [2024-06-21 20:19:54,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7018, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7309, PETRI_PLACES=397, PETRI_TRANSITIONS=537} [2024-06-21 20:19:54,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 20:19:54,814 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 537 transitions, 7309 flow [2024-06-21 20:19:54,814 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 20:19:54,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:54,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:54,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:19:54,815 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 20:19:54,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:54,815 INFO L85 PathProgramCache]: Analyzing trace with hash 203799975, now seen corresponding path program 12 times [2024-06-21 20:19:54,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:54,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679537791] [2024-06-21 20:19:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:54,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:54,920 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 20:19:54,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:54,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679537791] [2024-06-21 20:19:54,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679537791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:54,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:54,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:19:54,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190033355] [2024-06-21 20:19:54,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:54,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:19:54,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:19:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:19:54,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:54,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 537 transitions, 7309 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 20:19:54,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:54,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:54,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:56,134 INFO L124 PetriNetUnfolderBase]: 3370/5722 cut-off events. [2024-06-21 20:19:56,135 INFO L125 PetriNetUnfolderBase]: For 629296/629302 co-relation queries the response was YES. [2024-06-21 20:19:56,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41377 conditions, 5722 events. 3370/5722 cut-off events. For 629296/629302 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39343 event pairs, 640 based on Foata normal form. 5/5722 useless extension candidates. Maximal degree in co-relation 41196. Up to 5044 conditions per place. [2024-06-21 20:19:56,213 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 481 selfloop transitions, 79 changer transitions 0/568 dead transitions. [2024-06-21 20:19:56,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 568 transitions, 9030 flow [2024-06-21 20:19:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:19:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:19:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 20:19:56,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 20:19:56,214 INFO L175 Difference]: Start difference. First operand has 397 places, 537 transitions, 7309 flow. Second operand 10 states and 230 transitions. [2024-06-21 20:19:56,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 568 transitions, 9030 flow [2024-06-21 20:19:59,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 568 transitions, 8720 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:19:59,271 INFO L231 Difference]: Finished difference. Result has 401 places, 546 transitions, 7321 flow [2024-06-21 20:19:59,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7321, PETRI_PLACES=401, PETRI_TRANSITIONS=546} [2024-06-21 20:19:59,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-21 20:19:59,271 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 546 transitions, 7321 flow [2024-06-21 20:19:59,271 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 20:19:59,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:59,271 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 20:19:59,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:19:59,272 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 20:19:59,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2043762269, now seen corresponding path program 11 times [2024-06-21 20:19:59,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:59,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677464133] [2024-06-21 20:19:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:59,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:59,363 INFO 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 20:19:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677464133] [2024-06-21 20:19:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677464133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:59,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:59,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:19:59,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109616853] [2024-06-21 20:19:59,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:59,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:19:59,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:19:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:19:59,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:19:59,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 546 transitions, 7321 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 20:19:59,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:59,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:19:59,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:00,479 INFO L124 PetriNetUnfolderBase]: 3375/5731 cut-off events. [2024-06-21 20:20:00,479 INFO L125 PetriNetUnfolderBase]: For 617726/617732 co-relation queries the response was YES. [2024-06-21 20:20:00,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41127 conditions, 5731 events. 3375/5731 cut-off events. For 617726/617732 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39410 event pairs, 663 based on Foata normal form. 5/5731 useless extension candidates. Maximal degree in co-relation 40945. Up to 4911 conditions per place. [2024-06-21 20:20:00,562 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 158 changer transitions 0/570 dead transitions. [2024-06-21 20:20:00,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 570 transitions, 9146 flow [2024-06-21 20:20:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:20:00,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 20:20:00,563 INFO L175 Difference]: Start difference. First operand has 401 places, 546 transitions, 7321 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:20:00,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 570 transitions, 9146 flow [2024-06-21 20:20:03,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 570 transitions, 9008 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:03,607 INFO L231 Difference]: Finished difference. Result has 404 places, 549 transitions, 7538 flow [2024-06-21 20:20:03,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7183, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7538, PETRI_PLACES=404, PETRI_TRANSITIONS=549} [2024-06-21 20:20:03,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-21 20:20:03,608 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 549 transitions, 7538 flow [2024-06-21 20:20:03,608 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 20:20:03,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:03,608 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 20:20:03,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:20:03,608 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 20:20:03,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1010691807, now seen corresponding path program 12 times [2024-06-21 20:20:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:03,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180006394] [2024-06-21 20:20:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:03,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:03,705 INFO 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 20:20:03,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:03,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180006394] [2024-06-21 20:20:03,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180006394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:03,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:03,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:03,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911371942] [2024-06-21 20:20:03,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:03,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:03,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:03,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:03,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:03,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:03,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 549 transitions, 7538 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 20:20:03,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:03,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:03,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:04,792 INFO L124 PetriNetUnfolderBase]: 3372/5727 cut-off events. [2024-06-21 20:20:04,792 INFO L125 PetriNetUnfolderBase]: For 625896/625902 co-relation queries the response was YES. [2024-06-21 20:20:04,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41290 conditions, 5727 events. 3372/5727 cut-off events. For 625896/625902 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39371 event pairs, 666 based on Foata normal form. 5/5727 useless extension candidates. Maximal degree in co-relation 41107. Up to 4908 conditions per place. [2024-06-21 20:20:04,874 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 158 changer transitions 0/569 dead transitions. [2024-06-21 20:20:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 569 transitions, 9124 flow [2024-06-21 20:20:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:20:04,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 20:20:04,875 INFO L175 Difference]: Start difference. First operand has 404 places, 549 transitions, 7538 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:20:04,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 569 transitions, 9124 flow [2024-06-21 20:20:08,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 569 transitions, 8908 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:20:08,041 INFO L231 Difference]: Finished difference. Result has 408 places, 549 transitions, 7644 flow [2024-06-21 20:20:08,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7644, PETRI_PLACES=408, PETRI_TRANSITIONS=549} [2024-06-21 20:20:08,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-21 20:20:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 549 transitions, 7644 flow [2024-06-21 20:20:08,042 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 20:20:08,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:08,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:08,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:20:08,042 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 20:20:08,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1895201537, now seen corresponding path program 4 times [2024-06-21 20:20:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145077536] [2024-06-21 20:20:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:08,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:08,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145077536] [2024-06-21 20:20:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145077536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:08,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:08,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:08,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465727693] [2024-06-21 20:20:08,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:08,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:08,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:08,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:08,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 549 transitions, 7644 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 20:20:08,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:08,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:08,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:09,239 INFO L124 PetriNetUnfolderBase]: 3428/5815 cut-off events. [2024-06-21 20:20:09,239 INFO L125 PetriNetUnfolderBase]: For 724697/724703 co-relation queries the response was YES. [2024-06-21 20:20:09,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42074 conditions, 5815 events. 3428/5815 cut-off events. For 724697/724703 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 40024 event pairs, 675 based on Foata normal form. 20/5830 useless extension candidates. Maximal degree in co-relation 41889. Up to 4932 conditions per place. [2024-06-21 20:20:09,324 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 161 changer transitions 0/575 dead transitions. [2024-06-21 20:20:09,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 575 transitions, 9324 flow [2024-06-21 20:20:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:20:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 20:20:09,325 INFO L175 Difference]: Start difference. First operand has 408 places, 549 transitions, 7644 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:20:09,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 575 transitions, 9324 flow [2024-06-21 20:20:12,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 575 transitions, 8878 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 20:20:12,932 INFO L231 Difference]: Finished difference. Result has 407 places, 551 transitions, 7584 flow [2024-06-21 20:20:12,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7198, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7584, PETRI_PLACES=407, PETRI_TRANSITIONS=551} [2024-06-21 20:20:12,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 20:20:12,933 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 551 transitions, 7584 flow [2024-06-21 20:20:12,933 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 20:20:12,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:12,933 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 20:20:12,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:20:12,934 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 20:20:12,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash -929135927, now seen corresponding path program 5 times [2024-06-21 20:20:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:12,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543543755] [2024-06-21 20:20:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:12,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:13,049 INFO 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 20:20:13,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:13,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543543755] [2024-06-21 20:20:13,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543543755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:13,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:13,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:13,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411643168] [2024-06-21 20:20:13,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:13,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:13,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:13,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:13,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 551 transitions, 7584 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 20:20:13,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:13,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:13,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:14,174 INFO L124 PetriNetUnfolderBase]: 3484/5911 cut-off events. [2024-06-21 20:20:14,174 INFO L125 PetriNetUnfolderBase]: For 737785/737791 co-relation queries the response was YES. [2024-06-21 20:20:14,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42928 conditions, 5911 events. 3484/5911 cut-off events. For 737785/737791 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 40818 event pairs, 687 based on Foata normal form. 20/5926 useless extension candidates. Maximal degree in co-relation 42743. Up to 5020 conditions per place. [2024-06-21 20:20:14,262 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 160 changer transitions 0/577 dead transitions. [2024-06-21 20:20:14,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 577 transitions, 9276 flow [2024-06-21 20:20:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:20:14,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 20:20:14,263 INFO L175 Difference]: Start difference. First operand has 407 places, 551 transitions, 7584 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:20:14,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 577 transitions, 9276 flow [2024-06-21 20:20:17,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 577 transitions, 8924 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:20:17,430 INFO L231 Difference]: Finished difference. Result has 409 places, 553 transitions, 7620 flow [2024-06-21 20:20:17,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7232, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7620, PETRI_PLACES=409, PETRI_TRANSITIONS=553} [2024-06-21 20:20:17,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 20:20:17,431 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 553 transitions, 7620 flow [2024-06-21 20:20:17,431 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 20:20:17,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:17,431 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 20:20:17,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:20:17,431 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 20:20:17,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1523977157, now seen corresponding path program 6 times [2024-06-21 20:20:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:17,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538116400] [2024-06-21 20:20:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:17,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:17,545 INFO 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 20:20:17,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:17,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538116400] [2024-06-21 20:20:17,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538116400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:17,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:17,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659148168] [2024-06-21 20:20:17,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:17,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:17,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:17,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:17,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 553 transitions, 7620 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 20:20:17,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:17,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:17,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:18,768 INFO L124 PetriNetUnfolderBase]: 3540/5999 cut-off events. [2024-06-21 20:20:18,769 INFO L125 PetriNetUnfolderBase]: For 729304/729310 co-relation queries the response was YES. [2024-06-21 20:20:18,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43475 conditions, 5999 events. 3540/5999 cut-off events. For 729304/729310 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 41444 event pairs, 683 based on Foata normal form. 16/6010 useless extension candidates. Maximal degree in co-relation 43289. Up to 4984 conditions per place. [2024-06-21 20:20:18,853 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 411 selfloop transitions, 166 changer transitions 0/585 dead transitions. [2024-06-21 20:20:18,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 585 transitions, 9382 flow [2024-06-21 20:20:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:20:18,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 20:20:18,854 INFO L175 Difference]: Start difference. First operand has 409 places, 553 transitions, 7620 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:20:18,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 585 transitions, 9382 flow [2024-06-21 20:20:22,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 585 transitions, 9028 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:20:22,083 INFO L231 Difference]: Finished difference. Result has 412 places, 558 transitions, 7719 flow [2024-06-21 20:20:22,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7719, PETRI_PLACES=412, PETRI_TRANSITIONS=558} [2024-06-21 20:20:22,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-21 20:20:22,083 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 558 transitions, 7719 flow [2024-06-21 20:20:22,083 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 20:20:22,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:22,084 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 20:20:22,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:20:22,084 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 20:20:22,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1908545921, now seen corresponding path program 1 times [2024-06-21 20:20:22,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:22,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910615181] [2024-06-21 20:20:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:22,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:22,184 INFO 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 20:20:22,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:22,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910615181] [2024-06-21 20:20:22,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910615181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:22,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464154129] [2024-06-21 20:20:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:22,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:22,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 558 transitions, 7719 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 20:20:22,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:22,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:22,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:23,387 INFO L124 PetriNetUnfolderBase]: 3580/6071 cut-off events. [2024-06-21 20:20:23,387 INFO L125 PetriNetUnfolderBase]: For 742457/742463 co-relation queries the response was YES. [2024-06-21 20:20:23,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43967 conditions, 6071 events. 3580/6071 cut-off events. For 742457/742463 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 42084 event pairs, 695 based on Foata normal form. 16/6082 useless extension candidates. Maximal degree in co-relation 43779. Up to 4984 conditions per place. [2024-06-21 20:20:23,480 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 410 selfloop transitions, 169 changer transitions 0/587 dead transitions. [2024-06-21 20:20:23,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 587 transitions, 9445 flow [2024-06-21 20:20:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:20:23,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:20:23,481 INFO L175 Difference]: Start difference. First operand has 412 places, 558 transitions, 7719 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:20:23,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 587 transitions, 9445 flow [2024-06-21 20:20:26,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 587 transitions, 9072 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:26,920 INFO L231 Difference]: Finished difference. Result has 415 places, 560 transitions, 7743 flow [2024-06-21 20:20:26,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7346, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7743, PETRI_PLACES=415, PETRI_TRANSITIONS=560} [2024-06-21 20:20:26,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-21 20:20:26,920 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 560 transitions, 7743 flow [2024-06-21 20:20:26,920 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 20:20:26,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:26,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:26,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:20:26,921 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 20:20:26,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1126017315, now seen corresponding path program 1 times [2024-06-21 20:20:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:26,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981609139] [2024-06-21 20:20:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:27,038 INFO 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 20:20:27,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:27,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981609139] [2024-06-21 20:20:27,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981609139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:27,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:27,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:27,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373458218] [2024-06-21 20:20:27,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:27,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:27,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:27,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 560 transitions, 7743 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 20:20:27,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:27,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:27,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:28,354 INFO L124 PetriNetUnfolderBase]: 3588/6080 cut-off events. [2024-06-21 20:20:28,354 INFO L125 PetriNetUnfolderBase]: For 694334/694340 co-relation queries the response was YES. [2024-06-21 20:20:28,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44059 conditions, 6080 events. 3588/6080 cut-off events. For 694334/694340 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42109 event pairs, 672 based on Foata normal form. 6/6082 useless extension candidates. Maximal degree in co-relation 43870. Up to 5427 conditions per place. [2024-06-21 20:20:28,446 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 506 selfloop transitions, 67 changer transitions 0/581 dead transitions. [2024-06-21 20:20:28,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 581 transitions, 9001 flow [2024-06-21 20:20:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:20:28,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 20:20:28,447 INFO L175 Difference]: Start difference. First operand has 415 places, 560 transitions, 7743 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:20:28,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 581 transitions, 9001 flow [2024-06-21 20:20:32,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 581 transitions, 8626 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:20:32,283 INFO L231 Difference]: Finished difference. Result has 417 places, 562 transitions, 7577 flow [2024-06-21 20:20:32,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7577, PETRI_PLACES=417, PETRI_TRANSITIONS=562} [2024-06-21 20:20:32,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-21 20:20:32,284 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 562 transitions, 7577 flow [2024-06-21 20:20:32,284 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 20:20:32,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:32,284 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 20:20:32,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:20:32,284 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 20:20:32,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1908550881, now seen corresponding path program 2 times [2024-06-21 20:20:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48510961] [2024-06-21 20:20:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:32,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:32,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:32,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48510961] [2024-06-21 20:20:32,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48510961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:32,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:32,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782732413] [2024-06-21 20:20:32,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:32,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:32,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:32,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:32,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 562 transitions, 7577 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 20:20:32,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:32,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:32,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:33,747 INFO L124 PetriNetUnfolderBase]: 3596/6088 cut-off events. [2024-06-21 20:20:33,748 INFO L125 PetriNetUnfolderBase]: For 704523/704529 co-relation queries the response was YES. [2024-06-21 20:20:33,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43787 conditions, 6088 events. 3596/6088 cut-off events. For 704523/704529 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42093 event pairs, 666 based on Foata normal form. 6/6090 useless extension candidates. Maximal degree in co-relation 43597. Up to 5419 conditions per place. [2024-06-21 20:20:33,844 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 505 selfloop transitions, 72 changer transitions 0/585 dead transitions. [2024-06-21 20:20:33,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 585 transitions, 8851 flow [2024-06-21 20:20:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:20:33,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 20:20:33,845 INFO L175 Difference]: Start difference. First operand has 417 places, 562 transitions, 7577 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:20:33,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 585 transitions, 8851 flow [2024-06-21 20:20:37,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 585 transitions, 8658 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:20:37,164 INFO L231 Difference]: Finished difference. Result has 420 places, 564 transitions, 7607 flow [2024-06-21 20:20:37,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7384, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7607, PETRI_PLACES=420, PETRI_TRANSITIONS=564} [2024-06-21 20:20:37,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-21 20:20:37,164 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 564 transitions, 7607 flow [2024-06-21 20:20:37,164 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 20:20:37,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:37,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:37,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:20:37,165 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 20:20:37,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:37,165 INFO L85 PathProgramCache]: Analyzing trace with hash -6172215, now seen corresponding path program 13 times [2024-06-21 20:20:37,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:37,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230241576] [2024-06-21 20:20:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:37,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:37,249 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 20:20:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230241576] [2024-06-21 20:20:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230241576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:37,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:37,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911078064] [2024-06-21 20:20:37,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:37,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:37,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:37,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:37,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 564 transitions, 7607 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 20:20:37,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:37,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:37,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:38,398 INFO L124 PetriNetUnfolderBase]: 3617/6126 cut-off events. [2024-06-21 20:20:38,398 INFO L125 PetriNetUnfolderBase]: For 724180/724186 co-relation queries the response was YES. [2024-06-21 20:20:38,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44274 conditions, 6126 events. 3617/6126 cut-off events. For 724180/724186 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42444 event pairs, 721 based on Foata normal form. 1/6120 useless extension candidates. Maximal degree in co-relation 44083. Up to 5226 conditions per place. [2024-06-21 20:20:38,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 165 changer transitions 0/602 dead transitions. [2024-06-21 20:20:38,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 602 transitions, 9639 flow [2024-06-21 20:20:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:20:38,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-21 20:20:38,492 INFO L175 Difference]: Start difference. First operand has 420 places, 564 transitions, 7607 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:20:38,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 602 transitions, 9639 flow [2024-06-21 20:20:42,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 602 transitions, 9432 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:20:42,254 INFO L231 Difference]: Finished difference. Result has 420 places, 573 transitions, 7842 flow [2024-06-21 20:20:42,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7400, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7842, PETRI_PLACES=420, PETRI_TRANSITIONS=573} [2024-06-21 20:20:42,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-21 20:20:42,254 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 573 transitions, 7842 flow [2024-06-21 20:20:42,254 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 20:20:42,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:42,254 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 20:20:42,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:20:42,255 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 20:20:42,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash -6052245, now seen corresponding path program 14 times [2024-06-21 20:20:42,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:42,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646337035] [2024-06-21 20:20:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:42,350 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 20:20:42,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:42,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646337035] [2024-06-21 20:20:42,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646337035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:42,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:42,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:42,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358405841] [2024-06-21 20:20:42,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:42,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:42,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:42,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:42,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:42,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:42,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 573 transitions, 7842 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 20:20:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:43,550 INFO L124 PetriNetUnfolderBase]: 3614/6124 cut-off events. [2024-06-21 20:20:43,550 INFO L125 PetriNetUnfolderBase]: For 730094/730100 co-relation queries the response was YES. [2024-06-21 20:20:43,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44386 conditions, 6124 events. 3614/6124 cut-off events. For 730094/730100 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 42479 event pairs, 681 based on Foata normal form. 5/6124 useless extension candidates. Maximal degree in co-relation 44194. Up to 5437 conditions per place. [2024-06-21 20:20:43,643 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 72 changer transitions 0/596 dead transitions. [2024-06-21 20:20:43,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 596 transitions, 9076 flow [2024-06-21 20:20:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:20:43,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:20:43,644 INFO L175 Difference]: Start difference. First operand has 420 places, 573 transitions, 7842 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:20:43,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 596 transitions, 9076 flow [2024-06-21 20:20:47,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 596 transitions, 8712 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:20:47,869 INFO L231 Difference]: Finished difference. Result has 423 places, 573 transitions, 7628 flow [2024-06-21 20:20:47,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7478, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7628, PETRI_PLACES=423, PETRI_TRANSITIONS=573} [2024-06-21 20:20:47,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 20:20:47,870 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 573 transitions, 7628 flow [2024-06-21 20:20:47,870 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 20:20:47,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:47,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:20:47,870 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 20:20:47,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1515689447, now seen corresponding path program 15 times [2024-06-21 20:20:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378942189] [2024-06-21 20:20:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:47,969 INFO 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 20:20:47,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378942189] [2024-06-21 20:20:47,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378942189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:47,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:47,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:47,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670531576] [2024-06-21 20:20:47,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:47,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:47,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:48,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:48,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 573 transitions, 7628 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 20:20:48,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:48,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:48,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:49,154 INFO L124 PetriNetUnfolderBase]: 3635/6145 cut-off events. [2024-06-21 20:20:49,155 INFO L125 PetriNetUnfolderBase]: For 756048/756054 co-relation queries the response was YES. [2024-06-21 20:20:49,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44596 conditions, 6145 events. 3635/6145 cut-off events. For 756048/756054 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 42611 event pairs, 714 based on Foata normal form. 5/6139 useless extension candidates. Maximal degree in co-relation 44403. Up to 5247 conditions per place. [2024-06-21 20:20:49,252 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 426 selfloop transitions, 170 changer transitions 0/604 dead transitions. [2024-06-21 20:20:49,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 604 transitions, 9426 flow [2024-06-21 20:20:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:20:49,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:20:49,253 INFO L175 Difference]: Start difference. First operand has 423 places, 573 transitions, 7628 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:20:49,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 604 transitions, 9426 flow [2024-06-21 20:20:53,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 604 transitions, 9270 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:20:53,859 INFO L231 Difference]: Finished difference. Result has 423 places, 582 transitions, 7918 flow [2024-06-21 20:20:53,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7472, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7918, PETRI_PLACES=423, PETRI_TRANSITIONS=582} [2024-06-21 20:20:53,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 20:20:53,860 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 582 transitions, 7918 flow [2024-06-21 20:20:53,860 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 20:20:53,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:53,860 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 20:20:53,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:20:53,860 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 20:20:53,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1515333257, now seen corresponding path program 16 times [2024-06-21 20:20:53,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:53,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648981236] [2024-06-21 20:20:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:53,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:53,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648981236] [2024-06-21 20:20:53,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648981236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:53,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:53,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128287104] [2024-06-21 20:20:53,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:53,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:53,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:53,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 582 transitions, 7918 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 20:20:53,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:53,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:53,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:55,140 INFO L124 PetriNetUnfolderBase]: 3640/6154 cut-off events. [2024-06-21 20:20:55,141 INFO L125 PetriNetUnfolderBase]: For 768781/768787 co-relation queries the response was YES. [2024-06-21 20:20:55,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45012 conditions, 6154 events. 3640/6154 cut-off events. For 768781/768787 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 42733 event pairs, 716 based on Foata normal form. 5/6148 useless extension candidates. Maximal degree in co-relation 44818. Up to 5253 conditions per place. [2024-06-21 20:20:55,234 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 426 selfloop transitions, 170 changer transitions 0/604 dead transitions. [2024-06-21 20:20:55,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 604 transitions, 9652 flow [2024-06-21 20:20:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:20:55,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 20:20:55,235 INFO L175 Difference]: Start difference. First operand has 423 places, 582 transitions, 7918 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:20:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 604 transitions, 9652 flow [2024-06-21 20:20:59,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 604 transitions, 9388 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:20:59,595 INFO L231 Difference]: Finished difference. Result has 427 places, 585 transitions, 8040 flow [2024-06-21 20:20:59,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8040, PETRI_PLACES=427, PETRI_TRANSITIONS=585} [2024-06-21 20:20:59,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-21 20:20:59,596 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 585 transitions, 8040 flow [2024-06-21 20:20:59,596 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 20:20:59,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:59,596 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 20:20:59,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:20:59,597 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 20:20:59,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash 899891205, now seen corresponding path program 17 times [2024-06-21 20:20:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:59,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737363595] [2024-06-21 20:20:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:59,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:59,697 INFO 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 20:20:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:59,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737363595] [2024-06-21 20:20:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737363595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:59,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:59,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927733131] [2024-06-21 20:20:59,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:59,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:59,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:59,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:59,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:59,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:20:59,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 585 transitions, 8040 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 20:20:59,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:59,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:20:59,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:01,120 INFO L124 PetriNetUnfolderBase]: 3637/6150 cut-off events. [2024-06-21 20:21:01,121 INFO L125 PetriNetUnfolderBase]: For 775530/775536 co-relation queries the response was YES. [2024-06-21 20:21:01,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45001 conditions, 6150 events. 3637/6150 cut-off events. For 775530/775536 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 42655 event pairs, 716 based on Foata normal form. 5/6144 useless extension candidates. Maximal degree in co-relation 44806. Up to 5250 conditions per place. [2024-06-21 20:21:01,207 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 174 changer transitions 0/601 dead transitions. [2024-06-21 20:21:01,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 601 transitions, 9724 flow [2024-06-21 20:21:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:21:01,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 20:21:01,208 INFO L175 Difference]: Start difference. First operand has 427 places, 585 transitions, 8040 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:21:01,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 601 transitions, 9724 flow [2024-06-21 20:21:05,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 601 transitions, 9395 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:21:05,703 INFO L231 Difference]: Finished difference. Result has 430 places, 585 transitions, 8065 flow [2024-06-21 20:21:05,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7711, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8065, PETRI_PLACES=430, PETRI_TRANSITIONS=585} [2024-06-21 20:21:05,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-21 20:21:05,704 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 585 transitions, 8065 flow [2024-06-21 20:21:05,704 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 20:21:05,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:05,704 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 20:21:05,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:21:05,704 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 20:21:05,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:05,704 INFO L85 PathProgramCache]: Analyzing trace with hash -329455613, now seen corresponding path program 18 times [2024-06-21 20:21:05,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:05,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493301755] [2024-06-21 20:21:05,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:05,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:05,781 INFO 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 20:21:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493301755] [2024-06-21 20:21:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493301755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:05,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:05,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:05,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135466997] [2024-06-21 20:21:05,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:05,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:05,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:05,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:05,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:05,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 585 transitions, 8065 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 20:21:05,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:05,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:05,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:06,974 INFO L124 PetriNetUnfolderBase]: 3642/6169 cut-off events. [2024-06-21 20:21:06,974 INFO L125 PetriNetUnfolderBase]: For 786956/786962 co-relation queries the response was YES. [2024-06-21 20:21:07,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45174 conditions, 6169 events. 3642/6169 cut-off events. For 786956/786962 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42843 event pairs, 723 based on Foata normal form. 1/6163 useless extension candidates. Maximal degree in co-relation 44978. Up to 5256 conditions per place. [2024-06-21 20:21:07,069 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 175 changer transitions 0/615 dead transitions. [2024-06-21 20:21:07,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 615 transitions, 10308 flow [2024-06-21 20:21:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:21:07,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:21:07,070 INFO L175 Difference]: Start difference. First operand has 430 places, 585 transitions, 8065 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:21:07,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 615 transitions, 10308 flow [2024-06-21 20:21:11,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 615 transitions, 9915 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:11,404 INFO L231 Difference]: Finished difference. Result has 432 places, 588 transitions, 8063 flow [2024-06-21 20:21:11,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8063, PETRI_PLACES=432, PETRI_TRANSITIONS=588} [2024-06-21 20:21:11,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 20:21:11,405 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 588 transitions, 8063 flow [2024-06-21 20:21:11,405 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 20:21:11,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:11,405 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 20:21:11,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:21:11,405 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 20:21:11,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash 203605095, now seen corresponding path program 19 times [2024-06-21 20:21:11,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:11,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822296289] [2024-06-21 20:21:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:11,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:11,486 INFO 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 20:21:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822296289] [2024-06-21 20:21:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822296289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:11,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:11,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388615226] [2024-06-21 20:21:11,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:11,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:11,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:11,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 588 transitions, 8063 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 20:21:11,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:11,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:11,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:12,702 INFO L124 PetriNetUnfolderBase]: 3639/6165 cut-off events. [2024-06-21 20:21:12,702 INFO L125 PetriNetUnfolderBase]: For 792461/792467 co-relation queries the response was YES. [2024-06-21 20:21:12,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45014 conditions, 6165 events. 3639/6165 cut-off events. For 792461/792467 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42809 event pairs, 723 based on Foata normal form. 1/6159 useless extension candidates. Maximal degree in co-relation 44818. Up to 5253 conditions per place. [2024-06-21 20:21:12,795 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 173 changer transitions 0/611 dead transitions. [2024-06-21 20:21:12,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 611 transitions, 10027 flow [2024-06-21 20:21:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:21:12,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:21:12,796 INFO L175 Difference]: Start difference. First operand has 432 places, 588 transitions, 8063 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:21:12,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 611 transitions, 10027 flow [2024-06-21 20:21:17,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 611 transitions, 9517 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:21:17,713 INFO L231 Difference]: Finished difference. Result has 433 places, 588 transitions, 7905 flow [2024-06-21 20:21:17,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7553, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7905, PETRI_PLACES=433, PETRI_TRANSITIONS=588} [2024-06-21 20:21:17,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-21 20:21:17,714 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 588 transitions, 7905 flow [2024-06-21 20:21:17,714 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 20:21:17,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:17,714 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 20:21:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:21:17,714 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 20:21:17,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash -930164785, now seen corresponding path program 20 times [2024-06-21 20:21:17,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:17,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95060594] [2024-06-21 20:21:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:17,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:17,800 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 20:21:17,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:17,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95060594] [2024-06-21 20:21:17,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95060594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:17,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:17,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773083217] [2024-06-21 20:21:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:17,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:17,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 588 transitions, 7905 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 20:21:17,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:17,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:19,050 INFO L124 PetriNetUnfolderBase]: 3636/6163 cut-off events. [2024-06-21 20:21:19,050 INFO L125 PetriNetUnfolderBase]: For 796795/796801 co-relation queries the response was YES. [2024-06-21 20:21:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44878 conditions, 6163 events. 3636/6163 cut-off events. For 796795/796801 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42829 event pairs, 683 based on Foata normal form. 5/6163 useless extension candidates. Maximal degree in co-relation 44681. Up to 5458 conditions per place. [2024-06-21 20:21:19,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 79 changer transitions 0/608 dead transitions. [2024-06-21 20:21:19,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 608 transitions, 9389 flow [2024-06-21 20:21:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 20:21:19,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-21 20:21:19,146 INFO L175 Difference]: Start difference. First operand has 433 places, 588 transitions, 7905 flow. Second operand 9 states and 210 transitions. [2024-06-21 20:21:19,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 608 transitions, 9389 flow [2024-06-21 20:21:23,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 608 transitions, 9041 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:23,852 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7721 flow [2024-06-21 20:21:23,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7721, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-21 20:21:23,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:21:23,853 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7721 flow [2024-06-21 20:21:23,853 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 20:21:23,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:23,853 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 20:21:23,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:21:23,853 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 20:21:23,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash 318896265, now seen corresponding path program 21 times [2024-06-21 20:21:23,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:23,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211650523] [2024-06-21 20:21:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:23,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:23,938 INFO 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 20:21:23,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:23,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211650523] [2024-06-21 20:21:23,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211650523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:23,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:23,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551592723] [2024-06-21 20:21:23,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:23,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:23,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:23,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7721 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 20:21:23,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:23,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:23,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:25,195 INFO L124 PetriNetUnfolderBase]: 3633/6159 cut-off events. [2024-06-21 20:21:25,195 INFO L125 PetriNetUnfolderBase]: For 802303/802309 co-relation queries the response was YES. [2024-06-21 20:21:25,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44616 conditions, 6159 events. 3633/6159 cut-off events. For 802303/802309 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42816 event pairs, 681 based on Foata normal form. 5/6159 useless extension candidates. Maximal degree in co-relation 44418. Up to 5455 conditions per place. [2024-06-21 20:21:25,299 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 519 selfloop transitions, 78 changer transitions 0/605 dead transitions. [2024-06-21 20:21:25,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 605 transitions, 8957 flow [2024-06-21 20:21:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:21:25,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 20:21:25,300 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7721 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:21:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 605 transitions, 8957 flow [2024-06-21 20:21:30,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 605 transitions, 8791 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:30,420 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7717 flow [2024-06-21 20:21:30,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7717, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-21 20:21:30,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:21:30,421 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7717 flow [2024-06-21 20:21:30,421 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 20:21:30,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:30,421 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 20:21:30,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:21:30,421 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 20:21:30,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 371890501, now seen corresponding path program 22 times [2024-06-21 20:21:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765393607] [2024-06-21 20:21:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:30,529 INFO 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 20:21:30,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:30,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765393607] [2024-06-21 20:21:30,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765393607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:30,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:30,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:30,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973286511] [2024-06-21 20:21:30,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:30,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:30,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:30,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7717 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 20:21:30,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:30,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:30,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:31,887 INFO L124 PetriNetUnfolderBase]: 3630/6143 cut-off events. [2024-06-21 20:21:31,888 INFO L125 PetriNetUnfolderBase]: For 809314/809320 co-relation queries the response was YES. [2024-06-21 20:21:31,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44569 conditions, 6143 events. 3630/6143 cut-off events. For 809314/809320 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42691 event pairs, 714 based on Foata normal form. 5/6137 useless extension candidates. Maximal degree in co-relation 44370. Up to 5289 conditions per place. [2024-06-21 20:21:31,980 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 457 selfloop transitions, 143 changer transitions 0/608 dead transitions. [2024-06-21 20:21:31,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 608 transitions, 9207 flow [2024-06-21 20:21:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:21:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:21:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:21:31,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:21:31,981 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7717 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:21:31,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 608 transitions, 9207 flow [2024-06-21 20:21:36,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 608 transitions, 9047 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:21:36,668 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7854 flow [2024-06-21 20:21:36,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7854, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-21 20:21:36,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:21:36,668 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7854 flow [2024-06-21 20:21:36,668 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 20:21:36,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:36,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:21:36,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:21:36,669 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 20:21:36,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 111227469, now seen corresponding path program 23 times [2024-06-21 20:21:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:36,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4045786] [2024-06-21 20:21:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:36,751 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 20:21:36,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:36,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4045786] [2024-06-21 20:21:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4045786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:36,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:36,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490302938] [2024-06-21 20:21:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:36,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:36,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:36,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7854 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 20:21:36,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:36,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:36,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:37,987 INFO L124 PetriNetUnfolderBase]: 3627/6151 cut-off events. [2024-06-21 20:21:37,987 INFO L125 PetriNetUnfolderBase]: For 813806/813812 co-relation queries the response was YES. [2024-06-21 20:21:38,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44744 conditions, 6151 events. 3627/6151 cut-off events. For 813806/813812 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42757 event pairs, 681 based on Foata normal form. 5/6151 useless extension candidates. Maximal degree in co-relation 44544. Up to 5286 conditions per place. [2024-06-21 20:21:38,082 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 456 selfloop transitions, 156 changer transitions 0/620 dead transitions. [2024-06-21 20:21:38,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 620 transitions, 9642 flow [2024-06-21 20:21:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:21:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:21:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 20:21:38,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 20:21:38,083 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7854 flow. Second operand 8 states and 208 transitions. [2024-06-21 20:21:38,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 620 transitions, 9642 flow [2024-06-21 20:21:42,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 620 transitions, 9261 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:21:43,002 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7804 flow [2024-06-21 20:21:43,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7804, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-21 20:21:43,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:21:43,003 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7804 flow [2024-06-21 20:21:43,003 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 20:21:43,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:43,003 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 20:21:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:21:43,004 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 20:21:43,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1613206385, now seen corresponding path program 24 times [2024-06-21 20:21:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:43,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772810069] [2024-06-21 20:21:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:43,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:43,108 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 20:21:43,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:43,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772810069] [2024-06-21 20:21:43,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772810069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:43,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:43,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:43,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813626743] [2024-06-21 20:21:43,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:43,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:43,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:43,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7804 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 20:21:43,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:43,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:43,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:44,444 INFO L124 PetriNetUnfolderBase]: 3624/6147 cut-off events. [2024-06-21 20:21:44,444 INFO L125 PetriNetUnfolderBase]: For 806083/806089 co-relation queries the response was YES. [2024-06-21 20:21:44,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44602 conditions, 6147 events. 3624/6147 cut-off events. For 806083/806089 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42744 event pairs, 681 based on Foata normal form. 5/6147 useless extension candidates. Maximal degree in co-relation 44402. Up to 5283 conditions per place. [2024-06-21 20:21:44,541 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 163 changer transitions 0/626 dead transitions. [2024-06-21 20:21:44,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 626 transitions, 9378 flow [2024-06-21 20:21:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 20:21:44,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:21:44,542 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7804 flow. Second operand 9 states and 231 transitions. [2024-06-21 20:21:44,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 626 transitions, 9378 flow [2024-06-21 20:21:49,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 626 transitions, 9005 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 20:21:49,393 INFO L231 Difference]: Finished difference. Result has 436 places, 588 transitions, 7779 flow [2024-06-21 20:21:49,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7779, PETRI_PLACES=436, PETRI_TRANSITIONS=588} [2024-06-21 20:21:49,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-21 20:21:49,394 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 588 transitions, 7779 flow [2024-06-21 20:21:49,394 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 20:21:49,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:49,394 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 20:21:49,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:21:49,394 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 20:21:49,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 543665407, now seen corresponding path program 13 times [2024-06-21 20:21:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:49,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649611650] [2024-06-21 20:21:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:49,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:49,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649611650] [2024-06-21 20:21:49,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649611650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:49,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:49,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:21:49,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156133651] [2024-06-21 20:21:49,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:49,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:21:49,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:21:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:21:49,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:49,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 588 transitions, 7779 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 20:21:49,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:49,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:49,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:50,710 INFO L124 PetriNetUnfolderBase]: 3629/6135 cut-off events. [2024-06-21 20:21:50,710 INFO L125 PetriNetUnfolderBase]: For 792399/792399 co-relation queries the response was YES. [2024-06-21 20:21:50,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44542 conditions, 6135 events. 3629/6135 cut-off events. For 792399/792399 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42576 event pairs, 707 based on Foata normal form. 1/6125 useless extension candidates. Maximal degree in co-relation 44343. Up to 5306 conditions per place. [2024-06-21 20:21:50,810 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 436 selfloop transitions, 164 changer transitions 0/608 dead transitions. [2024-06-21 20:21:50,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 608 transitions, 9543 flow [2024-06-21 20:21:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:21:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:21:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:21:50,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 20:21:50,811 INFO L175 Difference]: Start difference. First operand has 436 places, 588 transitions, 7779 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:21:50,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 608 transitions, 9543 flow [2024-06-21 20:21:55,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 608 transitions, 9187 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 20:21:55,657 INFO L231 Difference]: Finished difference. Result has 433 places, 591 transitions, 7813 flow [2024-06-21 20:21:55,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7813, PETRI_PLACES=433, PETRI_TRANSITIONS=591} [2024-06-21 20:21:55,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-21 20:21:55,657 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 591 transitions, 7813 flow [2024-06-21 20:21:55,657 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 20:21:55,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:55,658 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 20:21:55,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:21:55,658 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 20:21:55,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1311995427, now seen corresponding path program 14 times [2024-06-21 20:21:55,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675465817] [2024-06-21 20:21:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:55,763 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 20:21:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:55,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675465817] [2024-06-21 20:21:55,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675465817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:55,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:55,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:55,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362380421] [2024-06-21 20:21:55,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:55,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:55,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:55,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:21:55,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 591 transitions, 7813 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 20:21:55,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:55,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:21:55,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:57,124 INFO L124 PetriNetUnfolderBase]: 3626/6149 cut-off events. [2024-06-21 20:21:57,124 INFO L125 PetriNetUnfolderBase]: For 757589/757589 co-relation queries the response was YES. [2024-06-21 20:21:57,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44153 conditions, 6149 events. 3626/6149 cut-off events. For 757589/757589 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42711 event pairs, 654 based on Foata normal form. 1/6148 useless extension candidates. Maximal degree in co-relation 43956. Up to 5430 conditions per place. [2024-06-21 20:21:57,207 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 517 selfloop transitions, 89 changer transitions 0/614 dead transitions. [2024-06-21 20:21:57,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 614 transitions, 9319 flow [2024-06-21 20:21:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:21:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:21:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:21:57,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-21 20:21:57,208 INFO L175 Difference]: Start difference. First operand has 433 places, 591 transitions, 7813 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:21:57,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 614 transitions, 9319 flow [2024-06-21 20:22:01,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 614 transitions, 9130 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:22:01,872 INFO L231 Difference]: Finished difference. Result has 435 places, 591 transitions, 7823 flow [2024-06-21 20:22:01,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7624, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7823, PETRI_PLACES=435, PETRI_TRANSITIONS=591} [2024-06-21 20:22:01,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-21 20:22:01,873 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 591 transitions, 7823 flow [2024-06-21 20:22:01,873 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 20:22:01,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:01,873 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 20:22:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:22:01,873 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 20:22:01,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:01,873 INFO L85 PathProgramCache]: Analyzing trace with hash -853531963, now seen corresponding path program 15 times [2024-06-21 20:22:01,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:01,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561566687] [2024-06-21 20:22:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:01,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:01,972 INFO 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 20:22:01,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:01,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561566687] [2024-06-21 20:22:01,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561566687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:01,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:01,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139440925] [2024-06-21 20:22:01,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:01,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:02,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:02,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 591 transitions, 7823 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 20:22:02,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:02,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:02,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:03,537 INFO L124 PetriNetUnfolderBase]: 3623/6127 cut-off events. [2024-06-21 20:22:03,537 INFO L125 PetriNetUnfolderBase]: For 767028/767028 co-relation queries the response was YES. [2024-06-21 20:22:03,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43996 conditions, 6127 events. 3623/6127 cut-off events. For 767028/767028 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42540 event pairs, 705 based on Foata normal form. 1/6117 useless extension candidates. Maximal degree in co-relation 43797. Up to 5300 conditions per place. [2024-06-21 20:22:03,619 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 431 selfloop transitions, 168 changer transitions 0/607 dead transitions. [2024-06-21 20:22:03,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 607 transitions, 9535 flow [2024-06-21 20:22:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:22:03,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 20:22:03,620 INFO L175 Difference]: Start difference. First operand has 435 places, 591 transitions, 7823 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:22:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 607 transitions, 9535 flow [2024-06-21 20:22:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 607 transitions, 9334 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:22:08,169 INFO L231 Difference]: Finished difference. Result has 437 places, 591 transitions, 7972 flow [2024-06-21 20:22:08,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7972, PETRI_PLACES=437, PETRI_TRANSITIONS=591} [2024-06-21 20:22:08,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:22:08,169 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 591 transitions, 7972 flow [2024-06-21 20:22:08,169 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 20:22:08,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:08,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:22:08,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:22:08,169 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 20:22:08,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash -396034881, now seen corresponding path program 16 times [2024-06-21 20:22:08,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:08,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5644738] [2024-06-21 20:22:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:08,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:08,260 INFO 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 20:22:08,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:08,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5644738] [2024-06-21 20:22:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5644738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:08,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066205024] [2024-06-21 20:22:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:08,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:08,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:08,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:08,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 591 transitions, 7972 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 20:22:08,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:08,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:08,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:09,769 INFO L124 PetriNetUnfolderBase]: 3620/6144 cut-off events. [2024-06-21 20:22:09,769 INFO L125 PetriNetUnfolderBase]: For 762337/762343 co-relation queries the response was YES. [2024-06-21 20:22:09,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44036 conditions, 6144 events. 3620/6144 cut-off events. For 762337/762343 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 42745 event pairs, 699 based on Foata normal form. 5/6144 useless extension candidates. Maximal degree in co-relation 43837. Up to 5297 conditions per place. [2024-06-21 20:22:09,856 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 164 changer transitions 0/610 dead transitions. [2024-06-21 20:22:09,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 610 transitions, 9698 flow [2024-06-21 20:22:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:22:09,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 20:22:09,857 INFO L175 Difference]: Start difference. First operand has 437 places, 591 transitions, 7972 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:22:09,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 610 transitions, 9698 flow [2024-06-21 20:22:13,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 610 transitions, 9247 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:22:13,991 INFO L231 Difference]: Finished difference. Result has 436 places, 591 transitions, 7863 flow [2024-06-21 20:22:13,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7525, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7863, PETRI_PLACES=436, PETRI_TRANSITIONS=591} [2024-06-21 20:22:13,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-21 20:22:13,992 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 591 transitions, 7863 flow [2024-06-21 20:22:13,992 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 20:22:13,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:13,992 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 20:22:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:22:13,992 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 20:22:13,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1590868109, now seen corresponding path program 17 times [2024-06-21 20:22:13,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:13,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424061637] [2024-06-21 20:22:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:14,085 INFO 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 20:22:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424061637] [2024-06-21 20:22:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424061637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:14,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:14,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:14,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500454757] [2024-06-21 20:22:14,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:14,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:14,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:14,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 591 transitions, 7863 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 20:22:14,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:14,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:14,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:15,736 INFO L124 PetriNetUnfolderBase]: 3625/6151 cut-off events. [2024-06-21 20:22:15,736 INFO L125 PetriNetUnfolderBase]: For 761422/761428 co-relation queries the response was YES. [2024-06-21 20:22:15,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44013 conditions, 6151 events. 3625/6151 cut-off events. For 761422/761428 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42852 event pairs, 706 based on Foata normal form. 5/6151 useless extension candidates. Maximal degree in co-relation 43814. Up to 5303 conditions per place. [2024-06-21 20:22:15,819 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 437 selfloop transitions, 167 changer transitions 0/612 dead transitions. [2024-06-21 20:22:15,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 612 transitions, 9409 flow [2024-06-21 20:22:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:22:15,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 20:22:15,820 INFO L175 Difference]: Start difference. First operand has 436 places, 591 transitions, 7863 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:22:15,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 612 transitions, 9409 flow [2024-06-21 20:22:20,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 612 transitions, 8791 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 20:22:20,391 INFO L231 Difference]: Finished difference. Result has 434 places, 594 transitions, 7647 flow [2024-06-21 20:22:20,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7270, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7647, PETRI_PLACES=434, PETRI_TRANSITIONS=594} [2024-06-21 20:22:20,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-21 20:22:20,392 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 594 transitions, 7647 flow [2024-06-21 20:22:20,393 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 20:22:20,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:20,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:22:20,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:22:20,393 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 20:22:20,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash -771931581, now seen corresponding path program 18 times [2024-06-21 20:22:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:20,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659706268] [2024-06-21 20:22:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:20,516 INFO 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 20:22:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659706268] [2024-06-21 20:22:20,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659706268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:20,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:20,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665258110] [2024-06-21 20:22:20,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:20,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:20,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:20,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:20,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:20,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 594 transitions, 7647 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 20:22:20,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:20,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:20,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:22,219 INFO L124 PetriNetUnfolderBase]: 3622/6146 cut-off events. [2024-06-21 20:22:22,219 INFO L125 PetriNetUnfolderBase]: For 750232/750238 co-relation queries the response was YES. [2024-06-21 20:22:22,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43610 conditions, 6146 events. 3622/6146 cut-off events. For 750232/750238 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42721 event pairs, 690 based on Foata normal form. 5/6147 useless extension candidates. Maximal degree in co-relation 43412. Up to 5300 conditions per place. [2024-06-21 20:22:22,311 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 441 selfloop transitions, 172 changer transitions 0/621 dead transitions. [2024-06-21 20:22:22,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 621 transitions, 9179 flow [2024-06-21 20:22:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:22:22,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 20:22:22,312 INFO L175 Difference]: Start difference. First operand has 434 places, 594 transitions, 7647 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:22:22,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 621 transitions, 9179 flow [2024-06-21 20:22:26,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 621 transitions, 8938 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:22:26,608 INFO L231 Difference]: Finished difference. Result has 436 places, 594 transitions, 7770 flow [2024-06-21 20:22:26,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7770, PETRI_PLACES=436, PETRI_TRANSITIONS=594} [2024-06-21 20:22:26,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-21 20:22:26,608 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 594 transitions, 7770 flow [2024-06-21 20:22:26,609 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 20:22:26,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:26,609 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 20:22:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:22:26,609 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 20:22:26,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash -477148113, now seen corresponding path program 25 times [2024-06-21 20:22:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428992946] [2024-06-21 20:22:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:26,723 INFO 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 20:22:26,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428992946] [2024-06-21 20:22:26,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428992946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:26,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:26,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:26,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049289047] [2024-06-21 20:22:26,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:26,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:26,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:26,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:26,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 594 transitions, 7770 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 20:22:26,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:26,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:26,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:28,291 INFO L124 PetriNetUnfolderBase]: 3619/6142 cut-off events. [2024-06-21 20:22:28,291 INFO L125 PetriNetUnfolderBase]: For 744714/744720 co-relation queries the response was YES. [2024-06-21 20:22:28,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43529 conditions, 6142 events. 3619/6142 cut-off events. For 744714/744720 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42731 event pairs, 673 based on Foata normal form. 5/6143 useless extension candidates. Maximal degree in co-relation 43330. Up to 5278 conditions per place. [2024-06-21 20:22:28,389 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 464 selfloop transitions, 163 changer transitions 0/635 dead transitions. [2024-06-21 20:22:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 635 transitions, 9128 flow [2024-06-21 20:22:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:22:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:22:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-21 20:22:28,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170731707317073 [2024-06-21 20:22:28,390 INFO L175 Difference]: Start difference. First operand has 436 places, 594 transitions, 7770 flow. Second operand 10 states and 253 transitions. [2024-06-21 20:22:28,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 635 transitions, 9128 flow [2024-06-21 20:22:32,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 635 transitions, 8781 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:22:32,472 INFO L231 Difference]: Finished difference. Result has 438 places, 594 transitions, 7771 flow [2024-06-21 20:22:32,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7423, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7771, PETRI_PLACES=438, PETRI_TRANSITIONS=594} [2024-06-21 20:22:32,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-21 20:22:32,472 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 594 transitions, 7771 flow [2024-06-21 20:22:32,472 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 20:22:32,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:32,472 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 20:22:32,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:22:32,472 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 20:22:32,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:32,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1843440719, now seen corresponding path program 19 times [2024-06-21 20:22:32,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:32,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415562233] [2024-06-21 20:22:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:32,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:32,651 INFO 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 20:22:32,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:32,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415562233] [2024-06-21 20:22:32,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415562233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:32,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:32,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853774114] [2024-06-21 20:22:32,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:32,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:32,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:32,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 594 transitions, 7771 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 20:22:32,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:32,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:32,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:34,145 INFO L124 PetriNetUnfolderBase]: 3616/6136 cut-off events. [2024-06-21 20:22:34,145 INFO L125 PetriNetUnfolderBase]: For 711500/711500 co-relation queries the response was YES. [2024-06-21 20:22:34,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43225 conditions, 6136 events. 3616/6136 cut-off events. For 711500/711500 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42604 event pairs, 654 based on Foata normal form. 1/6135 useless extension candidates. Maximal degree in co-relation 43028. Up to 5418 conditions per place. [2024-06-21 20:22:34,228 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 526 selfloop transitions, 89 changer transitions 0/623 dead transitions. [2024-06-21 20:22:34,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 623 transitions, 9075 flow [2024-06-21 20:22:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 20:22:34,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-21 20:22:34,229 INFO L175 Difference]: Start difference. First operand has 438 places, 594 transitions, 7771 flow. Second operand 7 states and 186 transitions. [2024-06-21 20:22:34,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 623 transitions, 9075 flow [2024-06-21 20:22:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 623 transitions, 8731 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 20:22:38,798 INFO L231 Difference]: Finished difference. Result has 435 places, 594 transitions, 7629 flow [2024-06-21 20:22:38,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7427, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7629, PETRI_PLACES=435, PETRI_TRANSITIONS=594} [2024-06-21 20:22:38,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-21 20:22:38,798 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 594 transitions, 7629 flow [2024-06-21 20:22:38,799 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 20:22:38,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:38,799 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 20:22:38,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:22:38,799 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 20:22:38,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash -771694431, now seen corresponding path program 20 times [2024-06-21 20:22:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:38,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408892071] [2024-06-21 20:22:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:38,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:38,902 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 20:22:38,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:38,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408892071] [2024-06-21 20:22:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408892071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:38,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:38,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928010599] [2024-06-21 20:22:38,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:38,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:38,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:38,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:38,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 594 transitions, 7629 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 20:22:38,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:40,350 INFO L124 PetriNetUnfolderBase]: 3613/6135 cut-off events. [2024-06-21 20:22:40,350 INFO L125 PetriNetUnfolderBase]: For 675693/675699 co-relation queries the response was YES. [2024-06-21 20:22:40,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42629 conditions, 6135 events. 3613/6135 cut-off events. For 675693/675699 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42752 event pairs, 705 based on Foata normal form. 5/6135 useless extension candidates. Maximal degree in co-relation 42432. Up to 5290 conditions per place. [2024-06-21 20:22:40,434 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 171 changer transitions 0/617 dead transitions. [2024-06-21 20:22:40,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 617 transitions, 8905 flow [2024-06-21 20:22:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:22:40,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 20:22:40,435 INFO L175 Difference]: Start difference. First operand has 435 places, 594 transitions, 7629 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:22:40,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 617 transitions, 8905 flow [2024-06-21 20:22:44,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 617 transitions, 8676 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:22:44,735 INFO L231 Difference]: Finished difference. Result has 435 places, 594 transitions, 7756 flow [2024-06-21 20:22:44,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7400, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7756, PETRI_PLACES=435, PETRI_TRANSITIONS=594} [2024-06-21 20:22:44,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-21 20:22:44,735 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 594 transitions, 7756 flow [2024-06-21 20:22:44,735 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 20:22:44,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:44,735 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 20:22:44,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:22:44,735 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 20:22:44,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1843437743, now seen corresponding path program 7 times [2024-06-21 20:22:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:44,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560003726] [2024-06-21 20:22:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:44,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:44,842 INFO 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 20:22:44,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:44,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560003726] [2024-06-21 20:22:44,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560003726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:44,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:44,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:44,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467968566] [2024-06-21 20:22:44,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:44,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:44,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:44,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 594 transitions, 7756 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 20:22:44,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:44,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:44,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:46,303 INFO L124 PetriNetUnfolderBase]: 3669/6224 cut-off events. [2024-06-21 20:22:46,304 INFO L125 PetriNetUnfolderBase]: For 772810/772810 co-relation queries the response was YES. [2024-06-21 20:22:46,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43513 conditions, 6224 events. 3669/6224 cut-off events. For 772810/772810 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 43246 event pairs, 536 based on Foata normal form. 16/6238 useless extension candidates. Maximal degree in co-relation 43316. Up to 5338 conditions per place. [2024-06-21 20:22:46,390 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 516 selfloop transitions, 105 changer transitions 0/629 dead transitions. [2024-06-21 20:22:46,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 629 transitions, 9162 flow [2024-06-21 20:22:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:22:46,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 20:22:46,391 INFO L175 Difference]: Start difference. First operand has 435 places, 594 transitions, 7756 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:22:46,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 629 transitions, 9162 flow [2024-06-21 20:22:50,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 629 transitions, 8620 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 20:22:50,103 INFO L231 Difference]: Finished difference. Result has 431 places, 596 transitions, 7518 flow [2024-06-21 20:22:50,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7214, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7518, PETRI_PLACES=431, PETRI_TRANSITIONS=596} [2024-06-21 20:22:50,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-21 20:22:50,104 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 596 transitions, 7518 flow [2024-06-21 20:22:50,104 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 20:22:50,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:50,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:22:50,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:22:50,104 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 20:22:50,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:50,104 INFO L85 PathProgramCache]: Analyzing trace with hash -400799457, now seen corresponding path program 8 times [2024-06-21 20:22:50,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:50,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45488788] [2024-06-21 20:22:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:50,287 INFO 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 20:22:50,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:50,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45488788] [2024-06-21 20:22:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45488788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:50,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584425565] [2024-06-21 20:22:50,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:50,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:50,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:50,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 596 transitions, 7518 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 20:22:50,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:50,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:50,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:51,733 INFO L124 PetriNetUnfolderBase]: 3725/6311 cut-off events. [2024-06-21 20:22:51,733 INFO L125 PetriNetUnfolderBase]: For 767956/767962 co-relation queries the response was YES. [2024-06-21 20:22:51,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44174 conditions, 6311 events. 3725/6311 cut-off events. For 767956/767962 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44070 event pairs, 724 based on Foata normal form. 20/6326 useless extension candidates. Maximal degree in co-relation 43979. Up to 5338 conditions per place. [2024-06-21 20:22:51,826 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 440 selfloop transitions, 171 changer transitions 0/619 dead transitions. [2024-06-21 20:22:51,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 619 transitions, 8876 flow [2024-06-21 20:22:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:22:51,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 20:22:51,827 INFO L175 Difference]: Start difference. First operand has 431 places, 596 transitions, 7518 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:22:51,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 619 transitions, 8876 flow [2024-06-21 20:22:55,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 619 transitions, 8648 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:22:55,266 INFO L231 Difference]: Finished difference. Result has 433 places, 598 transitions, 7716 flow [2024-06-21 20:22:55,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7716, PETRI_PLACES=433, PETRI_TRANSITIONS=598} [2024-06-21 20:22:55,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-21 20:22:55,267 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 598 transitions, 7716 flow [2024-06-21 20:22:55,267 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 20:22:55,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:55,267 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 20:22:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 20:22:55,267 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 20:22:55,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash -771697407, now seen corresponding path program 9 times [2024-06-21 20:22:55,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:55,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863296330] [2024-06-21 20:22:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:55,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:55,365 INFO 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 20:22:55,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:55,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863296330] [2024-06-21 20:22:55,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863296330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:55,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:55,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:55,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762585504] [2024-06-21 20:22:55,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:55,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:55,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:55,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:22:55,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 598 transitions, 7716 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 20:22:55,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:55,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:22:55,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:56,812 INFO L124 PetriNetUnfolderBase]: 3768/6384 cut-off events. [2024-06-21 20:22:56,812 INFO L125 PetriNetUnfolderBase]: For 768505/768511 co-relation queries the response was YES. [2024-06-21 20:22:56,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44617 conditions, 6384 events. 3768/6384 cut-off events. For 768505/768511 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44564 event pairs, 733 based on Foata normal form. 20/6399 useless extension candidates. Maximal degree in co-relation 44421. Up to 5343 conditions per place. [2024-06-21 20:22:56,902 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 442 selfloop transitions, 177 changer transitions 0/627 dead transitions. [2024-06-21 20:22:56,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 627 transitions, 9110 flow [2024-06-21 20:22:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:22:56,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 20:22:56,903 INFO L175 Difference]: Start difference. First operand has 433 places, 598 transitions, 7716 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:22:56,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 627 transitions, 9110 flow [2024-06-21 20:23:00,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 627 transitions, 8720 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:00,332 INFO L231 Difference]: Finished difference. Result has 435 places, 600 transitions, 7772 flow [2024-06-21 20:23:00,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7772, PETRI_PLACES=435, PETRI_TRANSITIONS=600} [2024-06-21 20:23:00,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-21 20:23:00,332 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 600 transitions, 7772 flow [2024-06-21 20:23:00,332 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 20:23:00,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:00,332 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 20:23:00,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 20:23:00,333 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 20:23:00,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1962095465, now seen corresponding path program 10 times [2024-06-21 20:23:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:00,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103550142] [2024-06-21 20:23:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:00,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:00,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:00,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103550142] [2024-06-21 20:23:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103550142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:00,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:00,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789424841] [2024-06-21 20:23:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:00,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:00,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 600 transitions, 7772 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 20:23:00,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:00,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:01,879 INFO L124 PetriNetUnfolderBase]: 3775/6401 cut-off events. [2024-06-21 20:23:01,879 INFO L125 PetriNetUnfolderBase]: For 700877/700883 co-relation queries the response was YES. [2024-06-21 20:23:01,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43833 conditions, 6401 events. 3775/6401 cut-off events. For 700877/700883 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 44682 event pairs, 602 based on Foata normal form. 16/6412 useless extension candidates. Maximal degree in co-relation 43636. Up to 4818 conditions per place. [2024-06-21 20:23:01,974 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 424 selfloop transitions, 203 changer transitions 0/635 dead transitions. [2024-06-21 20:23:01,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 635 transitions, 9396 flow [2024-06-21 20:23:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 20:23:01,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-21 20:23:01,975 INFO L175 Difference]: Start difference. First operand has 435 places, 600 transitions, 7772 flow. Second operand 7 states and 188 transitions. [2024-06-21 20:23:01,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 635 transitions, 9396 flow [2024-06-21 20:23:05,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 635 transitions, 8992 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:05,940 INFO L231 Difference]: Finished difference. Result has 437 places, 601 transitions, 7828 flow [2024-06-21 20:23:05,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7828, PETRI_PLACES=437, PETRI_TRANSITIONS=601} [2024-06-21 20:23:05,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:23:05,941 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 601 transitions, 7828 flow [2024-06-21 20:23:05,941 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 20:23:05,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:05,941 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 20:23:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 20:23:05,941 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 20:23:05,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1303415619, now seen corresponding path program 2 times [2024-06-21 20:23:05,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:05,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863277236] [2024-06-21 20:23:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:06,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:06,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863277236] [2024-06-21 20:23:06,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863277236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:06,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:06,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087010050] [2024-06-21 20:23:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:06,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:06,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 601 transitions, 7828 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 20:23:06,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:06,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:06,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:07,552 INFO L124 PetriNetUnfolderBase]: 3815/6468 cut-off events. [2024-06-21 20:23:07,552 INFO L125 PetriNetUnfolderBase]: For 686733/686733 co-relation queries the response was YES. [2024-06-21 20:23:07,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44210 conditions, 6468 events. 3815/6468 cut-off events. For 686733/686733 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 45132 event pairs, 544 based on Foata normal form. 12/6478 useless extension candidates. Maximal degree in co-relation 44012. Up to 5512 conditions per place. [2024-06-21 20:23:07,642 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 520 selfloop transitions, 105 changer transitions 0/633 dead transitions. [2024-06-21 20:23:07,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 633 transitions, 9232 flow [2024-06-21 20:23:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:23:07,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-21 20:23:07,643 INFO L175 Difference]: Start difference. First operand has 437 places, 601 transitions, 7828 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:23:07,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 633 transitions, 9232 flow [2024-06-21 20:23:11,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 633 transitions, 8840 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:11,161 INFO L231 Difference]: Finished difference. Result has 439 places, 603 transitions, 7713 flow [2024-06-21 20:23:11,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7436, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7713, PETRI_PLACES=439, PETRI_TRANSITIONS=603} [2024-06-21 20:23:11,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-21 20:23:11,161 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 603 transitions, 7713 flow [2024-06-21 20:23:11,161 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 20:23:11,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:11,161 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 20:23:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 20:23:11,162 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 20:23:11,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1950644561, now seen corresponding path program 3 times [2024-06-21 20:23:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257853231] [2024-06-21 20:23:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:11,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:11,257 INFO 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 20:23:11,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:11,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257853231] [2024-06-21 20:23:11,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257853231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:11,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:11,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:11,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551510754] [2024-06-21 20:23:11,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:11,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:11,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:11,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:11,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:11,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 603 transitions, 7713 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 20:23:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:11,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:12,764 INFO L124 PetriNetUnfolderBase]: 3855/6543 cut-off events. [2024-06-21 20:23:12,764 INFO L125 PetriNetUnfolderBase]: For 690617/690623 co-relation queries the response was YES. [2024-06-21 20:23:12,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44206 conditions, 6543 events. 3855/6543 cut-off events. For 690617/690623 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 45922 event pairs, 730 based on Foata normal form. 16/6554 useless extension candidates. Maximal degree in co-relation 44008. Up to 5236 conditions per place. [2024-06-21 20:23:12,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 436 selfloop transitions, 185 changer transitions 0/629 dead transitions. [2024-06-21 20:23:12,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 629 transitions, 9097 flow [2024-06-21 20:23:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:23:12,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 20:23:12,856 INFO L175 Difference]: Start difference. First operand has 439 places, 603 transitions, 7713 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:23:12,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 629 transitions, 9097 flow [2024-06-21 20:23:17,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 629 transitions, 8842 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:17,121 INFO L231 Difference]: Finished difference. Result has 441 places, 605 transitions, 7902 flow [2024-06-21 20:23:17,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7458, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7902, PETRI_PLACES=441, PETRI_TRANSITIONS=605} [2024-06-21 20:23:17,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-21 20:23:17,122 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 605 transitions, 7902 flow [2024-06-21 20:23:17,122 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 20:23:17,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:17,122 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 20:23:17,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 20:23:17,122 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 20:23:17,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash 454554813, now seen corresponding path program 4 times [2024-06-21 20:23:17,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:17,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792155483] [2024-06-21 20:23:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:17,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:17,231 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 20:23:17,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:17,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792155483] [2024-06-21 20:23:17,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792155483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:17,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:17,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980828769] [2024-06-21 20:23:17,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:17,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:17,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 605 transitions, 7902 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 20:23:17,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:17,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:17,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:18,904 INFO L124 PetriNetUnfolderBase]: 3908/6635 cut-off events. [2024-06-21 20:23:18,905 INFO L125 PetriNetUnfolderBase]: For 715779/715779 co-relation queries the response was YES. [2024-06-21 20:23:18,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45368 conditions, 6635 events. 3908/6635 cut-off events. For 715779/715779 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46657 event pairs, 513 based on Foata normal form. 12/6645 useless extension candidates. Maximal degree in co-relation 45169. Up to 5338 conditions per place. [2024-06-21 20:23:18,996 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 525 selfloop transitions, 103 changer transitions 0/636 dead transitions. [2024-06-21 20:23:18,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 636 transitions, 9550 flow [2024-06-21 20:23:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:23:18,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 20:23:18,997 INFO L175 Difference]: Start difference. First operand has 441 places, 605 transitions, 7902 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:23:18,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 636 transitions, 9550 flow [2024-06-21 20:23:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 636 transitions, 9126 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:22,519 INFO L231 Difference]: Finished difference. Result has 443 places, 607 transitions, 7765 flow [2024-06-21 20:23:22,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7765, PETRI_PLACES=443, PETRI_TRANSITIONS=607} [2024-06-21 20:23:22,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-21 20:23:22,520 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 607 transitions, 7765 flow [2024-06-21 20:23:22,521 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 20:23:22,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:22,521 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 20:23:22,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 20:23:22,521 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 20:23:22,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1329947573, now seen corresponding path program 1 times [2024-06-21 20:23:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642833955] [2024-06-21 20:23:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:22,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:22,633 INFO 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 20:23:22,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:22,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642833955] [2024-06-21 20:23:22,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642833955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:22,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:22,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:23:22,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259344875] [2024-06-21 20:23:22,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:22,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:23:22,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:22,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:23:22,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:23:22,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:22,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 607 transitions, 7765 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 20:23:22,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:22,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:24,282 INFO L124 PetriNetUnfolderBase]: 3942/6674 cut-off events. [2024-06-21 20:23:24,282 INFO L125 PetriNetUnfolderBase]: For 677698/677704 co-relation queries the response was YES. [2024-06-21 20:23:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45826 conditions, 6674 events. 3942/6674 cut-off events. For 677698/677704 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 47008 event pairs, 738 based on Foata normal form. 6/6671 useless extension candidates. Maximal degree in co-relation 45626. Up to 5916 conditions per place. [2024-06-21 20:23:24,374 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 550 selfloop transitions, 78 changer transitions 0/636 dead transitions. [2024-06-21 20:23:24,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 636 transitions, 9479 flow [2024-06-21 20:23:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:23:24,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 20:23:24,375 INFO L175 Difference]: Start difference. First operand has 443 places, 607 transitions, 7765 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:23:24,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 636 transitions, 9479 flow [2024-06-21 20:23:29,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 636 transitions, 9342 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:23:29,101 INFO L231 Difference]: Finished difference. Result has 448 places, 613 transitions, 7982 flow [2024-06-21 20:23:29,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7982, PETRI_PLACES=448, PETRI_TRANSITIONS=613} [2024-06-21 20:23:29,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-21 20:23:29,101 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 613 transitions, 7982 flow [2024-06-21 20:23:29,101 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 20:23:29,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:29,101 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 20:23:29,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 20:23:29,102 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 20:23:29,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1887467269, now seen corresponding path program 2 times [2024-06-21 20:23:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592275705] [2024-06-21 20:23:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:29,225 INFO 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 20:23:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592275705] [2024-06-21 20:23:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592275705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:23:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852239326] [2024-06-21 20:23:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:23:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:23:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:23:29,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:29,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 613 transitions, 7982 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 20:23:29,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:29,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:29,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:31,085 INFO L124 PetriNetUnfolderBase]: 3950/6689 cut-off events. [2024-06-21 20:23:31,085 INFO L125 PetriNetUnfolderBase]: For 687297/687303 co-relation queries the response was YES. [2024-06-21 20:23:31,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46123 conditions, 6689 events. 3950/6689 cut-off events. For 687297/687303 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 47109 event pairs, 745 based on Foata normal form. 6/6688 useless extension candidates. Maximal degree in co-relation 45920. Up to 5970 conditions per place. [2024-06-21 20:23:31,177 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 552 selfloop transitions, 73 changer transitions 0/633 dead transitions. [2024-06-21 20:23:31,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 633 transitions, 9344 flow [2024-06-21 20:23:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:23:31,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-21 20:23:31,178 INFO L175 Difference]: Start difference. First operand has 448 places, 613 transitions, 7982 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:23:31,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 633 transitions, 9344 flow [2024-06-21 20:23:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 633 transitions, 9126 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-21 20:23:34,703 INFO L231 Difference]: Finished difference. Result has 452 places, 615 transitions, 7987 flow [2024-06-21 20:23:34,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7987, PETRI_PLACES=452, PETRI_TRANSITIONS=615} [2024-06-21 20:23:34,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 20:23:34,704 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 615 transitions, 7987 flow [2024-06-21 20:23:34,704 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 20:23:34,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:34,704 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 20:23:34,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 20:23:34,704 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 20:23:34,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1848496379, now seen corresponding path program 3 times [2024-06-21 20:23:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:34,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608548936] [2024-06-21 20:23:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:34,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:34,900 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 20:23:34,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:34,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608548936] [2024-06-21 20:23:34,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608548936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:34,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:23:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542276940] [2024-06-21 20:23:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:34,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:23:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:23:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:23:34,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:34,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 615 transitions, 7987 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 20:23:34,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:34,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:34,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:36,356 INFO L124 PetriNetUnfolderBase]: 3984/6765 cut-off events. [2024-06-21 20:23:36,357 INFO L125 PetriNetUnfolderBase]: For 703088/703094 co-relation queries the response was YES. [2024-06-21 20:23:36,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46975 conditions, 6765 events. 3984/6765 cut-off events. For 703088/703094 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 47766 event pairs, 629 based on Foata normal form. 6/6764 useless extension candidates. Maximal degree in co-relation 46770. Up to 5775 conditions per place. [2024-06-21 20:23:36,455 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 537 selfloop transitions, 104 changer transitions 0/649 dead transitions. [2024-06-21 20:23:36,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 649 transitions, 10076 flow [2024-06-21 20:23:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:23:36,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 20:23:36,456 INFO L175 Difference]: Start difference. First operand has 452 places, 615 transitions, 7987 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:23:36,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 649 transitions, 10076 flow [2024-06-21 20:23:41,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 649 transitions, 9903 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:41,006 INFO L231 Difference]: Finished difference. Result has 454 places, 624 transitions, 8324 flow [2024-06-21 20:23:41,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8324, PETRI_PLACES=454, PETRI_TRANSITIONS=624} [2024-06-21 20:23:41,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-21 20:23:41,007 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 624 transitions, 8324 flow [2024-06-21 20:23:41,007 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 20:23:41,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:41,007 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 20:23:41,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 20:23:41,007 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 20:23:41,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1836116219, now seen corresponding path program 4 times [2024-06-21 20:23:41,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:41,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49631106] [2024-06-21 20:23:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49631106] [2024-06-21 20:23:41,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49631106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:41,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:41,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:23:41,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525988064] [2024-06-21 20:23:41,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:23:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:23:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:23:41,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:41,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 624 transitions, 8324 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 20:23:41,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:41,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:41,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:42,824 INFO L124 PetriNetUnfolderBase]: 4005/6795 cut-off events. [2024-06-21 20:23:42,824 INFO L125 PetriNetUnfolderBase]: For 731591/731597 co-relation queries the response was YES. [2024-06-21 20:23:42,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47923 conditions, 6795 events. 4005/6795 cut-off events. For 731591/731597 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47982 event pairs, 632 based on Foata normal form. 6/6794 useless extension candidates. Maximal degree in co-relation 47717. Up to 5795 conditions per place. [2024-06-21 20:23:42,927 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 535 selfloop transitions, 107 changer transitions 0/650 dead transitions. [2024-06-21 20:23:42,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 650 transitions, 10260 flow [2024-06-21 20:23:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:23:42,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 20:23:42,928 INFO L175 Difference]: Start difference. First operand has 454 places, 624 transitions, 8324 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:23:42,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 650 transitions, 10260 flow [2024-06-21 20:23:48,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 650 transitions, 9976 flow, removed 105 selfloop flow, removed 2 redundant places. [2024-06-21 20:23:48,089 INFO L231 Difference]: Finished difference. Result has 459 places, 628 transitions, 8399 flow [2024-06-21 20:23:48,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8094, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8399, PETRI_PLACES=459, PETRI_TRANSITIONS=628} [2024-06-21 20:23:48,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-21 20:23:48,090 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 628 transitions, 8399 flow [2024-06-21 20:23:48,090 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 20:23:48,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:48,090 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 20:23:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 20:23:48,091 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 20:23:48,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash 899899141, now seen corresponding path program 5 times [2024-06-21 20:23:48,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:48,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497929166] [2024-06-21 20:23:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:48,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:48,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497929166] [2024-06-21 20:23:48,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497929166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:48,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:48,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:23:48,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938102792] [2024-06-21 20:23:48,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:48,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:23:48,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:23:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:23:48,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:48,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 628 transitions, 8399 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 20:23:48,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:48,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:48,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:50,044 INFO L124 PetriNetUnfolderBase]: 4013/6802 cut-off events. [2024-06-21 20:23:50,044 INFO L125 PetriNetUnfolderBase]: For 738608/738614 co-relation queries the response was YES. [2024-06-21 20:23:50,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47966 conditions, 6802 events. 4013/6802 cut-off events. For 738608/738614 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 48085 event pairs, 756 based on Foata normal form. 6/6801 useless extension candidates. Maximal degree in co-relation 47758. Up to 6063 conditions per place. [2024-06-21 20:23:50,138 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 565 selfloop transitions, 72 changer transitions 0/645 dead transitions. [2024-06-21 20:23:50,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 645 transitions, 9761 flow [2024-06-21 20:23:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:23:50,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-21 20:23:50,139 INFO L175 Difference]: Start difference. First operand has 459 places, 628 transitions, 8399 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:23:50,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 645 transitions, 9761 flow [2024-06-21 20:23:55,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 645 transitions, 9572 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 20:23:55,252 INFO L231 Difference]: Finished difference. Result has 463 places, 630 transitions, 8415 flow [2024-06-21 20:23:55,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8212, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8415, PETRI_PLACES=463, PETRI_TRANSITIONS=630} [2024-06-21 20:23:55,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-21 20:23:55,252 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 630 transitions, 8415 flow [2024-06-21 20:23:55,252 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 20:23:55,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:55,252 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 20:23:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 20:23:55,252 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 20:23:55,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash 909422341, now seen corresponding path program 6 times [2024-06-21 20:23:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478722663] [2024-06-21 20:23:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:55,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:55,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478722663] [2024-06-21 20:23:55,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478722663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:55,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:23:55,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679764567] [2024-06-21 20:23:55,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:55,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:23:55,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:55,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:23:55,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:23:55,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:23:55,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 630 transitions, 8415 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 20:23:55,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:55,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:23:55,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:57,106 INFO L124 PetriNetUnfolderBase]: 4034/6833 cut-off events. [2024-06-21 20:23:57,106 INFO L125 PetriNetUnfolderBase]: For 764680/764686 co-relation queries the response was YES. [2024-06-21 20:23:57,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48358 conditions, 6833 events. 4034/6833 cut-off events. For 764680/764686 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 48320 event pairs, 753 based on Foata normal form. 6/6828 useless extension candidates. Maximal degree in co-relation 48149. Up to 6059 conditions per place. [2024-06-21 20:23:57,201 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 563 selfloop transitions, 80 changer transitions 0/651 dead transitions. [2024-06-21 20:23:57,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 651 transitions, 10065 flow [2024-06-21 20:23:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:23:57,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-21 20:23:57,202 INFO L175 Difference]: Start difference. First operand has 463 places, 630 transitions, 8415 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:23:57,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 651 transitions, 10065 flow [2024-06-21 20:24:01,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 651 transitions, 9890 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:24:01,902 INFO L231 Difference]: Finished difference. Result has 466 places, 634 transitions, 8516 flow [2024-06-21 20:24:01,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8516, PETRI_PLACES=466, PETRI_TRANSITIONS=634} [2024-06-21 20:24:01,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-21 20:24:01,902 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 634 transitions, 8516 flow [2024-06-21 20:24:01,903 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 20:24:01,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:01,903 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 20:24:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 20:24:01,903 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 20:24:01,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2112420913, now seen corresponding path program 7 times [2024-06-21 20:24:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:01,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005048190] [2024-06-21 20:24:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:01,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:24:01,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:01,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005048190] [2024-06-21 20:24:01,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005048190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:01,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:01,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:24:01,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051866644] [2024-06-21 20:24:01,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:01,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:24:01,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:24:01,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:24:02,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 20:24:02,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 634 transitions, 8516 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 20:24:02,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:02,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 20:24:02,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:03,562 INFO L124 PetriNetUnfolderBase]: 4029/6827 cut-off events. [2024-06-21 20:24:03,562 INFO L125 PetriNetUnfolderBase]: For 761884/761890 co-relation queries the response was YES. [2024-06-21 20:24:03,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48224 conditions, 6827 events. 4029/6827 cut-off events. For 761884/761890 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 48247 event pairs, 748 based on Foata normal form. 2/6821 useless extension candidates. Maximal degree in co-relation 48013. Up to 6038 conditions per place. [2024-06-21 20:24:03,667 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 568 selfloop transitions, 84 changer transitions 0/660 dead transitions. [2024-06-21 20:24:03,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 660 transitions, 10120 flow [2024-06-21 20:24:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:24:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:24:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:24:03,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 20:24:03,668 INFO L175 Difference]: Start difference. First operand has 466 places, 634 transitions, 8516 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:24:03,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 660 transitions, 10120 flow